port OC_DB to MDB2

author: Robin <robin@Amaya.(none)> 2010-05-04 03:21:57 +0200
committer: Robin <robin@Amaya.(none)> 2010-05-04 03:21:57 +0200
commit: ede1c64eddeb3abdde5b67da03be906bfba1b4cc (patch)
tree: dc9792f4a87718953b0ebafc945b7a70d64efa4c /inc/MDB2
parent: cd1ecef75fad711798eb2120b15a7e554a31654c (diff)
download: nextcloud-server-ede1c64eddeb3abdde5b67da03be906bfba1b4cc.tar.gz
nextcloud-server-ede1c64eddeb3abdde5b67da03be906bfba1b4cc.zip
27 files changed, 17034 insertions, 0 deletions
diff --git a/inc/MDB2/Date.php b/inc/MDB2/Date.php
new file mode 100755
index 00000000000..ce846543a50
--- /dev/null
+++ b/inc/MDB2/Date.php
@@ -0,0 +1,183 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: Date.php,v 1.10 2006/03/01 12:15:32 lsmith Exp $
+//
+
+/**
+ * @package  MDB2
+ * @category Database
+ * @author   Lukas Smith <smith@pooteeweet.org>
+ */
+
+/**
+ * Several methods to convert the MDB2 native timestamp format (ISO based)
+ * to and from data structures that are convenient to worth with in side of php.
+ * For more complex date arithmetic please take a look at the Date package in PEAR
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Date
+{
+    // {{{ mdbNow()
+
+    /**
+     * return the current datetime
+     *
+     * @return string current datetime in the MDB2 format
+     * @access public
+     */
+    function mdbNow()
+    {
+        return date('Y-m-d H:i:s');
+    }
+    // }}}
+
+    // {{{ mdbToday()
+
+    /**
+     * return the current date
+     *
+     * @return string current date in the MDB2 format
+     * @access public
+     */
+    function mdbToday()
+    {
+        return date('Y-m-d');
+    }
+    // }}}
+
+    // {{{ mdbTime()
+
+    /**
+     * return the current time
+     *
+     * @return string current time in the MDB2 format
+     * @access public
+     */
+    function mdbTime()
+    {
+        return date('H:i:s');
+    }
+    // }}}
+
+    // {{{ date2Mdbstamp()
+
+    /**
+     * convert a date into a MDB2 timestamp
+     *
+     * @param int hour of the date
+     * @param int minute of the date
+     * @param int second of the date
+     * @param int month of the date
+     * @param int day of the date
+     * @param int year of the date
+     *
+     * @return string a valid MDB2 timestamp
+     * @access public
+     */
+    function date2Mdbstamp($hour = null, $minute = null, $second = null,
+        $month = null, $day = null, $year = null)
+    {
+        return MDB2_Date::unix2Mdbstamp(mktime($hour, $minute, $second, $month, $day, $year, -1));
+    }
+    // }}}
+
+    // {{{ unix2Mdbstamp()
+
+    /**
+     * convert a unix timestamp into a MDB2 timestamp
+     *
+     * @param int a valid unix timestamp
+     *
+     * @return string a valid MDB2 timestamp
+     * @access public
+     */
+    function unix2Mdbstamp($unix_timestamp)
+    {
+        return date('Y-m-d H:i:s', $unix_timestamp);
+    }
+    // }}}
+
+    // {{{ mdbstamp2Unix()
+
+    /**
+     * convert a MDB2 timestamp into a unix timestamp
+     *
+     * @param int a valid MDB2 timestamp
+     * @return string unix timestamp with the time stored in the MDB2 format
+     *
+     * @access public
+     */
+    function mdbstamp2Unix($mdb_timestamp)
+    {
+        $arr = MDB2_Date::mdbstamp2Date($mdb_timestamp);
+
+        return mktime($arr['hour'], $arr['minute'], $arr['second'], $arr['month'], $arr['day'], $arr['year'], -1);
+    }
+    // }}}
+
+    // {{{ mdbstamp2Date()
+
+    /**
+     * convert a MDB2 timestamp into an array containing all
+     * values necessary to pass to php's date() function
+     *
+     * @param int a valid MDB2 timestamp
+     *
+     * @return array with the time split
+     * @access public
+     */
+    function mdbstamp2Date($mdb_timestamp)
+    {
+        list($arr['year'], $arr['month'], $arr['day'], $arr['hour'], $arr['minute'], $arr['second']) =
+            sscanf($mdb_timestamp, "%04u-%02u-%02u %02u:%02u:%02u");
+        return $arr;
+    }
+    // }}}
+}
+
+?>
diff --git a/inc/MDB2/Driver/Datatype/Common.php b/inc/MDB2/Driver/Datatype/Common.php
new file mode 100755
index 00000000000..329bd60768d
--- /dev/null
+++ b/inc/MDB2/Driver/Datatype/Common.php
@@ -0,0 +1,1824 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: Common.php,v 1.139 2008/12/04 11:50:42 afz Exp $
+
+require_once 'MDB2/LOB.php';
+
+/**
+ * @package  MDB2
+ * @category Database
+ * @author   Lukas Smith <smith@pooteeweet.org>
+ */
+
+/**
+ * MDB2_Driver_Common: Base class that is extended by each MDB2 driver
+ *
+ * To load this module in the MDB2 object:
+ * $mdb->loadModule('Datatype');
+ *
+ * @package MDB2
+ * @category Database
+ * @author Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Datatype_Common extends MDB2_Module_Common
+{
+    var $valid_default_values = array(
+        'text'      => '',
+        'boolean'   => true,
+        'integer'   => 0,
+        'decimal'   => 0.0,
+        'float'     => 0.0,
+        'timestamp' => '1970-01-01 00:00:00',
+        'time'      => '00:00:00',
+        'date'      => '1970-01-01',
+        'clob'      => '',
+        'blob'      => '',
+    );
+
+    /**
+     * contains all LOB objects created with this MDB2 instance
+     * @var array
+     * @access protected
+     */
+    var $lobs = array();
+
+    // }}}
+    // {{{ getValidTypes()
+
+    /**
+     * Get the list of valid types
+     *
+     * This function returns an array of valid types as keys with the values
+     * being possible default values for all native datatypes and mapped types
+     * for custom datatypes.
+     *
+     * @return mixed array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getValidTypes()
+    {
+        $types = $this->valid_default_values;
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        if (!empty($db->options['datatype_map'])) {
+            foreach ($db->options['datatype_map'] as $type => $mapped_type) {
+                if (array_key_exists($mapped_type, $types)) {
+                    $types[$type] = $types[$mapped_type];
+                } elseif (!empty($db->options['datatype_map_callback'][$type])) {
+                    $parameter = array('type' => $type, 'mapped_type' => $mapped_type);
+                    $default =  call_user_func_array($db->options['datatype_map_callback'][$type], array(&$db, __FUNCTION__, $parameter));
+                    $types[$type] = $default;
+                }
+            }
+        }
+        return $types;
+    }
+
+    // }}}
+    // {{{ checkResultTypes()
+
+    /**
+     * Define the list of types to be associated with the columns of a given
+     * result set.
+     *
+     * This function may be called before invoking fetchRow(), fetchOne()
+     * fetchCole() and fetchAll() so that the necessary data type
+     * conversions are performed on the data to be retrieved by them. If this
+     * function is not called, the type of all result set columns is assumed
+     * to be text, thus leading to not perform any conversions.
+     *
+     * @param array $types array variable that lists the
+     *       data types to be expected in the result set columns. If this array
+     *       contains less types than the number of columns that are returned
+     *       in the result set, the remaining columns are assumed to be of the
+     *       type text. Currently, the types clob and blob are not fully
+     *       supported.
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function checkResultTypes($types)
+    {
+        $types = is_array($types) ? $types : array($types);
+        foreach ($types as $key => $type) {
+            if (!isset($this->valid_default_values[$type])) {
+                $db =& $this->getDBInstance();
+                if (PEAR::isError($db)) {
+                    return $db;
+                }
+                if (empty($db->options['datatype_map'][$type])) {
+                    return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                        $type.' for '.$key.' is not a supported column type', __FUNCTION__);
+                }
+            }
+        }
+        return $types;
+    }
+
+    // }}}
+    // {{{ _baseConvertResult()
+
+    /**
+     * General type conversion method
+     *
+     * @param mixed   $value reference to a value to be converted
+     * @param string  $type  specifies which type to convert to
+     * @param boolean $rtrim [optional] when TRUE [default], apply rtrim() to text
+     * @return object an MDB2 error on failure
+     * @access protected
+     */
+    function _baseConvertResult($value, $type, $rtrim = true)
+    {
+        switch ($type) {
+        case 'text':
+            if ($rtrim) {
+                $value = rtrim($value);
+            }
+            return $value;
+        case 'integer':
+            return intval($value);
+        case 'boolean':
+            return !empty($value);
+        case 'decimal':
+            return $value;
+        case 'float':
+            return doubleval($value);
+        case 'date':
+            return $value;
+        case 'time':
+            return $value;
+        case 'timestamp':
+            return $value;
+        case 'clob':
+        case 'blob':
+            $this->lobs[] = array(
+                'buffer' => null,
+                'position' => 0,
+                'lob_index' => null,
+                'endOfLOB' => false,
+                'resource' => $value,
+                'value' => null,
+                'loaded' => false,
+            );
+            end($this->lobs);
+            $lob_index = key($this->lobs);
+            $this->lobs[$lob_index]['lob_index'] = $lob_index;
+            return fopen('MDB2LOB://'.$lob_index.'@'.$this->db_index, 'r+');
+        }
+
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_INVALID, null, null,
+            'attempt to convert result value to an unknown type :' . $type, __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ convertResult()
+
+    /**
+     * Convert a value to a RDBMS indipendent MDB2 type
+     *
+     * @param mixed   $value value to be converted
+     * @param string  $type  specifies which type to convert to
+     * @param boolean $rtrim [optional] when TRUE [default], apply rtrim() to text
+     * @return mixed converted value
+     * @access public
+     */
+    function convertResult($value, $type, $rtrim = true)
+    {
+        if (is_null($value)) {
+            return null;
+        }
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        if (!empty($db->options['datatype_map'][$type])) {
+            $type = $db->options['datatype_map'][$type];
+            if (!empty($db->options['datatype_map_callback'][$type])) {
+                $parameter = array('type' => $type, 'value' => $value, 'rtrim' => $rtrim);
+                return call_user_func_array($db->options['datatype_map_callback'][$type], array(&$db, __FUNCTION__, $parameter));
+            }
+        }
+        return $this->_baseConvertResult($value, $type, $rtrim);
+    }
+
+    // }}}
+    // {{{ convertResultRow()
+
+    /**
+     * Convert a result row
+     *
+     * @param array   $types
+     * @param array   $row   specifies the types to convert to
+     * @param boolean $rtrim [optional] when TRUE [default], apply rtrim() to text
+     * @return mixed MDB2_OK on success, an MDB2 error on failure
+     * @access public
+     */
+    function convertResultRow($types, $row, $rtrim = true)
+    {
+        $types = $this->_sortResultFieldTypes(array_keys($row), $types);
+        foreach ($row as $key => $value) {
+            if (empty($types[$key])) {
+                continue;
+            }
+            $value = $this->convertResult($row[$key], $types[$key], $rtrim);
+            if (PEAR::isError($value)) {
+                return $value;
+            }
+            $row[$key] = $value;
+        }
+        return $row;
+    }
+
+    // }}}
+    // {{{ _sortResultFieldTypes()
+
+    /**
+     * convert a result row
+     *
+     * @param array $types
+     * @param array $row specifies the types to convert to
+     * @param bool   $rtrim   if to rtrim text values or not
+     * @return mixed MDB2_OK on success,  a MDB2 error on failure
+     * @access public
+     */
+    function _sortResultFieldTypes($columns, $types)
+    {
+        $n_cols = count($columns);
+        $n_types = count($types);
+        if ($n_cols > $n_types) {
+            for ($i= $n_cols - $n_types; $i >= 0; $i--) {
+                $types[] = null;
+            }
+        }
+        $sorted_types = array();
+        foreach ($columns as $col) {
+            $sorted_types[$col] = null;
+        }
+        foreach ($types as $name => $type) {
+            if (array_key_exists($name, $sorted_types)) {
+                $sorted_types[$name] = $type;
+                unset($types[$name]);
+            }
+        }
+        // if there are left types in the array, fill the null values of the
+        // sorted array with them, in order.
+        if (count($types)) {
+            reset($types);
+            foreach (array_keys($sorted_types) as $k) {
+                if (is_null($sorted_types[$k])) {
+                    $sorted_types[$k] = current($types);
+                    next($types);
+                }
+            }
+        }
+        return $sorted_types;
+    }
+
+    // }}}
+    // {{{ getDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare
+     * of the given type
+     *
+     * @param string $type type to which the value should be converted to
+     * @param string  $name   name the field to be declared.
+     * @param string  $field  definition of the field
+     * @return string  DBMS specific SQL code portion that should be used to
+     *                 declare the specified field.
+     * @access public
+     */
+    function getDeclaration($type, $name, $field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (!empty($db->options['datatype_map'][$type])) {
+            $type = $db->options['datatype_map'][$type];
+            if (!empty($db->options['datatype_map_callback'][$type])) {
+                $parameter = array('type' => $type, 'name' => $name, 'field' => $field);
+                return call_user_func_array($db->options['datatype_map_callback'][$type], array(&$db, __FUNCTION__, $parameter));
+            }
+            $field['type'] = $type;
+        }
+
+        if (!method_exists($this, "_get{$type}Declaration")) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'type not defined: '.$type, __FUNCTION__);
+        }
+        return $this->{"_get{$type}Declaration"}($name, $field);
+    }
+
+    // }}}
+    // {{{ getTypeDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an text type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param array $field  associative array with the name of the properties
+     *      of the field being declared as array indexes. Currently, the types
+     *      of supported field properties are as follows:
+     *
+     *      length
+     *          Integer value that determines the maximum length of the text
+     *          field. If this argument is missing the field should be
+     *          declared to have the longest length allowed by the DBMS.
+     *
+     *      default
+     *          Text value to be used as default for this field.
+     *
+     *      notnull
+     *          Boolean flag that indicates whether this field is constrained
+     *          to not be set to null.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *      declare the specified field.
+     * @access public
+     */
+    function getTypeDeclaration($field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        switch ($field['type']) {
+        case 'text':
+            $length = !empty($field['length']) ? $field['length'] : $db->options['default_text_field_length'];
+            $fixed = !empty($field['fixed']) ? $field['fixed'] : false;
+            return $fixed ? ($length ? 'CHAR('.$length.')' : 'CHAR('.$db->options['default_text_field_length'].')')
+                : ($length ? 'VARCHAR('.$length.')' : 'TEXT');
+        case 'clob':
+            return 'TEXT';
+        case 'blob':
+            return 'TEXT';
+        case 'integer':
+            return 'INT';
+        case 'boolean':
+            return 'INT';
+        case 'date':
+            return 'CHAR ('.strlen('YYYY-MM-DD').')';
+        case 'time':
+            return 'CHAR ('.strlen('HH:MM:SS').')';
+        case 'timestamp':
+            return 'CHAR ('.strlen('YYYY-MM-DD HH:MM:SS').')';
+        case 'float':
+            return 'TEXT';
+        case 'decimal':
+            return 'TEXT';
+        }
+        return '';
+    }
+
+    // }}}
+    // {{{ _getDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare a generic type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name   name the field to be declared.
+     * @param array  $field  associative array with the name of the properties
+     *      of the field being declared as array indexes. Currently, the types
+     *      of supported field properties are as follows:
+     *
+     *      length
+     *          Integer value that determines the maximum length of the text
+     *          field. If this argument is missing the field should be
+     *          declared to have the longest length allowed by the DBMS.
+     *
+     *      default
+     *          Text value to be used as default for this field.
+     *
+     *      notnull
+     *          Boolean flag that indicates whether this field is constrained
+     *          to not be set to null.
+     *      charset
+     *          Text value with the default CHARACTER SET for this field.
+     *      collation
+     *          Text value with the default COLLATION for this field.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *      declare the specified field, or a MDB2_Error on failure
+     * @access protected
+     */
+    function _getDeclaration($name, $field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        $declaration_options = $db->datatype->_getDeclarationOptions($field);
+        if (PEAR::isError($declaration_options)) {
+            return $declaration_options;
+        }
+        return $name.' '.$this->getTypeDeclaration($field).$declaration_options;
+    }
+
+    // }}}
+    // {{{ _getDeclarationOptions()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare a generic type
+     * field to be used in statement like CREATE TABLE, without the field name
+     * and type values (ie. just the character set, default value, if the
+     * field is permitted to be NULL or not, and the collation options).
+     *
+     * @param array  $field  associative array with the name of the properties
+     *      of the field being declared as array indexes. Currently, the types
+     *      of supported field properties are as follows:
+     *
+     *      default
+     *          Text value to be used as default for this field.
+     *      notnull
+     *          Boolean flag that indicates whether this field is constrained
+     *          to not be set to null.
+     *      charset
+     *          Text value with the default CHARACTER SET for this field.
+     *      collation
+     *          Text value with the default COLLATION for this field.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *      declare the specified field's options.
+     * @access protected
+     */
+    function _getDeclarationOptions($field)
+    {
+        $charset = empty($field['charset']) ? '' :
+            ' '.$this->_getCharsetFieldDeclaration($field['charset']);
+
+        $notnull = empty($field['notnull']) ? '' : ' NOT NULL';
+        $default = '';
+        if (array_key_exists('default', $field)) {
+            if ($field['default'] === '') {
+                $db =& $this->getDBInstance();
+                if (PEAR::isError($db)) {
+                    return $db;
+                }
+                $valid_default_values = $this->getValidTypes();
+                $field['default'] = $valid_default_values[$field['type']];
+                if ($field['default'] === ''&& ($db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL)) {
+                    $field['default'] = ' ';
+                }
+            }
+            if (!is_null($field['default'])) {
+                $default = ' DEFAULT ' . $this->quote($field['default'], $field['type']);
+            }
+        }
+
+        $collation = empty($field['collation']) ? '' :
+            ' '.$this->_getCollationFieldDeclaration($field['collation']);
+
+        return $charset.$default.$notnull.$collation;
+    }
+
+    // }}}
+    // {{{ _getCharsetFieldDeclaration()
+    
+    /**
+     * Obtain DBMS specific SQL code portion needed to set the CHARACTER SET
+     * of a field declaration to be used in statements like CREATE TABLE.
+     *
+     * @param string $charset   name of the charset
+     * @return string  DBMS specific SQL code portion needed to set the CHARACTER SET
+     *                 of a field declaration.
+     */
+    function _getCharsetFieldDeclaration($charset)
+    {
+        return '';
+    }
+
+    // }}}
+    // {{{ _getCollationFieldDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to set the COLLATION
+     * of a field declaration to be used in statements like CREATE TABLE.
+     *
+     * @param string $collation   name of the collation
+     * @return string  DBMS specific SQL code portion needed to set the COLLATION
+     *                 of a field declaration.
+     */
+    function _getCollationFieldDeclaration($collation)
+    {
+        return '';
+    }
+
+    // }}}
+    // {{{ _getIntegerDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an integer type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *       of the field being declared as array indexes. Currently, the types
+     *       of supported field properties are as follows:
+     *
+     *       unsigned
+     *           Boolean flag that indicates whether the field should be
+     *           declared as unsigned integer if possible.
+     *
+     *       default
+     *           Integer value to be used as default for this field.
+     *
+     *       notnull
+     *           Boolean flag that indicates whether this field is constrained
+     *           to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *       declare the specified field.
+     * @access protected
+     */
+    function _getIntegerDeclaration($name, $field)
+    {
+        if (!empty($field['unsigned'])) {
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+
+            $db->warnings[] = "unsigned integer field \"$name\" is being declared as signed integer";
+        }
+        return $this->_getDeclaration($name, $field);
+    }
+
+    // }}}
+    // {{{ _getTextDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an text type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *       of the field being declared as array indexes. Currently, the types
+     *       of supported field properties are as follows:
+     *
+     *       length
+     *           Integer value that determines the maximum length of the text
+     *           field. If this argument is missing the field should be
+     *           declared to have the longest length allowed by the DBMS.
+     *
+     *       default
+     *           Text value to be used as default for this field.
+     *
+     *       notnull
+     *           Boolean flag that indicates whether this field is constrained
+     *           to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *       declare the specified field.
+     * @access protected
+     */
+    function _getTextDeclaration($name, $field)
+    {
+        return $this->_getDeclaration($name, $field);
+    }
+
+    // }}}
+    // {{{ _getCLOBDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an character
+     * large object type field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *        of the field being declared as array indexes. Currently, the types
+     *        of supported field properties are as follows:
+     *
+     *        length
+     *            Integer value that determines the maximum length of the large
+     *            object field. If this argument is missing the field should be
+     *            declared to have the longest length allowed by the DBMS.
+     *
+     *        notnull
+     *            Boolean flag that indicates whether this field is constrained
+     *            to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *        declare the specified field.
+     * @access public
+     */
+    function _getCLOBDeclaration($name, $field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $notnull = empty($field['notnull']) ? '' : ' NOT NULL';
+        $name = $db->quoteIdentifier($name, true);
+        return $name.' '.$this->getTypeDeclaration($field).$notnull;
+    }
+
+    // }}}
+    // {{{ _getBLOBDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an binary large
+     * object type field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *        of the field being declared as array indexes. Currently, the types
+     *        of supported field properties are as follows:
+     *
+     *        length
+     *            Integer value that determines the maximum length of the large
+     *            object field. If this argument is missing the field should be
+     *            declared to have the longest length allowed by the DBMS.
+     *
+     *        notnull
+     *            Boolean flag that indicates whether this field is constrained
+     *            to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *        declare the specified field.
+     * @access protected
+     */
+    function _getBLOBDeclaration($name, $field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $notnull = empty($field['notnull']) ? '' : ' NOT NULL';
+        $name = $db->quoteIdentifier($name, true);
+        return $name.' '.$this->getTypeDeclaration($field).$notnull;
+    }
+
+    // }}}
+    // {{{ _getBooleanDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare a boolean type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *       of the field being declared as array indexes. Currently, the types
+     *       of supported field properties are as follows:
+     *
+     *       default
+     *           Boolean value to be used as default for this field.
+     *
+     *       notnullL
+     *           Boolean flag that indicates whether this field is constrained
+     *           to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *       declare the specified field.
+     * @access protected
+     */
+    function _getBooleanDeclaration($name, $field)
+    {
+        return $this->_getDeclaration($name, $field);
+    }
+
+    // }}}
+    // {{{ _getDateDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare a date type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *       of the field being declared as array indexes. Currently, the types
+     *       of supported field properties are as follows:
+     *
+     *       default
+     *           Date value to be used as default for this field.
+     *
+     *       notnull
+     *           Boolean flag that indicates whether this field is constrained
+     *           to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *       declare the specified field.
+     * @access protected
+     */
+    function _getDateDeclaration($name, $field)
+    {
+        return $this->_getDeclaration($name, $field);
+    }
+
+    // }}}
+    // {{{ _getTimestampDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare a timestamp
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *       of the field being declared as array indexes. Currently, the types
+     *       of supported field properties are as follows:
+     *
+     *       default
+     *           Timestamp value to be used as default for this field.
+     *
+     *       notnull
+     *           Boolean flag that indicates whether this field is constrained
+     *           to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *       declare the specified field.
+     * @access protected
+     */
+    function _getTimestampDeclaration($name, $field)
+    {
+        return $this->_getDeclaration($name, $field);
+    }
+
+    // }}}
+    // {{{ _getTimeDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare a time
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *       of the field being declared as array indexes. Currently, the types
+     *       of supported field properties are as follows:
+     *
+     *       default
+     *           Time value to be used as default for this field.
+     *
+     *       notnull
+     *           Boolean flag that indicates whether this field is constrained
+     *           to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *       declare the specified field.
+     * @access protected
+     */
+    function _getTimeDeclaration($name, $field)
+    {
+        return $this->_getDeclaration($name, $field);
+    }
+
+    // }}}
+    // {{{ _getFloatDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare a float type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *       of the field being declared as array indexes. Currently, the types
+     *       of supported field properties are as follows:
+     *
+     *       default
+     *           Float value to be used as default for this field.
+     *
+     *       notnull
+     *           Boolean flag that indicates whether this field is constrained
+     *           to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *       declare the specified field.
+     * @access protected
+     */
+    function _getFloatDeclaration($name, $field)
+    {
+        return $this->_getDeclaration($name, $field);
+    }
+
+    // }}}
+    // {{{ _getDecimalDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare a decimal type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *       of the field being declared as array indexes. Currently, the types
+     *       of supported field properties are as follows:
+     *
+     *       default
+     *           Decimal value to be used as default for this field.
+     *
+     *       notnull
+     *           Boolean flag that indicates whether this field is constrained
+     *           to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *       declare the specified field.
+     * @access protected
+     */
+    function _getDecimalDeclaration($name, $field)
+    {
+        return $this->_getDeclaration($name, $field);
+    }
+
+    // }}}
+    // {{{ compareDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access public
+     */
+    function compareDefinition($current, $previous)
+    {
+        $type = !empty($current['type']) ? $current['type'] : null;
+
+        if (!method_exists($this, "_compare{$type}Definition")) {
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+            if (!empty($db->options['datatype_map_callback'][$type])) {
+                $parameter = array('current' => $current, 'previous' => $previous);
+                $change =  call_user_func_array($db->options['datatype_map_callback'][$type], array(&$db, __FUNCTION__, $parameter));
+                return $change;
+            }
+            return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'type "'.$current['type'].'" is not yet supported', __FUNCTION__);
+        }
+
+        if (empty($previous['type']) || $previous['type'] != $type) {
+            return $current;
+        }
+
+        $change = $this->{"_compare{$type}Definition"}($current, $previous);
+
+        if ($previous['type'] != $type) {
+            $change['type'] = true;
+        }
+
+        $previous_notnull = !empty($previous['notnull']) ? $previous['notnull'] : false;
+        $notnull = !empty($current['notnull']) ? $current['notnull'] : false;
+        if ($previous_notnull != $notnull) {
+            $change['notnull'] = true;
+        }
+
+        $previous_default = array_key_exists('default', $previous) ? $previous['default'] :
+            ($previous_notnull ? '' : null);
+        $default = array_key_exists('default', $current) ? $current['default'] :
+            ($notnull ? '' : null);
+        if ($previous_default !== $default) {
+            $change['default'] = true;
+        }
+
+        return $change;
+    }
+
+    // }}}
+    // {{{ _compareIntegerDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an integer field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareIntegerDefinition($current, $previous)
+    {
+        $change = array();
+        $previous_unsigned = !empty($previous['unsigned']) ? $previous['unsigned'] : false;
+        $unsigned = !empty($current['unsigned']) ? $current['unsigned'] : false;
+        if ($previous_unsigned != $unsigned) {
+            $change['unsigned'] = true;
+        }
+        $previous_autoincrement = !empty($previous['autoincrement']) ? $previous['autoincrement'] : false;
+        $autoincrement = !empty($current['autoincrement']) ? $current['autoincrement'] : false;
+        if ($previous_autoincrement != $autoincrement) {
+            $change['autoincrement'] = true;
+        }
+        return $change;
+    }
+
+    // }}}
+    // {{{ _compareTextDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an text field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareTextDefinition($current, $previous)
+    {
+        $change = array();
+        $previous_length = !empty($previous['length']) ? $previous['length'] : 0;
+        $length = !empty($current['length']) ? $current['length'] : 0;
+        if ($previous_length != $length) {
+            $change['length'] = true;
+        }
+        $previous_fixed = !empty($previous['fixed']) ? $previous['fixed'] : 0;
+        $fixed = !empty($current['fixed']) ? $current['fixed'] : 0;
+        if ($previous_fixed != $fixed) {
+            $change['fixed'] = true;
+        }
+        return $change;
+    }
+
+    // }}}
+    // {{{ _compareCLOBDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an CLOB field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareCLOBDefinition($current, $previous)
+    {
+        return $this->_compareTextDefinition($current, $previous);
+    }
+
+    // }}}
+    // {{{ _compareBLOBDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an BLOB field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareBLOBDefinition($current, $previous)
+    {
+        return $this->_compareTextDefinition($current, $previous);
+    }
+
+    // }}}
+    // {{{ _compareDateDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an date field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareDateDefinition($current, $previous)
+    {
+        return array();
+    }
+
+    // }}}
+    // {{{ _compareTimeDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an time field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareTimeDefinition($current, $previous)
+    {
+        return array();
+    }
+
+    // }}}
+    // {{{ _compareTimestampDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an timestamp field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareTimestampDefinition($current, $previous)
+    {
+        return array();
+    }
+
+    // }}}
+    // {{{ _compareBooleanDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an boolean field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareBooleanDefinition($current, $previous)
+    {
+        return array();
+    }
+
+    // }}}
+    // {{{ _compareFloatDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an float field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareFloatDefinition($current, $previous)
+    {
+        return array();
+    }
+
+    // }}}
+    // {{{ _compareDecimalDefinition()
+
+    /**
+     * Obtain an array of changes that may need to applied to an decimal field
+     *
+     * @param array $current new definition
+     * @param array  $previous old definition
+     * @return array  containing all changes that will need to be applied
+     * @access protected
+     */
+    function _compareDecimalDefinition($current, $previous)
+    {
+        return array();
+    }
+
+    // }}}
+    // {{{ quote()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param string $type type to which the value should be converted to
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access public
+     */
+    function quote($value, $type = null, $quote = true, $escape_wildcards = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (is_null($value)
+            || ($value === '' && $db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL)
+        ) {
+            if (!$quote) {
+                return null;
+            }
+            return 'NULL';
+        }
+
+        if (is_null($type)) {
+            switch (gettype($value)) {
+            case 'integer':
+                $type = 'integer';
+                break;
+            case 'double':
+                // todo: default to decimal as float is quite unusual
+                // $type = 'float';
+                $type = 'decimal';
+                break;
+            case 'boolean':
+                $type = 'boolean';
+                break;
+            case 'array':
+                 $value = serialize($value);
+            case 'object':
+                 $type = 'text';
+                break;
+            default:
+                if (preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}$/', $value)) {
+                    $type = 'timestamp';
+                } elseif (preg_match('/^\d{2}:\d{2}$/', $value)) {
+                    $type = 'time';
+                } elseif (preg_match('/^\d{4}-\d{2}-\d{2}$/', $value)) {
+                    $type = 'date';
+                } else {
+                    $type = 'text';
+                }
+                break;
+            }
+        } elseif (!empty($db->options['datatype_map'][$type])) {
+            $type = $db->options['datatype_map'][$type];
+            if (!empty($db->options['datatype_map_callback'][$type])) {
+                $parameter = array('type' => $type, 'value' => $value, 'quote' => $quote, 'escape_wildcards' => $escape_wildcards);
+                return call_user_func_array($db->options['datatype_map_callback'][$type], array(&$db, __FUNCTION__, $parameter));
+            }
+        }
+
+        if (!method_exists($this, "_quote{$type}")) {
+            return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'type not defined: '.$type, __FUNCTION__);
+        }
+        $value = $this->{"_quote{$type}"}($value, $quote, $escape_wildcards);
+        if ($quote && $escape_wildcards && $db->string_quoting['escape_pattern']
+            && $db->string_quoting['escape'] !== $db->string_quoting['escape_pattern']
+        ) {
+            $value.= $this->patternEscapeString();
+        }
+        return $value;
+    }
+
+    // }}}
+    // {{{ _quoteInteger()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteInteger($value, $quote, $escape_wildcards)
+    {
+        return (int)$value;
+    }
+
+    // }}}
+    // {{{ _quoteText()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that already contains any DBMS specific
+     *       escaped character sequences.
+     * @access protected
+     */
+    function _quoteText($value, $quote, $escape_wildcards)
+    {
+        if (!$quote) {
+            return $value;
+        }
+
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $value = $db->escape($value, $escape_wildcards);
+        if (PEAR::isError($value)) {
+            return $value;
+        }
+        return "'".$value."'";
+    }
+
+    // }}}
+    // {{{ _readFile()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _readFile($value)
+    {
+        $close = false;
+        if (preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {
+            $close = true;
+            if ($match[1] == 'file://') {
+                $value = $match[2];
+            }
+            $value = @fopen($value, 'r');
+        }
+
+        if (is_resource($value)) {
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+
+            $fp = $value;
+            $value = '';
+            while (!@feof($fp)) {
+                $value.= @fread($fp, $db->options['lob_buffer_length']);
+            }
+            if ($close) {
+                @fclose($fp);
+            }
+        }
+
+        return $value;
+    }
+
+    // }}}
+    // {{{ _quoteLOB()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteLOB($value, $quote, $escape_wildcards)
+    {
+        $value = $this->_readFile($value);
+        if (PEAR::isError($value)) {
+            return $value;
+        }
+        return $this->_quoteText($value, $quote, $escape_wildcards);
+    }
+
+    // }}}
+    // {{{ _quoteCLOB()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteCLOB($value, $quote, $escape_wildcards)
+    {
+        return $this->_quoteLOB($value, $quote, $escape_wildcards);
+    }
+
+    // }}}
+    // {{{ _quoteBLOB()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteBLOB($value, $quote, $escape_wildcards)
+    {
+        return $this->_quoteLOB($value, $quote, $escape_wildcards);
+    }
+
+    // }}}
+    // {{{ _quoteBoolean()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteBoolean($value, $quote, $escape_wildcards)
+    {
+        return ($value ? 1 : 0);
+    }
+
+    // }}}
+    // {{{ _quoteDate()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteDate($value, $quote, $escape_wildcards)
+    {
+        if ($value === 'CURRENT_DATE') {
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+            if (isset($db->function) && is_a($db->function, 'MDB2_Driver_Function_Common')) {
+                return $db->function->now('date');
+            }
+            return 'CURRENT_DATE';
+        }
+        return $this->_quoteText($value, $quote, $escape_wildcards);
+    }
+
+    // }}}
+    // {{{ _quoteTimestamp()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteTimestamp($value, $quote, $escape_wildcards)
+    {
+        if ($value === 'CURRENT_TIMESTAMP') {
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+            if (isset($db->function) && is_a($db->function, 'MDB2_Driver_Function_Common')) {
+                return $db->function->now('timestamp');
+            }
+            return 'CURRENT_TIMESTAMP';
+        }
+        return $this->_quoteText($value, $quote, $escape_wildcards);
+    }
+
+    // }}}
+    // {{{ _quoteTime()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     *       compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteTime($value, $quote, $escape_wildcards)
+    {
+        if ($value === 'CURRENT_TIME') {
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+            if (isset($db->function) && is_a($db->function, 'MDB2_Driver_Function_Common')) {
+                return $db->function->now('time');
+            }
+            return 'CURRENT_TIME';
+        }
+        return $this->_quoteText($value, $quote, $escape_wildcards);
+    }
+
+    // }}}
+    // {{{ _quoteFloat()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteFloat($value, $quote, $escape_wildcards)
+    {
+        if (preg_match('/^(.*)e([-+])(\d+)$/i', $value, $matches)) {
+            $decimal = $this->_quoteDecimal($matches[1], $quote, $escape_wildcards);
+            $sign = $matches[2];
+            $exponent = str_pad($matches[3], 2, '0', STR_PAD_LEFT);
+            $value = $decimal.'E'.$sign.$exponent;
+        } else {
+            $value = $this->_quoteDecimal($value, $quote, $escape_wildcards);
+        }
+        return $value;
+    }
+
+    // }}}
+    // {{{ _quoteDecimal()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteDecimal($value, $quote, $escape_wildcards)
+    {
+        $value = (string)$value;
+        $value = preg_replace('/[^\d\.,\-+eE]/', '', $value);
+        if (preg_match('/[^\.\d]/', $value)) {
+            if (strpos($value, ',')) {
+                // 1000,00
+                if (!strpos($value, '.')) {
+                    // convert the last "," to a "."
+                    $value = strrev(str_replace(',', '.', strrev($value)));
+                // 1.000,00
+                } elseif (strpos($value, '.') && strpos($value, '.') < strpos($value, ',')) {
+                    $value = str_replace('.', '', $value);
+                    // convert the last "," to a "."
+                    $value = strrev(str_replace(',', '.', strrev($value)));
+                // 1,000.00
+                } else {
+                    $value = str_replace(',', '', $value);
+                }
+            }
+        }
+        return $value;
+    }
+
+    // }}}
+    // {{{ writeLOBToFile()
+
+    /**
+     * retrieve LOB from the database
+     *
+     * @param resource $lob stream handle
+     * @param string $file name of the file into which the LOb should be fetched
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access protected
+     */
+    function writeLOBToFile($lob, $file)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (preg_match('/^(\w+:\/\/)(.*)$/', $file, $match)) {
+            if ($match[1] == 'file://') {
+                $file = $match[2];
+            }
+        }
+
+        $fp = @fopen($file, 'wb');
+        while (!@feof($lob)) {
+            $result = @fread($lob, $db->options['lob_buffer_length']);
+            $read = strlen($result);
+            if (@fwrite($fp, $result, $read) != $read) {
+                @fclose($fp);
+                return $db->raiseError(MDB2_ERROR, null, null,
+                    'could not write to the output file', __FUNCTION__);
+            }
+        }
+        @fclose($fp);
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ _retrieveLOB()
+
+    /**
+     * retrieve LOB from the database
+     *
+     * @param array $lob array
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access protected
+     */
+    function _retrieveLOB(&$lob)
+    {
+        if (is_null($lob['value'])) {
+            $lob['value'] = $lob['resource'];
+        }
+        $lob['loaded'] = true;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ readLOB()
+
+    /**
+     * Read data from large object input stream.
+     *
+     * @param resource $lob stream handle
+     * @param string $data reference to a variable that will hold data
+     *                          to be read from the large object input stream
+     * @param integer $length    value that indicates the largest ammount ofdata
+     *                          to be read from the large object input stream.
+     * @return mixed the effective number of bytes read from the large object
+     *                      input stream on sucess or an MDB2 error object.
+     * @access public
+     * @see endOfLOB()
+     */
+    function _readLOB($lob, $length)
+    {
+        return substr($lob['value'], $lob['position'], $length);
+    }
+
+    // }}}
+    // {{{ _endOfLOB()
+
+    /**
+     * Determine whether it was reached the end of the large object and
+     * therefore there is no more data to be read for the its input stream.
+     *
+     * @param array $lob array
+     * @return mixed true or false on success, a MDB2 error on failure
+     * @access protected
+     */
+    function _endOfLOB($lob)
+    {
+        return $lob['endOfLOB'];
+    }
+
+    // }}}
+    // {{{ destroyLOB()
+
+    /**
+     * Free any resources allocated during the lifetime of the large object
+     * handler object.
+     *
+     * @param resource $lob stream handle
+     * @access public
+     */
+    function destroyLOB($lob)
+    {
+        $lob_data = stream_get_meta_data($lob);
+        $lob_index = $lob_data['wrapper_data']->lob_index;
+        fclose($lob);
+        if (isset($this->lobs[$lob_index])) {
+            $this->_destroyLOB($this->lobs[$lob_index]);
+            unset($this->lobs[$lob_index]);
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ _destroyLOB()
+
+    /**
+     * Free any resources allocated during the lifetime of the large object
+     * handler object.
+     *
+     * @param array $lob array
+     * @access private
+     */
+    function _destroyLOB(&$lob)
+    {
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ implodeArray()
+
+    /**
+     * apply a type to all values of an array and return as a comma seperated string
+     * useful for generating IN statements
+     *
+     * @access public
+     *
+     * @param array $array data array
+     * @param string $type determines type of the field
+     *
+     * @return string comma seperated values
+     */
+    function implodeArray($array, $type = false)
+    {
+        if (!is_array($array) || empty($array)) {
+            return 'NULL';
+        }
+        if ($type) {
+            foreach ($array as $value) {
+                $return[] = $this->quote($value, $type);
+            }
+        } else {
+            $return = $array;
+        }
+        return implode(', ', $return);
+    }
+
+    // }}}
+    // {{{ matchPattern()
+
+    /**
+     * build a pattern matching string
+     *
+     * @access public
+     *
+     * @param array $pattern even keys are strings, odd are patterns (% and _)
+     * @param string $operator optional pattern operator (LIKE, ILIKE and maybe others in the future)
+     * @param string $field optional field name that is being matched against
+     *                  (might be required when emulating ILIKE)
+     *
+     * @return string SQL pattern
+     */
+    function matchPattern($pattern, $operator = null, $field = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $match = '';
+        if (!is_null($operator)) {
+            $operator = strtoupper($operator);
+            switch ($operator) {
+            // case insensitive
+            case 'ILIKE':
+                if (is_null($field)) {
+                    return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                        'case insensitive LIKE matching requires passing the field name', __FUNCTION__);
+                }
+                $db->loadModule('Function', null, true);
+                $match = $db->function->lower($field).' LIKE ';
+                break;
+            // case sensitive
+            case 'LIKE':
+                $match = is_null($field) ? 'LIKE ' : $field.' LIKE ';
+                break;
+            default:
+                return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'not a supported operator type:'. $operator, __FUNCTION__);
+            }
+        }
+        $match.= "'";
+        foreach ($pattern as $key => $value) {
+            if ($key % 2) {
+                $match.= $value;
+            } else {
+                if ($operator === 'ILIKE') {
+                    $value = strtolower($value);
+                }
+                $escaped = $db->escape($value);
+                if (PEAR::isError($escaped)) {
+                    return $escaped;
+                }
+                $match.= $db->escapePattern($escaped);
+            }
+        }
+        $match.= "'";
+        $match.= $this->patternEscapeString();
+        return $match;
+    }
+
+    // }}}
+    // {{{ patternEscapeString()
+
+    /**
+     * build string to define pattern escape character
+     *
+     * @access public
+     *
+     * @return string define pattern escape character
+     */
+    function patternEscapeString()
+    {
+        return '';
+    }
+
+    // }}}
+    // {{{ mapNativeDatatype()
+
+    /**
+     * Maps a native array description of a field to a MDB2 datatype and length
+     *
+     * @param array  $field native field description
+     * @return array containing the various possible types, length, sign, fixed
+     * @access public
+     */
+    function mapNativeDatatype($field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        // If the user has specified an option to map the native field
+        // type to a custom MDB2 datatype...
+        $db_type = strtok($field['type'], '(), ');
+        if (!empty($db->options['nativetype_map_callback'][$db_type])) {
+            return call_user_func_array($db->options['nativetype_map_callback'][$db_type], array($db, $field));
+        }
+
+        // Otherwise perform the built-in (i.e. normal) MDB2 native type to
+        // MDB2 datatype conversion
+        return $this->_mapNativeDatatype($field);
+    }
+
+    // }}}
+    // {{{ _mapNativeDatatype()
+
+    /**
+     * Maps a native array description of a field to a MDB2 datatype and length
+     *
+     * @param array  $field native field description
+     * @return array containing the various possible types, length, sign, fixed
+     * @access public
+     */
+    function _mapNativeDatatype($field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ mapPrepareDatatype()
+
+    /**
+     * Maps an mdb2 datatype to mysqli prepare type
+     *
+     * @param string $type
+     * @return string
+     * @access public
+     */
+    function mapPrepareDatatype($type)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (!empty($db->options['datatype_map'][$type])) {
+            $type = $db->options['datatype_map'][$type];
+            if (!empty($db->options['datatype_map_callback'][$type])) {
+                $parameter = array('type' => $type);
+                return call_user_func_array($db->options['datatype_map_callback'][$type], array(&$db, __FUNCTION__, $parameter));
+            }
+        }
+
+        return $type;
+    }
+}
+?>
diff --git a/inc/MDB2/Driver/Datatype/mysql.php b/inc/MDB2/Driver/Datatype/mysql.php
new file mode 100755
index 00000000000..aeec86aefac
--- /dev/null
+++ b/inc/MDB2/Driver/Datatype/mysql.php
@@ -0,0 +1,553 @@
+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: mysql.php,v 1.65 2008/02/22 19:23:49 quipo Exp $
+//
+
+require_once 'MDB2/Driver/Datatype/Common.php';
+
+/**
+ * MDB2 MySQL driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Datatype_mysql extends MDB2_Driver_Datatype_Common
+{
+    // {{{ _getCharsetFieldDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to set the CHARACTER SET
+     * of a field declaration to be used in statements like CREATE TABLE.
+     *
+     * @param string $charset   name of the charset
+     * @return string  DBMS specific SQL code portion needed to set the CHARACTER SET
+     *                 of a field declaration.
+     */
+    function _getCharsetFieldDeclaration($charset)
+    {
+        return 'CHARACTER SET '.$charset;
+    }
+
+    // }}}
+    // {{{ _getCollationFieldDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to set the COLLATION
+     * of a field declaration to be used in statements like CREATE TABLE.
+     *
+     * @param string $collation   name of the collation
+     * @return string  DBMS specific SQL code portion needed to set the COLLATION
+     *                 of a field declaration.
+     */
+    function _getCollationFieldDeclaration($collation)
+    {
+        return 'COLLATE '.$collation;
+    }
+
+    // }}}
+    // {{{ getTypeDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an text type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param array $field  associative array with the name of the properties
+     *      of the field being declared as array indexes. Currently, the types
+     *      of supported field properties are as follows:
+     *
+     *      length
+     *          Integer value that determines the maximum length of the text
+     *          field. If this argument is missing the field should be
+     *          declared to have the longest length allowed by the DBMS.
+     *
+     *      default
+     *          Text value to be used as default for this field.
+     *
+     *      notnull
+     *          Boolean flag that indicates whether this field is constrained
+     *          to not be set to null.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *      declare the specified field.
+     * @access public
+     */
+    function getTypeDeclaration($field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        switch ($field['type']) {
+        case 'text':
+            if (empty($field['length']) && array_key_exists('default', $field)) {
+                $field['length'] = $db->varchar_max_length;
+            }
+            $length = !empty($field['length']) ? $field['length'] : false;
+            $fixed = !empty($field['fixed']) ? $field['fixed'] : false;
+            return $fixed ? ($length ? 'CHAR('.$length.')' : 'CHAR(255)')
+                : ($length ? 'VARCHAR('.$length.')' : 'TEXT');
+        case 'clob':
+            if (!empty($field['length'])) {
+                $length = $field['length'];
+                if ($length <= 255) {
+                    return 'TINYTEXT';
+                } elseif ($length <= 65532) {
+                    return 'TEXT';
+                } elseif ($length <= 16777215) {
+                    return 'MEDIUMTEXT';
+                }
+            }
+            return 'LONGTEXT';
+        case 'blob':
+            if (!empty($field['length'])) {
+                $length = $field['length'];
+                if ($length <= 255) {
+                    return 'TINYBLOB';
+                } elseif ($length <= 65532) {
+                    return 'BLOB';
+                } elseif ($length <= 16777215) {
+                    return 'MEDIUMBLOB';
+                }
+            }
+            return 'LONGBLOB';
+        case 'integer':
+            if (!empty($field['length'])) {
+                $length = $field['length'];
+                if ($length <= 1) {
+                    return 'TINYINT';
+                } elseif ($length == 2) {
+                    return 'SMALLINT';
+                } elseif ($length == 3) {
+                    return 'MEDIUMINT';
+                } elseif ($length == 4) {
+                    return 'INT';
+                } elseif ($length > 4) {
+                    return 'BIGINT';
+                }
+            }
+            return 'INT';
+        case 'boolean':
+            return 'TINYINT(1)';
+        case 'date':
+            return 'DATE';
+        case 'time':
+            return 'TIME';
+        case 'timestamp':
+            return 'DATETIME';
+        case 'float':
+            return 'DOUBLE';
+        case 'decimal':
+            $length = !empty($field['length']) ? $field['length'] : 18;
+            $scale = !empty($field['scale']) ? $field['scale'] : $db->options['decimal_places'];
+            return 'DECIMAL('.$length.','.$scale.')';
+        }
+        return '';
+    }
+
+    // }}}
+    // {{{ _getIntegerDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an integer type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string  $name   name the field to be declared.
+     * @param string  $field  associative array with the name of the properties
+     *                        of the field being declared as array indexes.
+     *                        Currently, the types of supported field
+     *                        properties are as follows:
+     *
+     *                       unsigned
+     *                        Boolean flag that indicates whether the field
+     *                        should be declared as unsigned integer if
+     *                        possible.
+     *
+     *                       default
+     *                        Integer value to be used as default for this
+     *                        field.
+     *
+     *                       notnull
+     *                        Boolean flag that indicates whether this field is
+     *                        constrained to not be set to null.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *                 declare the specified field.
+     * @access protected
+     */
+    function _getIntegerDeclaration($name, $field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $default = $autoinc = '';
+        if (!empty($field['autoincrement'])) {
+            $autoinc = ' AUTO_INCREMENT PRIMARY KEY';
+        } elseif (array_key_exists('default', $field)) {
+            if ($field['default'] === '') {
+                $field['default'] = empty($field['notnull']) ? null : 0;
+            }
+            $default = ' DEFAULT '.$this->quote($field['default'], 'integer');
+        }
+
+        $notnull = empty($field['notnull']) ? '' : ' NOT NULL';
+        $unsigned = empty($field['unsigned']) ? '' : ' UNSIGNED';
+        $name = $db->quoteIdentifier($name, true);
+        return $name.' '.$this->getTypeDeclaration($field).$unsigned.$default.$notnull.$autoinc;
+    }
+
+    // }}}
+    // {{{ _getFloatDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an float type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string  $name   name the field to be declared.
+     * @param string  $field  associative array with the name of the properties
+     *                        of the field being declared as array indexes.
+     *                        Currently, the types of supported field
+     *                        properties are as follows:
+     *
+     *                       unsigned
+     *                        Boolean flag that indicates whether the field
+     *                        should be declared as unsigned float if
+     *                        possible.
+     *
+     *                       default
+     *                        float value to be used as default for this
+     *                        field.
+     *
+     *                       notnull
+     *                        Boolean flag that indicates whether this field is
+     *                        constrained to not be set to null.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *                 declare the specified field.
+     * @access protected
+     */
+    function _getFloatDeclaration($name, $field)
+    {
+        // Since AUTO_INCREMENT can be used for integer or floating-point types,
+        // reuse the INTEGER declaration
+        // @see http://bugs.mysql.com/bug.php?id=31032
+        return $this->_getIntegerDeclaration($name, $field);
+    }
+
+    // }}}
+    // {{{ _getDecimalDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an decimal type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string  $name   name the field to be declared.
+     * @param string  $field  associative array with the name of the properties
+     *                        of the field being declared as array indexes.
+     *                        Currently, the types of supported field
+     *                        properties are as follows:
+     *
+     *                       unsigned
+     *                        Boolean flag that indicates whether the field
+     *                        should be declared as unsigned integer if
+     *                        possible.
+     *
+     *                       default
+     *                        Decimal value to be used as default for this
+     *                        field.
+     *
+     *                       notnull
+     *                        Boolean flag that indicates whether this field is
+     *                        constrained to not be set to null.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *                 declare the specified field.
+     * @access protected
+     */
+    function _getDecimalDeclaration($name, $field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $default = '';
+        if (array_key_exists('default', $field)) {
+            if ($field['default'] === '') {
+                $field['default'] = empty($field['notnull']) ? null : 0;
+            }
+            $default = ' DEFAULT '.$this->quote($field['default'], 'integer');
+        } elseif (empty($field['notnull'])) {
+            $default = ' DEFAULT NULL';
+        }
+
+        $notnull = empty($field['notnull']) ? '' : ' NOT NULL';
+        $unsigned = empty($field['unsigned']) ? '' : ' UNSIGNED';
+        $name = $db->quoteIdentifier($name, true);
+        return $name.' '.$this->getTypeDeclaration($field).$unsigned.$default.$notnull;
+    }
+
+    // }}}
+    // {{{ matchPattern()
+
+    /**
+     * build a pattern matching string
+     *
+     * @access public
+     *
+     * @param array $pattern even keys are strings, odd are patterns (% and _)
+     * @param string $operator optional pattern operator (LIKE, ILIKE and maybe others in the future)
+     * @param string $field optional field name that is being matched against
+     *                  (might be required when emulating ILIKE)
+     *
+     * @return string SQL pattern
+     */
+    function matchPattern($pattern, $operator = null, $field = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $match = '';
+        if (!is_null($operator)) {
+            $field = is_null($field) ? '' : $field.' ';
+            $operator = strtoupper($operator);
+            switch ($operator) {
+            // case insensitive
+            case 'ILIKE':
+                $match = $field.'LIKE ';
+                break;
+            // case sensitive
+            case 'LIKE':
+                $match = $field.'LIKE BINARY ';
+                break;
+            default:
+                return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'not a supported operator type:'. $operator, __FUNCTION__);
+            }
+        }
+        $match.= "'";
+        foreach ($pattern as $key => $value) {
+            if ($key % 2) {
+                $match.= $value;
+            } else {
+                $match.= $db->escapePattern($db->escape($value));
+            }
+        }
+        $match.= "'";
+        $match.= $this->patternEscapeString();
+        return $match;
+    }
+
+    // }}}
+    // {{{ _mapNativeDatatype()
+
+    /**
+     * Maps a native array description of a field to a MDB2 datatype and length
+     *
+     * @param array  $field native field description
+     * @return array containing the various possible types, length, sign, fixed
+     * @access public
+     */
+    function _mapNativeDatatype($field)
+    {
+        $db_type = strtolower($field['type']);
+        $db_type = strtok($db_type, '(), ');
+        if ($db_type == 'national') {
+            $db_type = strtok('(), ');
+        }
+        if (!empty($field['length'])) {
+            $length = strtok($field['length'], ', ');
+            $decimal = strtok(', ');
+        } else {
+            $length = strtok('(), ');
+            $decimal = strtok('(), ');
+        }
+        $type = array();
+        $unsigned = $fixed = null;
+        switch ($db_type) {
+        case 'tinyint':
+            $type[] = 'integer';
+            $type[] = 'boolean';
+            if (preg_match('/^(is|has)/', $field['name'])) {
+                $type = array_reverse($type);
+            }
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 1;
+            break;
+        case 'smallint':
+            $type[] = 'integer';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 2;
+            break;
+        case 'mediumint':
+            $type[] = 'integer';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 3;
+            break;
+        case 'int':
+        case 'integer':
+            $type[] = 'integer';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 4;
+            break;
+        case 'bigint':
+            $type[] = 'integer';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 8;
+            break;
+        case 'tinytext':
+        case 'mediumtext':
+        case 'longtext':
+        case 'text':
+        case 'varchar':
+            $fixed = false;
+        case 'string':
+        case 'char':
+            $type[] = 'text';
+            if ($length == '1') {
+                $type[] = 'boolean';
+                if (preg_match('/^(is|has)/', $field['name'])) {
+                    $type = array_reverse($type);
+                }
+            } elseif (strstr($db_type, 'text')) {
+                $type[] = 'clob';
+                if ($decimal == 'binary') {
+                    $type[] = 'blob';
+                }
+                $type = array_reverse($type);
+            }
+            if ($fixed !== false) {
+                $fixed = true;
+            }
+            break;
+        case 'enum':
+            $type[] = 'text';
+            preg_match_all('/\'.+\'/U', $field['type'], $matches);
+            $length = 0;
+            $fixed = false;
+            if (is_array($matches)) {
+                foreach ($matches[0] as $value) {
+                    $length = max($length, strlen($value)-2);
+                }
+                if ($length == '1' && count($matches[0]) == 2) {
+                    $type[] = 'boolean';
+                    if (preg_match('/^(is|has)/', $field['name'])) {
+                        $type = array_reverse($type);
+                    }
+                }
+            }
+            $type[] = 'integer';
+        case 'set':
+            $fixed = false;
+            $type[] = 'text';
+            $type[] = 'integer';
+            break;
+        case 'date':
+            $type[] = 'date';
+            $length = null;
+            break;
+        case 'datetime':
+        case 'timestamp':
+            $type[] = 'timestamp';
+            $length = null;
+            break;
+        case 'time':
+            $type[] = 'time';
+            $length = null;
+            break;
+        case 'float':
+        case 'double':
+        case 'real':
+            $type[] = 'float';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            break;
+        case 'unknown':
+        case 'decimal':
+        case 'numeric':
+            $type[] = 'decimal';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            if ($decimal !== false) {
+                $length = $length.','.$decimal;
+            }
+            break;
+        case 'tinyblob':
+        case 'mediumblob':
+        case 'longblob':
+        case 'blob':
+            $type[] = 'blob';
+            $length = null;
+            break;
+        case 'binary':
+        case 'varbinary':
+            $type[] = 'blob';
+            break;
+        case 'year':
+            $type[] = 'integer';
+            $type[] = 'date';
+            $length = null;
+            break;
+        default:
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+
+            return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'unknown database attribute type: '.$db_type, __FUNCTION__);
+        }
+
+        if ((int)$length <= 0) {
+            $length = null;
+        }
+
+        return array($type, $length, $unsigned, $fixed);
+    }
+
+    // }}}
+}
+
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Datatype/pgsql.php b/inc/MDB2/Driver/Datatype/pgsql.php
new file mode 100755
index 00000000000..29796804902
--- /dev/null
+++ b/inc/MDB2/Driver/Datatype/pgsql.php
@@ -0,0 +1,554 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Paul Cooper <pgc@ucecom.com>                                 |
+// +----------------------------------------------------------------------+
+//
+// $Id: pgsql.php,v 1.93 2008/08/28 20:32:57 afz Exp $
+
+require_once 'MDB2/Driver/Datatype/Common.php';
+
+/**
+ * MDB2 PostGreSQL driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Driver_Datatype_pgsql extends MDB2_Driver_Datatype_Common
+{
+    // {{{ _baseConvertResult()
+
+    /**
+     * General type conversion method
+     *
+     * @param mixed   $value refernce to a value to be converted
+     * @param string  $type  specifies which type to convert to
+     * @param boolean $rtrim [optional] when TRUE [default], apply rtrim() to text
+     * @return object a MDB2 error on failure
+     * @access protected
+     */
+    function _baseConvertResult($value, $type, $rtrim = true)
+    {
+        if (is_null($value)) {
+            return null;
+        }
+        switch ($type) {
+        case 'boolean':
+            return $value == 't';
+        case 'float':
+            return doubleval($value);
+        case 'date':
+            return $value;
+        case 'time':
+            return substr($value, 0, strlen('HH:MM:SS'));
+        case 'timestamp':
+            return substr($value, 0, strlen('YYYY-MM-DD HH:MM:SS'));
+        case 'blob':
+            $value = pg_unescape_bytea($value);
+            return parent::_baseConvertResult($value, $type, $rtrim);
+        }
+        return parent::_baseConvertResult($value, $type, $rtrim);
+    }
+
+    // }}}
+    // {{{ getTypeDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an text type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param array $field  associative array with the name of the properties
+     *      of the field being declared as array indexes. Currently, the types
+     *      of supported field properties are as follows:
+     *
+     *      length
+     *          Integer value that determines the maximum length of the text
+     *          field. If this argument is missing the field should be
+     *          declared to have the longest length allowed by the DBMS.
+     *
+     *      default
+     *          Text value to be used as default for this field.
+     *
+     *      notnull
+     *          Boolean flag that indicates whether this field is constrained
+     *          to not be set to null.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *      declare the specified field.
+     * @access public
+     */
+    function getTypeDeclaration($field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        switch ($field['type']) {
+        case 'text':
+            $length = !empty($field['length']) ? $field['length'] : false;
+            $fixed = !empty($field['fixed']) ? $field['fixed'] : false;
+            return $fixed ? ($length ? 'CHAR('.$length.')' : 'CHAR('.$db->options['default_text_field_length'].')')
+                : ($length ? 'VARCHAR('.$length.')' : 'TEXT');
+        case 'clob':
+            return 'TEXT';
+        case 'blob':
+            return 'BYTEA';
+        case 'integer':
+            if (!empty($field['autoincrement'])) {
+                if (!empty($field['length'])) {
+                    $length = $field['length'];
+                    if ($length > 4) {
+                        return 'BIGSERIAL PRIMARY KEY';
+                    }
+                }
+                return 'SERIAL PRIMARY KEY';
+            }
+            if (!empty($field['length'])) {
+                $length = $field['length'];
+                if ($length <= 2) {
+                    return 'SMALLINT';
+                } elseif ($length == 3 || $length == 4) {
+                    return 'INT';
+                } elseif ($length > 4) {
+                    return 'BIGINT';
+                }
+            }
+            return 'INT';
+        case 'boolean':
+            return 'BOOLEAN';
+        case 'date':
+            return 'DATE';
+        case 'time':
+            return 'TIME without time zone';
+        case 'timestamp':
+            return 'TIMESTAMP without time zone';
+        case 'float':
+            return 'FLOAT8';
+        case 'decimal':
+            $length = !empty($field['length']) ? $field['length'] : 18;
+            $scale = !empty($field['scale']) ? $field['scale'] : $db->options['decimal_places'];
+            return 'NUMERIC('.$length.','.$scale.')';
+        }
+    }
+
+    // }}}
+    // {{{ _getIntegerDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an integer type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string $name name the field to be declared.
+     * @param array $field associative array with the name of the properties
+     *       of the field being declared as array indexes. Currently, the types
+     *       of supported field properties are as follows:
+     *
+     *       unsigned
+     *           Boolean flag that indicates whether the field should be
+     *           declared as unsigned integer if possible.
+     *
+     *       default
+     *           Integer value to be used as default for this field.
+     *
+     *       notnull
+     *           Boolean flag that indicates whether this field is constrained
+     *           to not be set to null.
+     * @return string DBMS specific SQL code portion that should be used to
+     *       declare the specified field.
+     * @access protected
+     */
+    function _getIntegerDeclaration($name, $field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (!empty($field['unsigned'])) {
+            $db->warnings[] = "unsigned integer field \"$name\" is being declared as signed integer";
+        }
+        if (!empty($field['autoincrement'])) {
+            $name = $db->quoteIdentifier($name, true);
+            return $name.' '.$this->getTypeDeclaration($field);
+        }
+        $default = '';
+        if (array_key_exists('default', $field)) {
+            if ($field['default'] === '') {
+                $field['default'] = empty($field['notnull']) ? null : 0;
+            }
+            $default = ' DEFAULT '.$this->quote($field['default'], 'integer');
+        }
+
+        $notnull = empty($field['notnull']) ? '' : ' NOT NULL';
+        $name = $db->quoteIdentifier($name, true);
+        return $name.' '.$this->getTypeDeclaration($field).$default.$notnull;
+    }
+
+    // }}}
+    // {{{ _quoteCLOB()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *      a DBMS specific format.
+     * @access protected
+     */
+    function _quoteCLOB($value, $quote, $escape_wildcards)
+    {
+        return $this->_quoteText($value, $quote, $escape_wildcards);
+    }
+
+    // }}}
+    // {{{ _quoteBLOB()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *      a DBMS specific format.
+     * @access protected
+     */
+    function _quoteBLOB($value, $quote, $escape_wildcards)
+    {
+        if (!$quote) {
+            return $value;
+        }
+        if (version_compare(PHP_VERSION, '5.2.0RC6', '>=')) {
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+            $connection = $db->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+            $value = @pg_escape_bytea($connection, $value);
+        } else {
+            $value = @pg_escape_bytea($value);
+        }
+        return "'".$value."'";
+    }
+
+    // }}}
+    // {{{ _quoteBoolean()
+
+    /**
+     * Convert a text value into a DBMS specific format that is suitable to
+     * compose query statements.
+     *
+     * @param string $value text string value that is intended to be converted.
+     * @param bool $quote determines if the value should be quoted and escaped
+     * @param bool $escape_wildcards if to escape escape wildcards
+     * @return string text string that represents the given argument value in
+     *       a DBMS specific format.
+     * @access protected
+     */
+    function _quoteBoolean($value, $quote, $escape_wildcards)
+    {
+        $value = $value ? 't' : 'f';
+        if (!$quote) {
+            return $value;
+        }
+        return "'".$value."'";
+    }
+
+    // }}}
+    // {{{ matchPattern()
+
+    /**
+     * build a pattern matching string
+     *
+     * @access public
+     *
+     * @param array $pattern even keys are strings, odd are patterns (% and _)
+     * @param string $operator optional pattern operator (LIKE, ILIKE and maybe others in the future)
+     * @param string $field optional field name that is being matched against
+     *                  (might be required when emulating ILIKE)
+     *
+     * @return string SQL pattern
+     */
+    function matchPattern($pattern, $operator = null, $field = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $match = '';
+        if (!is_null($operator)) {
+            $field = is_null($field) ? '' : $field.' ';
+            $operator = strtoupper($operator);
+            switch ($operator) {
+            // case insensitive
+            case 'ILIKE':
+                $match = $field.'ILIKE ';
+                break;
+            // case sensitive
+            case 'LIKE':
+                $match = $field.'LIKE ';
+                break;
+            default:
+                return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'not a supported operator type:'. $operator, __FUNCTION__);
+            }
+        }
+        $match.= "'";
+        foreach ($pattern as $key => $value) {
+            if ($key % 2) {
+                $match.= $value;
+            } else {
+                $match.= $db->escapePattern($db->escape($value));
+            }
+        }
+        $match.= "'";
+        $match.= $this->patternEscapeString();
+        return $match;
+    }
+
+    // }}}
+    // {{{ patternEscapeString()
+
+    /**
+     * build string to define escape pattern string
+     *
+     * @access public
+     *
+     *
+     * @return string define escape pattern
+     */
+    function patternEscapeString()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        return ' ESCAPE '.$this->quote($db->string_quoting['escape_pattern']);
+    }
+
+    // }}}
+    // {{{ _mapNativeDatatype()
+
+    /**
+     * Maps a native array description of a field to a MDB2 datatype and length
+     *
+     * @param array  $field native field description
+     * @return array containing the various possible types, length, sign, fixed
+     * @access public
+     */
+    function _mapNativeDatatype($field)
+    {
+        $db_type = strtolower($field['type']);
+        $length = $field['length'];
+        $type = array();
+        $unsigned = $fixed = null;
+        switch ($db_type) {
+        case 'smallint':
+        case 'int2':
+            $type[] = 'integer';
+            $unsigned = false;
+            $length = 2;
+            if ($length == '2') {
+                $type[] = 'boolean';
+                if (preg_match('/^(is|has)/', $field['name'])) {
+                    $type = array_reverse($type);
+                }
+            }
+            break;
+        case 'int':
+        case 'int4':
+        case 'integer':
+        case 'serial':
+        case 'serial4':
+            $type[] = 'integer';
+            $unsigned = false;
+            $length = 4;
+            break;
+        case 'bigint':
+        case 'int8':
+        case 'bigserial':
+        case 'serial8':
+            $type[] = 'integer';
+            $unsigned = false;
+            $length = 8;
+            break;
+        case 'bool':
+        case 'boolean':
+            $type[] = 'boolean';
+            $length = null;
+            break;
+        case 'text':
+        case 'varchar':
+            $fixed = false;
+        case 'unknown':
+        case 'char':
+        case 'bpchar':
+            $type[] = 'text';
+            if ($length == '1') {
+                $type[] = 'boolean';
+                if (preg_match('/^(is|has)/', $field['name'])) {
+                    $type = array_reverse($type);
+                }
+            } elseif (strstr($db_type, 'text')) {
+                $type[] = 'clob';
+                $type = array_reverse($type);
+            }
+            if ($fixed !== false) {
+                $fixed = true;
+            }
+            break;
+        case 'date':
+            $type[] = 'date';
+            $length = null;
+            break;
+        case 'datetime':
+        case 'timestamp':
+        case 'timestamptz':
+            $type[] = 'timestamp';
+            $length = null;
+            break;
+        case 'time':
+            $type[] = 'time';
+            $length = null;
+            break;
+        case 'float':
+        case 'float4':
+        case 'float8':
+        case 'double':
+        case 'real':
+            $type[] = 'float';
+            break;
+        case 'decimal':
+        case 'money':
+        case 'numeric':
+            $type[] = 'decimal';
+            if (isset($field['scale'])) {
+                $length = $length.','.$field['scale'];
+            }
+            break;
+        case 'tinyblob':
+        case 'mediumblob':
+        case 'longblob':
+        case 'blob':
+        case 'bytea':
+            $type[] = 'blob';
+            $length = null;
+            break;
+        case 'oid':
+            $type[] = 'blob';
+            $type[] = 'clob';
+            $length = null;
+            break;
+        case 'year':
+            $type[] = 'integer';
+            $type[] = 'date';
+            $length = null;
+            break;
+        default:
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+            return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'unknown database attribute type: '.$db_type, __FUNCTION__);
+        }
+
+        if ((int)$length <= 0) {
+            $length = null;
+        }
+
+        return array($type, $length, $unsigned, $fixed);
+    }
+
+    // }}}
+    // {{{ mapPrepareDatatype()
+
+    /**
+     * Maps an mdb2 datatype to native prepare type
+     *
+     * @param string $type
+     * @return string
+     * @access public
+     */
+    function mapPrepareDatatype($type)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (!empty($db->options['datatype_map'][$type])) {
+            $type = $db->options['datatype_map'][$type];
+            if (!empty($db->options['datatype_map_callback'][$type])) {
+                $parameter = array('type' => $type);
+                return call_user_func_array($db->options['datatype_map_callback'][$type], array(&$db, __FUNCTION__, $parameter));
+            }
+        }
+
+        switch ($type) {
+            case 'integer':
+                return 'int';
+            case 'boolean':
+                return 'bool';
+            case 'decimal':
+            case 'float':
+                return 'numeric';
+            case 'clob':
+                return 'text';
+            case 'blob':
+                return 'bytea';
+            default:
+                break;
+        }
+        return $type;
+    }
+    // }}}
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Datatype/sqlite.php b/inc/MDB2/Driver/Datatype/sqlite.php
new file mode 100755
index 00000000000..270c1396841
--- /dev/null
+++ b/inc/MDB2/Driver/Datatype/sqlite.php
@@ -0,0 +1,409 @@
+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: sqlite.php,v 1.67 2008/02/22 19:58:06 quipo Exp $
+//
+
+require_once 'MDB2/Driver/Datatype/Common.php';
+
+/**
+ * MDB2 SQLite driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Datatype_sqlite extends MDB2_Driver_Datatype_Common
+{
+    // {{{ _getCollationFieldDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to set the COLLATION
+     * of a field declaration to be used in statements like CREATE TABLE.
+     *
+     * @param string $collation name of the collation
+     *
+     * @return string DBMS specific SQL code portion needed to set the COLLATION
+     *                of a field declaration.
+     */
+    function _getCollationFieldDeclaration($collation)
+    {
+        return 'COLLATE '.$collation;
+    }
+
+    // }}}
+    // {{{ getTypeDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an text type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param array $field  associative array with the name of the properties
+     *      of the field being declared as array indexes. Currently, the types
+     *      of supported field properties are as follows:
+     *
+     *      length
+     *          Integer value that determines the maximum length of the text
+     *          field. If this argument is missing the field should be
+     *          declared to have the longest length allowed by the DBMS.
+     *
+     *      default
+     *          Text value to be used as default for this field.
+     *
+     *      notnull
+     *          Boolean flag that indicates whether this field is constrained
+     *          to not be set to null.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *      declare the specified field.
+     * @access public
+     */
+    function getTypeDeclaration($field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        switch ($field['type']) {
+        case 'text':
+            $length = !empty($field['length'])
+                ? $field['length'] : false;
+            $fixed = !empty($field['fixed']) ? $field['fixed'] : false;
+            return $fixed ? ($length ? 'CHAR('.$length.')' : 'CHAR('.$db->options['default_text_field_length'].')')
+                : ($length ? 'VARCHAR('.$length.')' : 'TEXT');
+        case 'clob':
+            if (!empty($field['length'])) {
+                $length = $field['length'];
+                if ($length <= 255) {
+                    return 'TINYTEXT';
+                } elseif ($length <= 65532) {
+                    return 'TEXT';
+                } elseif ($length <= 16777215) {
+                    return 'MEDIUMTEXT';
+                }
+            }
+            return 'LONGTEXT';
+        case 'blob':
+            if (!empty($field['length'])) {
+                $length = $field['length'];
+                if ($length <= 255) {
+                    return 'TINYBLOB';
+                } elseif ($length <= 65532) {
+                    return 'BLOB';
+                } elseif ($length <= 16777215) {
+                    return 'MEDIUMBLOB';
+                }
+            }
+            return 'LONGBLOB';
+        case 'integer':
+            if (!empty($field['length'])) {
+                $length = $field['length'];
+                if ($length <= 2) {
+                    return 'SMALLINT';
+                } elseif ($length == 3 || $length == 4) {
+                    return 'INTEGER';
+                } elseif ($length > 4) {
+                    return 'BIGINT';
+                }
+            }
+            return 'INTEGER';
+        case 'boolean':
+            return 'BOOLEAN';
+        case 'date':
+            return 'DATE';
+        case 'time':
+            return 'TIME';
+        case 'timestamp':
+            return 'DATETIME';
+        case 'float':
+            return 'DOUBLE'.($db->options['fixed_float'] ? '('.
+                ($db->options['fixed_float']+2).','.$db->options['fixed_float'].')' : '');
+        case 'decimal':
+            $length = !empty($field['length']) ? $field['length'] : 18;
+            $scale = !empty($field['scale']) ? $field['scale'] : $db->options['decimal_places'];
+            return 'DECIMAL('.$length.','.$scale.')';
+        }
+        return '';
+    }
+
+    // }}}
+    // {{{ _getIntegerDeclaration()
+
+    /**
+     * Obtain DBMS specific SQL code portion needed to declare an integer type
+     * field to be used in statements like CREATE TABLE.
+     *
+     * @param string  $name   name the field to be declared.
+     * @param string  $field  associative array with the name of the properties
+     *                        of the field being declared as array indexes.
+     *                        Currently, the types of supported field
+     *                        properties are as follows:
+     *
+     *                       unsigned
+     *                        Boolean flag that indicates whether the field
+     *                        should be declared as unsigned integer if
+     *                        possible.
+     *
+     *                       default
+     *                        Integer value to be used as default for this
+     *                        field.
+     *
+     *                       notnull
+     *                        Boolean flag that indicates whether this field is
+     *                        constrained to not be set to null.
+     * @return string  DBMS specific SQL code portion that should be used to
+     *                 declare the specified field.
+     * @access protected
+     */
+    function _getIntegerDeclaration($name, $field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $default = $autoinc = '';
+        if (!empty($field['autoincrement'])) {
+            $autoinc = ' PRIMARY KEY';
+        } elseif (array_key_exists('default', $field)) {
+            if ($field['default'] === '') {
+                $field['default'] = empty($field['notnull']) ? null : 0;
+            }
+            $default = ' DEFAULT '.$this->quote($field['default'], 'integer');
+        }
+
+        $notnull = empty($field['notnull']) ? '' : ' NOT NULL';
+        $unsigned = empty($field['unsigned']) ? '' : ' UNSIGNED';
+        $name = $db->quoteIdentifier($name, true);
+        return $name.' '.$this->getTypeDeclaration($field).$unsigned.$default.$notnull.$autoinc;
+    }
+
+    // }}}
+    // {{{ matchPattern()
+
+    /**
+     * build a pattern matching string
+     *
+     * @access public
+     *
+     * @param array $pattern even keys are strings, odd are patterns (% and _)
+     * @param string $operator optional pattern operator (LIKE, ILIKE and maybe others in the future)
+     * @param string $field optional field name that is being matched against
+     *                  (might be required when emulating ILIKE)
+     *
+     * @return string SQL pattern
+     */
+    function matchPattern($pattern, $operator = null, $field = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $match = '';
+        if (!is_null($operator)) {
+            $field = is_null($field) ? '' : $field.' ';
+            $operator = strtoupper($operator);
+            switch ($operator) {
+            // case insensitive
+            case 'ILIKE':
+                $match = $field.'LIKE ';
+                break;
+            // case sensitive
+            case 'LIKE':
+                $match = $field.'LIKE ';
+                break;
+            default:
+                return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'not a supported operator type:'. $operator, __FUNCTION__);
+            }
+        }
+        $match.= "'";
+        foreach ($pattern as $key => $value) {
+            if ($key % 2) {
+                $match.= $value;
+            } else {
+                $match.= $db->escapePattern($db->escape($value));
+            }
+        }
+        $match.= "'";
+        $match.= $this->patternEscapeString();
+        return $match;
+    }
+
+    // }}}
+    // {{{ _mapNativeDatatype()
+
+    /**
+     * Maps a native array description of a field to a MDB2 datatype and length
+     *
+     * @param array  $field native field description
+     * @return array containing the various possible types, length, sign, fixed
+     * @access public
+     */
+    function _mapNativeDatatype($field)
+    {
+        $db_type = strtolower($field['type']);
+        $length = !empty($field['length']) ? $field['length'] : null;
+        $unsigned = !empty($field['unsigned']) ? $field['unsigned'] : null;
+        $fixed = null;
+        $type = array();
+        switch ($db_type) {
+        case 'boolean':
+            $type[] = 'boolean';
+            break;
+        case 'tinyint':
+            $type[] = 'integer';
+            $type[] = 'boolean';
+            if (preg_match('/^(is|has)/', $field['name'])) {
+                $type = array_reverse($type);
+            }
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 1;
+            break;
+        case 'smallint':
+            $type[] = 'integer';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 2;
+            break;
+        case 'mediumint':
+            $type[] = 'integer';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 3;
+            break;
+        case 'int':
+        case 'integer':
+        case 'serial':
+            $type[] = 'integer';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 4;
+            break;
+        case 'bigint':
+        case 'bigserial':
+            $type[] = 'integer';
+            $unsigned = preg_match('/ unsigned/i', $field['type']);
+            $length = 8;
+            break;
+        case 'clob':
+            $type[] = 'clob';
+            $fixed  = false;
+            break;
+        case 'tinytext':
+        case 'mediumtext':
+        case 'longtext':
+        case 'text':
+        case 'varchar':
+        case 'varchar2':
+            $fixed = false;
+        case 'char':
+            $type[] = 'text';
+            if ($length == '1') {
+                $type[] = 'boolean';
+                if (preg_match('/^(is|has)/', $field['name'])) {
+                    $type = array_reverse($type);
+                }
+            } elseif (strstr($db_type, 'text')) {
+                $type[] = 'clob';
+                $type = array_reverse($type);
+            }
+            if ($fixed !== false) {
+                $fixed = true;
+            }
+            break;
+        case 'date':
+            $type[] = 'date';
+            $length = null;
+            break;
+        case 'datetime':
+        case 'timestamp':
+            $type[] = 'timestamp';
+            $length = null;
+            break;
+        case 'time':
+            $type[] = 'time';
+            $length = null;
+            break;
+        case 'float':
+        case 'double':
+        case 'real':
+            $type[] = 'float';
+            break;
+        case 'decimal':
+        case 'numeric':
+            $type[] = 'decimal';
+            $length = $length.','.$field['decimal'];
+            break;
+        case 'tinyblob':
+        case 'mediumblob':
+        case 'longblob':
+        case 'blob':
+            $type[] = 'blob';
+            $length = null;
+            break;
+        case 'year':
+            $type[] = 'integer';
+            $type[] = 'date';
+            $length = null;
+            break;
+        default:
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+            return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'unknown database attribute type: '.$db_type, __FUNCTION__);
+        }
+
+        if ((int)$length <= 0) {
+            $length = null;
+        }
+
+        return array($type, $length, $unsigned, $fixed);
+    }
+
+    // }}}
+}
+
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Function/Common.php b/inc/MDB2/Driver/Function/Common.php
new file mode 100755
index 00000000000..731f06882ce
--- /dev/null
+++ b/inc/MDB2/Driver/Function/Common.php
@@ -0,0 +1,293 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: Common.php,v 1.21 2008/02/17 18:51:39 quipo Exp $
+//
+
+/**
+ * @package  MDB2
+ * @category Database
+ * @author   Lukas Smith <smith@pooteeweet.org>
+ */
+
+/**
+ * Base class for the function modules that is extended by each MDB2 driver
+ *
+ * To load this module in the MDB2 object:
+ * $mdb->loadModule('Function');
+ *
+ * @package  MDB2
+ * @category Database
+ * @author   Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Function_Common extends MDB2_Module_Common
+{
+    // {{{ executeStoredProc()
+
+    /**
+     * Execute a stored procedure and return any results
+     *
+     * @param string $name string that identifies the function to execute
+     * @param mixed  $params  array that contains the paramaters to pass the stored proc
+     * @param mixed   $types  array that contains the types of the columns in
+     *                        the result set
+     * @param mixed $result_class string which specifies which result class to use
+     * @param mixed $result_wrap_class string which specifies which class to wrap results in
+     *
+     * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function &executeStoredProc($name, $params = null, $types = null, $result_class = true, $result_wrap_class = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $error =& $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+        return $error;
+    }
+
+    // }}}
+    // {{{ functionTable()
+
+    /**
+     * return string for internal table used when calling only a function
+     *
+     * @return string for internal table used when calling only a function
+     * @access public
+     */
+    function functionTable()
+    {
+        return '';
+    }
+
+    // }}}
+    // {{{ now()
+
+    /**
+     * Return string to call a variable with the current timestamp inside an SQL statement
+     * There are three special variables for current date and time:
+     * - CURRENT_TIMESTAMP (date and time, TIMESTAMP type)
+     * - CURRENT_DATE (date, DATE type)
+     * - CURRENT_TIME (time, TIME type)
+     *
+     * @param string $type 'timestamp' | 'time' | 'date'
+     *
+     * @return string to call a variable with the current timestamp
+     * @access public
+     */
+    function now($type = 'timestamp')
+    {
+        switch ($type) {
+        case 'time':
+            return 'CURRENT_TIME';
+        case 'date':
+            return 'CURRENT_DATE';
+        case 'timestamp':
+        default:
+            return 'CURRENT_TIMESTAMP';
+        }
+    }
+
+    // }}}
+    // {{{ unixtimestamp()
+
+    /**
+     * return string to call a function to get the unix timestamp from a iso timestamp
+     *
+     * @param string $expression
+     *
+     * @return string to call a variable with the timestamp
+     * @access public
+     */
+    function unixtimestamp($expression)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $error =& $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+        return $error;
+    }
+
+    // }}}
+    // {{{ substring()
+
+    /**
+     * return string to call a function to get a substring inside an SQL statement
+     *
+     * @return string to call a function to get a substring
+     * @access public
+     */
+    function substring($value, $position = 1, $length = null)
+    {
+        if (!is_null($length)) {
+            return "SUBSTRING($value FROM $position FOR $length)";
+        }
+        return "SUBSTRING($value FROM $position)";
+    }
+
+    // }}}
+    // {{{ replace()
+
+    /**
+     * return string to call a function to get replace inside an SQL statement.
+     *
+     * @return string to call a function to get a replace
+     * @access public
+     */
+    function replace($str, $from_str, $to_str)
+    {
+        return "REPLACE($str, $from_str , $to_str)";
+    }
+
+    // }}}
+    // {{{ concat()
+
+    /**
+     * Returns string to concatenate two or more string parameters
+     *
+     * @param string $value1
+     * @param string $value2
+     * @param string $values...
+     *
+     * @return string to concatenate two strings
+     * @access public
+     */
+    function concat($value1, $value2)
+    {
+        $args = func_get_args();
+        return "(".implode(' || ', $args).")";
+    }
+
+    // }}}
+    // {{{ random()
+
+    /**
+     * return string to call a function to get random value inside an SQL statement
+     *
+     * @return return string to generate float between 0 and 1
+     * @access public
+     */
+    function random()
+    {
+        return 'RAND()';
+    }
+
+    // }}}
+    // {{{ lower()
+
+    /**
+     * return string to call a function to lower the case of an expression
+     *
+     * @param string $expression
+     *
+     * @return return string to lower case of an expression
+     * @access public
+     */
+    function lower($expression)
+    {
+        return "LOWER($expression)";
+    }
+
+    // }}}
+    // {{{ upper()
+
+    /**
+     * return string to call a function to upper the case of an expression
+     *
+     * @param string $expression
+     *
+     * @return return string to upper case of an expression
+     * @access public
+     */
+    function upper($expression)
+    {
+        return "UPPER($expression)";
+    }
+
+    // }}}
+    // {{{ length()
+
+    /**
+     * return string to call a function to get the length of a string expression
+     *
+     * @param string $expression
+     *
+     * @return return string to get the string expression length
+     * @access public
+     */
+    function length($expression)
+    {
+        return "LENGTH($expression)";
+    }
+
+    // }}}
+    // {{{ guid()
+
+    /**
+     * Returns global unique identifier
+     *
+     * @return string to get global unique identifier
+     * @access public
+     */
+    function guid()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $error =& $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+        return $error;
+    }
+
+    // }}}
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Function/mysql.php b/inc/MDB2/Driver/Function/mysql.php
new file mode 100755
index 00000000000..b405c3ec02e
--- /dev/null
+++ b/inc/MDB2/Driver/Function/mysql.php
@@ -0,0 +1,136 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: mysql.php,v 1.12 2008/02/17 18:54:08 quipo Exp $
+//
+
+require_once 'MDB2/Driver/Function/Common.php';
+
+/**
+ * MDB2 MySQL driver for the function modules
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Function_mysql extends MDB2_Driver_Function_Common
+{
+     // }}}
+    // {{{ executeStoredProc()
+
+    /**
+     * Execute a stored procedure and return any results
+     *
+     * @param string $name string that identifies the function to execute
+     * @param mixed  $params  array that contains the paramaters to pass the stored proc
+     * @param mixed   $types  array that contains the types of the columns in
+     *                        the result set
+     * @param mixed $result_class string which specifies which result class to use
+     * @param mixed $result_wrap_class string which specifies which class to wrap results in
+     * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function &executeStoredProc($name, $params = null, $types = null, $result_class = true, $result_wrap_class = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'CALL '.$name;
+        $query .= $params ? '('.implode(', ', $params).')' : '()';
+        return $db->query($query, $types, $result_class, $result_wrap_class);
+    }
+
+    // }}}
+    // {{{ unixtimestamp()
+
+    /**
+     * return string to call a function to get the unix timestamp from a iso timestamp
+     *
+     * @param string $expression
+     *
+     * @return string to call a variable with the timestamp
+     * @access public
+     */
+    function unixtimestamp($expression)
+    {
+        return 'UNIX_TIMESTAMP('. $expression.')';
+    }
+
+    // }}}
+    // {{{ concat()
+
+    /**
+     * Returns string to concatenate two or more string parameters
+     *
+     * @param string $value1
+     * @param string $value2
+     * @param string $values...
+     * @return string to concatenate two strings
+     * @access public
+     **/
+    function concat($value1, $value2)
+    {
+        $args = func_get_args();
+        return "CONCAT(".implode(', ', $args).")";
+    }
+
+    // }}}
+    // {{{ guid()
+
+    /**
+     * Returns global unique identifier
+     *
+     * @return string to get global unique identifier
+     * @access public
+     */
+    function guid()
+    {
+        return 'UUID()';
+    }
+
+    // }}}
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Function/pgsql.php b/inc/MDB2/Driver/Function/pgsql.php
new file mode 100755
index 00000000000..99bb238082a
--- /dev/null
+++ b/inc/MDB2/Driver/Function/pgsql.php
@@ -0,0 +1,115 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Paul Cooper <pgc@ucecom.com>                                 |
+// +----------------------------------------------------------------------+
+//
+// $Id: pgsql.php,v 1.11 2008/11/09 19:46:50 quipo Exp $
+
+require_once 'MDB2/Driver/Function/Common.php';
+
+/**
+ * MDB2 MySQL driver for the function modules
+ *
+ * @package MDB2
+ * @category Database
+ * @author Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Function_pgsql extends MDB2_Driver_Function_Common
+{
+    // {{{ executeStoredProc()
+
+    /**
+     * Execute a stored procedure and return any results
+     *
+     * @param string $name string that identifies the function to execute
+     * @param mixed  $params  array that contains the paramaters to pass the stored proc
+     * @param mixed   $types  array that contains the types of the columns in
+     *                        the result set
+     * @param mixed $result_class string which specifies which result class to use
+     * @param mixed $result_wrap_class string which specifies which class to wrap results in
+     * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function &executeStoredProc($name, $params = null, $types = null, $result_class = true, $result_wrap_class = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'SELECT * FROM '.$name;
+        $query .= $params ? '('.implode(', ', $params).')' : '()';
+        return $db->query($query, $types, $result_class, $result_wrap_class);
+    }
+    // }}}
+    // {{{ unixtimestamp()
+
+    /**
+     * return string to call a function to get the unix timestamp from a iso timestamp
+     *
+     * @param string $expression
+     *
+     * @return string to call a variable with the timestamp
+     * @access public
+     */
+    function unixtimestamp($expression)
+    {
+        return 'EXTRACT(EPOCH FROM DATE_TRUNC(\'seconds\', CAST ((' . $expression . ') AS TIMESTAMP)))';
+    }
+
+    // }}}
+    // {{{ random()
+
+    /**
+     * return string to call a function to get random value inside an SQL statement
+     *
+     * @return return string to generate float between 0 and 1
+     * @access public
+     */
+    function random()
+    {
+        return 'RANDOM()';
+    }
+
+    // }}}
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Function/sqlite.php b/inc/MDB2/Driver/Function/sqlite.php
new file mode 100755
index 00000000000..05fac65baf0
--- /dev/null
+++ b/inc/MDB2/Driver/Function/sqlite.php
@@ -0,0 +1,162 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: sqlite.php,v 1.10 2008/02/17 18:54:08 quipo Exp $
+//
+
+require_once 'MDB2/Driver/Function/Common.php';
+
+/**
+ * MDB2 SQLite driver for the function modules
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Function_sqlite extends MDB2_Driver_Function_Common
+{
+    // {{{ constructor
+
+    /**
+     * Constructor
+     */
+    function __construct($db_index)
+    {
+        parent::__construct($db_index);
+        // create all sorts of UDFs
+    }
+
+    // {{{ now()
+
+    /**
+     * Return string to call a variable with the current timestamp inside an SQL statement
+     * There are three special variables for current date and time.
+     *
+     * @return string to call a variable with the current timestamp
+     * @access public
+     */
+    function now($type = 'timestamp')
+    {
+        switch ($type) {
+        case 'time':
+            return 'time(\'now\')';
+        case 'date':
+            return 'date(\'now\')';
+        case 'timestamp':
+        default:
+            return 'datetime(\'now\')';
+        }
+    }
+
+    // }}}
+    // {{{ unixtimestamp()
+
+    /**
+     * return string to call a function to get the unix timestamp from a iso timestamp
+     *
+     * @param string $expression
+     *
+     * @return string to call a variable with the timestamp
+     * @access public
+     */
+    function unixtimestamp($expression)
+    {
+        return 'strftime("%s",'. $expression.', "utc")';
+    }
+
+    // }}}
+    // {{{ substring()
+
+    /**
+     * return string to call a function to get a substring inside an SQL statement
+     *
+     * @return string to call a function to get a substring
+     * @access public
+     */
+    function substring($value, $position = 1, $length = null)
+    {
+        if (!is_null($length)) {
+            return "substr($value,$position,$length)";
+        }
+        return "substr($value,$position,length($value))";
+    }
+
+    // }}}
+    // {{{ random()
+
+    /**
+     * return string to call a function to get random value inside an SQL statement
+     *
+     * @return return string to generate float between 0 and 1
+     * @access public
+     */
+    function random()
+    {
+        return '((RANDOM()+2147483648)/4294967296)';
+    }
+
+    // }}}
+    // {{{ replace()
+
+    /**
+     * return string to call a function to get a replacement inside an SQL statement.
+     *
+     * @return string to call a function to get a replace
+     * @access public
+     */
+    function replace($str, $from_str, $to_str)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $error =& $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+        return $error;
+    }
+
+    // }}}
+}
+?>
diff --git a/inc/MDB2/Driver/Manager/Common.php b/inc/MDB2/Driver/Manager/Common.php
new file mode 100755
index 00000000000..dd3d545e6cb
--- /dev/null
+++ b/inc/MDB2/Driver/Manager/Common.php
@@ -0,0 +1,1014 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Authors: Lukas Smith <smith@pooteeweet.org>                          |
+// |          Lorenzo Alberton <l.alberton@quipo.it>                      |
+// +----------------------------------------------------------------------+
+//
+// $Id: Common.php,v 1.72 2009/01/14 15:00:40 quipo Exp $
+//
+
+/**
+ * @package  MDB2
+ * @category Database
+ * @author   Lukas Smith <smith@pooteeweet.org>
+ * @author   Lorenzo Alberton <l.alberton@quipo.it>
+ */
+
+/**
+ * Base class for the management modules that is extended by each MDB2 driver
+ *
+ * To load this module in the MDB2 object:
+ * $mdb->loadModule('Manager');
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Manager_Common extends MDB2_Module_Common
+{
+    // {{{ splitTableSchema()
+
+    /**
+     * Split the "[owner|schema].table" notation into an array
+     *
+     * @param string $table [schema and] table name
+     *
+     * @return array array(schema, table)
+     * @access private
+     */
+    function splitTableSchema($table)
+    {
+        $ret = array();
+        if (strpos($table, '.') !== false) {
+            return explode('.', $table);
+        }
+        return array(null, $table);
+    }
+
+    // }}}
+    // {{{ getFieldDeclarationList()
+
+    /**
+     * Get declaration of a number of field in bulk
+     *
+     * @param array $fields  a multidimensional associative array.
+     *      The first dimension determines the field name, while the second
+     *      dimension is keyed with the name of the properties
+     *      of the field being declared as array indexes. Currently, the types
+     *      of supported field properties are as follows:
+     *
+     *      default
+     *          Boolean value to be used as default for this field.
+     *
+     *      notnull
+     *          Boolean flag that indicates whether this field is constrained
+     *          to not be set to null.
+     *
+     * @return mixed string on success, a MDB2 error on failure
+     * @access public
+     */
+    function getFieldDeclarationList($fields)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (!is_array($fields) || empty($fields)) {
+            return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'missing any fields', __FUNCTION__);
+        }
+        foreach ($fields as $field_name => $field) {
+            $query = $db->getDeclaration($field['type'], $field_name, $field);
+            if (PEAR::isError($query)) {
+                return $query;
+            }
+            $query_fields[] = $query;
+        }
+        return implode(', ', $query_fields);
+    }
+
+    // }}}
+    // {{{ _fixSequenceName()
+
+    /**
+     * Removes any formatting in an sequence name using the 'seqname_format' option
+     *
+     * @param string $sqn string that containts name of a potential sequence
+     * @param bool $check if only formatted sequences should be returned
+     * @return string name of the sequence with possible formatting removed
+     * @access protected
+     */
+    function _fixSequenceName($sqn, $check = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $seq_pattern = '/^'.preg_replace('/%s/', '([a-z0-9_]+)', $db->options['seqname_format']).'$/i';
+        $seq_name = preg_replace($seq_pattern, '\\1', $sqn);
+        if ($seq_name && !strcasecmp($sqn, $db->getSequenceName($seq_name))) {
+            return $seq_name;
+        }
+        if ($check) {
+            return false;
+        }
+        return $sqn;
+    }
+
+    // }}}
+    // {{{ _fixIndexName()
+
+    /**
+     * Removes any formatting in an index name using the 'idxname_format' option
+     *
+     * @param string $idx string that containts name of anl index
+     * @return string name of the index with eventual formatting removed
+     * @access protected
+     */
+    function _fixIndexName($idx)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $idx_pattern = '/^'.preg_replace('/%s/', '([a-z0-9_]+)', $db->options['idxname_format']).'$/i';
+        $idx_name = preg_replace($idx_pattern, '\\1', $idx);
+        if ($idx_name && !strcasecmp($idx, $db->getIndexName($idx_name))) {
+            return $idx_name;
+        }
+        return $idx;
+    }
+
+    // }}}
+    // {{{ createDatabase()
+
+    /**
+     * create a new database
+     *
+     * @param string $name    name of the database that should be created
+     * @param array  $options array with charset, collation info
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createDatabase($database, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ alterDatabase()
+
+    /**
+     * alter an existing database
+     *
+     * @param string $name    name of the database that should be created
+     * @param array  $options array with charset, collation info
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function alterDatabase($database, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ dropDatabase()
+
+    /**
+     * drop an existing database
+     *
+     * @param string $name name of the database that should be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropDatabase($database)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ _getCreateTableQuery()
+
+    /**
+     * Create a basic SQL query for a new table creation
+     *
+     * @param string $name    Name of the database that should be created
+     * @param array  $fields  Associative array that contains the definition of each field of the new table
+     * @param array  $options An associative array of table options
+     *
+     * @return mixed string (the SQL query) on success, a MDB2 error on failure
+     * @see createTable()
+     */
+    function _getCreateTableQuery($name, $fields, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (!$name) {
+            return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
+                'no valid table name specified', __FUNCTION__);
+        }
+        if (empty($fields)) {
+            return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
+                'no fields specified for table "'.$name.'"', __FUNCTION__);
+        }
+        $query_fields = $this->getFieldDeclarationList($fields);
+        if (PEAR::isError($query_fields)) {
+            return $query_fields;
+        }
+        if (!empty($options['primary'])) {
+            $query_fields.= ', PRIMARY KEY ('.implode(', ', array_keys($options['primary'])).')';
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        $result = 'CREATE ';
+        if (!empty($options['temporary'])) {
+            $result .= $this->_getTemporaryTableQuery();
+        }
+        $result .= " TABLE $name ($query_fields)";
+        return $result;
+    }
+
+    // }}}
+    // {{{ _getTemporaryTableQuery()
+
+    /**
+     * A method to return the required SQL string that fits between CREATE ... TABLE
+     * to create the table as a temporary table.
+     *
+     * Should be overridden in driver classes to return the correct string for the
+     * specific database type.
+     *
+     * The default is to return the string "TEMPORARY" - this will result in a
+     * SQL error for any database that does not support temporary tables, or that
+     * requires a different SQL command from "CREATE TEMPORARY TABLE".
+     *
+     * @return string The string required to be placed between "CREATE" and "TABLE"
+     *                to generate a temporary table, if possible.
+     */
+    function _getTemporaryTableQuery()
+    {
+        return 'TEMPORARY';
+    }
+
+    // }}}
+    // {{{ createTable()
+
+    /**
+     * create a new table
+     *
+     * @param string $name   Name of the database that should be created
+     * @param array $fields  Associative array that contains the definition of each field of the new table
+     *                       The indexes of the array entries are the names of the fields of the table an
+     *                       the array entry values are associative arrays like those that are meant to be
+     *                       passed with the field definitions to get[Type]Declaration() functions.
+     *                          array(
+     *                              'id' => array(
+     *                                  'type' => 'integer',
+     *                                  'unsigned' => 1
+     *                                  'notnull' => 1
+     *                                  'default' => 0
+     *                              ),
+     *                              'name' => array(
+     *                                  'type' => 'text',
+     *                                  'length' => 12
+     *                              ),
+     *                              'password' => array(
+     *                                  'type' => 'text',
+     *                                  'length' => 12
+     *                              )
+     *                          );
+     * @param array $options  An associative array of table options:
+     *                          array(
+     *                              'comment' => 'Foo',
+     *                              'temporary' => true|false,
+     *                          );
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createTable($name, $fields, $options = array())
+    {
+        $query = $this->_getCreateTableQuery($name, $fields, $options);
+        if (PEAR::isError($query)) {
+            return $query;
+        }
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        $result = $db->exec($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ dropTable()
+
+    /**
+     * drop an existing table
+     *
+     * @param string $name name of the table that should be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropTable($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        return $db->exec("DROP TABLE $name");
+    }
+
+    // }}}
+    // {{{ truncateTable()
+
+    /**
+     * Truncate an existing table (if the TRUNCATE TABLE syntax is not supported,
+     * it falls back to a DELETE FROM TABLE query)
+     *
+     * @param string $name name of the table that should be truncated
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function truncateTable($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        return $db->exec("DELETE FROM $name");
+    }
+
+    // }}}
+    // {{{ vacuum()
+
+    /**
+     * Optimize (vacuum) all the tables in the db (or only the specified table)
+     * and optionally run ANALYZE.
+     *
+     * @param string $table table name (all the tables if empty)
+     * @param array  $options an array with driver-specific options:
+     *               - timeout [int] (in seconds) [mssql-only]
+     *               - analyze [boolean] [pgsql and mysql]
+     *               - full [boolean] [pgsql-only]
+     *               - freeze [boolean] [pgsql-only]
+     *
+     * @return mixed MDB2_OK success, a MDB2 error on failure
+     * @access public
+     */
+    function vacuum($table = null, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ alterTable()
+
+    /**
+     * alter an existing table
+     *
+     * @param string $name         name of the table that is intended to be changed.
+     * @param array $changes     associative array that contains the details of each type
+     *                             of change that is intended to be performed. The types of
+     *                             changes that are currently supported are defined as follows:
+     *
+     *                             name
+     *
+     *                                New name for the table.
+     *
+     *                            add
+     *
+     *                                Associative array with the names of fields to be added as
+     *                                 indexes of the array. The value of each entry of the array
+     *                                 should be set to another associative array with the properties
+     *                                 of the fields to be added. The properties of the fields should
+     *                                 be the same as defined by the MDB2 parser.
+     *
+     *
+     *                            remove
+     *
+     *                                Associative array with the names of fields to be removed as indexes
+     *                                 of the array. Currently the values assigned to each entry are ignored.
+     *                                 An empty array should be used for future compatibility.
+     *
+     *                            rename
+     *
+     *                                Associative array with the names of fields to be renamed as indexes
+     *                                 of the array. The value of each entry of the array should be set to
+     *                                 another associative array with the entry named name with the new
+     *                                 field name and the entry named Declaration that is expected to contain
+     *                                 the portion of the field declaration already in DBMS specific SQL code
+     *                                 as it is used in the CREATE TABLE statement.
+     *
+     *                            change
+     *
+     *                                Associative array with the names of the fields to be changed as indexes
+     *                                 of the array. Keep in mind that if it is intended to change either the
+     *                                 name of a field and any other properties, the change array entries
+     *                                 should have the new names of the fields as array indexes.
+     *
+     *                                The value of each entry of the array should be set to another associative
+     *                                 array with the properties of the fields to that are meant to be changed as
+     *                                 array entries. These entries should be assigned to the new values of the
+     *                                 respective properties. The properties of the fields should be the same
+     *                                 as defined by the MDB2 parser.
+     *
+     *                            Example
+     *                                array(
+     *                                    'name' => 'userlist',
+     *                                    'add' => array(
+     *                                        'quota' => array(
+     *                                            'type' => 'integer',
+     *                                            'unsigned' => 1
+     *                                        )
+     *                                    ),
+     *                                    'remove' => array(
+     *                                        'file_limit' => array(),
+     *                                        'time_limit' => array()
+     *                                    ),
+     *                                    'change' => array(
+     *                                        'name' => array(
+     *                                            'length' => '20',
+     *                                            'definition' => array(
+     *                                                'type' => 'text',
+     *                                                'length' => 20,
+     *                                            ),
+     *                                        )
+     *                                    ),
+     *                                    'rename' => array(
+     *                                        'sex' => array(
+     *                                            'name' => 'gender',
+     *                                            'definition' => array(
+     *                                                'type' => 'text',
+     *                                                'length' => 1,
+     *                                                'default' => 'M',
+     *                                            ),
+     *                                        )
+     *                                    )
+     *                                )
+     *
+     * @param boolean $check     indicates whether the function should just check if the DBMS driver
+     *                             can perform the requested table alterations if the value is true or
+     *                             actually perform them otherwise.
+     * @access public
+     *
+      * @return mixed MDB2_OK on success, a MDB2 error on failure
+     */
+    function alterTable($name, $changes, $check)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listDatabases()
+
+    /**
+     * list all databases
+     *
+     * @return mixed array of database names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listDatabases()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implementedd', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listUsers()
+
+    /**
+     * list all users
+     *
+     * @return mixed array of user names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listUsers()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listViews()
+
+    /**
+     * list all views in the current database
+     *
+     * @param string database, the current is default
+     *               NB: not all the drivers can get the view names from
+     *               a database other than the current one
+     * @return mixed array of view names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listViews($database = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listTableViews()
+
+    /**
+     * list the views in the database that reference a given table
+     *
+     * @param string table for which all referenced views should be found
+     * @return mixed array of view names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableViews($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listTableTriggers()
+
+    /**
+     * list all triggers in the database that reference a given table
+     *
+     * @param string table for which all referenced triggers should be found
+     * @return mixed array of trigger names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableTriggers($table = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listFunctions()
+
+    /**
+     * list all functions in the current database
+     *
+     * @return mixed array of function names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listFunctions()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listTables()
+
+    /**
+     * list all tables in the current database
+     *
+     * @param string database, the current is default.
+     *               NB: not all the drivers can get the table names from
+     *               a database other than the current one
+     * @return mixed array of table names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTables($database = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listTableFields()
+
+    /**
+     * list all fields in a table in the current database
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of field names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableFields($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ createIndex()
+
+    /**
+     * Get the stucture of a field into an array
+     *
+     * @param string    $table         name of the table on which the index is to be created
+     * @param string    $name         name of the index to be created
+     * @param array     $definition        associative array that defines properties of the index to be created.
+     *                                 Currently, only one property named FIELDS is supported. This property
+     *                                 is also an associative with the names of the index fields as array
+     *                                 indexes. Each entry of this array is set to another type of associative
+     *                                 array that specifies properties of the index that are specific to
+     *                                 each field.
+     *
+     *                                Currently, only the sorting property is supported. It should be used
+     *                                 to define the sorting direction of the index. It may be set to either
+     *                                 ascending or descending.
+     *
+     *                                Not all DBMS support index sorting direction configuration. The DBMS
+     *                                 drivers of those that do not support it ignore this property. Use the
+     *                                 function supports() to determine whether the DBMS driver can manage indexes.
+     *
+     *                                 Example
+     *                                    array(
+     *                                        'fields' => array(
+     *                                            'user_name' => array(
+     *                                                'sorting' => 'ascending'
+     *                                            ),
+     *                                            'last_login' => array()
+     *                                        )
+     *                                    )
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createIndex($table, $name, $definition)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $table = $db->quoteIdentifier($table, true);
+        $name = $db->quoteIdentifier($db->getIndexName($name), true);
+        $query = "CREATE INDEX $name ON $table";
+        $fields = array();
+        foreach (array_keys($definition['fields']) as $field) {
+            $fields[] = $db->quoteIdentifier($field, true);
+        }
+        $query .= ' ('. implode(', ', $fields) . ')';
+        return $db->exec($query);
+    }
+
+    // }}}
+    // {{{ dropIndex()
+
+    /**
+     * drop existing index
+     *
+     * @param string    $table         name of table that should be used in method
+     * @param string    $name         name of the index to be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropIndex($table, $name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name = $db->quoteIdentifier($db->getIndexName($name), true);
+        return $db->exec("DROP INDEX $name");
+    }
+
+    // }}}
+    // {{{ listTableIndexes()
+
+    /**
+     * list all indexes in a table
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of index names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableIndexes($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ _getAdvancedFKOptions()
+
+    /**
+     * Return the FOREIGN KEY query section dealing with non-standard options
+     * as MATCH, INITIALLY DEFERRED, ON UPDATE, ...
+     *
+     * @param array $definition
+     * @return string
+     * @access protected
+     */
+    function _getAdvancedFKOptions($definition)
+    {
+        return '';
+    }
+
+    // }}}
+    // {{{ createConstraint()
+
+    /**
+     * create a constraint on a table
+     *
+     * @param string    $table       name of the table on which the constraint is to be created
+     * @param string    $name        name of the constraint to be created
+     * @param array     $definition  associative array that defines properties of the constraint to be created.
+     *                               The full structure of the array looks like this:
+     *          <pre>
+     *          array (
+     *              [primary] => 0
+     *              [unique]  => 0
+     *              [foreign] => 1
+     *              [check]   => 0
+     *              [fields] => array (
+     *                  [field1name] => array() // one entry per each field covered
+     *                  [field2name] => array() // by the index
+     *                  [field3name] => array(
+     *                      [sorting]  => ascending
+     *                      [position] => 3
+     *                  )
+     *              )
+     *              [references] => array(
+     *                  [table] => name
+     *                  [fields] => array(
+     *                      [field1name] => array(  //one entry per each referenced field
+     *                           [position] => 1
+     *                      )
+     *                  )
+     *              )
+     *              [deferrable] => 0
+     *              [initiallydeferred] => 0
+     *              [onupdate] => CASCADE|RESTRICT|SET NULL|SET DEFAULT|NO ACTION
+     *              [ondelete] => CASCADE|RESTRICT|SET NULL|SET DEFAULT|NO ACTION
+     *              [match] => SIMPLE|PARTIAL|FULL
+     *          );
+     *          </pre>
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createConstraint($table, $name, $definition)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        $table = $db->quoteIdentifier($table, true);
+        $name = $db->quoteIdentifier($db->getIndexName($name), true);
+        $query = "ALTER TABLE $table ADD CONSTRAINT $name";
+        if (!empty($definition['primary'])) {
+            $query.= ' PRIMARY KEY';
+        } elseif (!empty($definition['unique'])) {
+            $query.= ' UNIQUE';
+        } elseif (!empty($definition['foreign'])) {
+            $query.= ' FOREIGN KEY';
+        }
+        $fields = array();
+        foreach (array_keys($definition['fields']) as $field) {
+            $fields[] = $db->quoteIdentifier($field, true);
+        }
+        $query .= ' ('. implode(', ', $fields) . ')';
+        if (!empty($definition['foreign'])) {
+            $query.= ' REFERENCES ' . $db->quoteIdentifier($definition['references']['table'], true);
+            $referenced_fields = array();
+            foreach (array_keys($definition['references']['fields']) as $field) {
+                $referenced_fields[] = $db->quoteIdentifier($field, true);
+            }
+            $query .= ' ('. implode(', ', $referenced_fields) . ')';
+            $query .= $this->_getAdvancedFKOptions($definition);
+        }
+        return $db->exec($query);
+    }
+
+    // }}}
+    // {{{ dropConstraint()
+
+    /**
+     * drop existing constraint
+     *
+     * @param string    $table        name of table that should be used in method
+     * @param string    $name         name of the constraint to be dropped
+     * @param string    $primary      hint if the constraint is primary
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropConstraint($table, $name, $primary = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $table = $db->quoteIdentifier($table, true);
+        $name = $db->quoteIdentifier($db->getIndexName($name), true);
+        return $db->exec("ALTER TABLE $table DROP CONSTRAINT $name");
+    }
+
+    // }}}
+    // {{{ listTableConstraints()
+
+    /**
+     * list all constraints in a table
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of constraint names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableConstraints($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ createSequence()
+
+    /**
+     * create sequence
+     *
+     * @param string    $seq_name     name of the sequence to be created
+     * @param string    $start         start value of the sequence; default is 1
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createSequence($seq_name, $start = 1)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ dropSequence()
+
+    /**
+     * drop existing sequence
+     *
+     * @param string    $seq_name     name of the sequence to be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropSequence($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listSequences()
+
+    /**
+     * list all sequences in the current database
+     *
+     * @param string database, the current is default
+     *               NB: not all the drivers can get the sequence names from
+     *               a database other than the current one
+     * @return mixed array of sequence names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listSequences($database = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Manager/mysql.php b/inc/MDB2/Driver/Manager/mysql.php
new file mode 100755
index 00000000000..b37e346f403
--- /dev/null
+++ b/inc/MDB2/Driver/Manager/mysql.php
@@ -0,0 +1,1432 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: mysql.php,v 1.113 2008/11/23 20:30:29 quipo Exp $
+//
+
+require_once 'MDB2/Driver/Manager/Common.php';
+
+/**
+ * MDB2 MySQL driver for the management modules
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Manager_mysql extends MDB2_Driver_Manager_Common
+{
+
+    // }}}
+    // {{{ createDatabase()
+
+    /**
+     * create a new database
+     *
+     * @param string $name    name of the database that should be created
+     * @param array  $options array with charset, collation info
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createDatabase($name, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name  = $db->quoteIdentifier($name, true);
+        $query = 'CREATE DATABASE ' . $name;
+        if (!empty($options['charset'])) {
+            $query .= ' DEFAULT CHARACTER SET ' . $db->quote($options['charset'], 'text');
+        }
+        if (!empty($options['collation'])) {
+            $query .= ' COLLATE ' . $db->quote($options['collation'], 'text');
+        }
+        return $db->standaloneQuery($query, null, true);
+    }
+
+    // }}}
+    // {{{ alterDatabase()
+
+    /**
+     * alter an existing database
+     *
+     * @param string $name    name of the database that is intended to be changed
+     * @param array  $options array with charset, collation info
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function alterDatabase($name, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'ALTER DATABASE '. $db->quoteIdentifier($name, true);
+        if (!empty($options['charset'])) {
+            $query .= ' DEFAULT CHARACTER SET ' . $db->quote($options['charset'], 'text');
+        }
+        if (!empty($options['collation'])) {
+            $query .= ' COLLATE ' . $db->quote($options['collation'], 'text');
+        }
+        return $db->standaloneQuery($query, null, true);
+    }
+
+    // }}}
+    // {{{ dropDatabase()
+
+    /**
+     * drop an existing database
+     *
+     * @param string $name name of the database that should be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropDatabase($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        $query = "DROP DATABASE $name";
+        return $db->standaloneQuery($query, null, true);
+    }
+
+    // }}}
+    // {{{ _getAdvancedFKOptions()
+
+    /**
+     * Return the FOREIGN KEY query section dealing with non-standard options
+     * as MATCH, INITIALLY DEFERRED, ON UPDATE, ...
+     *
+     * @param array $definition
+     * @return string
+     * @access protected
+     */
+    function _getAdvancedFKOptions($definition)
+    {
+        $query = '';
+        if (!empty($definition['match'])) {
+            $query .= ' MATCH '.$definition['match'];
+        }
+        if (!empty($definition['onupdate'])) {
+            $query .= ' ON UPDATE '.$definition['onupdate'];
+        }
+        if (!empty($definition['ondelete'])) {
+            $query .= ' ON DELETE '.$definition['ondelete'];
+        }
+        return $query;
+    }
+
+    // }}}
+    // {{{ createTable()
+
+    /**
+     * create a new table
+     *
+     * @param string $name   Name of the database that should be created
+     * @param array $fields  Associative array that contains the definition of each field of the new table
+     *                       The indexes of the array entries are the names of the fields of the table an
+     *                       the array entry values are associative arrays like those that are meant to be
+     *                       passed with the field definitions to get[Type]Declaration() functions.
+     *                          array(
+     *                              'id' => array(
+     *                                  'type' => 'integer',
+     *                                  'unsigned' => 1
+     *                                  'notnull' => 1
+     *                                  'default' => 0
+     *                              ),
+     *                              'name' => array(
+     *                                  'type' => 'text',
+     *                                  'length' => 12
+     *                              ),
+     *                              'password' => array(
+     *                                  'type' => 'text',
+     *                                  'length' => 12
+     *                              )
+     *                          );
+     * @param array $options  An associative array of table options:
+     *                          array(
+     *                              'comment' => 'Foo',
+     *                              'charset' => 'utf8',
+     *                              'collate' => 'utf8_unicode_ci',
+     *                              'type'    => 'innodb',
+     *                          );
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createTable($name, $fields, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        // if we have an AUTO_INCREMENT column and a PK on more than one field,
+        // we have to handle it differently...
+        $autoincrement = null;
+        if (empty($options['primary'])) {
+            $pk_fields = array();
+            foreach ($fields as $fieldname => $def) {
+                if (!empty($def['primary'])) {
+                    $pk_fields[$fieldname] = true;
+                }
+                if (!empty($def['autoincrement'])) {
+                    $autoincrement = $fieldname;
+                }
+            }
+            if (!is_null($autoincrement) && count($pk_fields) > 1) {
+                $options['primary'] = $pk_fields;
+            } else {
+                // the PK constraint is on max one field => OK
+                $autoincrement = null;
+            }
+        }
+
+        $query = $this->_getCreateTableQuery($name, $fields, $options);
+        if (PEAR::isError($query)) {
+            return $query;
+        }
+
+        if (!is_null($autoincrement)) {
+            // we have to remove the PK clause added by _getIntegerDeclaration()
+            $query = str_replace('AUTO_INCREMENT PRIMARY KEY', 'AUTO_INCREMENT', $query);
+        }
+
+        $options_strings = array();
+
+        if (!empty($options['comment'])) {
+            $options_strings['comment'] = 'COMMENT = '.$db->quote($options['comment'], 'text');
+        }
+
+        if (!empty($options['charset'])) {
+            $options_strings['charset'] = 'DEFAULT CHARACTER SET '.$options['charset'];
+            if (!empty($options['collate'])) {
+                $options_strings['charset'].= ' COLLATE '.$options['collate'];
+            }
+        }
+
+        $type = false;
+        if (!empty($options['type'])) {
+            $type = $options['type'];
+        } elseif ($db->options['default_table_type']) {
+            $type = $db->options['default_table_type'];
+        }
+        if ($type) {
+            $options_strings[] = "ENGINE = $type";
+        }
+
+        if (!empty($options_strings)) {
+            $query .= ' '.implode(' ', $options_strings);
+        }
+        $result = $db->exec($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ dropTable()
+
+    /**
+     * drop an existing table
+     *
+     * @param string $name name of the table that should be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropTable($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        //delete the triggers associated to existing FK constraints
+        $constraints = $this->listTableConstraints($name);
+        if (!PEAR::isError($constraints) && !empty($constraints)) {
+            $db->loadModule('Reverse', null, true);
+            foreach ($constraints as $constraint) {
+                $definition = $db->reverse->getTableConstraintDefinition($name, $constraint);
+                if (!PEAR::isError($definition) && !empty($definition['foreign'])) {
+                    $result = $this->_dropFKTriggers($name, $constraint, $definition['references']['table']);
+                    if (PEAR::isError($result)) {
+                        return $result;
+                    }
+                }
+            }
+        }
+
+        return parent::dropTable($name);
+    }
+
+    // }}}
+    // {{{ truncateTable()
+
+    /**
+     * Truncate an existing table (if the TRUNCATE TABLE syntax is not supported,
+     * it falls back to a DELETE FROM TABLE query)
+     *
+     * @param string $name name of the table that should be truncated
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function truncateTable($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        return $db->exec("TRUNCATE TABLE $name");
+    }
+
+    // }}}
+    // {{{ vacuum()
+
+    /**
+     * Optimize (vacuum) all the tables in the db (or only the specified table)
+     * and optionally run ANALYZE.
+     *
+     * @param string $table table name (all the tables if empty)
+     * @param array  $options an array with driver-specific options:
+     *               - timeout [int] (in seconds) [mssql-only]
+     *               - analyze [boolean] [pgsql and mysql]
+     *               - full [boolean] [pgsql-only]
+     *               - freeze [boolean] [pgsql-only]
+     *
+     * @return mixed MDB2_OK success, a MDB2 error on failure
+     * @access public
+     */
+    function vacuum($table = null, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (empty($table)) {
+            $table = $this->listTables();
+            if (PEAR::isError($table)) {
+                return $table;
+            }
+        }
+        if (is_array($table)) {
+            foreach (array_keys($table) as $k) {
+            	$table[$k] = $db->quoteIdentifier($table[$k], true);
+            }
+            $table = implode(', ', $table);
+        } else {
+            $table = $db->quoteIdentifier($table, true);
+        }
+        
+        $result = $db->exec('OPTIMIZE TABLE '.$table);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if (!empty($options['analyze'])) {
+            return $db->exec('ANALYZE TABLE '.$table);
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ alterTable()
+
+    /**
+     * alter an existing table
+     *
+     * @param string $name         name of the table that is intended to be changed.
+     * @param array $changes     associative array that contains the details of each type
+     *                             of change that is intended to be performed. The types of
+     *                             changes that are currently supported are defined as follows:
+     *
+     *                             name
+     *
+     *                                New name for the table.
+     *
+     *                            add
+     *
+     *                                Associative array with the names of fields to be added as
+     *                                 indexes of the array. The value of each entry of the array
+     *                                 should be set to another associative array with the properties
+     *                                 of the fields to be added. The properties of the fields should
+     *                                 be the same as defined by the MDB2 parser.
+     *
+     *
+     *                            remove
+     *
+     *                                Associative array with the names of fields to be removed as indexes
+     *                                 of the array. Currently the values assigned to each entry are ignored.
+     *                                 An empty array should be used for future compatibility.
+     *
+     *                            rename
+     *
+     *                                Associative array with the names of fields to be renamed as indexes
+     *                                 of the array. The value of each entry of the array should be set to
+     *                                 another associative array with the entry named name with the new
+     *                                 field name and the entry named Declaration that is expected to contain
+     *                                 the portion of the field declaration already in DBMS specific SQL code
+     *                                 as it is used in the CREATE TABLE statement.
+     *
+     *                            change
+     *
+     *                                Associative array with the names of the fields to be changed as indexes
+     *                                 of the array. Keep in mind that if it is intended to change either the
+     *                                 name of a field and any other properties, the change array entries
+     *                                 should have the new names of the fields as array indexes.
+     *
+     *                                The value of each entry of the array should be set to another associative
+     *                                 array with the properties of the fields to that are meant to be changed as
+     *                                 array entries. These entries should be assigned to the new values of the
+     *                                 respective properties. The properties of the fields should be the same
+     *                                 as defined by the MDB2 parser.
+     *
+     *                            Example
+     *                                array(
+     *                                    'name' => 'userlist',
+     *                                    'add' => array(
+     *                                        'quota' => array(
+     *                                            'type' => 'integer',
+     *                                            'unsigned' => 1
+     *                                        )
+     *                                    ),
+     *                                    'remove' => array(
+     *                                        'file_limit' => array(),
+     *                                        'time_limit' => array()
+     *                                    ),
+     *                                    'change' => array(
+     *                                        'name' => array(
+     *                                            'length' => '20',
+     *                                            'definition' => array(
+     *                                                'type' => 'text',
+     *                                                'length' => 20,
+     *                                            ),
+     *                                        )
+     *                                    ),
+     *                                    'rename' => array(
+     *                                        'sex' => array(
+     *                                            'name' => 'gender',
+     *                                            'definition' => array(
+     *                                                'type' => 'text',
+     *                                                'length' => 1,
+     *                                                'default' => 'M',
+     *                                            ),
+     *                                        )
+     *                                    )
+     *                                )
+     *
+     * @param boolean $check     indicates whether the function should just check if the DBMS driver
+     *                             can perform the requested table alterations if the value is true or
+     *                             actually perform them otherwise.
+     * @access public
+     *
+      * @return mixed MDB2_OK on success, a MDB2 error on failure
+     */
+    function alterTable($name, $changes, $check)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        foreach ($changes as $change_name => $change) {
+            switch ($change_name) {
+            case 'add':
+            case 'remove':
+            case 'change':
+            case 'rename':
+            case 'name':
+                break;
+            default:
+                return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
+                    'change type "'.$change_name.'" not yet supported', __FUNCTION__);
+            }
+        }
+
+        if ($check) {
+            return MDB2_OK;
+        }
+
+        $query = '';
+        if (!empty($changes['name'])) {
+            $change_name = $db->quoteIdentifier($changes['name'], true);
+            $query .= 'RENAME TO ' . $change_name;
+        }
+
+        if (!empty($changes['add']) && is_array($changes['add'])) {
+            foreach ($changes['add'] as $field_name => $field) {
+                if ($query) {
+                    $query.= ', ';
+                }
+                $query.= 'ADD ' . $db->getDeclaration($field['type'], $field_name, $field);
+            }
+        }
+
+        if (!empty($changes['remove']) && is_array($changes['remove'])) {
+            foreach ($changes['remove'] as $field_name => $field) {
+                if ($query) {
+                    $query.= ', ';
+                }
+                $field_name = $db->quoteIdentifier($field_name, true);
+                $query.= 'DROP ' . $field_name;
+            }
+        }
+
+        $rename = array();
+        if (!empty($changes['rename']) && is_array($changes['rename'])) {
+            foreach ($changes['rename'] as $field_name => $field) {
+                $rename[$field['name']] = $field_name;
+            }
+        }
+
+        if (!empty($changes['change']) && is_array($changes['change'])) {
+            foreach ($changes['change'] as $field_name => $field) {
+                if ($query) {
+                    $query.= ', ';
+                }
+                if (isset($rename[$field_name])) {
+                    $old_field_name = $rename[$field_name];
+                    unset($rename[$field_name]);
+                } else {
+                    $old_field_name = $field_name;
+                }
+                $old_field_name = $db->quoteIdentifier($old_field_name, true);
+                $query.= "CHANGE $old_field_name " . $db->getDeclaration($field['definition']['type'], $field_name, $field['definition']);
+            }
+        }
+
+        if (!empty($rename) && is_array($rename)) {
+            foreach ($rename as $rename_name => $renamed_field) {
+                if ($query) {
+                    $query.= ', ';
+                }
+                $field = $changes['rename'][$renamed_field];
+                $renamed_field = $db->quoteIdentifier($renamed_field, true);
+                $query.= 'CHANGE ' . $renamed_field . ' ' . $db->getDeclaration($field['definition']['type'], $field['name'], $field['definition']);
+            }
+        }
+
+        if (!$query) {
+            return MDB2_OK;
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        return $db->exec("ALTER TABLE $name $query");
+    }
+
+    // }}}
+    // {{{ listDatabases()
+
+    /**
+     * list all databases
+     *
+     * @return mixed array of database names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listDatabases()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $result = $db->queryCol('SHOW DATABASES');
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listUsers()
+
+    /**
+     * list all users
+     *
+     * @return mixed array of user names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listUsers()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->queryCol('SELECT DISTINCT USER FROM mysql.USER');
+    }
+
+    // }}}
+    // {{{ listFunctions()
+
+    /**
+     * list all functions in the current database
+     *
+     * @return mixed array of function names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listFunctions()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT name FROM mysql.proc";
+        /*
+        SELECT ROUTINE_NAME
+          FROM INFORMATION_SCHEMA.ROUTINES
+         WHERE ROUTINE_TYPE = 'FUNCTION'
+        */
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listTableTriggers()
+
+    /**
+     * list all triggers in the database that reference a given table
+     *
+     * @param string table for which all referenced triggers should be found
+     * @return mixed array of trigger names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableTriggers($table = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'SHOW TRIGGERS';
+        if (!is_null($table)) {
+            $table = $db->quote($table, 'text');
+            $query .= " LIKE $table";
+        }
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listTables()
+
+    /**
+     * list all tables in the current database
+     *
+     * @param string database, the current is default
+     * @return mixed array of table names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTables($database = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SHOW /*!50002 FULL*/ TABLES";
+        if (!is_null($database)) {
+            $query .= " FROM $database";
+        }
+        $query.= "/*!50002  WHERE Table_type = 'BASE TABLE'*/";
+
+        $table_names = $db->queryAll($query, null, MDB2_FETCHMODE_ORDERED);
+        if (PEAR::isError($table_names)) {
+            return $table_names;
+        }
+
+        $result = array();
+        foreach ($table_names as $table) {
+            if (!$this->_fixSequenceName($table[0], true)) {
+                $result[] = $table[0];
+            }
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listViews()
+
+    /**
+     * list all views in the current database
+     *
+     * @param string database, the current is default
+     * @return mixed array of view names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listViews($database = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'SHOW FULL TABLES';
+        if (!is_null($database)) {
+            $query.= " FROM $database";
+        }
+        $query.= " WHERE Table_type = 'VIEW'";
+
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listTableFields()
+
+    /**
+     * list all fields in a table in the current database
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of field names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableFields($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $table = $db->quoteIdentifier($table, true);
+        $result = $db->queryCol("SHOW COLUMNS FROM $table");
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ createIndex()
+
+    /**
+     * Get the stucture of a field into an array
+     *
+     * @author Leoncx
+     * @param string $table      name of the table on which the index is to be created
+     * @param string $name       name of the index to be created
+     * @param array  $definition associative array that defines properties of the index to be created.
+     *                           Currently, only one property named FIELDS is supported. This property
+     *                           is also an associative with the names of the index fields as array
+     *                           indexes. Each entry of this array is set to another type of associative
+     *                           array that specifies properties of the index that are specific to
+     *                           each field.
+     *
+     *                           Currently, only the sorting property is supported. It should be used
+     *                           to define the sorting direction of the index. It may be set to either
+     *                           ascending or descending.
+     *
+     *                           Not all DBMS support index sorting direction configuration. The DBMS
+     *                           drivers of those that do not support it ignore this property. Use the
+     *                           function supports() to determine whether the DBMS driver can manage indexes.
+     *
+     *                           Example
+     *                               array(
+     *                                   'fields' => array(
+     *                                       'user_name' => array(
+     *                                           'sorting' => 'ascending'
+     *                                           'length' => 10
+     *                                       ),
+     *                                       'last_login' => array()
+     *                                    )
+     *                                )
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createIndex($table, $name, $definition)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $table = $db->quoteIdentifier($table, true);
+        $name = $db->quoteIdentifier($db->getIndexName($name), true);
+        $query = "CREATE INDEX $name ON $table";
+        $fields = array();
+        foreach ($definition['fields'] as $field => $fieldinfo) {
+            if (!empty($fieldinfo['length'])) {
+                $fields[] = $db->quoteIdentifier($field, true) . '(' . $fieldinfo['length'] . ')';
+            } else {
+                $fields[] = $db->quoteIdentifier($field, true);
+            }
+        }
+        $query .= ' ('. implode(', ', $fields) . ')';
+        return $db->exec($query);
+    }
+
+    // }}}
+    // {{{ dropIndex()
+
+    /**
+     * drop existing index
+     *
+     * @param string    $table         name of table that should be used in method
+     * @param string    $name         name of the index to be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropIndex($table, $name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $table = $db->quoteIdentifier($table, true);
+        $name = $db->quoteIdentifier($db->getIndexName($name), true);
+        return $db->exec("DROP INDEX $name ON $table");
+    }
+
+    // }}}
+    // {{{ listTableIndexes()
+
+    /**
+     * list all indexes in a table
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of index names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableIndexes($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $key_name = 'Key_name';
+        $non_unique = 'Non_unique';
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            if ($db->options['field_case'] == CASE_LOWER) {
+                $key_name = strtolower($key_name);
+                $non_unique = strtolower($non_unique);
+            } else {
+                $key_name = strtoupper($key_name);
+                $non_unique = strtoupper($non_unique);
+            }
+        }
+
+        $table = $db->quoteIdentifier($table, true);
+        $query = "SHOW INDEX FROM $table";
+        $indexes = $db->queryAll($query, null, MDB2_FETCHMODE_ASSOC);
+        if (PEAR::isError($indexes)) {
+            return $indexes;
+        }
+
+        $result = array();
+        foreach ($indexes as $index_data) {
+            if ($index_data[$non_unique] && ($index = $this->_fixIndexName($index_data[$key_name]))) {
+                $result[$index] = true;
+            }
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_change_key_case($result, $db->options['field_case']);
+        }
+        return array_keys($result);
+    }
+
+    // }}}
+    // {{{ createConstraint()
+
+    /**
+     * create a constraint on a table
+     *
+     * @param string    $table        name of the table on which the constraint is to be created
+     * @param string    $name         name of the constraint to be created
+     * @param array     $definition   associative array that defines properties of the constraint to be created.
+     *                                Currently, only one property named FIELDS is supported. This property
+     *                                is also an associative with the names of the constraint fields as array
+     *                                constraints. Each entry of this array is set to another type of associative
+     *                                array that specifies properties of the constraint that are specific to
+     *                                each field.
+     *
+     *                                Example
+     *                                   array(
+     *                                       'fields' => array(
+     *                                           'user_name' => array(),
+     *                                           'last_login' => array()
+     *                                       )
+     *                                   )
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createConstraint($table, $name, $definition)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $type = '';
+        $idx_name = $db->quoteIdentifier($db->getIndexName($name), true);
+        if (!empty($definition['primary'])) {
+            $type = 'PRIMARY';
+            $idx_name = 'KEY';
+        } elseif (!empty($definition['unique'])) {
+            $type = 'UNIQUE';
+        } elseif (!empty($definition['foreign'])) {
+            $type = 'CONSTRAINT';
+        }
+        if (empty($type)) {
+            return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'invalid definition, could not create constraint', __FUNCTION__);
+        }
+
+        $table_quoted = $db->quoteIdentifier($table, true);
+        $query = "ALTER TABLE $table_quoted ADD $type $idx_name";
+        if (!empty($definition['foreign'])) {
+            $query .= ' FOREIGN KEY';
+        }
+        $fields = array();
+        foreach ($definition['fields'] as $field => $fieldinfo) {
+            $quoted = $db->quoteIdentifier($field, true);
+            if (!empty($fieldinfo['length'])) {
+                $quoted .= '(' . $fieldinfo['length'] . ')';
+            }
+            $fields[] = $quoted;
+        }
+        $query .= ' ('. implode(', ', $fields) . ')';
+        if (!empty($definition['foreign'])) {
+            $query.= ' REFERENCES ' . $db->quoteIdentifier($definition['references']['table'], true);
+            $referenced_fields = array();
+            foreach (array_keys($definition['references']['fields']) as $field) {
+                $referenced_fields[] = $db->quoteIdentifier($field, true);
+            }
+            $query .= ' ('. implode(', ', $referenced_fields) . ')';
+            $query .= $this->_getAdvancedFKOptions($definition);
+
+            // add index on FK column(s) or we can't add a FK constraint
+            // @see http://forums.mysql.com/read.php?22,19755,226009
+            $result = $this->createIndex($table, $name.'_fkidx', $definition);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+        $res = $db->exec($query);
+        if (PEAR::isError($res)) {
+            return $res;
+        }
+        if (!empty($definition['foreign'])) {
+            return $this->_createFKTriggers($table, array($name => $definition));
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ dropConstraint()
+
+    /**
+     * drop existing constraint
+     *
+     * @param string    $table        name of table that should be used in method
+     * @param string    $name         name of the constraint to be dropped
+     * @param string    $primary      hint if the constraint is primary
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropConstraint($table, $name, $primary = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if ($primary || strtolower($name) == 'primary') {
+            $query = 'ALTER TABLE '. $db->quoteIdentifier($table, true) .' DROP PRIMARY KEY';
+            return $db->exec($query);
+        }
+
+        //is it a FK constraint? If so, also delete the associated triggers
+        $db->loadModule('Reverse', null, true);
+        $definition = $db->reverse->getTableConstraintDefinition($table, $name);
+        if (!PEAR::isError($definition) && !empty($definition['foreign'])) {
+            //first drop the FK enforcing triggers
+            $result = $this->_dropFKTriggers($table, $name, $definition['references']['table']);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            //then drop the constraint itself
+            $table = $db->quoteIdentifier($table, true);
+            $name = $db->quoteIdentifier($db->getIndexName($name), true);
+            $query = "ALTER TABLE $table DROP FOREIGN KEY $name";
+            return $db->exec($query);
+        }
+
+        $table = $db->quoteIdentifier($table, true);
+        $name = $db->quoteIdentifier($db->getIndexName($name), true);
+        $query = "ALTER TABLE $table DROP INDEX $name";
+        return $db->exec($query);
+    }
+
+    // }}}
+    // {{{ _createFKTriggers()
+
+    /**
+     * Create triggers to enforce the FOREIGN KEY constraint on the table
+     *
+     * NB: since there's no RAISE_APPLICATION_ERROR facility in mysql,
+     * we call a non-existent procedure to raise the FK violation message.
+     * @see http://forums.mysql.com/read.php?99,55108,71877#msg-71877
+     *
+     * @param string $table        table name
+     * @param array  $foreign_keys FOREIGN KEY definitions
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access private
+     */
+    function _createFKTriggers($table, $foreign_keys)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        // create triggers to enforce FOREIGN KEY constraints
+        if ($db->supports('triggers') && !empty($foreign_keys)) {
+            $table_quoted = $db->quoteIdentifier($table, true);
+            foreach ($foreign_keys as $fkname => $fkdef) {
+                if (empty($fkdef)) {
+                    continue;
+                }
+                //set actions to default if not set
+                $fkdef['onupdate'] = empty($fkdef['onupdate']) ? $db->options['default_fk_action_onupdate'] : strtoupper($fkdef['onupdate']);
+                $fkdef['ondelete'] = empty($fkdef['ondelete']) ? $db->options['default_fk_action_ondelete'] : strtoupper($fkdef['ondelete']);
+
+                $trigger_names = array(
+                    'insert'    => $fkname.'_insert_trg',
+                    'update'    => $fkname.'_update_trg',
+                    'pk_update' => $fkname.'_pk_update_trg',
+                    'pk_delete' => $fkname.'_pk_delete_trg',
+                );
+                $table_fields = array_keys($fkdef['fields']);
+                $referenced_fields = array_keys($fkdef['references']['fields']);
+
+                //create the ON [UPDATE|DELETE] triggers on the primary table
+                $restrict_action = ' IF (SELECT ';
+                $aliased_fields = array();
+                foreach ($table_fields as $field) {
+                    $aliased_fields[] = $table_quoted .'.'.$field .' AS '.$field;
+                }
+                $restrict_action .= implode(',', $aliased_fields)
+                       .' FROM '.$table_quoted
+                       .' WHERE ';
+                $conditions  = array();
+                $new_values  = array();
+                $null_values = array();
+                for ($i=0; $i<count($table_fields); $i++) {
+                    $conditions[]  = $table_fields[$i] .' = OLD.'.$referenced_fields[$i];
+                    $new_values[]  = $table_fields[$i] .' = NEW.'.$referenced_fields[$i];
+                    $null_values[] = $table_fields[$i] .' = NULL';
+                }
+                $conditions2 = array();
+                for ($i=0; $i<count($referenced_fields); $i++) {
+                    $conditions2[]  = 'NEW.'.$referenced_fields[$i] .' <> OLD.'.$referenced_fields[$i];
+                }
+                $restrict_action .= implode(' AND ', $conditions).') IS NOT NULL'
+                                .' AND (' .implode(' OR ', $conditions2) .')'
+                                .' THEN CALL %s_ON_TABLE_'.$table.'_VIOLATES_FOREIGN_KEY_CONSTRAINT();'
+                                .' END IF;';
+
+                $cascade_action_update = 'UPDATE '.$table_quoted.' SET '.implode(', ', $new_values) .' WHERE '.implode(' AND ', $conditions). ';';
+                $cascade_action_delete = 'DELETE FROM '.$table_quoted.' WHERE '.implode(' AND ', $conditions). ';';
+                $setnull_action        = 'UPDATE '.$table_quoted.' SET '.implode(', ', $null_values).' WHERE '.implode(' AND ', $conditions). ';';
+
+                if ('SET DEFAULT' == $fkdef['onupdate'] || 'SET DEFAULT' == $fkdef['ondelete']) {
+                    $db->loadModule('Reverse', null, true);
+                    $default_values = array();
+                    foreach ($table_fields as $table_field) {
+                        $field_definition = $db->reverse->getTableFieldDefinition($table, $field);
+                        if (PEAR::isError($field_definition)) {
+                            return $field_definition;
+                        }
+                        $default_values[] = $table_field .' = '. $field_definition[0]['default'];
+                    }
+                    $setdefault_action = 'UPDATE '.$table_quoted.' SET '.implode(', ', $default_values).' WHERE '.implode(' AND ', $conditions). ';';
+                }
+
+                $query = 'CREATE TRIGGER %s'
+                        .' %s ON '.$fkdef['references']['table']
+                        .' FOR EACH ROW BEGIN '
+                        .' SET FOREIGN_KEY_CHECKS = 0; ';  //only really needed for ON UPDATE CASCADE
+
+                if ('CASCADE' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query, $trigger_names['pk_update'], 'BEFORE UPDATE',  'update') . $cascade_action_update;
+                } elseif ('SET NULL' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query, $trigger_names['pk_update'], 'BEFORE UPDATE', 'update') . $setnull_action;
+                } elseif ('SET DEFAULT' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query, $trigger_names['pk_update'], 'BEFORE UPDATE', 'update') . $setdefault_action;
+                } elseif ('NO ACTION' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query.$restrict_action, $trigger_names['pk_update'], 'AFTER UPDATE', 'update');
+                } elseif ('RESTRICT' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query.$restrict_action, $trigger_names['pk_update'], 'BEFORE UPDATE', 'update');
+                }
+                if ('CASCADE' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query, $trigger_names['pk_delete'], 'BEFORE DELETE',  'delete') . $cascade_action_delete;
+                } elseif ('SET NULL' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query, $trigger_names['pk_delete'], 'BEFORE DELETE', 'delete') . $setnull_action;
+                } elseif ('SET DEFAULT' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query, $trigger_names['pk_delete'], 'BEFORE DELETE', 'delete') . $setdefault_action;
+                } elseif ('NO ACTION' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query.$restrict_action, $trigger_names['pk_delete'], 'AFTER DELETE', 'delete');
+                } elseif ('RESTRICT' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query.$restrict_action, $trigger_names['pk_delete'], 'BEFORE DELETE', 'delete');
+                }
+                $sql_update .= ' SET FOREIGN_KEY_CHECKS = 1; END;';
+                $sql_delete .= ' SET FOREIGN_KEY_CHECKS = 1; END;';
+
+                $db->pushErrorHandling(PEAR_ERROR_RETURN);
+                $db->expectError(MDB2_ERROR_CANNOT_CREATE);
+                $result = $db->exec($sql_delete);
+                $expected_errmsg = 'This MySQL version doesn\'t support multiple triggers with the same action time and event for one table';
+                $db->popExpect();
+                $db->popErrorHandling();
+                if (PEAR::isError($result)) {
+                    if ($result->getCode() != MDB2_ERROR_CANNOT_CREATE) {
+                        return $result;
+                    }
+                    $db->warnings[] = $expected_errmsg;
+                }
+                $db->pushErrorHandling(PEAR_ERROR_RETURN);
+                $db->expectError(MDB2_ERROR_CANNOT_CREATE);
+                $result = $db->exec($sql_update);
+                $db->popExpect();
+                $db->popErrorHandling();
+                if (PEAR::isError($result) && $result->getCode() != MDB2_ERROR_CANNOT_CREATE) {
+                    if ($result->getCode() != MDB2_ERROR_CANNOT_CREATE) {
+                        return $result;
+                    }
+                    $db->warnings[] = $expected_errmsg;
+                }
+            }
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ _dropFKTriggers()
+
+    /**
+     * Drop the triggers created to enforce the FOREIGN KEY constraint on the table
+     *
+     * @param string $table            table name
+     * @param string $fkname           FOREIGN KEY constraint name
+     * @param string $referenced_table referenced table name
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access private
+     */
+    function _dropFKTriggers($table, $fkname, $referenced_table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $triggers  = $this->listTableTriggers($table);
+        $triggers2 = $this->listTableTriggers($referenced_table);
+        if (!PEAR::isError($triggers2) && !PEAR::isError($triggers)) {
+            $triggers = array_merge($triggers, $triggers2);
+            $pattern = '/^'.$fkname.'(_pk)?_(insert|update|delete)_trg$/i';
+            foreach ($triggers as $trigger) {
+                if (preg_match($pattern, $trigger)) {
+                    $result = $db->exec('DROP TRIGGER '.$trigger);
+                    if (PEAR::isError($result)) {
+                        return $result;
+                    }
+                }
+            }
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ listTableConstraints()
+
+    /**
+     * list all constraints in a table
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of constraint names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableConstraints($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $key_name = 'Key_name';
+        $non_unique = 'Non_unique';
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            if ($db->options['field_case'] == CASE_LOWER) {
+                $key_name = strtolower($key_name);
+                $non_unique = strtolower($non_unique);
+            } else {
+                $key_name = strtoupper($key_name);
+                $non_unique = strtoupper($non_unique);
+            }
+        }
+
+        $query = 'SHOW INDEX FROM ' . $db->quoteIdentifier($table, true);
+        $indexes = $db->queryAll($query, null, MDB2_FETCHMODE_ASSOC);
+        if (PEAR::isError($indexes)) {
+            return $indexes;
+        }
+
+        $result = array();
+        foreach ($indexes as $index_data) {
+            if (!$index_data[$non_unique]) {
+                if ($index_data[$key_name] !== 'PRIMARY') {
+                    $index = $this->_fixIndexName($index_data[$key_name]);
+                } else {
+                    $index = 'PRIMARY';
+                }
+                if (!empty($index)) {
+                    $result[$index] = true;
+                }
+            }
+        }
+        
+        //list FOREIGN KEY constraints...
+        $query = 'SHOW CREATE TABLE '. $db->escape($table);
+        $definition = $db->queryOne($query, 'text', 1);
+        if (!PEAR::isError($definition) && !empty($definition)) {
+            $pattern = '/\bCONSTRAINT\b\s+([^\s]+)\s+\bFOREIGN KEY\b/Uims';
+            if (preg_match_all($pattern, str_replace('`', '', $definition), $matches) > 0) {
+                foreach ($matches[1] as $constraint) {
+                    $result[$constraint] = true;
+                }
+            }
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_change_key_case($result, $db->options['field_case']);
+        }
+        return array_keys($result);
+    }
+
+    // }}}
+    // {{{ createSequence()
+
+    /**
+     * create sequence
+     *
+     * @param string    $seq_name name of the sequence to be created
+     * @param string    $start    start value of the sequence; default is 1
+     * @param array     $options  An associative array of table options:
+     *                          array(
+     *                              'comment' => 'Foo',
+     *                              'charset' => 'utf8',
+     *                              'collate' => 'utf8_unicode_ci',
+     *                              'type'    => 'innodb',
+     *                          );
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createSequence($seq_name, $start = 1, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $sequence_name = $db->quoteIdentifier($db->getSequenceName($seq_name), true);
+        $seqcol_name = $db->quoteIdentifier($db->options['seqcol_name'], true);
+        
+        $options_strings = array();
+
+        if (!empty($options['comment'])) {
+            $options_strings['comment'] = 'COMMENT = '.$db->quote($options['comment'], 'text');
+        }
+
+        if (!empty($options['charset'])) {
+            $options_strings['charset'] = 'DEFAULT CHARACTER SET '.$options['charset'];
+            if (!empty($options['collate'])) {
+                $options_strings['charset'].= ' COLLATE '.$options['collate'];
+            }
+        }
+
+        $type = false;
+        if (!empty($options['type'])) {
+            $type = $options['type'];
+        } elseif ($db->options['default_table_type']) {
+            $type = $db->options['default_table_type'];
+        }
+        if ($type) {
+            $options_strings[] = "ENGINE = $type";
+        }
+
+        $query = "CREATE TABLE $sequence_name ($seqcol_name INT NOT NULL AUTO_INCREMENT, PRIMARY KEY ($seqcol_name))";
+        if (!empty($options_strings)) {
+            $query .= ' '.implode(' ', $options_strings);
+        }
+        $res = $db->exec($query);
+        if (PEAR::isError($res)) {
+            return $res;
+        }
+
+        if ($start == 1) {
+            return MDB2_OK;
+        }
+
+        $query = "INSERT INTO $sequence_name ($seqcol_name) VALUES (".($start-1).')';
+        $res = $db->exec($query);
+        if (!PEAR::isError($res)) {
+            return MDB2_OK;
+        }
+
+        // Handle error
+        $result = $db->exec("DROP TABLE $sequence_name");
+        if (PEAR::isError($result)) {
+            return $db->raiseError($result, null, null,
+                'could not drop inconsistent sequence table', __FUNCTION__);
+        }
+
+        return $db->raiseError($res, null, null,
+            'could not create sequence table', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ dropSequence()
+
+    /**
+     * drop existing sequence
+     *
+     * @param string    $seq_name     name of the sequence to be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropSequence($seq_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $sequence_name = $db->quoteIdentifier($db->getSequenceName($seq_name), true);
+        return $db->exec("DROP TABLE $sequence_name");
+    }
+
+    // }}}
+    // {{{ listSequences()
+
+    /**
+     * list all sequences in the current database
+     *
+     * @param string database, the current is default
+     * @return mixed array of sequence names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listSequences($database = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SHOW TABLES";
+        if (!is_null($database)) {
+            $query .= " FROM $database";
+        }
+        $table_names = $db->queryCol($query);
+        if (PEAR::isError($table_names)) {
+            return $table_names;
+        }
+
+        $result = array();
+        foreach ($table_names as $table_name) {
+            if ($sqn = $this->_fixSequenceName($table_name, true)) {
+                $result[] = $sqn;
+            }
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Manager/pgsql.php b/inc/MDB2/Driver/Manager/pgsql.php
new file mode 100755
index 00000000000..3f9c121a50d
--- /dev/null
+++ b/inc/MDB2/Driver/Manager/pgsql.php
@@ -0,0 +1,948 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Paul Cooper <pgc@ucecom.com>                                 |
+// +----------------------------------------------------------------------+
+//
+// $Id: pgsql.php,v 1.87 2008/11/29 14:09:59 afz Exp $
+
+require_once 'MDB2/Driver/Manager/Common.php';
+
+/**
+ * MDB2 MySQL driver for the management modules
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Driver_Manager_pgsql extends MDB2_Driver_Manager_Common
+{
+    // {{{ createDatabase()
+
+    /**
+     * create a new database
+     *
+     * @param string $name    name of the database that should be created
+     * @param array  $options array with charset info
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createDatabase($name, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name  = $db->quoteIdentifier($name, true);
+        $query = 'CREATE DATABASE ' . $name;
+        if (!empty($options['charset'])) {
+            $query .= ' WITH ENCODING ' . $db->quote($options['charset'], 'text');
+        }
+        return $db->standaloneQuery($query, null, true);
+    }
+
+    // }}}
+    // {{{ alterDatabase()
+
+    /**
+     * alter an existing database
+     *
+     * @param string $name    name of the database that is intended to be changed
+     * @param array  $options array with name, owner info
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function alterDatabase($name, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'ALTER DATABASE '. $db->quoteIdentifier($name, true);
+        if (!empty($options['name'])) {
+            $query .= ' RENAME TO ' . $options['name'];
+        }
+        if (!empty($options['owner'])) {
+            $query .= ' OWNER TO ' . $options['owner'];
+        }
+        return $db->standaloneQuery($query, null, true);
+    }
+
+    // }}}
+    // {{{ dropDatabase()
+
+    /**
+     * drop an existing database
+     *
+     * @param string $name name of the database that should be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropDatabase($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        $query = "DROP DATABASE $name";
+        return $db->standaloneQuery($query, null, true);
+    }
+
+    // }}}
+    // {{{ _getAdvancedFKOptions()
+
+    /**
+     * Return the FOREIGN KEY query section dealing with non-standard options
+     * as MATCH, INITIALLY DEFERRED, ON UPDATE, ...
+     *
+     * @param array $definition
+     * @return string
+     * @access protected
+     */
+    function _getAdvancedFKOptions($definition)
+    {
+        $query = '';
+        if (!empty($definition['match'])) {
+            $query .= ' MATCH '.$definition['match'];
+        }
+        if (!empty($definition['onupdate'])) {
+            $query .= ' ON UPDATE '.$definition['onupdate'];
+        }
+        if (!empty($definition['ondelete'])) {
+            $query .= ' ON DELETE '.$definition['ondelete'];
+        }
+        if (!empty($definition['deferrable'])) {
+            $query .= ' DEFERRABLE';
+        } else {
+            $query .= ' NOT DEFERRABLE';
+        }
+        if (!empty($definition['initiallydeferred'])) {
+            $query .= ' INITIALLY DEFERRED';
+        } else {
+            $query .= ' INITIALLY IMMEDIATE';
+        }
+        return $query;
+    }
+
+    // }}}
+    // {{{ truncateTable()
+
+    /**
+     * Truncate an existing table (if the TRUNCATE TABLE syntax is not supported,
+     * it falls back to a DELETE FROM TABLE query)
+     *
+     * @param string $name name of the table that should be truncated
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function truncateTable($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        return $db->exec("TRUNCATE TABLE $name");
+    }
+
+    // }}}
+    // {{{ vacuum()
+
+    /**
+     * Optimize (vacuum) all the tables in the db (or only the specified table)
+     * and optionally run ANALYZE.
+     *
+     * @param string $table table name (all the tables if empty)
+     * @param array  $options an array with driver-specific options:
+     *               - timeout [int] (in seconds) [mssql-only]
+     *               - analyze [boolean] [pgsql and mysql]
+     *               - full [boolean] [pgsql-only]
+     *               - freeze [boolean] [pgsql-only]
+     *
+     * @return mixed MDB2_OK success, a MDB2 error on failure
+     * @access public
+     */
+    function vacuum($table = null, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        $query = 'VACUUM';
+
+        if (!empty($options['full'])) {
+            $query .= ' FULL';
+        }
+        if (!empty($options['freeze'])) {
+            $query .= ' FREEZE';
+        }
+        if (!empty($options['analyze'])) {
+            $query .= ' ANALYZE';
+        }
+
+        if (!empty($table)) {
+            $query .= ' '.$db->quoteIdentifier($table, true);
+        }
+        return $db->exec($query);
+    }
+
+    // }}}
+    // {{{ alterTable()
+
+    /**
+     * alter an existing table
+     *
+     * @param string $name         name of the table that is intended to be changed.
+     * @param array $changes     associative array that contains the details of each type
+     *                             of change that is intended to be performed. The types of
+     *                             changes that are currently supported are defined as follows:
+     *
+     *                             name
+     *
+     *                                New name for the table.
+     *
+     *                            add
+     *
+     *                                Associative array with the names of fields to be added as
+     *                                 indexes of the array. The value of each entry of the array
+     *                                 should be set to another associative array with the properties
+     *                                 of the fields to be added. The properties of the fields should
+     *                                 be the same as defined by the MDB2 parser.
+     *
+     *
+     *                            remove
+     *
+     *                                Associative array with the names of fields to be removed as indexes
+     *                                 of the array. Currently the values assigned to each entry are ignored.
+     *                                 An empty array should be used for future compatibility.
+     *
+     *                            rename
+     *
+     *                                Associative array with the names of fields to be renamed as indexes
+     *                                 of the array. The value of each entry of the array should be set to
+     *                                 another associative array with the entry named name with the new
+     *                                 field name and the entry named Declaration that is expected to contain
+     *                                 the portion of the field declaration already in DBMS specific SQL code
+     *                                 as it is used in the CREATE TABLE statement.
+     *
+     *                            change
+     *
+     *                                Associative array with the names of the fields to be changed as indexes
+     *                                 of the array. Keep in mind that if it is intended to change either the
+     *                                 name of a field and any other properties, the change array entries
+     *                                 should have the new names of the fields as array indexes.
+     *
+     *                                The value of each entry of the array should be set to another associative
+     *                                 array with the properties of the fields to that are meant to be changed as
+     *                                 array entries. These entries should be assigned to the new values of the
+     *                                 respective properties. The properties of the fields should be the same
+     *                                 as defined by the MDB2 parser.
+     *
+     *                            Example
+     *                                array(
+     *                                    'name' => 'userlist',
+     *                                    'add' => array(
+     *                                        'quota' => array(
+     *                                            'type' => 'integer',
+     *                                            'unsigned' => 1
+     *                                        )
+     *                                    ),
+     *                                    'remove' => array(
+     *                                        'file_limit' => array(),
+     *                                        'time_limit' => array()
+     *                                    ),
+     *                                    'change' => array(
+     *                                        'name' => array(
+     *                                            'length' => '20',
+     *                                            'definition' => array(
+     *                                                'type' => 'text',
+     *                                                'length' => 20,
+     *                                            ),
+     *                                        )
+     *                                    ),
+     *                                    'rename' => array(
+     *                                        'sex' => array(
+     *                                            'name' => 'gender',
+     *                                            'definition' => array(
+     *                                                'type' => 'text',
+     *                                                'length' => 1,
+     *                                                'default' => 'M',
+     *                                            ),
+     *                                        )
+     *                                    )
+     *                                )
+     *
+     * @param boolean $check     indicates whether the function should just check if the DBMS driver
+     *                             can perform the requested table alterations if the value is true or
+     *                             actually perform them otherwise.
+     * @access public
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     */
+    function alterTable($name, $changes, $check)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        foreach ($changes as $change_name => $change) {
+            switch ($change_name) {
+            case 'add':
+            case 'remove':
+            case 'change':
+            case 'name':
+            case 'rename':
+                break;
+            default:
+                return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
+                    'change type "'.$change_name.'\" not yet supported', __FUNCTION__);
+            }
+        }
+
+        if ($check) {
+            return MDB2_OK;
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+
+        if (!empty($changes['remove']) && is_array($changes['remove'])) {
+            foreach ($changes['remove'] as $field_name => $field) {
+                $field_name = $db->quoteIdentifier($field_name, true);
+                $query = 'DROP ' . $field_name;
+                $result = $db->exec("ALTER TABLE $name $query");
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+            }
+        }
+
+        if (!empty($changes['rename']) && is_array($changes['rename'])) {
+            foreach ($changes['rename'] as $field_name => $field) {
+                $field_name = $db->quoteIdentifier($field_name, true);
+                $result = $db->exec("ALTER TABLE $name RENAME COLUMN $field_name TO ".$db->quoteIdentifier($field['name'], true));
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+            }
+        }
+
+        if (!empty($changes['add']) && is_array($changes['add'])) {
+            foreach ($changes['add'] as $field_name => $field) {
+                $query = 'ADD ' . $db->getDeclaration($field['type'], $field_name, $field);
+                $result = $db->exec("ALTER TABLE $name $query");
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+            }
+        }
+
+        if (!empty($changes['change']) && is_array($changes['change'])) {
+            foreach ($changes['change'] as $field_name => $field) {
+                $field_name = $db->quoteIdentifier($field_name, true);
+                if (!empty($field['definition']['type'])) {
+                    $server_info = $db->getServerVersion();
+                    if (PEAR::isError($server_info)) {
+                        return $server_info;
+                    }
+                    if (is_array($server_info) && $server_info['major'] < 8) {
+                        return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
+                            'changing column type for "'.$change_name.'\" requires PostgreSQL 8.0 or above', __FUNCTION__);
+                    }
+                    $db->loadModule('Datatype', null, true);
+                    $type = $db->datatype->getTypeDeclaration($field['definition']);
+                    $query = "ALTER $field_name TYPE $type USING CAST($field_name AS $type)";
+                    $result = $db->exec("ALTER TABLE $name $query");
+                    if (PEAR::isError($result)) {
+                        return $result;
+                    }
+                }
+                if (array_key_exists('default', $field['definition'])) {
+                    $query = "ALTER $field_name SET DEFAULT ".$db->quote($field['definition']['default'], $field['definition']['type']);
+                    $result = $db->exec("ALTER TABLE $name $query");
+                    if (PEAR::isError($result)) {
+                        return $result;
+                    }
+                }
+                if (!empty($field['definition']['notnull'])) {
+                    $query = "ALTER $field_name ".($field['definition']['notnull'] ? 'SET' : 'DROP').' NOT NULL';
+                    $result = $db->exec("ALTER TABLE $name $query");
+                    if (PEAR::isError($result)) {
+                        return $result;
+                    }
+                }
+            }
+        }
+
+        if (!empty($changes['name'])) {
+            $change_name = $db->quoteIdentifier($changes['name'], true);
+            $result = $db->exec("ALTER TABLE $name RENAME TO ".$change_name);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ listDatabases()
+
+    /**
+     * list all databases
+     *
+     * @return mixed array of database names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listDatabases()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'SELECT datname FROM pg_database';
+        $result2 = $db->standaloneQuery($query, array('text'), false);
+        if (!MDB2::isResultCommon($result2)) {
+            return $result2;
+        }
+
+        $result = $result2->fetchCol();
+        $result2->free();
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listUsers()
+
+    /**
+     * list all users
+     *
+     * @return mixed array of user names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listUsers()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'SELECT usename FROM pg_user';
+        $result2 = $db->standaloneQuery($query, array('text'), false);
+        if (!MDB2::isResultCommon($result2)) {
+            return $result2;
+        }
+
+        $result = $result2->fetchCol();
+        $result2->free();
+        return $result;
+    }
+
+    // }}}
+    // {{{ listViews()
+
+    /**
+     * list all views in the current database
+     *
+     * @return mixed array of view names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listViews()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT viewname
+                    FROM pg_views
+                   WHERE schemaname NOT IN ('pg_catalog', 'information_schema')
+                     AND viewname !~ '^pg_'";
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listTableViews()
+
+    /**
+     * list the views in the database that reference a given table
+     *
+     * @param string table for which all referenced views should be found
+     * @return mixed array of view names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableViews($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'SELECT viewname FROM pg_views NATURAL JOIN pg_tables';
+        $query.= ' WHERE tablename ='.$db->quote($table, 'text');
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listFunctions()
+
+    /**
+     * list all functions in the current database
+     *
+     * @return mixed array of function names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listFunctions()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "
+            SELECT
+                proname
+            FROM
+                pg_proc pr,
+                pg_type tp
+            WHERE
+                tp.oid = pr.prorettype
+                AND pr.proisagg = FALSE
+                AND tp.typname <> 'trigger'
+                AND pr.pronamespace IN
+                    (SELECT oid FROM pg_namespace WHERE nspname NOT LIKE 'pg_%' AND nspname != 'information_schema')";
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listTableTriggers()
+
+    /**
+     * list all triggers in the database that reference a given table
+     *
+     * @param string table for which all referenced triggers should be found
+     * @return mixed array of trigger names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableTriggers($table = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'SELECT trg.tgname AS trigger_name
+                    FROM pg_trigger trg,
+                         pg_class tbl
+                   WHERE trg.tgrelid = tbl.oid';
+        if (!is_null($table)) {
+            $table = $db->quote(strtoupper($table), 'text');
+            $query .= " AND tbl.relname = $table";
+        }
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listTables()
+
+    /**
+     * list all tables in the current database
+     *
+     * @return mixed array of table names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTables()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        // gratuitously stolen from PEAR DB _getSpecialQuery in pgsql.php
+        $query = 'SELECT c.relname AS "Name"'
+            . ' FROM pg_class c, pg_user u'
+            . ' WHERE c.relowner = u.usesysid'
+            . " AND c.relkind = 'r'"
+            . ' AND NOT EXISTS'
+            . ' (SELECT 1 FROM pg_views'
+            . '  WHERE viewname = c.relname)'
+            . " AND c.relname !~ '^(pg_|sql_)'"
+            . ' UNION'
+            . ' SELECT c.relname AS "Name"'
+            . ' FROM pg_class c'
+            . " WHERE c.relkind = 'r'"
+            . ' AND NOT EXISTS'
+            . ' (SELECT 1 FROM pg_views'
+            . '  WHERE viewname = c.relname)'
+            . ' AND NOT EXISTS'
+            . ' (SELECT 1 FROM pg_user'
+            . '  WHERE usesysid = c.relowner)'
+            . " AND c.relname !~ '^pg_'";
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listTableFields()
+
+    /**
+     * list all fields in a table in the current database
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of field names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableFields($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        list($schema, $table) = $this->splitTableSchema($table);
+
+        $table = $db->quoteIdentifier($table, true);
+        if (!empty($schema)) {
+            $table = $db->quoteIdentifier($schema, true) . '.' .$table;
+        }
+        $db->setLimit(1);
+        $result2 = $db->query("SELECT * FROM $table");
+        if (PEAR::isError($result2)) {
+            return $result2;
+        }
+        $result = $result2->getColumnNames();
+        $result2->free();
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        return array_flip($result);
+    }
+
+    // }}}
+    // {{{ listTableIndexes()
+
+    /**
+     * list all indexes in a table
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of index names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableIndexes($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        list($schema, $table) = $this->splitTableSchema($table);
+
+        $table = $db->quote($table, 'text');
+        $subquery = "SELECT indexrelid
+                       FROM pg_index
+                  LEFT JOIN pg_class ON pg_class.oid = pg_index.indrelid
+                  LEFT JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
+                      WHERE pg_class.relname = $table
+                        AND indisunique != 't'
+                        AND indisprimary != 't'";
+        if (!empty($schema)) {
+            $subquery .= ' AND pg_namespace.nspname = '.$db->quote($schema, 'text');
+        }
+        $query = "SELECT relname FROM pg_class WHERE oid IN ($subquery)";
+        $indexes = $db->queryCol($query, 'text');
+        if (PEAR::isError($indexes)) {
+            return $indexes;
+        }
+
+        $result = array();
+        foreach ($indexes as $index) {
+            $index = $this->_fixIndexName($index);
+            if (!empty($index)) {
+                $result[$index] = true;
+            }
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_change_key_case($result, $db->options['field_case']);
+        }
+        return array_keys($result);
+    }
+
+    // }}}
+    // {{{ dropConstraint()
+
+    /**
+     * drop existing constraint
+     *
+     * @param string $table   name of table that should be used in method
+     * @param string $name    name of the constraint to be dropped
+     * @param string $primary hint if the constraint is primary
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropConstraint($table, $name, $primary = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        // is it an UNIQUE index?
+        $query = 'SELECT relname
+                    FROM pg_class
+                   WHERE oid IN (
+                         SELECT indexrelid
+                           FROM pg_index, pg_class
+                          WHERE pg_class.relname = '.$db->quote($table, 'text').'
+                            AND pg_class.oid = pg_index.indrelid
+                            AND indisunique = \'t\')
+                  EXCEPT
+                  SELECT conname
+                   FROM pg_constraint, pg_class
+                  WHERE pg_constraint.conrelid = pg_class.oid
+                    AND relname = '. $db->quote($table, 'text');
+        $unique = $db->queryCol($query, 'text');
+        if (PEAR::isError($unique) || empty($unique)) {
+            // not an UNIQUE index, maybe a CONSTRAINT
+            return parent::dropConstraint($table, $name, $primary);
+        }
+
+        if (in_array($name, $unique)) {
+            return $db->exec('DROP INDEX '.$db->quoteIdentifier($name, true));
+        }
+        $idxname = $db->getIndexName($name);
+        if (in_array($idxname, $unique)) {
+            return $db->exec('DROP INDEX '.$db->quoteIdentifier($idxname, true));
+        }
+        return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+            $name . ' is not an existing constraint for table ' . $table, __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listTableConstraints()
+
+    /**
+     * list all constraints in a table
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of constraint names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableConstraints($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        list($schema, $table) = $this->splitTableSchema($table);
+
+        $table = $db->quote($table, 'text');
+        $query = 'SELECT conname
+                    FROM pg_constraint
+               LEFT JOIN pg_class ON pg_constraint.conrelid = pg_class.oid
+               LEFT JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
+                   WHERE relname = ' .$table;
+        if (!empty($schema)) {
+            $query .= ' AND pg_namespace.nspname = ' . $db->quote($schema, 'text');
+        }
+        $query .= '
+                   UNION DISTINCT
+                  SELECT relname
+                    FROM pg_class
+                   WHERE oid IN (
+                         SELECT indexrelid
+                           FROM pg_index
+                      LEFT JOIN pg_class ON pg_class.oid = pg_index.indrelid
+                      LEFT JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
+                          WHERE pg_class.relname = '.$table.'
+                            AND indisunique = \'t\'';
+        if (!empty($schema)) {
+            $query .= ' AND pg_namespace.nspname = ' . $db->quote($schema, 'text');
+        }
+        $query .= ')';
+        $constraints = $db->queryCol($query);
+        if (PEAR::isError($constraints)) {
+            return $constraints;
+        }
+
+        $result = array();
+        foreach ($constraints as $constraint) {
+            $constraint = $this->_fixIndexName($constraint);
+            if (!empty($constraint)) {
+                $result[$constraint] = true;
+            }
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
+            && $db->options['field_case'] == CASE_LOWER
+        ) {
+            $result = array_change_key_case($result, $db->options['field_case']);
+        }
+        return array_keys($result);
+    }
+
+    // }}}
+    // {{{ createSequence()
+
+    /**
+     * create sequence
+     *
+     * @param string $seq_name name of the sequence to be created
+     * @param string $start start value of the sequence; default is 1
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createSequence($seq_name, $start = 1)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $sequence_name = $db->quoteIdentifier($db->getSequenceName($seq_name), true);
+        return $db->exec("CREATE SEQUENCE $sequence_name INCREMENT 1".
+            ($start < 1 ? " MINVALUE $start" : '')." START $start");
+    }
+
+    // }}}
+    // {{{ dropSequence()
+
+    /**
+     * drop existing sequence
+     *
+     * @param string $seq_name name of the sequence to be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropSequence($seq_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $sequence_name = $db->quoteIdentifier($db->getSequenceName($seq_name), true);
+        return $db->exec("DROP SEQUENCE $sequence_name");
+    }
+
+    // }}}
+    // {{{ listSequences()
+
+    /**
+     * list all sequences in the current database
+     *
+     * @return mixed array of sequence names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listSequences()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT relname FROM pg_class WHERE relkind = 'S' AND relnamespace IN";
+        $query.= "(SELECT oid FROM pg_namespace WHERE nspname NOT LIKE 'pg_%' AND nspname != 'information_schema')";
+        $table_names = $db->queryCol($query);
+        if (PEAR::isError($table_names)) {
+            return $table_names;
+        }
+        $result = array();
+        foreach ($table_names as $table_name) {
+            $result[] = $this->_fixSequenceName($table_name);
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Manager/sqlite.php b/inc/MDB2/Driver/Manager/sqlite.php
new file mode 100755
index 00000000000..a0f899e7888
--- /dev/null
+++ b/inc/MDB2/Driver/Manager/sqlite.php
@@ -0,0 +1,1362 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith, Lorenzo Alberton                       |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Authors: Lukas Smith <smith@pooteeweet.org>                          |
+// |          Lorenzo Alberton <l.alberton@quipo.it>                      |
+// +----------------------------------------------------------------------+
+//
+// $Id: sqlite.php,v 1.76 2008/05/31 11:48:48 quipo Exp $
+//
+
+require_once 'MDB2/Driver/Manager/Common.php';
+
+/**
+ * MDB2 SQLite driver for the management modules
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ * @author  Lorenzo Alberton <l.alberton@quipo.it>
+ */
+class MDB2_Driver_Manager_sqlite extends MDB2_Driver_Manager_Common
+{
+    // {{{ createDatabase()
+
+    /**
+     * create a new database
+     *
+     * @param string $name    name of the database that should be created
+     * @param array  $options array with charset info
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createDatabase($name, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $database_file = $db->_getDatabaseFile($name);
+        if (file_exists($database_file)) {
+            return $db->raiseError(MDB2_ERROR_ALREADY_EXISTS, null, null,
+                'database already exists', __FUNCTION__);
+        }
+        $php_errormsg = '';
+        $handle = @sqlite_open($database_file, $db->dsn['mode'], $php_errormsg);
+        if (!$handle) {
+            return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
+                (isset($php_errormsg) ? $php_errormsg : 'could not create the database file'), __FUNCTION__);
+        }
+        if (!empty($options['charset'])) {
+            $query = 'PRAGMA encoding = ' . $db->quote($options['charset'], 'text');
+            @sqlite_query($query, $handle);
+        }
+        @sqlite_close($handle);
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ dropDatabase()
+
+    /**
+     * drop an existing database
+     *
+     * @param string $name name of the database that should be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropDatabase($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $database_file = $db->_getDatabaseFile($name);
+        if (!@file_exists($database_file)) {
+            return $db->raiseError(MDB2_ERROR_CANNOT_DROP, null, null,
+                'database does not exist', __FUNCTION__);
+        }
+        $result = @unlink($database_file);
+        if (!$result) {
+            return $db->raiseError(MDB2_ERROR_CANNOT_DROP, null, null,
+                (isset($php_errormsg) ? $php_errormsg : 'could not remove the database file'), __FUNCTION__);
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ _getAdvancedFKOptions()
+
+    /**
+     * Return the FOREIGN KEY query section dealing with non-standard options
+     * as MATCH, INITIALLY DEFERRED, ON UPDATE, ...
+     *
+     * @param array $definition
+     * @return string
+     * @access protected
+     */
+    function _getAdvancedFKOptions($definition)
+    {
+        $query = '';
+        if (!empty($definition['match'])) {
+            $query .= ' MATCH '.$definition['match'];
+        }
+        if (!empty($definition['onupdate']) && (strtoupper($definition['onupdate']) != 'NO ACTION')) {
+            $query .= ' ON UPDATE '.$definition['onupdate'];
+        }
+        if (!empty($definition['ondelete']) && (strtoupper($definition['ondelete']) != 'NO ACTION')) {
+            $query .= ' ON DELETE '.$definition['ondelete'];
+        }
+        if (!empty($definition['deferrable'])) {
+            $query .= ' DEFERRABLE';
+        } else {
+            $query .= ' NOT DEFERRABLE';
+        }
+        if (!empty($definition['initiallydeferred'])) {
+            $query .= ' INITIALLY DEFERRED';
+        } else {
+            $query .= ' INITIALLY IMMEDIATE';
+        }
+        return $query;
+    }
+
+    // }}}
+    // {{{ _getCreateTableQuery()
+
+    /**
+     * Create a basic SQL query for a new table creation
+     * @param string $name   Name of the database that should be created
+     * @param array $fields  Associative array that contains the definition of each field of the new table
+     * @param array $options  An associative array of table options
+     * @return mixed string (the SQL query) on success, a MDB2 error on failure
+     * @see createTable()
+     */
+    function _getCreateTableQuery($name, $fields, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (!$name) {
+            return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
+                'no valid table name specified', __FUNCTION__);
+        }
+        if (empty($fields)) {
+            return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
+                'no fields specified for table "'.$name.'"', __FUNCTION__);
+        }
+        $query_fields = $this->getFieldDeclarationList($fields);
+        if (PEAR::isError($query_fields)) {
+            return $query_fields;
+        }
+        if (!empty($options['primary'])) {
+            $query_fields.= ', PRIMARY KEY ('.implode(', ', array_keys($options['primary'])).')';
+        }
+        if (!empty($options['foreign_keys'])) {
+            foreach ($options['foreign_keys'] as $fkname => $fkdef) {
+                if (empty($fkdef)) {
+                    continue;
+                }
+                $query_fields.= ', CONSTRAINT '.$fkname.' FOREIGN KEY ('.implode(', ', array_keys($fkdef['fields'])).')';
+                $query_fields.= ' REFERENCES '.$fkdef['references']['table'].' ('.implode(', ', array_keys($fkdef['references']['fields'])).')';
+                $query_fields.= $this->_getAdvancedFKOptions($fkdef);
+            }
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        $result = 'CREATE ';
+        if (!empty($options['temporary'])) {
+            $result .= $this->_getTemporaryTableQuery();
+        }
+        $result .= " TABLE $name ($query_fields)";
+        return $result;
+    }
+
+    // }}}
+    // {{{ createTable()
+
+    /**
+     * create a new table
+     *
+     * @param string $name    Name of the database that should be created
+     * @param array  $fields  Associative array that contains the definition
+     *                        of each field of the new table
+     * @param array  $options An associative array of table options
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createTable($name, $fields, $options = array())
+    {
+        $result = parent::createTable($name, $fields, $options);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        // create triggers to enforce FOREIGN KEY constraints
+        if (!empty($options['foreign_keys'])) {
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+            foreach ($options['foreign_keys'] as $fkname => $fkdef) {
+                if (empty($fkdef)) {
+                    continue;
+                }
+                //set actions to default if not set
+                $fkdef['onupdate'] = empty($fkdef['onupdate']) ? $db->options['default_fk_action_onupdate'] : strtoupper($fkdef['onupdate']);
+                $fkdef['ondelete'] = empty($fkdef['ondelete']) ? $db->options['default_fk_action_ondelete'] : strtoupper($fkdef['ondelete']);
+
+                $trigger_names = array(
+                    'insert'    => $fkname.'_insert_trg',
+                    'update'    => $fkname.'_update_trg',
+                    'pk_update' => $fkname.'_pk_update_trg',
+                    'pk_delete' => $fkname.'_pk_delete_trg',
+                );
+                
+                //create the [insert|update] triggers on the FK table
+                $table_fields = array_keys($fkdef['fields']);
+                $referenced_fields = array_keys($fkdef['references']['fields']);
+                $query = 'CREATE TRIGGER %s BEFORE %s ON '.$name
+                        .' FOR EACH ROW BEGIN'
+                        .' SELECT RAISE(ROLLBACK, \'%s on table "'.$name.'" violates FOREIGN KEY constraint "'.$fkname.'"\')'
+                        .' WHERE  (SELECT ';
+                $aliased_fields = array();
+                foreach ($referenced_fields as $field) {
+                    $aliased_fields[] = $fkdef['references']['table'] .'.'.$field .' AS '.$field;
+                }
+                $query .= implode(',', $aliased_fields)
+                       .' FROM '.$fkdef['references']['table']
+                       .' WHERE ';
+                $conditions = array();
+                for ($i=0; $i<count($table_fields); $i++) {
+                    $conditions[] = $referenced_fields[$i] .' = NEW.'.$table_fields[$i];
+                }
+                $query .= implode(' AND ', $conditions).') IS NULL; END;';
+                $result = $db->exec(sprintf($query, $trigger_names['insert'], 'INSERT', 'insert'));
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+
+                $result = $db->exec(sprintf($query, $trigger_names['update'], 'UPDATE', 'update'));
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+                
+                //create the ON [UPDATE|DELETE] triggers on the primary table
+                $restrict_action = 'SELECT RAISE(ROLLBACK, \'%s on table "'.$name.'" violates FOREIGN KEY constraint "'.$fkname.'"\')'
+                                  .' WHERE  (SELECT ';
+                $aliased_fields = array();
+                foreach ($table_fields as $field) {
+                    $aliased_fields[] = $name .'.'.$field .' AS '.$field;
+                }
+                $restrict_action .= implode(',', $aliased_fields)
+                       .' FROM '.$name
+                       .' WHERE ';
+                $conditions  = array();
+                $new_values  = array();
+                $null_values = array();
+                for ($i=0; $i<count($table_fields); $i++) {
+                    $conditions[]  = $table_fields[$i] .' = OLD.'.$referenced_fields[$i];
+                    $new_values[]  = $table_fields[$i] .' = NEW.'.$referenced_fields[$i];
+                    $null_values[] = $table_fields[$i] .' = NULL';
+                }
+                $conditions2 = array();
+                for ($i=0; $i<count($referenced_fields); $i++) {
+                    $conditions2[]  = 'NEW.'.$referenced_fields[$i] .' <> OLD.'.$referenced_fields[$i];
+                }
+                $restrict_action .= implode(' AND ', $conditions).') IS NOT NULL'
+                                 .' AND (' .implode(' OR ', $conditions2) .')';
+
+                $cascade_action_update = 'UPDATE '.$name.' SET '.implode(', ', $new_values) .' WHERE '.implode(' AND ', $conditions);
+                $cascade_action_delete = 'DELETE FROM '.$name.' WHERE '.implode(' AND ', $conditions);
+                $setnull_action        = 'UPDATE '.$name.' SET '.implode(', ', $null_values).' WHERE '.implode(' AND ', $conditions);
+
+                if ('SET DEFAULT' == $fkdef['onupdate'] || 'SET DEFAULT' == $fkdef['ondelete']) {
+                    $db->loadModule('Reverse', null, true);
+                    $default_values = array();
+                    foreach ($table_fields as $table_field) {
+                        $field_definition = $db->reverse->getTableFieldDefinition($name, $field);
+                        if (PEAR::isError($field_definition)) {
+                            return $field_definition;
+                        }
+                        $default_values[] = $table_field .' = '. $field_definition[0]['default'];
+                    }
+                    $setdefault_action = 'UPDATE '.$name.' SET '.implode(', ', $default_values).' WHERE '.implode(' AND ', $conditions);
+                }
+
+                $query = 'CREATE TRIGGER %s'
+                        .' %s ON '.$fkdef['references']['table']
+                        .' FOR EACH ROW BEGIN ';
+
+                if ('CASCADE' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query, $trigger_names['pk_update'], 'AFTER UPDATE',  'update') . $cascade_action_update. '; END;';
+                } elseif ('SET NULL' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query, $trigger_names['pk_update'], 'BEFORE UPDATE', 'update') . $setnull_action. '; END;';
+                } elseif ('SET DEFAULT' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query, $trigger_names['pk_update'], 'BEFORE UPDATE', 'update') . $setdefault_action. '; END;';
+                } elseif ('NO ACTION' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query.$restrict_action, $trigger_names['pk_update'], 'AFTER UPDATE', 'update') . '; END;';
+                } elseif ('RESTRICT' == $fkdef['onupdate']) {
+                    $sql_update = sprintf($query.$restrict_action, $trigger_names['pk_update'], 'BEFORE UPDATE', 'update') . '; END;';
+                }
+                if ('CASCADE' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query, $trigger_names['pk_delete'], 'AFTER DELETE',  'delete') . $cascade_action_delete. '; END;';
+                } elseif ('SET NULL' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query, $trigger_names['pk_delete'], 'BEFORE DELETE', 'delete') . $setnull_action. '; END;';
+                } elseif ('SET DEFAULT' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query, $trigger_names['pk_delete'], 'BEFORE DELETE', 'delete') . $setdefault_action. '; END;';
+                } elseif ('NO ACTION' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query.$restrict_action, $trigger_names['pk_delete'], 'AFTER DELETE', 'delete')  . '; END;';
+                } elseif ('RESTRICT' == $fkdef['ondelete']) {
+                    $sql_delete = sprintf($query.$restrict_action, $trigger_names['pk_delete'], 'BEFORE DELETE', 'delete') . '; END;';
+                }
+
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+                $result = $db->exec($sql_delete);
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+                $result = $db->exec($sql_update);
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+            }
+        }
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ dropTable()
+
+    /**
+     * drop an existing table
+     *
+     * @param string $name name of the table that should be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropTable($name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        
+        //delete the triggers associated to existing FK constraints
+        $constraints = $this->listTableConstraints($name);
+        if (!PEAR::isError($constraints) && !empty($constraints)) {
+            $db->loadModule('Reverse', null, true);
+            foreach ($constraints as $constraint) {
+                $definition = $db->reverse->getTableConstraintDefinition($name, $constraint);
+                if (!PEAR::isError($definition) && !empty($definition['foreign'])) {
+                    $result = $this->_dropFKTriggers($name, $constraint, $definition['references']['table']);
+                    if (PEAR::isError($result)) {
+                        return $result;
+                    }
+                }
+            }
+        }
+
+        $name = $db->quoteIdentifier($name, true);
+        return $db->exec("DROP TABLE $name");
+    }
+
+    // }}}
+    // {{{ vacuum()
+
+    /**
+     * Optimize (vacuum) all the tables in the db (or only the specified table)
+     * and optionally run ANALYZE.
+     *
+     * @param string $table table name (all the tables if empty)
+     * @param array  $options an array with driver-specific options:
+     *               - timeout [int] (in seconds) [mssql-only]
+     *               - analyze [boolean] [pgsql and mysql]
+     *               - full [boolean] [pgsql-only]
+     *               - freeze [boolean] [pgsql-only]
+     *
+     * @return mixed MDB2_OK success, a MDB2 error on failure
+     * @access public
+     */
+    function vacuum($table = null, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'VACUUM';
+        if (!empty($table)) {
+            $query .= ' '.$db->quoteIdentifier($table, true);
+        }
+        return $db->exec($query);
+    }
+
+    // }}}
+    // {{{ alterTable()
+
+    /**
+     * alter an existing table
+     *
+     * @param string $name         name of the table that is intended to be changed.
+     * @param array $changes     associative array that contains the details of each type
+     *                             of change that is intended to be performed. The types of
+     *                             changes that are currently supported are defined as follows:
+     *
+     *                             name
+     *
+     *                                New name for the table.
+     *
+     *                            add
+     *
+     *                                Associative array with the names of fields to be added as
+     *                                 indexes of the array. The value of each entry of the array
+     *                                 should be set to another associative array with the properties
+     *                                 of the fields to be added. The properties of the fields should
+     *                                 be the same as defined by the MDB2 parser.
+     *
+     *
+     *                            remove
+     *
+     *                                Associative array with the names of fields to be removed as indexes
+     *                                 of the array. Currently the values assigned to each entry are ignored.
+     *                                 An empty array should be used for future compatibility.
+     *
+     *                            rename
+     *
+     *                                Associative array with the names of fields to be renamed as indexes
+     *                                 of the array. The value of each entry of the array should be set to
+     *                                 another associative array with the entry named name with the new
+     *                                 field name and the entry named Declaration that is expected to contain
+     *                                 the portion of the field declaration already in DBMS specific SQL code
+     *                                 as it is used in the CREATE TABLE statement.
+     *
+     *                            change
+     *
+     *                                Associative array with the names of the fields to be changed as indexes
+     *                                 of the array. Keep in mind that if it is intended to change either the
+     *                                 name of a field and any other properties, the change array entries
+     *                                 should have the new names of the fields as array indexes.
+     *
+     *                                The value of each entry of the array should be set to another associative
+     *                                 array with the properties of the fields to that are meant to be changed as
+     *                                 array entries. These entries should be assigned to the new values of the
+     *                                 respective properties. The properties of the fields should be the same
+     *                                 as defined by the MDB2 parser.
+     *
+     *                            Example
+     *                                array(
+     *                                    'name' => 'userlist',
+     *                                    'add' => array(
+     *                                        'quota' => array(
+     *                                            'type' => 'integer',
+     *                                            'unsigned' => 1
+     *                                        )
+     *                                    ),
+     *                                    'remove' => array(
+     *                                        'file_limit' => array(),
+     *                                        'time_limit' => array()
+     *                                    ),
+     *                                    'change' => array(
+     *                                        'name' => array(
+     *                                            'length' => '20',
+     *                                            'definition' => array(
+     *                                                'type' => 'text',
+     *                                                'length' => 20,
+     *                                            ),
+     *                                        )
+     *                                    ),
+     *                                    'rename' => array(
+     *                                        'sex' => array(
+     *                                            'name' => 'gender',
+     *                                            'definition' => array(
+     *                                                'type' => 'text',
+     *                                                'length' => 1,
+     *                                                'default' => 'M',
+     *                                            ),
+     *                                        )
+     *                                    )
+     *                                )
+     *
+     * @param boolean $check     indicates whether the function should just check if the DBMS driver
+     *                             can perform the requested table alterations if the value is true or
+     *                             actually perform them otherwise.
+     * @access public
+     *
+      * @return mixed MDB2_OK on success, a MDB2 error on failure
+     */
+    function alterTable($name, $changes, $check, $options = array())
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        foreach ($changes as $change_name => $change) {
+            switch ($change_name) {
+            case 'add':
+            case 'remove':
+            case 'change':
+            case 'name':
+            case 'rename':
+                break;
+            default:
+                return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
+                    'change type "'.$change_name.'" not yet supported', __FUNCTION__);
+            }
+        }
+
+        if ($check) {
+            return MDB2_OK;
+        }
+
+        $db->loadModule('Reverse', null, true);
+
+        // actually sqlite 2.x supports no ALTER TABLE at all .. so we emulate it
+        $fields = $db->manager->listTableFields($name);
+        if (PEAR::isError($fields)) {
+            return $fields;
+        }
+
+        $fields = array_flip($fields);
+        foreach ($fields as $field => $value) {
+            $definition = $db->reverse->getTableFieldDefinition($name, $field);
+            if (PEAR::isError($definition)) {
+                return $definition;
+            }
+            $fields[$field] = $definition[0];
+        }
+
+        $indexes = $db->manager->listTableIndexes($name);
+        if (PEAR::isError($indexes)) {
+            return $indexes;
+        }
+
+        $indexes = array_flip($indexes);
+        foreach ($indexes as $index => $value) {
+            $definition = $db->reverse->getTableIndexDefinition($name, $index);
+            if (PEAR::isError($definition)) {
+                return $definition;
+            }
+            $indexes[$index] = $definition;
+        }
+
+        $constraints = $db->manager->listTableConstraints($name);
+        if (PEAR::isError($constraints)) {
+            return $constraints;
+        }
+
+        if (!array_key_exists('foreign_keys', $options)) {
+            $options['foreign_keys'] = array();
+        }
+        $constraints = array_flip($constraints);
+        foreach ($constraints as $constraint => $value) {
+            if (!empty($definition['primary'])) {
+                if (!array_key_exists('primary', $options)) {
+                    $options['primary'] = $definition['fields'];
+                    //remove from the $constraint array, it's already handled by createTable()
+                    unset($constraints[$constraint]);
+                }
+            } else {
+                $c_definition = $db->reverse->getTableConstraintDefinition($name, $constraint);
+                if (PEAR::isError($c_definition)) {
+                    return $c_definition;
+                }
+                if (!empty($c_definition['foreign'])) {
+                    if (!array_key_exists($constraint, $options['foreign_keys'])) {
+                        $options['foreign_keys'][$constraint] = $c_definition;
+                    }
+                    //remove from the $constraint array, it's already handled by createTable()
+                    unset($constraints[$constraint]);
+                } else {
+                    $constraints[$constraint] = $c_definition;
+                }
+            }
+        }
+
+        $name_new = $name;
+        $create_order = $select_fields = array_keys($fields);
+        foreach ($changes as $change_name => $change) {
+            switch ($change_name) {
+            case 'add':
+                foreach ($change as $field_name => $field) {
+                    $fields[$field_name] = $field;
+                    $create_order[] = $field_name;
+                }
+                break;
+            case 'remove':
+                foreach ($change as $field_name => $field) {
+                    unset($fields[$field_name]);
+                    $select_fields = array_diff($select_fields, array($field_name));
+                    $create_order = array_diff($create_order, array($field_name));
+                }
+                break;
+            case 'change':
+                foreach ($change as $field_name => $field) {
+                    $fields[$field_name] = $field['definition'];
+                }
+                break;
+            case 'name':
+                $name_new = $change;
+                break;
+            case 'rename':
+                foreach ($change as $field_name => $field) {
+                    unset($fields[$field_name]);
+                    $fields[$field['name']] = $field['definition'];
+                    $create_order[array_search($field_name, $create_order)] = $field['name'];
+                }
+                break;
+            default:
+                return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
+                    'change type "'.$change_name.'" not yet supported', __FUNCTION__);
+            }
+        }
+
+        $data = null;
+        if (!empty($select_fields)) {
+            $query = 'SELECT '.implode(', ', $select_fields).' FROM '.$db->quoteIdentifier($name, true);
+            $data = $db->queryAll($query, null, MDB2_FETCHMODE_ORDERED);
+        }
+
+        $result = $this->dropTable($name);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+
+        $result = $this->createTable($name_new, $fields, $options);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+
+        foreach ($indexes as $index => $definition) {
+            $this->createIndex($name_new, $index, $definition);
+        }
+
+        foreach ($constraints as $constraint => $definition) {
+            $this->createConstraint($name_new, $constraint, $definition);
+        }
+
+        if (!empty($select_fields) && !empty($data)) {
+            $query = 'INSERT INTO '.$db->quoteIdentifier($name_new, true);
+            $query.= '('.implode(', ', array_slice(array_keys($fields), 0, count($select_fields))).')';
+            $query.=' VALUES (?'.str_repeat(', ?', (count($select_fields) - 1)).')';
+            $stmt =& $db->prepare($query, null, MDB2_PREPARE_MANIP);
+            if (PEAR::isError($stmt)) {
+                return $stmt;
+            }
+            foreach ($data as $row) {
+                $result = $stmt->execute($row);
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+            }
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ listDatabases()
+
+    /**
+     * list all databases
+     *
+     * @return mixed array of database names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listDatabases()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'list databases is not supported', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listUsers()
+
+    /**
+     * list all users
+     *
+     * @return mixed array of user names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listUsers()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'list databases is not supported', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ listViews()
+
+    /**
+     * list all views in the current database
+     *
+     * @return mixed array of view names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listViews()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT name FROM sqlite_master WHERE type='view' AND sql NOT NULL";
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listTableViews()
+
+    /**
+     * list the views in the database that reference a given table
+     *
+     * @param string table for which all referenced views should be found
+     * @return mixed array of view names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableViews($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT name, sql FROM sqlite_master WHERE type='view' AND sql NOT NULL";
+        $views = $db->queryAll($query, array('text', 'text'), MDB2_FETCHMODE_ASSOC);
+        if (PEAR::isError($views)) {
+            return $views;
+        }
+        $result = array();
+        foreach ($views as $row) {
+            if (preg_match("/^create view .* \bfrom\b\s+\b{$table}\b /i", $row['sql'])) {
+                if (!empty($row['name'])) {
+                    $result[$row['name']] = true;
+                }
+            }
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_change_key_case($result, $db->options['field_case']);
+        }
+        return array_keys($result);
+    }
+
+    // }}}
+    // {{{ listTables()
+
+    /**
+     * list all tables in the current database
+     *
+     * @return mixed array of table names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTables()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT name FROM sqlite_master WHERE type='table' AND sql NOT NULL ORDER BY name";
+        $table_names = $db->queryCol($query);
+        if (PEAR::isError($table_names)) {
+            return $table_names;
+        }
+        $result = array();
+        foreach ($table_names as $table_name) {
+            if (!$this->_fixSequenceName($table_name, true)) {
+                $result[] = $table_name;
+            }
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ listTableFields()
+
+    /**
+     * list all fields in a table in the current database
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of field names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableFields($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $result = $db->loadModule('Reverse', null, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $query.= 'LOWER(name)='.$db->quote(strtolower($table), 'text');
+        } else {
+            $query.= 'name='.$db->quote($table, 'text');
+        }
+        $sql = $db->queryOne($query);
+        if (PEAR::isError($sql)) {
+            return $sql;
+        }
+        $columns = $db->reverse->_getTableColumns($sql);
+        $fields = array();
+        foreach ($columns as $column) {
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                if ($db->options['field_case'] == CASE_LOWER) {
+                    $column['name'] = strtolower($column['name']);
+                } else {
+                    $column['name'] = strtoupper($column['name']);
+                }
+            } else {
+                $column = array_change_key_case($column, $db->options['field_case']);
+            }
+            $fields[] = $column['name'];
+        }
+        return $fields;
+    }
+
+    // }}}
+    // {{{ listTableTriggers()
+
+    /**
+     * list all triggers in the database that reference a given table
+     *
+     * @param string table for which all referenced triggers should be found
+     * @return mixed array of trigger names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableTriggers($table = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT name FROM sqlite_master WHERE type='trigger' AND sql NOT NULL";
+        if (!is_null($table)) {
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                $query.= ' AND LOWER(tbl_name)='.$db->quote(strtolower($table), 'text');
+            } else {
+                $query.= ' AND tbl_name='.$db->quote($table, 'text');
+            }
+        }
+        $result = $db->queryCol($query);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ createIndex()
+
+    /**
+     * Get the stucture of a field into an array
+     *
+     * @param string    $table         name of the table on which the index is to be created
+     * @param string    $name         name of the index to be created
+     * @param array     $definition        associative array that defines properties of the index to be created.
+     *                                 Currently, only one property named FIELDS is supported. This property
+     *                                 is also an associative with the names of the index fields as array
+     *                                 indexes. Each entry of this array is set to another type of associative
+     *                                 array that specifies properties of the index that are specific to
+     *                                 each field.
+     *
+     *                                Currently, only the sorting property is supported. It should be used
+     *                                 to define the sorting direction of the index. It may be set to either
+     *                                 ascending or descending.
+     *
+     *                                Not all DBMS support index sorting direction configuration. The DBMS
+     *                                 drivers of those that do not support it ignore this property. Use the
+     *                                 function support() to determine whether the DBMS driver can manage indexes.
+
+     *                                 Example
+     *                                    array(
+     *                                        'fields' => array(
+     *                                            'user_name' => array(
+     *                                                'sorting' => 'ascending'
+     *                                            ),
+     *                                            'last_login' => array()
+     *                                        )
+     *                                    )
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createIndex($table, $name, $definition)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $table = $db->quoteIdentifier($table, true);
+        $name  = $db->getIndexName($name);
+        $query = "CREATE INDEX $name ON $table";
+        $fields = array();
+        foreach ($definition['fields'] as $field_name => $field) {
+            $field_string = $field_name;
+            if (!empty($field['sorting'])) {
+                switch ($field['sorting']) {
+                case 'ascending':
+                    $field_string.= ' ASC';
+                    break;
+                case 'descending':
+                    $field_string.= ' DESC';
+                    break;
+                }
+            }
+            $fields[] = $field_string;
+        }
+        $query .= ' ('.implode(', ', $fields) . ')';
+        return $db->exec($query);
+    }
+
+    // }}}
+    // {{{ dropIndex()
+
+    /**
+     * drop existing index
+     *
+     * @param string    $table         name of table that should be used in method
+     * @param string    $name         name of the index to be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropIndex($table, $name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $name = $db->getIndexName($name);
+        return $db->exec("DROP INDEX $name");
+    }
+
+    // }}}
+    // {{{ listTableIndexes()
+
+    /**
+     * list all indexes in a table
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of index names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableIndexes($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $table = $db->quote($table, 'text');
+        $query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $query.= 'LOWER(tbl_name)='.strtolower($table);
+        } else {
+            $query.= "tbl_name=$table";
+        }
+        $query.= " AND sql NOT NULL ORDER BY name";
+        $indexes = $db->queryCol($query, 'text');
+        if (PEAR::isError($indexes)) {
+            return $indexes;
+        }
+
+        $result = array();
+        foreach ($indexes as $sql) {
+            if (preg_match("/^create index ([^ ]+) on /i", $sql, $tmp)) {
+                $index = $this->_fixIndexName($tmp[1]);
+                if (!empty($index)) {
+                    $result[$index] = true;
+                }
+            }
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_change_key_case($result, $db->options['field_case']);
+        }
+        return array_keys($result);
+    }
+
+    // }}}
+    // {{{ createConstraint()
+
+    /**
+     * create a constraint on a table
+     *
+     * @param string $table      name of the table on which the constraint is to be created
+     * @param string $name       name of the constraint to be created
+     * @param array  $definition associative array that defines properties of the constraint to be created.
+     *                           Currently, only one property named FIELDS is supported. This property
+     *                           is also an associative with the names of the constraint fields as array
+     *                           constraints. Each entry of this array is set to another type of associative
+     *                           array that specifies properties of the constraint that are specific to
+     *                           each field.
+     *
+     *                           Example
+     *                              array(
+     *                                  'fields' => array(
+     *                                      'user_name' => array(),
+     *                                      'last_login' => array()
+     *                                  )
+     *                              )
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createConstraint($table, $name, $definition)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (!empty($definition['primary'])) {
+            return $db->manager->alterTable($table, array(), false, array('primary' => $definition['fields']));
+        }
+        
+        if (!empty($definition['foreign'])) {
+            return $db->manager->alterTable($table, array(), false, array('foreign_keys' => array($name => $definition)));
+        }
+
+        $table = $db->quoteIdentifier($table, true);
+        $name  = $db->getIndexName($name);
+        $query = "CREATE UNIQUE INDEX $name ON $table";
+        $fields = array();
+        foreach ($definition['fields'] as $field_name => $field) {
+            $field_string = $field_name;
+            if (!empty($field['sorting'])) {
+                switch ($field['sorting']) {
+                case 'ascending':
+                    $field_string.= ' ASC';
+                    break;
+                case 'descending':
+                    $field_string.= ' DESC';
+                    break;
+                }
+            }
+            $fields[] = $field_string;
+        }
+        $query .= ' ('.implode(', ', $fields) . ')';
+        return $db->exec($query);
+    }
+
+    // }}}
+    // {{{ dropConstraint()
+
+    /**
+     * drop existing constraint
+     *
+     * @param string    $table        name of table that should be used in method
+     * @param string    $name         name of the constraint to be dropped
+     * @param string    $primary      hint if the constraint is primary
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropConstraint($table, $name, $primary = false)
+    {
+        if ($primary || $name == 'PRIMARY') {
+            return $this->alterTable($table, array(), false, array('primary' => null));
+        }
+
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        //is it a FK constraint? If so, also delete the associated triggers
+        $db->loadModule('Reverse', null, true);
+        $definition = $db->reverse->getTableConstraintDefinition($table, $name);
+        if (!PEAR::isError($definition) && !empty($definition['foreign'])) {
+            //first drop the FK enforcing triggers
+            $result = $this->_dropFKTriggers($table, $name, $definition['references']['table']);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            //then drop the constraint itself
+            return $this->alterTable($table, array(), false, array('foreign_keys' => array($name => null)));
+        }
+
+        $name = $db->getIndexName($name);
+        return $db->exec("DROP INDEX $name");
+    }
+
+    // }}}
+    // {{{ _dropFKTriggers()
+    
+    /**
+     * Drop the triggers created to enforce the FOREIGN KEY constraint on the table
+     *
+     * @param string $table  table name
+     * @param string $fkname FOREIGN KEY constraint name
+     * @param string $referenced_table  referenced table name
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access private
+     */
+    function _dropFKTriggers($table, $fkname, $referenced_table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $triggers  = $this->listTableTriggers($table);
+        $triggers2 = $this->listTableTriggers($referenced_table);
+        if (!PEAR::isError($triggers2) && !PEAR::isError($triggers)) {
+            $triggers = array_merge($triggers, $triggers2);
+            $pattern = '/^'.$fkname.'(_pk)?_(insert|update|delete)_trg$/i';
+            foreach ($triggers as $trigger) {
+                if (preg_match($pattern, $trigger)) {
+                    $result = $db->exec('DROP TRIGGER '.$trigger);
+                    if (PEAR::isError($result)) {
+                        return $result;
+                    }
+                }
+            }
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ listTableConstraints()
+
+    /**
+     * list all constraints in a table
+     *
+     * @param string $table name of table that should be used in method
+     * @return mixed array of constraint names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listTableConstraints($table)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $table = $db->quote($table, 'text');
+        $query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $query.= 'LOWER(tbl_name)='.strtolower($table);
+        } else {
+            $query.= "tbl_name=$table";
+        }
+        $query.= " AND sql NOT NULL ORDER BY name";
+        $indexes = $db->queryCol($query, 'text');
+        if (PEAR::isError($indexes)) {
+            return $indexes;
+        }
+
+        $result = array();
+        foreach ($indexes as $sql) {
+            if (preg_match("/^create unique index ([^ ]+) on /i", $sql, $tmp)) {
+                $index = $this->_fixIndexName($tmp[1]);
+                if (!empty($index)) {
+                    $result[$index] = true;
+                }
+            }
+        }
+        
+        // also search in table definition for PRIMARY KEYs...
+        $query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $query.= 'LOWER(name)='.strtolower($table);
+        } else {
+            $query.= "name=$table";
+        }
+        $query.= " AND sql NOT NULL ORDER BY name";
+        $table_def = $db->queryOne($query, 'text');
+        if (PEAR::isError($table_def)) {
+            return $table_def;
+        }
+        if (preg_match("/\bPRIMARY\s+KEY\b/i", $table_def, $tmp)) {
+            $result['primary'] = true;
+        }
+
+        // ...and for FOREIGN KEYs
+        if (preg_match_all("/\bCONSTRAINT\b\s+([^\s]+)\s+\bFOREIGN\s+KEY/imsx", $table_def, $tmp)) {
+            foreach ($tmp[1] as $fk) {
+                $result[$fk] = true;
+            }
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_change_key_case($result, $db->options['field_case']);
+        }
+        return array_keys($result);
+    }
+
+    // }}}
+    // {{{ createSequence()
+
+    /**
+     * create sequence
+     *
+     * @param string    $seq_name     name of the sequence to be created
+     * @param string    $start         start value of the sequence; default is 1
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function createSequence($seq_name, $start = 1)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $sequence_name = $db->quoteIdentifier($db->getSequenceName($seq_name), true);
+        $seqcol_name = $db->quoteIdentifier($db->options['seqcol_name'], true);
+        $query = "CREATE TABLE $sequence_name ($seqcol_name INTEGER PRIMARY KEY DEFAULT 0 NOT NULL)";
+        $res = $db->exec($query);
+        if (PEAR::isError($res)) {
+            return $res;
+        }
+        if ($start == 1) {
+            return MDB2_OK;
+        }
+        $res = $db->exec("INSERT INTO $sequence_name ($seqcol_name) VALUES (".($start-1).')');
+        if (!PEAR::isError($res)) {
+            return MDB2_OK;
+        }
+        // Handle error
+        $result = $db->exec("DROP TABLE $sequence_name");
+        if (PEAR::isError($result)) {
+            return $db->raiseError($result, null, null,
+                'could not drop inconsistent sequence table', __FUNCTION__);
+        }
+        return $db->raiseError($res, null, null,
+            'could not create sequence table', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ dropSequence()
+
+    /**
+     * drop existing sequence
+     *
+     * @param string    $seq_name     name of the sequence to be dropped
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function dropSequence($seq_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $sequence_name = $db->quoteIdentifier($db->getSequenceName($seq_name), true);
+        return $db->exec("DROP TABLE $sequence_name");
+    }
+
+    // }}}
+    // {{{ listSequences()
+
+    /**
+     * list all sequences in the current database
+     *
+     * @return mixed array of sequence names on success, a MDB2 error on failure
+     * @access public
+     */
+    function listSequences()
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT name FROM sqlite_master WHERE type='table' AND sql NOT NULL ORDER BY name";
+        $table_names = $db->queryCol($query);
+        if (PEAR::isError($table_names)) {
+            return $table_names;
+        }
+        $result = array();
+        foreach ($table_names as $table_name) {
+            if ($sqn = $this->_fixSequenceName($table_name, true)) {
+                $result[] = $sqn;
+            }
+        }
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
+        }
+        return $result;
+    }
+
+    // }}}
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Native/Common.php b/inc/MDB2/Driver/Native/Common.php
new file mode 100755
index 00000000000..c01caa35b71
--- /dev/null
+++ b/inc/MDB2/Driver/Native/Common.php
@@ -0,0 +1,61 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: Common.php,v 1.2 2007/09/09 13:47:36 quipo Exp $
+//
+
+/**
+ * Base class for the natuve modules that is extended by each MDB2 driver
+ *
+ * To load this module in the MDB2 object:
+ * $mdb->loadModule('Native');
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Native_Common extends MDB2_Module_Common
+{
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Native/mysql.php b/inc/MDB2/Driver/Native/mysql.php
new file mode 100755
index 00000000000..90ff068e6ff
--- /dev/null
+++ b/inc/MDB2/Driver/Native/mysql.php
@@ -0,0 +1,60 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: mysql.php,v 1.9 2006/06/18 21:59:05 lsmith Exp $
+//
+
+require_once 'MDB2/Driver/Native/Common.php';
+
+/**
+ * MDB2 MySQL driver for the native module
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Native_mysql extends MDB2_Driver_Native_Common
+{
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Native/pgsql.php b/inc/MDB2/Driver/Native/pgsql.php
new file mode 100755
index 00000000000..acab8389c89
--- /dev/null
+++ b/inc/MDB2/Driver/Native/pgsql.php
@@ -0,0 +1,88 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Paul Cooper <pgc@ucecom.com>                                 |
+// +----------------------------------------------------------------------+
+//
+// $Id: pgsql.php,v 1.12 2006/07/15 13:07:15 lsmith Exp $
+
+require_once 'MDB2/Driver/Native/Common.php';
+
+/**
+ * MDB2 PostGreSQL driver for the native module
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Driver_Native_pgsql extends MDB2_Driver_Native_Common
+{
+    // }}}
+    // {{{ deleteOID()
+
+    /**
+     * delete an OID
+     *
+     * @param integer    $OID
+     * @return mixed MDB2_OK on success or MDB2 Error Object on failure
+     * @access public
+     */
+    function deleteOID($OID)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $connection = $db->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        if (!@pg_lo_unlink($connection, $OID)) {
+            return $db->raiseError(null, null, null,
+                'Unable to unlink OID: '.$OID, __FUNCTION__);
+        }
+        return MDB2_OK;
+    }
+
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Native/sqlite.php b/inc/MDB2/Driver/Native/sqlite.php
new file mode 100755
index 00000000000..0213293a50a
--- /dev/null
+++ b/inc/MDB2/Driver/Native/sqlite.php
@@ -0,0 +1,60 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: sqlite.php,v 1.9 2006/06/18 21:59:05 lsmith Exp $
+//
+
+require_once 'MDB2/Driver/Native/Common.php';
+
+/**
+ * MDB2 SQLite driver for the native module
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Native_sqlite extends MDB2_Driver_Native_Common
+{
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Reverse/Common.php b/inc/MDB2/Driver/Reverse/Common.php
new file mode 100755
index 00000000000..7ce9c744262
--- /dev/null
+++ b/inc/MDB2/Driver/Reverse/Common.php
@@ -0,0 +1,517 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: Common.php,v 1.43 2009/01/14 15:01:21 quipo Exp $
+//
+
+/**
+ * @package MDB2
+ * @category Database
+ */
+
+/**
+ * These are constants for the tableInfo-function
+ * they are bitwised or'ed. so if there are more constants to be defined
+ * in the future, adjust MDB2_TABLEINFO_FULL accordingly
+ */
+
+define('MDB2_TABLEINFO_ORDER',      1);
+define('MDB2_TABLEINFO_ORDERTABLE', 2);
+define('MDB2_TABLEINFO_FULL',       3);
+
+/**
+ * Base class for the schema reverse engineering module that is extended by each MDB2 driver
+ *
+ * To load this module in the MDB2 object:
+ * $mdb->loadModule('Reverse');
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Reverse_Common extends MDB2_Module_Common
+{
+    // {{{ splitTableSchema()
+
+    /**
+     * Split the "[owner|schema].table" notation into an array
+     *
+     * @param string $table [schema and] table name
+     *
+     * @return array array(schema, table)
+     * @access private
+     */
+    function splitTableSchema($table)
+    {
+        $ret = array();
+        if (strpos($table, '.') !== false) {
+            return explode('.', $table);
+        }
+        return array(null, $table);
+    }
+
+    // }}}
+    // {{{ getTableFieldDefinition()
+
+    /**
+     * Get the structure of a field into an array
+     *
+     * @param string    $table     name of table that should be used in method
+     * @param string    $field     name of field that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure.
+     *          The returned array contains an array for each field definition,
+     *          with all or some of these indices, depending on the field data type:
+     *          [notnull] [nativetype] [length] [fixed] [default] [type] [mdb2type]
+     * @access public
+     */
+    function getTableFieldDefinition($table, $field)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ getTableIndexDefinition()
+
+    /**
+     * Get the structure of an index into an array
+     *
+     * @param string    $table      name of table that should be used in method
+     * @param string    $index      name of index that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     *          The returned array has this structure:
+     *          </pre>
+     *          array (
+     *              [fields] => array (
+     *                  [field1name] => array() // one entry per each field covered
+     *                  [field2name] => array() // by the index
+     *                  [field3name] => array(
+     *                      [sorting] => ascending
+     *                  )
+     *              )
+     *          );
+     *          </pre>
+     * @access public
+     */
+    function getTableIndexDefinition($table, $index)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ getTableConstraintDefinition()
+
+    /**
+     * Get the structure of an constraints into an array
+     *
+     * @param string    $table      name of table that should be used in method
+     * @param string    $index      name of index that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     *          The returned array has this structure:
+     *          <pre>
+     *          array (
+     *              [primary] => 0
+     *              [unique]  => 0
+     *              [foreign] => 1
+     *              [check]   => 0
+     *              [fields] => array (
+     *                  [field1name] => array() // one entry per each field covered
+     *                  [field2name] => array() // by the index
+     *                  [field3name] => array(
+     *                      [sorting]  => ascending
+     *                      [position] => 3
+     *                  )
+     *              )
+     *              [references] => array(
+     *                  [table] => name
+     *                  [fields] => array(
+     *                      [field1name] => array(  //one entry per each referenced field
+     *                           [position] => 1
+     *                      )
+     *                  )
+     *              )
+     *              [deferrable] => 0
+     *              [initiallydeferred] => 0
+     *              [onupdate] => CASCADE|RESTRICT|SET NULL|SET DEFAULT|NO ACTION
+     *              [ondelete] => CASCADE|RESTRICT|SET NULL|SET DEFAULT|NO ACTION
+     *              [match] => SIMPLE|PARTIAL|FULL
+     *          );
+     *          </pre>
+     * @access public
+     */
+    function getTableConstraintDefinition($table, $index)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ getSequenceDefinition()
+
+    /**
+     * Get the structure of a sequence into an array
+     *
+     * @param string    $sequence   name of sequence that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     *          The returned array has this structure:
+     *          <pre>
+     *          array (
+     *              [start] => n
+     *          );
+     *          </pre>
+     * @access public
+     */
+    function getSequenceDefinition($sequence)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $start = $db->currId($sequence);
+        if (PEAR::isError($start)) {
+            return $start;
+        }
+        if ($db->supports('current_id')) {
+            $start++;
+        } else {
+            $db->warnings[] = 'database does not support getting current
+                sequence value, the sequence value was incremented';
+        }
+        $definition = array();
+        if ($start != 1) {
+            $definition = array('start' => $start);
+        }
+        return $definition;
+    }
+
+    // }}}
+    // {{{ getTriggerDefinition()
+
+    /**
+     * Get the structure of a trigger into an array
+     *
+     * EXPERIMENTAL
+     *
+     * WARNING: this function is experimental and may change the returned value 
+     * at any time until labelled as non-experimental
+     *
+     * @param string    $trigger    name of trigger that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     *          The returned array has this structure:
+     *          <pre>
+     *          array (
+     *              [trigger_name]    => 'trigger name',
+     *              [table_name]      => 'table name',
+     *              [trigger_body]    => 'trigger body definition',
+     *              [trigger_type]    => 'BEFORE' | 'AFTER',
+     *              [trigger_event]   => 'INSERT' | 'UPDATE' | 'DELETE'
+     *                  //or comma separated list of multiple events, when supported
+     *              [trigger_enabled] => true|false
+     *              [trigger_comment] => 'trigger comment',
+     *          );
+     *          </pre>
+     *          The oci8 driver also returns a [when_clause] index.
+     * @access public
+     */
+    function getTriggerDefinition($trigger)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+            'method not implemented', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ tableInfo()
+
+    /**
+     * Returns information about a table or a result set
+     *
+     * The format of the resulting array depends on which <var>$mode</var>
+     * you select.  The sample output below is based on this query:
+     * <pre>
+     *    SELECT tblFoo.fldID, tblFoo.fldPhone, tblBar.fldId
+     *    FROM tblFoo
+     *    JOIN tblBar ON tblFoo.fldId = tblBar.fldId
+     * </pre>
+     *
+     * <ul>
+     * <li>
+     *
+     * <kbd>null</kbd> (default)
+     *   <pre>
+     *   [0] => Array (
+     *       [table] => tblFoo
+     *       [name] => fldId
+     *       [type] => int
+     *       [len] => 11
+     *       [flags] => primary_key not_null
+     *   )
+     *   [1] => Array (
+     *       [table] => tblFoo
+     *       [name] => fldPhone
+     *       [type] => string
+     *       [len] => 20
+     *       [flags] =>
+     *   )
+     *   [2] => Array (
+     *       [table] => tblBar
+     *       [name] => fldId
+     *       [type] => int
+     *       [len] => 11
+     *       [flags] => primary_key not_null
+     *   )
+     *   </pre>
+     *
+     * </li><li>
+     *
+     * <kbd>MDB2_TABLEINFO_ORDER</kbd>
+     *
+     *   <p>In addition to the information found in the default output,
+     *   a notation of the number of columns is provided by the
+     *   <samp>num_fields</samp> element while the <samp>order</samp>
+     *   element provides an array with the column names as the keys and
+     *   their location index number (corresponding to the keys in the
+     *   the default output) as the values.</p>
+     *
+     *   <p>If a result set has identical field names, the last one is
+     *   used.</p>
+     *
+     *   <pre>
+     *   [num_fields] => 3
+     *   [order] => Array (
+     *       [fldId] => 2
+     *       [fldTrans] => 1
+     *   )
+     *   </pre>
+     *
+     * </li><li>
+     *
+     * <kbd>MDB2_TABLEINFO_ORDERTABLE</kbd>
+     *
+     *   <p>Similar to <kbd>MDB2_TABLEINFO_ORDER</kbd> but adds more
+     *   dimensions to the array in which the table names are keys and
+     *   the field names are sub-keys.  This is helpful for queries that
+     *   join tables which have identical field names.</p>
+     *
+     *   <pre>
+     *   [num_fields] => 3
+     *   [ordertable] => Array (
+     *       [tblFoo] => Array (
+     *           [fldId] => 0
+     *           [fldPhone] => 1
+     *       )
+     *       [tblBar] => Array (
+     *           [fldId] => 2
+     *       )
+     *   )
+     *   </pre>
+     *
+     * </li>
+     * </ul>
+     *
+     * The <samp>flags</samp> element contains a space separated list
+     * of extra information about the field.  This data is inconsistent
+     * between DBMS's due to the way each DBMS works.
+     *   + <samp>primary_key</samp>
+     *   + <samp>unique_key</samp>
+     *   + <samp>multiple_key</samp>
+     *   + <samp>not_null</samp>
+     *
+     * Most DBMS's only provide the <samp>table</samp> and <samp>flags</samp>
+     * elements if <var>$result</var> is a table name.  The following DBMS's
+     * provide full information from queries:
+     *   + fbsql
+     *   + mysql
+     *
+     * If the 'portability' option has <samp>MDB2_PORTABILITY_FIX_CASE</samp>
+     * turned on, the names of tables and fields will be lower or upper cased.
+     *
+     * @param object|string  $result  MDB2_result object from a query or a
+     *                                string containing the name of a table.
+     *                                While this also accepts a query result
+     *                                resource identifier, this behavior is
+     *                                deprecated.
+     * @param int  $mode   either unused or one of the tableInfo modes:
+     *                     <kbd>MDB2_TABLEINFO_ORDERTABLE</kbd>,
+     *                     <kbd>MDB2_TABLEINFO_ORDER</kbd> or
+     *                     <kbd>MDB2_TABLEINFO_FULL</kbd> (which does both).
+     *                     These are bitwise, so the first two can be
+     *                     combined using <kbd>|</kbd>.
+     *
+     * @return array  an associative array with the information requested.
+     *                 A MDB2_Error object on failure.
+     *
+     * @see MDB2_Driver_Common::setOption()
+     */
+    function tableInfo($result, $mode = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if (!is_string($result)) {
+            return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'method not implemented', __FUNCTION__);
+        }
+
+        $db->loadModule('Manager', null, true);
+        $fields = $db->manager->listTableFields($result);
+        if (PEAR::isError($fields)) {
+            return $fields;
+        }
+
+        $flags = array();
+
+        $idxname_format = $db->getOption('idxname_format');
+        $db->setOption('idxname_format', '%s');
+
+        $indexes = $db->manager->listTableIndexes($result);
+        if (PEAR::isError($indexes)) {
+            $db->setOption('idxname_format', $idxname_format);
+            return $indexes;
+        }
+
+        foreach ($indexes as $index) {
+            $definition = $this->getTableIndexDefinition($result, $index);
+            if (PEAR::isError($definition)) {
+                $db->setOption('idxname_format', $idxname_format);
+                return $definition;
+            }
+            if (count($definition['fields']) > 1) {
+                foreach ($definition['fields'] as $field => $sort) {
+                    $flags[$field] = 'multiple_key';
+                }
+            }
+        }
+
+        $constraints = $db->manager->listTableConstraints($result);
+        if (PEAR::isError($constraints)) {
+            return $constraints;
+        }
+
+        foreach ($constraints as $constraint) {
+            $definition = $this->getTableConstraintDefinition($result, $constraint);
+            if (PEAR::isError($definition)) {
+                $db->setOption('idxname_format', $idxname_format);
+                return $definition;
+            }
+            $flag = !empty($definition['primary'])
+                ? 'primary_key' : (!empty($definition['unique'])
+                    ? 'unique_key' : false);
+            if ($flag) {
+                foreach ($definition['fields'] as $field => $sort) {
+                    if (empty($flags[$field]) || $flags[$field] != 'primary_key') {
+                        $flags[$field] = $flag;
+                    }
+                }
+            }
+        }
+
+        $res = array();
+
+        if ($mode) {
+            $res['num_fields'] = count($fields);
+        }
+
+        foreach ($fields as $i => $field) {
+            $definition = $this->getTableFieldDefinition($result, $field);
+            if (PEAR::isError($definition)) {
+                $db->setOption('idxname_format', $idxname_format);
+                return $definition;
+            }
+            $res[$i] = $definition[0];
+            $res[$i]['name'] = $field;
+            $res[$i]['table'] = $result;
+            $res[$i]['type'] = preg_replace('/^([a-z]+).*$/i', '\\1', trim($definition[0]['nativetype']));
+            // 'primary_key', 'unique_key', 'multiple_key'
+            $res[$i]['flags'] = empty($flags[$field]) ? '' : $flags[$field];
+            // not_null', 'unsigned', 'auto_increment', 'default_[rawencodedvalue]'
+            if (!empty($res[$i]['notnull'])) {
+                $res[$i]['flags'].= ' not_null';
+            }
+            if (!empty($res[$i]['unsigned'])) {
+                $res[$i]['flags'].= ' unsigned';
+            }
+            if (!empty($res[$i]['auto_increment'])) {
+                $res[$i]['flags'].= ' autoincrement';
+            }
+            if (!empty($res[$i]['default'])) {
+                $res[$i]['flags'].= ' default_'.rawurlencode($res[$i]['default']);
+            }
+
+            if ($mode & MDB2_TABLEINFO_ORDER) {
+                $res['order'][$res[$i]['name']] = $i;
+            }
+            if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
+                $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
+            }
+        }
+
+        $db->setOption('idxname_format', $idxname_format);
+        return $res;
+    }
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Reverse/mysql.php b/inc/MDB2/Driver/Reverse/mysql.php
new file mode 100755
index 00000000000..ab1f601ef05
--- /dev/null
+++ b/inc/MDB2/Driver/Reverse/mysql.php
@@ -0,0 +1,536 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: mysql.php,v 1.80 2008/03/26 21:15:37 quipo Exp $
+//
+
+require_once 'MDB2/Driver/Reverse/Common.php';
+
+/**
+ * MDB2 MySQL driver for the schema reverse engineering module
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ * @author  Lorenzo Alberton <l.alberton@quipo.it>
+ */
+class MDB2_Driver_Reverse_mysql extends MDB2_Driver_Reverse_Common
+{
+    // {{{ getTableFieldDefinition()
+
+    /**
+     * Get the structure of a field into an array
+     *
+     * @param string $table_name name of table that should be used in method
+     * @param string $field_name name of field that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTableFieldDefinition($table_name, $field_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $result = $db->loadModule('Datatype', null, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+
+        list($schema, $table) = $this->splitTableSchema($table_name);
+
+        $table = $db->quoteIdentifier($table, true);
+        $query = "SHOW FULL COLUMNS FROM $table LIKE ".$db->quote($field_name);
+        $columns = $db->queryAll($query, null, MDB2_FETCHMODE_ASSOC);
+        if (PEAR::isError($columns)) {
+            return $columns;
+        }
+        foreach ($columns as $column) {
+            $column = array_change_key_case($column, CASE_LOWER);
+            $column['name'] = $column['field'];
+            unset($column['field']);
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                if ($db->options['field_case'] == CASE_LOWER) {
+                    $column['name'] = strtolower($column['name']);
+                } else {
+                    $column['name'] = strtoupper($column['name']);
+                }
+            } else {
+                $column = array_change_key_case($column, $db->options['field_case']);
+            }
+            if ($field_name == $column['name']) {
+                $mapped_datatype = $db->datatype->mapNativeDatatype($column);
+                if (PEAR::isError($mapped_datatype)) {
+                    return $mapped_datatype;
+                }
+                list($types, $length, $unsigned, $fixed) = $mapped_datatype;
+                $notnull = false;
+                if (empty($column['null']) || $column['null'] !== 'YES') {
+                    $notnull = true;
+                }
+                $default = false;
+                if (array_key_exists('default', $column)) {
+                    $default = $column['default'];
+                    if (is_null($default) && $notnull) {
+                        $default = '';
+                    }
+                }
+                $autoincrement = false;
+                if (!empty($column['extra']) && $column['extra'] == 'auto_increment') {
+                    $autoincrement = true;
+                }
+                $collate = null;
+                if (!empty($column['collation'])) {
+                    $collate = $column['collation'];
+                    $charset = preg_replace('/(.+?)(_.+)?/', '$1', $collate);
+                }
+
+                $definition[0] = array(
+                    'notnull' => $notnull,
+                    'nativetype' => preg_replace('/^([a-z]+)[^a-z].*/i', '\\1', $column['type'])
+                );
+                if (!is_null($length)) {
+                    $definition[0]['length'] = $length;
+                }
+                if (!is_null($unsigned)) {
+                    $definition[0]['unsigned'] = $unsigned;
+                }
+                if (!is_null($fixed)) {
+                    $definition[0]['fixed'] = $fixed;
+                }
+                if ($default !== false) {
+                    $definition[0]['default'] = $default;
+                }
+                if ($autoincrement !== false) {
+                    $definition[0]['autoincrement'] = $autoincrement;
+                }
+                if (!is_null($collate)) {
+                    $definition[0]['collate'] = $collate;
+                    $definition[0]['charset'] = $charset;
+                }
+                foreach ($types as $key => $type) {
+                    $definition[$key] = $definition[0];
+                    if ($type == 'clob' || $type == 'blob') {
+                        unset($definition[$key]['default']);
+                    } elseif ($type == 'timestamp' && $notnull && empty($definition[$key]['default'])) {
+                        $definition[$key]['default'] = '0000-00-00 00:00:00';
+                    }
+                    $definition[$key]['type'] = $type;
+                    $definition[$key]['mdb2type'] = $type;
+                }
+                return $definition;
+            }
+        }
+
+        return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+            'it was not specified an existing table column', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ getTableIndexDefinition()
+
+    /**
+     * Get the structure of an index into an array
+     *
+     * @param string $table_name name of table that should be used in method
+     * @param string $index_name name of index that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTableIndexDefinition($table_name, $index_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        list($schema, $table) = $this->splitTableSchema($table_name);
+
+        $table = $db->quoteIdentifier($table, true);
+        $query = "SHOW INDEX FROM $table /*!50002 WHERE Key_name = %s */";
+        $index_name_mdb2 = $db->getIndexName($index_name);
+        $result = $db->queryRow(sprintf($query, $db->quote($index_name_mdb2)));
+        if (!PEAR::isError($result) && !is_null($result)) {
+            // apply 'idxname_format' only if the query succeeded, otherwise
+            // fallback to the given $index_name, without transformation
+            $index_name = $index_name_mdb2;
+        }
+        $result = $db->query(sprintf($query, $db->quote($index_name)));
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $colpos = 1;
+        $definition = array();
+        while (is_array($row = $result->fetchRow(MDB2_FETCHMODE_ASSOC))) {
+            $row = array_change_key_case($row, CASE_LOWER);
+            $key_name = $row['key_name'];
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                if ($db->options['field_case'] == CASE_LOWER) {
+                    $key_name = strtolower($key_name);
+                } else {
+                    $key_name = strtoupper($key_name);
+                }
+            }
+            if ($index_name == $key_name) {
+                if (!$row['non_unique']) {
+                    return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                        $index_name . ' is not an existing table index', __FUNCTION__);
+                }
+                $column_name = $row['column_name'];
+                if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                    if ($db->options['field_case'] == CASE_LOWER) {
+                        $column_name = strtolower($column_name);
+                    } else {
+                        $column_name = strtoupper($column_name);
+                    }
+                }
+                $definition['fields'][$column_name] = array(
+                    'position' => $colpos++
+                );
+                if (!empty($row['collation'])) {
+                    $definition['fields'][$column_name]['sorting'] = ($row['collation'] == 'A'
+                        ? 'ascending' : 'descending');
+                }
+            }
+        }
+        $result->free();
+        if (empty($definition['fields'])) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                $index_name . ' is not an existing table index', __FUNCTION__);
+        }
+        return $definition;
+    }
+
+    // }}}
+    // {{{ getTableConstraintDefinition()
+
+    /**
+     * Get the structure of a constraint into an array
+     *
+     * @param string $table_name      name of table that should be used in method
+     * @param string $constraint_name name of constraint that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTableConstraintDefinition($table_name, $constraint_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        list($schema, $table) = $this->splitTableSchema($table_name);
+        $constraint_name_original = $constraint_name;
+
+        $table = $db->quoteIdentifier($table, true);
+        $query = "SHOW INDEX FROM $table /*!50002 WHERE Key_name = %s */";
+        if (strtolower($constraint_name) != 'primary') {
+            $constraint_name_mdb2 = $db->getIndexName($constraint_name);
+            $result = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2)));
+            if (!PEAR::isError($result) && !is_null($result)) {
+                // apply 'idxname_format' only if the query succeeded, otherwise
+                // fallback to the given $index_name, without transformation
+                $constraint_name = $constraint_name_mdb2;
+            }
+        }
+        $result = $db->query(sprintf($query, $db->quote($constraint_name)));
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $colpos = 1;
+        //default values, eventually overridden
+        $definition = array(
+            'primary' => false,
+            'unique'  => false,
+            'foreign' => false,
+            'check'   => false,
+            'fields'  => array(),
+            'references' => array(
+                'table'  => '',
+                'fields' => array(),
+            ),
+            'onupdate'  => '',
+            'ondelete'  => '',
+            'match'     => '',
+            'deferrable'        => false,
+            'initiallydeferred' => false,
+        );
+        while (is_array($row = $result->fetchRow(MDB2_FETCHMODE_ASSOC))) {
+            $row = array_change_key_case($row, CASE_LOWER);
+            $key_name = $row['key_name'];
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                if ($db->options['field_case'] == CASE_LOWER) {
+                    $key_name = strtolower($key_name);
+                } else {
+                    $key_name = strtoupper($key_name);
+                }
+            }
+            if ($constraint_name == $key_name) {
+                if ($row['non_unique']) {
+                    //FOREIGN KEY?
+                    return $this->_getTableFKConstraintDefinition($table, $constraint_name_original, $definition);
+                }
+                if ($row['key_name'] == 'PRIMARY') {
+                    $definition['primary'] = true;
+                } elseif (!$row['non_unique']) {
+                    $definition['unique'] = true;
+                }
+                $column_name = $row['column_name'];
+                if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                    if ($db->options['field_case'] == CASE_LOWER) {
+                        $column_name = strtolower($column_name);
+                    } else {
+                        $column_name = strtoupper($column_name);
+                    }
+                }
+                $definition['fields'][$column_name] = array(
+                    'position' => $colpos++
+                );
+                if (!empty($row['collation'])) {
+                    $definition['fields'][$column_name]['sorting'] = ($row['collation'] == 'A'
+                        ? 'ascending' : 'descending');
+                }
+            }
+        }
+        $result->free();
+        if (empty($definition['fields'])) {
+            return $this->_getTableFKConstraintDefinition($table, $constraint_name_original, $definition);
+        }
+        return $definition;
+    }
+
+    // }}}
+    // {{{ _getTableFKConstraintDefinition()
+    
+    /**
+     * Get the FK definition from the CREATE TABLE statement
+     *
+     * @param string $table           table name
+     * @param string $constraint_name constraint name
+     * @param array  $definition      default values for constraint definition
+     *
+     * @return array|PEAR_Error
+     * @access private
+     */
+    function _getTableFKConstraintDefinition($table, $constraint_name, $definition)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        $query = 'SHOW CREATE TABLE '. $db->escape($table);
+        $constraint = $db->queryOne($query, 'text', 1);
+        if (!PEAR::isError($constraint) && !empty($constraint)) {
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                if ($db->options['field_case'] == CASE_LOWER) {
+                    $constraint = strtolower($constraint);
+                } else {
+                    $constraint = strtoupper($constraint);
+                }
+            }
+            $constraint_name_original = $constraint_name;
+            $constraint_name = $db->getIndexName($constraint_name);
+            $pattern = '/\bCONSTRAINT\s+'.$constraint_name.'\s+FOREIGN KEY\s+\(([^\)]+)\) \bREFERENCES\b ([^ ]+) \(([^\)]+)\)/i';
+            if (!preg_match($pattern, str_replace('`', '', $constraint), $matches)) {
+                //fallback to original constraint name
+                $pattern = '/\bCONSTRAINT\s+'.$constraint_name_original.'\s+FOREIGN KEY\s+\(([^\)]+)\) \bREFERENCES\b ([^ ]+) \(([^\)]+)\)/i';
+            }
+            if (preg_match($pattern, str_replace('`', '', $constraint), $matches)) {
+                $definition['foreign'] = true;
+                $column_names = explode(',', $matches[1]);
+                $referenced_cols = explode(',', $matches[3]);
+                $definition['references'] = array(
+                    'table'  => $matches[2],
+                    'fields' => array(),
+                );
+                $colpos = 1;
+                foreach ($column_names as $column_name) {
+                    $definition['fields'][trim($column_name)] = array(
+                        'position' => $colpos++
+                    );
+                }
+                $colpos = 1;
+                foreach ($referenced_cols as $column_name) {
+                    $definition['references']['fields'][trim($column_name)] = array(
+                        'position' => $colpos++
+                    );
+                }
+                $definition['onupdate'] = 'NO ACTION';
+                $definition['ondelete'] = 'NO ACTION';
+                $definition['match']    = 'SIMPLE';
+                return $definition;
+            }
+        }
+        return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                $constraint_name . ' is not an existing table constraint', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ getTriggerDefinition()
+
+    /**
+     * Get the structure of a trigger into an array
+     *
+     * EXPERIMENTAL
+     *
+     * WARNING: this function is experimental and may change the returned value
+     * at any time until labelled as non-experimental
+     *
+     * @param string    $trigger    name of trigger that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTriggerDefinition($trigger)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = 'SELECT trigger_name,
+                         event_object_table AS table_name,
+                         action_statement AS trigger_body,
+                         action_timing AS trigger_type,
+                         event_manipulation AS trigger_event
+                    FROM information_schema.triggers
+                   WHERE trigger_name = '. $db->quote($trigger, 'text');
+        $types = array(
+            'trigger_name'    => 'text',
+            'table_name'      => 'text',
+            'trigger_body'    => 'text',
+            'trigger_type'    => 'text',
+            'trigger_event'   => 'text',
+        );
+        $def = $db->queryRow($query, $types, MDB2_FETCHMODE_ASSOC);
+        if (PEAR::isError($def)) {
+            return $def;
+        }
+        $def['trigger_comment'] = '';
+        $def['trigger_enabled'] = true;
+        return $def;
+    }
+
+    // }}}
+    // {{{ tableInfo()
+
+    /**
+     * Returns information about a table or a result set
+     *
+     * @param object|string  $result  MDB2_result object from a query or a
+     *                                 string containing the name of a table.
+     *                                 While this also accepts a query result
+     *                                 resource identifier, this behavior is
+     *                                 deprecated.
+     * @param int            $mode    a valid tableInfo mode
+     *
+     * @return array  an associative array with the information requested.
+     *                 A MDB2_Error object on failure.
+     *
+     * @see MDB2_Driver_Common::setOption()
+     */
+    function tableInfo($result, $mode = null)
+    {
+        if (is_string($result)) {
+           return parent::tableInfo($result, $mode);
+        }
+
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $resource = MDB2::isResultCommon($result) ? $result->getResource() : $result;
+        if (!is_resource($resource)) {
+            return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'Could not generate result resource', __FUNCTION__);
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            if ($db->options['field_case'] == CASE_LOWER) {
+                $case_func = 'strtolower';
+            } else {
+                $case_func = 'strtoupper';
+            }
+        } else {
+            $case_func = 'strval';
+        }
+
+        $count = @mysql_num_fields($resource);
+        $res   = array();
+        if ($mode) {
+            $res['num_fields'] = $count;
+        }
+
+        $db->loadModule('Datatype', null, true);
+        for ($i = 0; $i < $count; $i++) {
+            $res[$i] = array(
+                'table' => $case_func(@mysql_field_table($resource, $i)),
+                'name'  => $case_func(@mysql_field_name($resource, $i)),
+                'type'  => @mysql_field_type($resource, $i),
+                'length'   => @mysql_field_len($resource, $i),
+                'flags' => @mysql_field_flags($resource, $i),
+            );
+            if ($res[$i]['type'] == 'string') {
+                $res[$i]['type'] = 'char';
+            } elseif ($res[$i]['type'] == 'unknown') {
+                $res[$i]['type'] = 'decimal';
+            }
+            $mdb2type_info = $db->datatype->mapNativeDatatype($res[$i]);
+            if (PEAR::isError($mdb2type_info)) {
+               return $mdb2type_info;
+            }
+            $res[$i]['mdb2type'] = $mdb2type_info[0][0];
+            if ($mode & MDB2_TABLEINFO_ORDER) {
+                $res['order'][$res[$i]['name']] = $i;
+            }
+            if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
+                $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
+            }
+        }
+
+        return $res;
+    }
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Reverse/pgsql.php b/inc/MDB2/Driver/Reverse/pgsql.php
new file mode 100755
index 00000000000..1fff29dc4b7
--- /dev/null
+++ b/inc/MDB2/Driver/Reverse/pgsql.php
@@ -0,0 +1,573 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Authors: Paul Cooper <pgc@ucecom.com>                                |
+// |          Lorenzo Alberton <l.alberton@quipo.it>                      |
+// +----------------------------------------------------------------------+
+//
+// $Id: pgsql.php,v 1.75 2008/08/22 16:36:20 quipo Exp $
+
+require_once 'MDB2/Driver/Reverse/Common.php';
+
+/**
+ * MDB2 PostGreSQL driver for the schema reverse engineering module
+ *
+ * @package  MDB2
+ * @category Database
+ * @author   Paul Cooper <pgc@ucecom.com>
+ * @author   Lorenzo Alberton <l.alberton@quipo.it>
+ */
+class MDB2_Driver_Reverse_pgsql extends MDB2_Driver_Reverse_Common
+{
+    // {{{ getTableFieldDefinition()
+
+    /**
+     * Get the structure of a field into an array
+     *
+     * @param string $table_name name of table that should be used in method
+     * @param string $field_name name of field that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTableFieldDefinition($table_name, $field_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $result = $db->loadModule('Datatype', null, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+
+        list($schema, $table) = $this->splitTableSchema($table_name);
+
+        $query = "SELECT a.attname AS name,
+                         t.typname AS type,
+                         CASE a.attlen
+                           WHEN -1 THEN
+	                         CASE t.typname
+	                           WHEN 'numeric' THEN (a.atttypmod / 65536)
+	                           WHEN 'decimal' THEN (a.atttypmod / 65536)
+	                           WHEN 'money'   THEN (a.atttypmod / 65536)
+	                           ELSE CASE a.atttypmod
+                                 WHEN -1 THEN NULL
+	                             ELSE a.atttypmod - 4
+	                           END
+                             END
+	                       ELSE a.attlen
+                         END AS length,
+	                     CASE t.typname
+	                       WHEN 'numeric' THEN (a.atttypmod % 65536) - 4
+	                       WHEN 'decimal' THEN (a.atttypmod % 65536) - 4
+	                       WHEN 'money'   THEN (a.atttypmod % 65536) - 4
+	                       ELSE 0
+                         END AS scale,
+                         a.attnotnull,
+                         a.atttypmod,
+                         a.atthasdef,
+                         (SELECT substring(pg_get_expr(d.adbin, d.adrelid) for 128)
+                            FROM pg_attrdef d
+                           WHERE d.adrelid = a.attrelid
+                             AND d.adnum = a.attnum
+                             AND a.atthasdef
+                         ) as default
+                    FROM pg_attribute a,
+                         pg_class c,
+                         pg_type t
+                   WHERE c.relname = ".$db->quote($table, 'text')."
+                     AND a.atttypid = t.oid
+                     AND c.oid = a.attrelid
+                     AND NOT a.attisdropped
+                     AND a.attnum > 0
+                     AND a.attname = ".$db->quote($field_name, 'text')."
+                ORDER BY a.attnum";
+        $column = $db->queryRow($query, null, MDB2_FETCHMODE_ASSOC);
+        if (PEAR::isError($column)) {
+            return $column;
+        }
+
+        if (empty($column)) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'it was not specified an existing table column', __FUNCTION__);
+        }
+
+        $column = array_change_key_case($column, CASE_LOWER);
+        $mapped_datatype = $db->datatype->mapNativeDatatype($column);
+        if (PEAR::isError($mapped_datatype)) {
+            return $mapped_datatype;
+        }
+        list($types, $length, $unsigned, $fixed) = $mapped_datatype;
+        $notnull = false;
+        if (!empty($column['attnotnull']) && $column['attnotnull'] == 't') {
+            $notnull = true;
+        }
+        $default = null;
+        if ($column['atthasdef'] === 't'
+            && !preg_match("/nextval\('([^']+)'/", $column['default'])
+        ) {
+            $pattern = '/^\'(.*)\'::[\w ]+$/i';
+            $default = $column['default'];#substr($column['adsrc'], 1, -1);
+            if (is_null($default) && $notnull) {
+                $default = '';
+            } elseif (!empty($default) && preg_match($pattern, $default)) {
+                //remove data type cast
+                $default = preg_replace ($pattern, '\\1', $default);
+            }
+        }
+        $autoincrement = false;
+        if (preg_match("/nextval\('([^']+)'/", $column['default'], $nextvals)) {
+            $autoincrement = true;
+        }
+        $definition[0] = array('notnull' => $notnull, 'nativetype' => $column['type']);
+        if (!is_null($length)) {
+            $definition[0]['length'] = $length;
+        }
+        if (!is_null($unsigned)) {
+            $definition[0]['unsigned'] = $unsigned;
+        }
+        if (!is_null($fixed)) {
+            $definition[0]['fixed'] = $fixed;
+        }
+        if ($default !== false) {
+            $definition[0]['default'] = $default;
+        }
+        if ($autoincrement !== false) {
+            $definition[0]['autoincrement'] = $autoincrement;
+        }
+        foreach ($types as $key => $type) {
+            $definition[$key] = $definition[0];
+            if ($type == 'clob' || $type == 'blob') {
+                unset($definition[$key]['default']);
+            }
+            $definition[$key]['type'] = $type;
+            $definition[$key]['mdb2type'] = $type;
+        }
+        return $definition;
+    }
+
+    // }}}
+    // {{{ getTableIndexDefinition()
+
+    /**
+     * Get the structure of an index into an array
+     *
+     * @param string $table_name name of table that should be used in method
+     * @param string $index_name name of index that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTableIndexDefinition($table_name, $index_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        
+        list($schema, $table) = $this->splitTableSchema($table_name);
+
+        $query = 'SELECT relname, indkey FROM pg_index, pg_class';
+        $query.= ' WHERE pg_class.oid = pg_index.indexrelid';
+        $query.= " AND indisunique != 't' AND indisprimary != 't'";
+        $query.= ' AND pg_class.relname = %s';
+        $index_name_mdb2 = $db->getIndexName($index_name);
+        $row = $db->queryRow(sprintf($query, $db->quote($index_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
+        if (PEAR::isError($row) || empty($row)) {
+            // fallback to the given $index_name, without transformation
+            $row = $db->queryRow(sprintf($query, $db->quote($index_name, 'text')), null, MDB2_FETCHMODE_ASSOC);
+        }
+        if (PEAR::isError($row)) {
+            return $row;
+        }
+
+        if (empty($row)) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'it was not specified an existing table index', __FUNCTION__);
+        }
+
+        $row = array_change_key_case($row, CASE_LOWER);
+
+        $db->loadModule('Manager', null, true);
+        $columns = $db->manager->listTableFields($table_name);
+
+        $definition = array();
+
+        $index_column_numbers = explode(' ', $row['indkey']);
+
+        $colpos = 1;
+        foreach ($index_column_numbers as $number) {
+            $definition['fields'][$columns[($number - 1)]] = array(
+                'position' => $colpos++,
+                'sorting' => 'ascending',
+            );
+        }
+        return $definition;
+    }
+
+    // }}}
+    // {{{ getTableConstraintDefinition()
+
+    /**
+     * Get the structure of a constraint into an array
+     *
+     * @param string $table_name      name of table that should be used in method
+     * @param string $constraint_name name of constraint that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTableConstraintDefinition($table_name, $constraint_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        
+        list($schema, $table) = $this->splitTableSchema($table_name);
+
+        $query = "SELECT c.oid,
+                         c.conname AS constraint_name,
+                         CASE WHEN c.contype = 'c' THEN 1 ELSE 0 END AS \"check\",
+                         CASE WHEN c.contype = 'f' THEN 1 ELSE 0 END AS \"foreign\",
+                         CASE WHEN c.contype = 'p' THEN 1 ELSE 0 END AS \"primary\",
+                         CASE WHEN c.contype = 'u' THEN 1 ELSE 0 END AS \"unique\",
+                         CASE WHEN c.condeferrable = 'f' THEN 0 ELSE 1 END AS deferrable,
+                         CASE WHEN c.condeferred = 'f' THEN 0 ELSE 1 END AS initiallydeferred,
+                         --array_to_string(c.conkey, ' ') AS constraint_key,
+                         t.relname AS table_name,
+                         t2.relname AS references_table,
+                         CASE confupdtype
+                           WHEN 'a' THEN 'NO ACTION'
+                           WHEN 'r' THEN 'RESTRICT'
+                           WHEN 'c' THEN 'CASCADE'
+                           WHEN 'n' THEN 'SET NULL'
+                           WHEN 'd' THEN 'SET DEFAULT'
+                         END AS onupdate,
+                         CASE confdeltype
+                           WHEN 'a' THEN 'NO ACTION'
+                           WHEN 'r' THEN 'RESTRICT'
+                           WHEN 'c' THEN 'CASCADE'
+                           WHEN 'n' THEN 'SET NULL'
+                           WHEN 'd' THEN 'SET DEFAULT'
+                         END AS ondelete,
+                         CASE confmatchtype
+                           WHEN 'u' THEN 'UNSPECIFIED'
+                           WHEN 'f' THEN 'FULL'
+                           WHEN 'p' THEN 'PARTIAL'
+                         END AS match,
+                         --array_to_string(c.confkey, ' ') AS fk_constraint_key,
+                         consrc
+                    FROM pg_constraint c
+               LEFT JOIN pg_class t  ON c.conrelid  = t.oid
+               LEFT JOIN pg_class t2 ON c.confrelid = t2.oid
+                   WHERE c.conname = %s
+                     AND t.relname = " . $db->quote($table, 'text');
+        $constraint_name_mdb2 = $db->getIndexName($constraint_name);
+        $row = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
+        if (PEAR::isError($row) || empty($row)) {
+            // fallback to the given $index_name, without transformation
+            $constraint_name_mdb2 = $constraint_name;
+            $row = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
+        }
+        if (PEAR::isError($row)) {
+            return $row;
+        }
+        $uniqueIndex = false;
+        if (empty($row)) {
+            // We might be looking for a UNIQUE index that was not created
+            // as a constraint but should be treated as such.
+            $query = 'SELECT relname AS constraint_name,
+                             indkey,
+                             0 AS "check",
+                             0 AS "foreign",
+                             0 AS "primary",
+                             1 AS "unique",
+                             0 AS deferrable,
+                             0 AS initiallydeferred,
+                             NULL AS references_table,
+                             NULL AS onupdate,
+                             NULL AS ondelete,
+                             NULL AS match
+                        FROM pg_index, pg_class
+                       WHERE pg_class.oid = pg_index.indexrelid
+                         AND indisunique = \'t\'
+                         AND pg_class.relname = %s';
+            $constraint_name_mdb2 = $db->getIndexName($constraint_name);
+            $row = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
+            if (PEAR::isError($row) || empty($row)) {
+                // fallback to the given $index_name, without transformation
+                $constraint_name_mdb2 = $constraint_name;
+                $row = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
+            }
+            if (PEAR::isError($row)) {
+                return $row;
+            }
+            if (empty($row)) {
+                return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                    $constraint_name . ' is not an existing table constraint', __FUNCTION__);
+            }
+            $uniqueIndex = true;
+        }
+
+        $row = array_change_key_case($row, CASE_LOWER);
+
+        $definition = array(
+            'primary' => (boolean)$row['primary'],
+            'unique'  => (boolean)$row['unique'],
+            'foreign' => (boolean)$row['foreign'],
+            'check'   => (boolean)$row['check'],
+            'fields'  => array(),
+            'references' => array(
+                'table'  => $row['references_table'],
+                'fields' => array(),
+            ),
+            'deferrable' => (boolean)$row['deferrable'],
+            'initiallydeferred' => (boolean)$row['initiallydeferred'],
+            'onupdate' => $row['onupdate'],
+            'ondelete' => $row['ondelete'],
+            'match'    => $row['match'],
+        );
+
+        if ($uniqueIndex) {
+            $db->loadModule('Manager', null, true);
+            $columns = $db->manager->listTableFields($table_name);
+            $index_column_numbers = explode(' ', $row['indkey']);
+            $colpos = 1;
+            foreach ($index_column_numbers as $number) {
+                $definition['fields'][$columns[($number - 1)]] = array(
+                    'position' => $colpos++,
+                    'sorting'  => 'ascending',
+                );
+            }
+            return $definition;
+        }
+
+        $query = 'SELECT a.attname
+                    FROM pg_constraint c
+               LEFT JOIN pg_class t  ON c.conrelid  = t.oid
+               LEFT JOIN pg_attribute a ON a.attrelid = t.oid AND a.attnum = ANY(c.conkey)
+                   WHERE c.conname = %s
+                     AND t.relname = ' . $db->quote($table, 'text');
+        $fields = $db->queryCol(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null);
+        if (PEAR::isError($fields)) {
+            return $fields;
+        }
+        $colpos = 1;
+        foreach ($fields as $field) {
+            $definition['fields'][$field] = array(
+                'position' => $colpos++,
+                'sorting' => 'ascending',
+            );
+        }
+        
+        if ($definition['foreign']) {
+            $query = 'SELECT a.attname
+                        FROM pg_constraint c
+                   LEFT JOIN pg_class t  ON c.confrelid  = t.oid
+                   LEFT JOIN pg_attribute a ON a.attrelid = t.oid AND a.attnum = ANY(c.confkey)
+                       WHERE c.conname = %s
+                         AND t.relname = ' . $db->quote($definition['references']['table'], 'text');
+            $foreign_fields = $db->queryCol(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null);
+            if (PEAR::isError($foreign_fields)) {
+                return $foreign_fields;
+            }
+            $colpos = 1;
+            foreach ($foreign_fields as $foreign_field) {
+                $definition['references']['fields'][$foreign_field] = array(
+                    'position' => $colpos++,
+                );
+            }
+        }
+        
+        if ($definition['check']) {
+            $check_def = $db->queryOne("SELECT pg_get_constraintdef(" . $row['oid'] . ", 't')");
+            // ...
+        }
+        return $definition;
+    }
+
+    // }}}
+    // {{{ getTriggerDefinition()
+
+    /**
+     * Get the structure of a trigger into an array
+     *
+     * EXPERIMENTAL
+     *
+     * WARNING: this function is experimental and may change the returned value
+     * at any time until labelled as non-experimental
+     *
+     * @param string $trigger name of trigger that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     *
+     * @TODO: add support for plsql functions and functions with args
+     */
+    function getTriggerDefinition($trigger)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT trg.tgname AS trigger_name,
+                         tbl.relname AS table_name,
+                         CASE
+                            WHEN p.proname IS NOT NULL THEN 'EXECUTE PROCEDURE ' || p.proname || '();'
+                            ELSE ''
+                         END AS trigger_body,
+                         CASE trg.tgtype & cast(2 as int2)
+                            WHEN 0 THEN 'AFTER'
+                            ELSE 'BEFORE'
+                         END AS trigger_type,
+                         CASE trg.tgtype & cast(28 as int2)
+                            WHEN 16 THEN 'UPDATE'
+                            WHEN 8 THEN 'DELETE'
+                            WHEN 4 THEN 'INSERT'
+                            WHEN 20 THEN 'INSERT, UPDATE'
+                            WHEN 28 THEN 'INSERT, UPDATE, DELETE'
+                            WHEN 24 THEN 'UPDATE, DELETE'
+                            WHEN 12 THEN 'INSERT, DELETE'
+                         END AS trigger_event,
+                         CASE trg.tgenabled
+                            WHEN 'O' THEN 't'
+                            ELSE trg.tgenabled
+                         END AS trigger_enabled,
+                         obj_description(trg.oid, 'pg_trigger') AS trigger_comment
+                    FROM pg_trigger trg,
+                         pg_class tbl,
+                         pg_proc p
+                   WHERE trg.tgrelid = tbl.oid
+                     AND trg.tgfoid = p.oid
+                     AND trg.tgname = ". $db->quote($trigger, 'text');
+        $types = array(
+            'trigger_name'    => 'text',
+            'table_name'      => 'text',
+            'trigger_body'    => 'text',
+            'trigger_type'    => 'text',
+            'trigger_event'   => 'text',
+            'trigger_comment' => 'text',
+            'trigger_enabled' => 'boolean',
+        );
+        return $db->queryRow($query, $types, MDB2_FETCHMODE_ASSOC);
+    }
+    
+    // }}}
+    // {{{ tableInfo()
+
+    /**
+     * Returns information about a table or a result set
+     *
+     * NOTE: only supports 'table' and 'flags' if <var>$result</var>
+     * is a table name.
+     *
+     * @param object|string  $result  MDB2_result object from a query or a
+     *                                 string containing the name of a table.
+     *                                 While this also accepts a query result
+     *                                 resource identifier, this behavior is
+     *                                 deprecated.
+     * @param int            $mode    a valid tableInfo mode
+     *
+     * @return array  an associative array with the information requested.
+     *                 A MDB2_Error object on failure.
+     *
+     * @see MDB2_Driver_Common::tableInfo()
+     */
+    function tableInfo($result, $mode = null)
+    {
+        if (is_string($result)) {
+           return parent::tableInfo($result, $mode);
+        }
+
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $resource = MDB2::isResultCommon($result) ? $result->getResource() : $result;
+        if (!is_resource($resource)) {
+            return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'Could not generate result resource', __FUNCTION__);
+        }
+
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            if ($db->options['field_case'] == CASE_LOWER) {
+                $case_func = 'strtolower';
+            } else {
+                $case_func = 'strtoupper';
+            }
+        } else {
+            $case_func = 'strval';
+        }
+
+        $count = @pg_num_fields($resource);
+        $res   = array();
+
+        if ($mode) {
+            $res['num_fields'] = $count;
+        }
+
+        $db->loadModule('Datatype', null, true);
+        for ($i = 0; $i < $count; $i++) {
+            $res[$i] = array(
+                'table' => function_exists('pg_field_table') ? @pg_field_table($resource, $i) : '',
+                'name'  => $case_func(@pg_field_name($resource, $i)),
+                'type'  => @pg_field_type($resource, $i),
+                'length' => @pg_field_size($resource, $i),
+                'flags' => '',
+            );
+            $mdb2type_info = $db->datatype->mapNativeDatatype($res[$i]);
+            if (PEAR::isError($mdb2type_info)) {
+               return $mdb2type_info;
+            }
+            $res[$i]['mdb2type'] = $mdb2type_info[0][0];
+            if ($mode & MDB2_TABLEINFO_ORDER) {
+                $res['order'][$res[$i]['name']] = $i;
+            }
+            if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
+                $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
+            }
+        }
+
+        return $res;
+    }
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/Reverse/sqlite.php b/inc/MDB2/Driver/Reverse/sqlite.php
new file mode 100755
index 00000000000..432e5ecb918
--- /dev/null
+++ b/inc/MDB2/Driver/Reverse/sqlite.php
@@ -0,0 +1,609 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith, Lorenzo Alberton                       |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Authors: Lukas Smith <smith@pooteeweet.org>                          |
+// |          Lorenzo Alberton <l.alberton@quipo.it>                      |
+// +----------------------------------------------------------------------+
+//
+// $Id: sqlite.php,v 1.80 2008/05/03 10:30:14 quipo Exp $
+//
+
+require_once 'MDB2/Driver/Reverse/Common.php';
+
+/**
+ * MDB2 SQlite driver for the schema reverse engineering module
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Reverse_sqlite extends MDB2_Driver_Reverse_Common
+{
+    /**
+     * Remove SQL comments from the field definition
+     *
+     * @access private
+     */
+    function _removeComments($sql) {
+        $lines = split("\n", $sql);
+        foreach ($lines as $k => $line) {
+            $pieces = explode('--', $line);
+            if (count($pieces) > 1 && (substr_count($pieces[0], '\'') % 2) == 0) {
+                $lines[$k] = substr($line, 0, strpos($line, '--'));
+            }
+        }
+        return implode("\n", $lines);
+    }
+
+    /**
+     *
+     */
+    function _getTableColumns($sql)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        $start_pos  = strpos($sql, '(');
+        $end_pos    = strrpos($sql, ')');
+        $column_def = substr($sql, $start_pos+1, $end_pos-$start_pos-1);
+        // replace the decimal length-places-separator with a colon
+        $column_def = preg_replace('/(\d),(\d)/', '\1:\2', $column_def);
+        $column_def = $this->_removeComments($column_def);
+        $column_sql = split(',', $column_def);
+        $columns    = array();
+        $count      = count($column_sql);
+        if ($count == 0) {
+            return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'unexpected empty table column definition list', __FUNCTION__);
+        }
+        $regexp = '/^\s*([^\s]+) +(CHAR|VARCHAR|VARCHAR2|TEXT|BOOLEAN|SMALLINT|INT|INTEGER|DECIMAL|BIGINT|DOUBLE|FLOAT|DATETIME|DATE|TIME|LONGTEXT|LONGBLOB)( ?\(([1-9][0-9]*)(:([1-9][0-9]*))?\))?( NULL| NOT NULL)?( UNSIGNED)?( NULL| NOT NULL)?( PRIMARY KEY)?( DEFAULT (\'[^\']*\'|[^ ]+))?( NULL| NOT NULL)?( PRIMARY KEY)?(\s*\-\-.*)?$/i';
+        $regexp2 = '/^\s*([^ ]+) +(PRIMARY|UNIQUE|CHECK)$/i';
+        for ($i=0, $j=0; $i<$count; ++$i) {
+            if (!preg_match($regexp, trim($column_sql[$i]), $matches)) {
+                if (!preg_match($regexp2, trim($column_sql[$i]))) {
+                    continue;
+                }
+                return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'unexpected table column SQL definition: "'.$column_sql[$i].'"', __FUNCTION__);
+            }
+            $columns[$j]['name'] = trim($matches[1], implode('', $db->identifier_quoting));
+            $columns[$j]['type'] = strtolower($matches[2]);
+            if (isset($matches[4]) && strlen($matches[4])) {
+                $columns[$j]['length'] = $matches[4];
+            }
+            if (isset($matches[6]) && strlen($matches[6])) {
+                $columns[$j]['decimal'] = $matches[6];
+            }
+            if (isset($matches[8]) && strlen($matches[8])) {
+                $columns[$j]['unsigned'] = true;
+            }
+            if (isset($matches[9]) && strlen($matches[9])) {
+                $columns[$j]['autoincrement'] = true;
+            }
+            if (isset($matches[12]) && strlen($matches[12])) {
+                $default = $matches[12];
+                if (strlen($default) && $default[0]=="'") {
+                    $default = str_replace("''", "'", substr($default, 1, strlen($default)-2));
+                }
+                if ($default === 'NULL') {
+                    $default = null;
+                }
+                $columns[$j]['default'] = $default;
+            }
+            if (isset($matches[7]) && strlen($matches[7])) {
+                $columns[$j]['notnull'] = ($matches[7] === ' NOT NULL');
+            } else if (isset($matches[9]) && strlen($matches[9])) {
+                $columns[$j]['notnull'] = ($matches[9] === ' NOT NULL');
+            } else if (isset($matches[13]) && strlen($matches[13])) {
+                $columns[$j]['notnull'] = ($matches[13] === ' NOT NULL');
+            }
+            ++$j;
+        }
+        return $columns;
+    }
+
+    // {{{ getTableFieldDefinition()
+
+    /**
+     * Get the stucture of a field into an array
+     *
+     * @param string $table_name name of table that should be used in method
+     * @param string $field_name name of field that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure.
+     *          The returned array contains an array for each field definition,
+     *          with (some of) these indices:
+     *          [notnull] [nativetype] [length] [fixed] [default] [type] [mdb2type]
+     * @access public
+     */
+    function getTableFieldDefinition($table_name, $field_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        
+        list($schema, $table) = $this->splitTableSchema($table_name);
+
+        $result = $db->loadModule('Datatype', null, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $query.= 'LOWER(name)='.$db->quote(strtolower($table), 'text');
+        } else {
+            $query.= 'name='.$db->quote($table, 'text');
+        }
+        $sql = $db->queryOne($query);
+        if (PEAR::isError($sql)) {
+            return $sql;
+        }
+        $columns = $this->_getTableColumns($sql);
+        foreach ($columns as $column) {
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                if ($db->options['field_case'] == CASE_LOWER) {
+                    $column['name'] = strtolower($column['name']);
+                } else {
+                    $column['name'] = strtoupper($column['name']);
+                }
+            } else {
+                $column = array_change_key_case($column, $db->options['field_case']);
+            }
+            if ($field_name == $column['name']) {
+                $mapped_datatype = $db->datatype->mapNativeDatatype($column);
+                if (PEAR::isError($mapped_datatype)) {
+                    return $mapped_datatype;
+                }
+                list($types, $length, $unsigned, $fixed) = $mapped_datatype;
+                $notnull = false;
+                if (!empty($column['notnull'])) {
+                    $notnull = $column['notnull'];
+                }
+                $default = false;
+                if (array_key_exists('default', $column)) {
+                    $default = $column['default'];
+                    if (is_null($default) && $notnull) {
+                        $default = '';
+                    }
+                }
+                $autoincrement = false;
+                if (!empty($column['autoincrement'])) {
+                    $autoincrement = true;
+                }
+
+                $definition[0] = array(
+                    'notnull' => $notnull,
+                    'nativetype' => preg_replace('/^([a-z]+)[^a-z].*/i', '\\1', $column['type'])
+                );
+                if (!is_null($length)) {
+                    $definition[0]['length'] = $length;
+                }
+                if (!is_null($unsigned)) {
+                    $definition[0]['unsigned'] = $unsigned;
+                }
+                if (!is_null($fixed)) {
+                    $definition[0]['fixed'] = $fixed;
+                }
+                if ($default !== false) {
+                    $definition[0]['default'] = $default;
+                }
+                if ($autoincrement !== false) {
+                    $definition[0]['autoincrement'] = $autoincrement;
+                }
+                foreach ($types as $key => $type) {
+                    $definition[$key] = $definition[0];
+                    if ($type == 'clob' || $type == 'blob') {
+                        unset($definition[$key]['default']);
+                    }
+                    $definition[$key]['type'] = $type;
+                    $definition[$key]['mdb2type'] = $type;
+                }
+                return $definition;
+            }
+        }
+
+        return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+            'it was not specified an existing table column', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ getTableIndexDefinition()
+
+    /**
+     * Get the stucture of an index into an array
+     *
+     * @param string $table_name name of table that should be used in method
+     * @param string $index_name name of index that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTableIndexDefinition($table_name, $index_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        
+        list($schema, $table) = $this->splitTableSchema($table_name);
+
+        $query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $query.= 'LOWER(name)=%s AND LOWER(tbl_name)=' . $db->quote(strtolower($table), 'text');
+        } else {
+            $query.= 'name=%s AND tbl_name=' . $db->quote($table, 'text');
+        }
+        $query.= ' AND sql NOT NULL ORDER BY name';
+        $index_name_mdb2 = $db->getIndexName($index_name);
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $qry = sprintf($query, $db->quote(strtolower($index_name_mdb2), 'text'));
+        } else {
+            $qry = sprintf($query, $db->quote($index_name_mdb2, 'text'));
+        }
+        $sql = $db->queryOne($qry, 'text');
+        if (PEAR::isError($sql) || empty($sql)) {
+            // fallback to the given $index_name, without transformation
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                $qry = sprintf($query, $db->quote(strtolower($index_name), 'text'));
+            } else {
+                $qry = sprintf($query, $db->quote($index_name, 'text'));
+            }
+            $sql = $db->queryOne($qry, 'text');
+        }
+        if (PEAR::isError($sql)) {
+            return $sql;
+        }
+        if (!$sql) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'it was not specified an existing table index', __FUNCTION__);
+        }
+
+        $sql = strtolower($sql);
+        $start_pos = strpos($sql, '(');
+        $end_pos = strrpos($sql, ')');
+        $column_names = substr($sql, $start_pos+1, $end_pos-$start_pos-1);
+        $column_names = split(',', $column_names);
+
+        if (preg_match("/^create unique/", $sql)) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'it was not specified an existing table index', __FUNCTION__);
+        }
+
+        $definition = array();
+        $count = count($column_names);
+        for ($i=0; $i<$count; ++$i) {
+            $column_name = strtok($column_names[$i], ' ');
+            $collation = strtok(' ');
+            $definition['fields'][$column_name] = array(
+                'position' => $i+1
+            );
+            if (!empty($collation)) {
+                $definition['fields'][$column_name]['sorting'] =
+                    ($collation=='ASC' ? 'ascending' : 'descending');
+            }
+        }
+
+        if (empty($definition['fields'])) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'it was not specified an existing table index', __FUNCTION__);
+        }
+        return $definition;
+    }
+
+    // }}}
+    // {{{ getTableConstraintDefinition()
+
+    /**
+     * Get the stucture of a constraint into an array
+     *
+     * @param string $table_name      name of table that should be used in method
+     * @param string $constraint_name name of constraint that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTableConstraintDefinition($table_name, $constraint_name)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        
+        list($schema, $table) = $this->splitTableSchema($table_name);
+
+        $query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $query.= 'LOWER(name)=%s AND LOWER(tbl_name)=' . $db->quote(strtolower($table), 'text');
+        } else {
+            $query.= 'name=%s AND tbl_name=' . $db->quote($table, 'text');
+        }
+        $query.= ' AND sql NOT NULL ORDER BY name';
+        $constraint_name_mdb2 = $db->getIndexName($constraint_name);
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $qry = sprintf($query, $db->quote(strtolower($constraint_name_mdb2), 'text'));
+        } else {
+            $qry = sprintf($query, $db->quote($constraint_name_mdb2, 'text'));
+        }
+        $sql = $db->queryOne($qry, 'text');
+        if (PEAR::isError($sql) || empty($sql)) {
+            // fallback to the given $index_name, without transformation
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                $qry = sprintf($query, $db->quote(strtolower($constraint_name), 'text'));
+            } else {
+                $qry = sprintf($query, $db->quote($constraint_name, 'text'));
+            }
+            $sql = $db->queryOne($qry, 'text');
+        }
+        if (PEAR::isError($sql)) {
+            return $sql;
+        }
+        //default values, eventually overridden
+        $definition = array(
+            'primary' => false,
+            'unique'  => false,
+            'foreign' => false,
+            'check'   => false,
+            'fields'  => array(),
+            'references' => array(
+                'table'  => '',
+                'fields' => array(),
+            ),
+            'onupdate'  => '',
+            'ondelete'  => '',
+            'match'     => '',
+            'deferrable'        => false,
+            'initiallydeferred' => false,
+        );
+        if (!$sql) {
+            $query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
+            if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+                $query.= 'LOWER(name)='.$db->quote(strtolower($table), 'text');
+            } else {
+                $query.= 'name='.$db->quote($table, 'text');
+            }
+            $query.= " AND sql NOT NULL ORDER BY name";
+            $sql = $db->queryOne($query, 'text');
+            if (PEAR::isError($sql)) {
+                return $sql;
+            }
+            if ($constraint_name == 'primary') {
+                // search in table definition for PRIMARY KEYs
+                if (preg_match("/\bPRIMARY\s+KEY\b\s*\(([^)]+)/i", $sql, $tmp)) {
+                    $definition['primary'] = true;
+                    $definition['fields'] = array();
+                    $column_names = split(',', $tmp[1]);
+                    $colpos = 1;
+                    foreach ($column_names as $column_name) {
+                        $definition['fields'][trim($column_name)] = array(
+                            'position' => $colpos++
+                        );
+                    }
+                    return $definition;
+                }
+                if (preg_match("/\"([^\"]+)\"[^\,\"]+\bPRIMARY\s+KEY\b[^\,\)]*/i", $sql, $tmp)) {
+                    $definition['primary'] = true;
+                    $definition['fields'] = array();
+                    $column_names = split(',', $tmp[1]);
+                    $colpos = 1;
+                    foreach ($column_names as $column_name) {
+                        $definition['fields'][trim($column_name)] = array(
+                            'position' => $colpos++
+                        );
+                    }
+                    return $definition;
+                }
+            } else {
+                // search in table definition for FOREIGN KEYs
+                $pattern = "/\bCONSTRAINT\b\s+%s\s+
+                    \bFOREIGN\s+KEY\b\s*\(([^\)]+)\)\s*
+                    \bREFERENCES\b\s+([^\s]+)\s*\(([^\)]+)\)\s*
+                    (?:\bMATCH\s*([^\s]+))?\s*
+                    (?:\bON\s+UPDATE\s+([^\s,\)]+))?\s*
+                    (?:\bON\s+DELETE\s+([^\s,\)]+))?\s*
+                    /imsx";
+                $found_fk = false;
+                if (preg_match(sprintf($pattern, $constraint_name_mdb2), $sql, $tmp)) {
+                    $found_fk = true;
+                } elseif (preg_match(sprintf($pattern, $constraint_name), $sql, $tmp)) {
+                    $found_fk = true;
+                }
+                if ($found_fk) {
+                    $definition['foreign'] = true;
+                    $definition['match'] = 'SIMPLE';
+                    $definition['onupdate'] = 'NO ACTION';
+                    $definition['ondelete'] = 'NO ACTION';
+                    $definition['references']['table'] = $tmp[2];
+                    $column_names = split(',', $tmp[1]);
+                    $colpos = 1;
+                    foreach ($column_names as $column_name) {
+                        $definition['fields'][trim($column_name)] = array(
+                            'position' => $colpos++
+                        );
+                    }
+                    $referenced_cols = split(',', $tmp[3]);
+                    $colpos = 1;
+                    foreach ($referenced_cols as $column_name) {
+                        $definition['references']['fields'][trim($column_name)] = array(
+                            'position' => $colpos++
+                        );
+                    }
+                    if (isset($tmp[4])) {
+                        $definition['match']    = $tmp[4];
+                    }
+                    if (isset($tmp[5])) {
+                        $definition['onupdate'] = $tmp[5];
+                    }
+                    if (isset($tmp[6])) {
+                        $definition['ondelete'] = $tmp[6];
+                    }
+                    return $definition;
+                }
+            }
+            $sql = false;
+        }
+        if (!$sql) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                $constraint_name . ' is not an existing table constraint', __FUNCTION__);
+        }
+
+        $sql = strtolower($sql);
+        $start_pos = strpos($sql, '(');
+        $end_pos   = strrpos($sql, ')');
+        $column_names = substr($sql, $start_pos+1, $end_pos-$start_pos-1);
+        $column_names = split(',', $column_names);
+
+        if (!preg_match("/^create unique/", $sql)) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                $constraint_name . ' is not an existing table constraint', __FUNCTION__);
+        }
+
+        $definition['unique'] = true;
+        $count = count($column_names);
+        for ($i=0; $i<$count; ++$i) {
+            $column_name = strtok($column_names[$i]," ");
+            $collation = strtok(" ");
+            $definition['fields'][$column_name] = array(
+                'position' => $i+1
+            );
+            if (!empty($collation)) {
+                $definition['fields'][$column_name]['sorting'] =
+                    ($collation=='ASC' ? 'ascending' : 'descending');
+            }
+        }
+
+        if (empty($definition['fields'])) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                $constraint_name . ' is not an existing table constraint', __FUNCTION__);
+        }
+        return $definition;
+    }
+
+    // }}}
+    // {{{ getTriggerDefinition()
+
+    /**
+     * Get the structure of a trigger into an array
+     *
+     * EXPERIMENTAL
+     *
+     * WARNING: this function is experimental and may change the returned value
+     * at any time until labelled as non-experimental
+     *
+     * @param string    $trigger    name of trigger that should be used in method
+     * @return mixed data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function getTriggerDefinition($trigger)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $query = "SELECT name as trigger_name,
+                         tbl_name AS table_name,
+                         sql AS trigger_body,
+                         NULL AS trigger_type,
+                         NULL AS trigger_event,
+                         NULL AS trigger_comment,
+                         1 AS trigger_enabled
+                    FROM sqlite_master
+                   WHERE type='trigger'";
+        if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $query.= ' AND LOWER(name)='.$db->quote(strtolower($trigger), 'text');
+        } else {
+            $query.= ' AND name='.$db->quote($trigger, 'text');
+        }
+        $types = array(
+            'trigger_name'    => 'text',
+            'table_name'      => 'text',
+            'trigger_body'    => 'text',
+            'trigger_type'    => 'text',
+            'trigger_event'   => 'text',
+            'trigger_comment' => 'text',
+            'trigger_enabled' => 'boolean',
+        );
+        $def = $db->queryRow($query, $types, MDB2_FETCHMODE_ASSOC);
+        if (PEAR::isError($def)) {
+            return $def;
+        }
+        if (empty($def)) {
+            return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'it was not specified an existing trigger', __FUNCTION__);
+        }
+        if (preg_match("/^create\s+(?:temp|temporary)?trigger\s+(?:if\s+not\s+exists\s+)?.*(before|after)?\s+(insert|update|delete)/Uims", $def['trigger_body'], $tmp)) {
+            $def['trigger_type'] = strtoupper($tmp[1]);
+            $def['trigger_event'] = strtoupper($tmp[2]);
+        }
+        return $def;
+    }
+
+    // }}}
+    // {{{ tableInfo()
+
+    /**
+     * Returns information about a table
+     *
+     * @param string         $result  a string containing the name of a table
+     * @param int            $mode    a valid tableInfo mode
+     *
+     * @return array  an associative array with the information requested.
+     *                 A MDB2_Error object on failure.
+     *
+     * @see MDB2_Driver_Common::tableInfo()
+     * @since Method available since Release 1.7.0
+     */
+    function tableInfo($result, $mode = null)
+    {
+        if (is_string($result)) {
+           return parent::tableInfo($result, $mode);
+        }
+
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        return $db->raiseError(MDB2_ERROR_NOT_CAPABLE, null, null,
+           'This DBMS can not obtain tableInfo from result sets', __FUNCTION__);
+    }
+}
+
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/mysql.php b/inc/MDB2/Driver/mysql.php
new file mode 100755
index 00000000000..5c8df3b6b68
--- /dev/null
+++ b/inc/MDB2/Driver/mysql.php
@@ -0,0 +1,1700 @@
+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: mysql.php,v 1.214 2008/11/16 21:45:08 quipo Exp $
+//
+
+/**
+ * MDB2 MySQL driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_mysql extends MDB2_Driver_Common
+{
+    // {{{ properties
+
+    var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => '\\', 'escape_pattern' => '\\');
+
+    var $identifier_quoting = array('start' => '`', 'end' => '`', 'escape' => '`');
+
+    var $sql_comments = array(
+        array('start' => '-- ', 'end' => "\n", 'escape' => false),
+        array('start' => '#', 'end' => "\n", 'escape' => false),
+        array('start' => '/*', 'end' => '*/', 'escape' => false),
+    );
+
+    var $server_capabilities_checked = false;
+
+    var $start_transaction = false;
+
+    var $varchar_max_length = 255;
+
+    // }}}
+    // {{{ constructor
+
+    /**
+     * Constructor
+     */
+    function __construct()
+    {
+        parent::__construct();
+
+        $this->phptype = 'mysql';
+        $this->dbsyntax = 'mysql';
+
+        $this->supported['sequences'] = 'emulated';
+        $this->supported['indexes'] = true;
+        $this->supported['affected_rows'] = true;
+        $this->supported['transactions'] = false;
+        $this->supported['savepoints'] = false;
+        $this->supported['summary_functions'] = true;
+        $this->supported['order_by_text'] = true;
+        $this->supported['current_id'] = 'emulated';
+        $this->supported['limit_queries'] = true;
+        $this->supported['LOBs'] = true;
+        $this->supported['replace'] = true;
+        $this->supported['sub_selects'] = 'emulated';
+        $this->supported['triggers'] = false;
+        $this->supported['auto_increment'] = true;
+        $this->supported['primary_key'] = true;
+        $this->supported['result_introspection'] = true;
+        $this->supported['prepared_statements'] = 'emulated';
+        $this->supported['identifier_quoting'] = true;
+        $this->supported['pattern_escaping'] = true;
+        $this->supported['new_link'] = true;
+
+        $this->options['DBA_username'] = false;
+        $this->options['DBA_password'] = false;
+        $this->options['default_table_type'] = '';
+        $this->options['max_identifiers_length'] = 64;
+
+        $this->_reCheckSupportedOptions();
+    }
+
+    // }}}
+    // {{{ _reCheckSupportedOptions()
+    
+    /**
+     * If the user changes certain options, other capabilities may depend
+     * on the new settings, so we need to check them (again).
+     *
+     * @access private
+     */
+    function _reCheckSupportedOptions()
+    {
+        $this->supported['transactions'] = $this->options['use_transactions'];
+        $this->supported['savepoints']   = $this->options['use_transactions'];
+        if ($this->options['default_table_type']) {
+            switch (strtoupper($this->options['default_table_type'])) {
+            case 'BLACKHOLE':
+            case 'MEMORY':
+            case 'ARCHIVE':
+            case 'CSV':
+            case 'HEAP':
+            case 'ISAM':
+            case 'MERGE':
+            case 'MRG_ISAM':
+            case 'ISAM':
+            case 'MRG_MYISAM':
+            case 'MYISAM':
+                $this->supported['savepoints']   = false;
+                $this->supported['transactions'] = false;
+                $this->warnings[] = $this->options['default_table_type'] .
+                    ' is not a supported default table type';
+                break;
+            }
+        }
+    }
+
+    // }}}
+    // {{{ function setOption($option, $value)
+
+    /**
+     * set the option for the db class
+     *
+     * @param   string  option name
+     * @param   mixed   value for the option
+     *
+     * @return  mixed   MDB2_OK or MDB2 Error Object
+     *
+     * @access  public
+     */
+    function setOption($option, $value)
+    {
+        $res = parent::setOption($option, $value);
+        $this->_reCheckSupportedOptions();
+    }
+
+    // }}}
+    // {{{ errorInfo()
+
+    /**
+     * This method is used to collect information about an error
+     *
+     * @param integer $error
+     * @return array
+     * @access public
+     */
+    function errorInfo($error = null)
+    {
+        if ($this->connection) {
+            $native_code = @mysql_errno($this->connection);
+            $native_msg  = @mysql_error($this->connection);
+        } else {
+            $native_code = @mysql_errno();
+            $native_msg  = @mysql_error();
+        }
+        if (is_null($error)) {
+            static $ecode_map;
+            if (empty($ecode_map)) {
+                $ecode_map = array(
+                    1000 => MDB2_ERROR_INVALID, //hashchk
+                    1001 => MDB2_ERROR_INVALID, //isamchk
+                    1004 => MDB2_ERROR_CANNOT_CREATE,
+                    1005 => MDB2_ERROR_CANNOT_CREATE,
+                    1006 => MDB2_ERROR_CANNOT_CREATE,
+                    1007 => MDB2_ERROR_ALREADY_EXISTS,
+                    1008 => MDB2_ERROR_CANNOT_DROP,
+                    1009 => MDB2_ERROR_CANNOT_DROP,
+                    1010 => MDB2_ERROR_CANNOT_DROP,
+                    1011 => MDB2_ERROR_CANNOT_DELETE,
+                    1022 => MDB2_ERROR_ALREADY_EXISTS,
+                    1029 => MDB2_ERROR_NOT_FOUND,
+                    1032 => MDB2_ERROR_NOT_FOUND,
+                    1044 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1045 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1046 => MDB2_ERROR_NODBSELECTED,
+                    1048 => MDB2_ERROR_CONSTRAINT,
+                    1049 => MDB2_ERROR_NOSUCHDB,
+                    1050 => MDB2_ERROR_ALREADY_EXISTS,
+                    1051 => MDB2_ERROR_NOSUCHTABLE,
+                    1054 => MDB2_ERROR_NOSUCHFIELD,
+                    1060 => MDB2_ERROR_ALREADY_EXISTS,
+                    1061 => MDB2_ERROR_ALREADY_EXISTS,
+                    1062 => MDB2_ERROR_ALREADY_EXISTS,
+                    1064 => MDB2_ERROR_SYNTAX,
+                    1067 => MDB2_ERROR_INVALID,
+                    1072 => MDB2_ERROR_NOT_FOUND,
+                    1086 => MDB2_ERROR_ALREADY_EXISTS,
+                    1091 => MDB2_ERROR_NOT_FOUND,
+                    1100 => MDB2_ERROR_NOT_LOCKED,
+                    1109 => MDB2_ERROR_NOT_FOUND,
+                    1125 => MDB2_ERROR_ALREADY_EXISTS,
+                    1136 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+                    1138 => MDB2_ERROR_INVALID,
+                    1142 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1143 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1146 => MDB2_ERROR_NOSUCHTABLE,
+                    1149 => MDB2_ERROR_SYNTAX,
+                    1169 => MDB2_ERROR_CONSTRAINT,
+                    1176 => MDB2_ERROR_NOT_FOUND,
+                    1177 => MDB2_ERROR_NOSUCHTABLE,
+                    1213 => MDB2_ERROR_DEADLOCK,
+                    1216 => MDB2_ERROR_CONSTRAINT,
+                    1217 => MDB2_ERROR_CONSTRAINT,
+                    1227 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1235 => MDB2_ERROR_CANNOT_CREATE,
+                    1299 => MDB2_ERROR_INVALID_DATE,
+                    1300 => MDB2_ERROR_INVALID,
+                    1304 => MDB2_ERROR_ALREADY_EXISTS,
+                    1305 => MDB2_ERROR_NOT_FOUND,
+                    1306 => MDB2_ERROR_CANNOT_DROP,
+                    1307 => MDB2_ERROR_CANNOT_CREATE,
+                    1334 => MDB2_ERROR_CANNOT_ALTER,
+                    1339 => MDB2_ERROR_NOT_FOUND,
+                    1356 => MDB2_ERROR_INVALID,
+                    1359 => MDB2_ERROR_ALREADY_EXISTS,
+                    1360 => MDB2_ERROR_NOT_FOUND,
+                    1363 => MDB2_ERROR_NOT_FOUND,
+                    1365 => MDB2_ERROR_DIVZERO,
+                    1451 => MDB2_ERROR_CONSTRAINT,
+                    1452 => MDB2_ERROR_CONSTRAINT,
+                    1542 => MDB2_ERROR_CANNOT_DROP,
+                    1546 => MDB2_ERROR_CONSTRAINT,
+                    1582 => MDB2_ERROR_CONSTRAINT,
+                    2003 => MDB2_ERROR_CONNECT_FAILED,
+                    2019 => MDB2_ERROR_INVALID,
+                );
+            }
+            if ($this->options['portability'] & MDB2_PORTABILITY_ERRORS) {
+                $ecode_map[1022] = MDB2_ERROR_CONSTRAINT;
+                $ecode_map[1048] = MDB2_ERROR_CONSTRAINT_NOT_NULL;
+                $ecode_map[1062] = MDB2_ERROR_CONSTRAINT;
+            } else {
+                // Doing this in case mode changes during runtime.
+                $ecode_map[1022] = MDB2_ERROR_ALREADY_EXISTS;
+                $ecode_map[1048] = MDB2_ERROR_CONSTRAINT;
+                $ecode_map[1062] = MDB2_ERROR_ALREADY_EXISTS;
+            }
+            if (isset($ecode_map[$native_code])) {
+                $error = $ecode_map[$native_code];
+            }
+        }
+        return array($error, $native_code, $native_msg);
+    }
+
+    // }}}
+    // {{{ escape()
+
+    /**
+     * Quotes a string so it can be safely used in a query. It will quote
+     * the text so it can safely be used within a query.
+     *
+     * @param   string  the input string to quote
+     * @param   bool    escape wildcards
+     *
+     * @return  string  quoted string
+     *
+     * @access  public
+     */
+    function escape($text, $escape_wildcards = false)
+    {
+        if ($escape_wildcards) {
+            $text = $this->escapePattern($text);
+        }
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        $text = @mysql_real_escape_string($text, $connection);
+        return $text;
+    }
+
+    // }}}
+    // {{{ beginTransaction()
+
+    /**
+     * Start a transaction or set a savepoint.
+     *
+     * @param   string  name of a savepoint to set
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function beginTransaction($savepoint = null)
+    {
+        $this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        $this->_getServerCapabilities();
+        if (!is_null($savepoint)) {
+            if (!$this->supports('savepoints')) {
+                return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'savepoints are not supported', __FUNCTION__);
+            }
+            if (!$this->in_transaction) {
+                return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                    'savepoint cannot be released when changes are auto committed', __FUNCTION__);
+            }
+            $query = 'SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        } elseif ($this->in_transaction) {
+            return MDB2_OK;  //nothing to do
+        }
+        if (!$this->destructor_registered && $this->opened_persistent) {
+            $this->destructor_registered = true;
+            register_shutdown_function('MDB2_closeOpenTransactions');
+        }
+        $query = $this->start_transaction ? 'START TRANSACTION' : 'SET AUTOCOMMIT = 0';
+        $result =& $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = true;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ commit()
+
+    /**
+     * Commit the database changes done during a transaction that is in
+     * progress or release a savepoint. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after committing the pending changes.
+     *
+     * @param   string  name of a savepoint to release
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function commit($savepoint = null)
+    {
+        $this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (!is_null($savepoint)) {
+            if (!$this->supports('savepoints')) {
+                return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'savepoints are not supported', __FUNCTION__);
+            }
+            $server_info = $this->getServerVersion();
+            if (version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '5.0.3', '<')) {
+                return MDB2_OK;
+            }
+            $query = 'RELEASE SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        }
+
+        if (!$this->supports('transactions')) {
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'transactions are not supported', __FUNCTION__);
+        }
+
+        $result =& $this->_doQuery('COMMIT', true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if (!$this->start_transaction) {
+            $query = 'SET AUTOCOMMIT = 1';
+            $result =& $this->_doQuery($query, true);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ rollback()
+
+    /**
+     * Cancel any database changes done during a transaction or since a specific
+     * savepoint that is in progress. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after canceling the pending changes.
+     *
+     * @param   string  name of a savepoint to rollback to
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function rollback($savepoint = null)
+    {
+        $this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'rollback cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (!is_null($savepoint)) {
+            if (!$this->supports('savepoints')) {
+                return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'savepoints are not supported', __FUNCTION__);
+            }
+            $query = 'ROLLBACK TO SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        }
+
+        $query = 'ROLLBACK';
+        $result =& $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if (!$this->start_transaction) {
+            $query = 'SET AUTOCOMMIT = 1';
+            $result =& $this->_doQuery($query, true);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ function setTransactionIsolation()
+
+    /**
+     * Set the transacton isolation level.
+     *
+     * @param   string  standard isolation level
+     *                  READ UNCOMMITTED (allows dirty reads)
+     *                  READ COMMITTED (prevents dirty reads)
+     *                  REPEATABLE READ (prevents nonrepeatable reads)
+     *                  SERIALIZABLE (prevents phantom reads)
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     * @since   2.1.1
+     */
+    function setTransactionIsolation($isolation)
+    {
+        $this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
+        if (!$this->supports('transactions')) {
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'transactions are not supported', __FUNCTION__);
+        }
+        switch ($isolation) {
+        case 'READ UNCOMMITTED':
+        case 'READ COMMITTED':
+        case 'REPEATABLE READ':
+        case 'SERIALIZABLE':
+            break;
+        default:
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'isolation level is not supported: '.$isolation, __FUNCTION__);
+        }
+
+        $query = "SET SESSION TRANSACTION ISOLATION LEVEL $isolation";
+        return $this->_doQuery($query, true);
+    }
+
+    // }}}
+    // {{{ _doConnect()
+
+    /**
+     * do the grunt work of the connect
+     *
+     * @return connection on success or MDB2 Error Object on failure
+     * @access protected
+     */
+    function _doConnect($username, $password, $persistent = false)
+    {
+        if (!PEAR::loadExtension($this->phptype)) {
+            return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
+        }
+
+        $params = array();
+        if ($this->dsn['protocol'] && $this->dsn['protocol'] == 'unix') {
+            $params[0] = ':' . $this->dsn['socket'];
+        } else {
+            $params[0] = $this->dsn['hostspec'] ? $this->dsn['hostspec']
+                         : 'localhost';
+            if ($this->dsn['port']) {
+                $params[0].= ':' . $this->dsn['port'];
+            }
+        }
+        $params[] = $username ? $username : null;
+        $params[] = $password ? $password : null;
+        if (!$persistent) {
+            if ($this->_isNewLinkSet()) {
+                $params[] = true;
+            } else {
+                $params[] = false;
+            }
+        }
+        if (version_compare(phpversion(), '4.3.0', '>=')) {
+            $params[] = isset($this->dsn['client_flags'])
+                ? $this->dsn['client_flags'] : null;
+        }
+        $connect_function = $persistent ? 'mysql_pconnect' : 'mysql_connect';
+
+        $connection = @call_user_func_array($connect_function, $params);
+        if (!$connection) {
+            if (($err = @mysql_error()) != '') {
+                return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+                    $err, __FUNCTION__);
+            } else {
+                return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+                    'unable to establish a connection', __FUNCTION__);
+            }
+        }
+
+        if (!empty($this->dsn['charset'])) {
+            $result = $this->setCharset($this->dsn['charset'], $connection);
+            if (PEAR::isError($result)) {
+                $this->disconnect(false);
+                return $result;
+            }
+        }
+
+        return $connection;
+    }
+
+    // }}}
+    // {{{ connect()
+
+    /**
+     * Connect to the database
+     *
+     * @return MDB2_OK on success, MDB2 Error Object on failure
+     * @access public
+     */
+    function connect()
+    {
+        if (is_resource($this->connection)) {
+            //if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
+            if (MDB2::areEquals($this->connected_dsn, $this->dsn)
+                && $this->opened_persistent == $this->options['persistent']
+            ) {
+                return MDB2_OK;
+            }
+            $this->disconnect(false);
+        }
+
+        $connection = $this->_doConnect(
+            $this->dsn['username'],
+            $this->dsn['password'],
+            $this->options['persistent']
+        );
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $this->connection = $connection;
+        $this->connected_dsn = $this->dsn;
+        $this->connected_database_name = '';
+        $this->opened_persistent = $this->options['persistent'];
+        $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
+
+        if ($this->database_name) {
+            if ($this->database_name != $this->connected_database_name) {
+                if (!@mysql_select_db($this->database_name, $connection)) {
+                    $err = $this->raiseError(null, null, null,
+                        'Could not select the database: '.$this->database_name, __FUNCTION__);
+                    return $err;
+                }
+                $this->connected_database_name = $this->database_name;
+            }
+        }
+
+        $this->_getServerCapabilities();
+
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ setCharset()
+
+    /**
+     * Set the charset on the current connection
+     *
+     * @param string    charset (or array(charset, collation))
+     * @param resource  connection handle
+     *
+     * @return true on success, MDB2 Error Object on failure
+     */
+    function setCharset($charset, $connection = null)
+    {
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        $collation = null;
+        if (is_array($charset) && 2 == count($charset)) {
+            $collation = array_pop($charset);
+            $charset   = array_pop($charset);
+        }
+        $client_info = mysql_get_client_info();
+        if (function_exists('mysql_set_charset') && version_compare($client_info, '5.0.6')) {
+            if (!$result = mysql_set_charset($charset, $connection)) {
+                $err =& $this->raiseError(null, null, null,
+                    'Could not set client character set', __FUNCTION__);
+                return $err;
+            }
+            return $result;
+        }
+        $query = "SET NAMES '".mysql_real_escape_string($charset, $connection)."'";
+        if (!is_null($collation)) {
+            $query .= " COLLATE '".mysqli_real_escape_string($connection, $collation)."'";
+        }
+        return $this->_doQuery($query, true, $connection);
+    }
+
+    // }}}
+    // {{{ databaseExists()
+
+    /**
+     * check if given database name is exists?
+     *
+     * @param string $name    name of the database that should be checked
+     *
+     * @return mixed true/false on success, a MDB2 error on failure
+     * @access public
+     */
+    function databaseExists($name)
+    {
+        $connection = $this->_doConnect($this->dsn['username'],
+                                        $this->dsn['password'],
+                                        $this->options['persistent']);
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $result = @mysql_select_db($name, $connection);
+        @mysql_close($connection);
+
+        return $result;
+    }
+
+    // }}}
+    // {{{ disconnect()
+
+    /**
+     * Log out and disconnect from the database.
+     *
+     * @param  boolean $force if the disconnect should be forced even if the
+     *                        connection is opened persistently
+     * @return mixed true on success, false if not connected and error
+     *                object on error
+     * @access public
+     */
+    function disconnect($force = true)
+    {
+        if (is_resource($this->connection)) {
+            if ($this->in_transaction) {
+                $dsn = $this->dsn;
+                $database_name = $this->database_name;
+                $persistent = $this->options['persistent'];
+                $this->dsn = $this->connected_dsn;
+                $this->database_name = $this->connected_database_name;
+                $this->options['persistent'] = $this->opened_persistent;
+                $this->rollback();
+                $this->dsn = $dsn;
+                $this->database_name = $database_name;
+                $this->options['persistent'] = $persistent;
+            }
+
+            if (!$this->opened_persistent || $force) {
+                $ok = @mysql_close($this->connection);
+                if (!$ok) {
+                    return $this->raiseError(MDB2_ERROR_DISCONNECT_FAILED,
+                           null, null, null, __FUNCTION__);
+                }
+            }
+        } else {
+            return false;
+        }
+        return parent::disconnect($force);
+    }
+
+    // }}}
+    // {{{ standaloneQuery()
+
+   /**
+     * execute a query as DBA
+     *
+     * @param string $query the SQL query
+     * @param mixed   $types  array that contains the types of the columns in
+     *                        the result set
+     * @param boolean $is_manip  if the query is a manipulation query
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function &standaloneQuery($query, $types = null, $is_manip = false)
+    {
+        $user = $this->options['DBA_username']? $this->options['DBA_username'] : $this->dsn['username'];
+        $pass = $this->options['DBA_password']? $this->options['DBA_password'] : $this->dsn['password'];
+        $connection = $this->_doConnect($user, $pass, $this->options['persistent']);
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $offset = $this->offset;
+        $limit = $this->limit;
+        $this->offset = $this->limit = 0;
+        $query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
+        
+        $result =& $this->_doQuery($query, $is_manip, $connection, $this->database_name);
+        if (!PEAR::isError($result)) {
+            $result = $this->_affectedRows($connection, $result);
+        }
+
+        @mysql_close($connection);
+        return $result;
+    }
+
+    // }}}
+    // {{{ _doQuery()
+
+    /**
+     * Execute a query
+     * @param string $query  query
+     * @param boolean $is_manip  if the query is a manipulation query
+     * @param resource $connection
+     * @param string $database_name
+     * @return result or error object
+     * @access protected
+     */
+    function &_doQuery($query, $is_manip = false, $connection = null, $database_name = null)
+    {
+        $this->last_query = $query;
+        $result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
+        if ($result) {
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            $query = $result;
+        }
+        if ($this->options['disable_query']) {
+            $result = $is_manip ? 0 : null;
+            return $result;
+        }
+
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        if (is_null($database_name)) {
+            $database_name = $this->database_name;
+        }
+
+        if ($database_name) {
+            if ($database_name != $this->connected_database_name) {
+                if (!@mysql_select_db($database_name, $connection)) {
+                    $err = $this->raiseError(null, null, null,
+                        'Could not select the database: '.$database_name, __FUNCTION__);
+                    return $err;
+                }
+                $this->connected_database_name = $database_name;
+            }
+        }
+
+        $function = $this->options['result_buffering']
+            ? 'mysql_query' : 'mysql_unbuffered_query';
+        $result = @$function($query, $connection);
+        if (!$result) {
+            $err =& $this->raiseError(null, null, null,
+                'Could not execute statement', __FUNCTION__);
+            return $err;
+        }
+
+        $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
+        return $result;
+    }
+
+    // }}}
+    // {{{ _affectedRows()
+
+    /**
+     * Returns the number of rows affected
+     *
+     * @param resource $result
+     * @param resource $connection
+     * @return mixed MDB2 Error Object or the number of rows affected
+     * @access private
+     */
+    function _affectedRows($connection, $result = null)
+    {
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        return @mysql_affected_rows($connection);
+    }
+
+    // }}}
+    // {{{ _modifyQuery()
+
+    /**
+     * Changes a query string for various DBMS specific reasons
+     *
+     * @param string $query  query to modify
+     * @param boolean $is_manip  if it is a DML query
+     * @param integer $limit  limit the number of rows
+     * @param integer $offset  start reading from given offset
+     * @return string modified query
+     * @access protected
+     */
+    function _modifyQuery($query, $is_manip, $limit, $offset)
+    {
+        if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) {
+            // "DELETE FROM table" gives 0 affected rows in MySQL.
+            // This little hack lets you know how many rows were deleted.
+            if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
+                $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
+                                      'DELETE FROM \1 WHERE 1=1', $query);
+            }
+        }
+        if ($limit > 0
+            && !preg_match('/LIMIT\s*\d(?:\s*(?:,|OFFSET)\s*\d+)?(?:[^\)]*)?$/i', $query)
+        ) {
+            $query = rtrim($query);
+            if (substr($query, -1) == ';') {
+                $query = substr($query, 0, -1);
+            }
+
+            // LIMIT doesn't always come last in the query
+            // @see http://dev.mysql.com/doc/refman/5.0/en/select.html
+            $after = '';
+            if (preg_match('/(\s+INTO\s+(?:OUT|DUMP)FILE\s.*)$/ims', $query, $matches)) {
+                $after = $matches[0];
+                $query = preg_replace('/(\s+INTO\s+(?:OUT|DUMP)FILE\s.*)$/ims', '', $query);
+            } elseif (preg_match('/(\s+FOR\s+UPDATE\s*)$/i', $query, $matches)) {
+               $after = $matches[0];
+               $query = preg_replace('/(\s+FOR\s+UPDATE\s*)$/im', '', $query);
+            } elseif (preg_match('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', $query, $matches)) {
+               $after = $matches[0];
+               $query = preg_replace('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', '', $query);
+            }
+
+            if ($is_manip) {
+                return $query . " LIMIT $limit" . $after;
+            } else {
+                return $query . " LIMIT $offset, $limit" . $after;
+            }
+        }
+        return $query;
+    }
+
+    // }}}
+    // {{{ getServerVersion()
+
+    /**
+     * return version information about the server
+     *
+     * @param bool   $native  determines if the raw version string should be returned
+     * @return mixed array/string with version information or MDB2 error object
+     * @access public
+     */
+    function getServerVersion($native = false)
+    {
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        if ($this->connected_server_info) {
+            $server_info = $this->connected_server_info;
+        } else {
+            $server_info = @mysql_get_server_info($connection);
+        }
+        if (!$server_info) {
+            return $this->raiseError(null, null, null,
+                'Could not get server information', __FUNCTION__);
+        }
+        // cache server_info
+        $this->connected_server_info = $server_info;
+        if (!$native) {
+            $tmp = explode('.', $server_info, 3);
+            if (isset($tmp[2]) && strpos($tmp[2], '-')) {
+                $tmp2 = explode('-', @$tmp[2], 2);
+            } else {
+                $tmp2[0] = isset($tmp[2]) ? $tmp[2] : null;
+                $tmp2[1] = null;
+            }
+            $server_info = array(
+                'major' => isset($tmp[0]) ? $tmp[0] : null,
+                'minor' => isset($tmp[1]) ? $tmp[1] : null,
+                'patch' => $tmp2[0],
+                'extra' => $tmp2[1],
+                'native' => $server_info,
+            );
+        }
+        return $server_info;
+    }
+
+    // }}}
+    // {{{ _getServerCapabilities()
+
+    /**
+     * Fetch some information about the server capabilities
+     * (transactions, subselects, prepared statements, etc).
+     *
+     * @access private
+     */
+    function _getServerCapabilities()
+    {
+        if (!$this->server_capabilities_checked) {
+            $this->server_capabilities_checked = true;
+
+            //set defaults
+            $this->supported['sub_selects'] = 'emulated';
+            $this->supported['prepared_statements'] = 'emulated';
+            $this->supported['triggers'] = false;
+            $this->start_transaction = false;
+            $this->varchar_max_length = 255;
+            
+            $server_info = $this->getServerVersion();
+            if (is_array($server_info)) {
+                $server_version = $server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'];
+
+                if (!version_compare($server_version, '4.1.0', '<')) {
+                    $this->supported['sub_selects'] = true;
+                    $this->supported['prepared_statements'] = true;
+                }
+
+                // SAVEPOINTs were introduced in MySQL 4.0.14 and 4.1.1 (InnoDB)
+                if (version_compare($server_version, '4.1.0', '>=')) {
+                    if (version_compare($server_version, '4.1.1', '<')) {
+                        $this->supported['savepoints'] = false;
+                    }
+                } elseif (version_compare($server_version, '4.0.14', '<')) {
+                    $this->supported['savepoints'] = false;
+                }
+
+                if (!version_compare($server_version, '4.0.11', '<')) {
+                    $this->start_transaction = true;
+                }
+
+                if (!version_compare($server_version, '5.0.3', '<')) {
+                    $this->varchar_max_length = 65532;
+                }
+
+                if (!version_compare($server_version, '5.0.2', '<')) {
+                    $this->supported['triggers'] = true;
+                }
+            }
+        }
+    }
+
+    // }}}
+    // {{{ function _skipUserDefinedVariable($query, $position)
+
+    /**
+     * Utility method, used by prepare() to avoid misinterpreting MySQL user 
+     * defined variables (SELECT @x:=5) for placeholders.
+     * Check if the placeholder is a false positive, i.e. if it is an user defined
+     * variable instead. If so, skip it and advance the position, otherwise
+     * return the current position, which is valid
+     *
+     * @param string $query
+     * @param integer $position current string cursor position
+     * @return integer $new_position
+     * @access protected
+     */
+    function _skipUserDefinedVariable($query, $position)
+    {
+        $found = strpos(strrev(substr($query, 0, $position)), '@');
+        if ($found === false) {
+            return $position;
+        }
+        $pos = strlen($query) - strlen(substr($query, $position)) - $found - 1;
+        $substring = substr($query, $pos, $position - $pos + 2);
+        if (preg_match('/^@\w+\s*:=$/', $substring)) {
+            return $position + 1; //found an user defined variable: skip it
+        }
+        return $position;
+    }
+
+    // }}}
+    // {{{ prepare()
+
+    /**
+     * Prepares a query for multiple execution with execute().
+     * With some database backends, this is emulated.
+     * prepare() requires a generic query as string like
+     * 'INSERT INTO numbers VALUES(?,?)' or
+     * 'INSERT INTO numbers VALUES(:foo,:bar)'.
+     * The ? and :name and are placeholders which can be set using
+     * bindParam() and the query can be sent off using the execute() method.
+     * The allowed format for :name can be set with the 'bindname_format' option.
+     *
+     * @param string $query the query to prepare
+     * @param mixed   $types  array that contains the types of the placeholders
+     * @param mixed   $result_types  array that contains the types of the columns in
+     *                        the result set or MDB2_PREPARE_RESULT, if set to
+     *                        MDB2_PREPARE_MANIP the query is handled as a manipulation query
+     * @param mixed   $lobs   key (field) value (parameter) pair for all lob placeholders
+     * @return mixed resource handle for the prepared query on success, a MDB2
+     *        error on failure
+     * @access public
+     * @see bindParam, execute
+     */
+    function &prepare($query, $types = null, $result_types = null, $lobs = array())
+    {
+        if ($this->options['emulate_prepared']
+            || $this->supported['prepared_statements'] !== true
+        ) {
+            $obj =& parent::prepare($query, $types, $result_types, $lobs);
+            return $obj;
+        }
+        $is_manip = ($result_types === MDB2_PREPARE_MANIP);
+        $offset = $this->offset;
+        $limit = $this->limit;
+        $this->offset = $this->limit = 0;
+        $query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
+        $result = $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'pre'));
+        if ($result) {
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            $query = $result;
+        }
+        $placeholder_type_guess = $placeholder_type = null;
+        $question = '?';
+        $colon = ':';
+        $positions = array();
+        $position = 0;
+        while ($position < strlen($query)) {
+            $q_position = strpos($query, $question, $position);
+            $c_position = strpos($query, $colon, $position);
+            if ($q_position && $c_position) {
+                $p_position = min($q_position, $c_position);
+            } elseif ($q_position) {
+                $p_position = $q_position;
+            } elseif ($c_position) {
+                $p_position = $c_position;
+            } else {
+                break;
+            }
+            if (is_null($placeholder_type)) {
+                $placeholder_type_guess = $query[$p_position];
+            }
+            
+            $new_pos = $this->_skipDelimitedStrings($query, $position, $p_position);
+            if (PEAR::isError($new_pos)) {
+                return $new_pos;
+            }
+            if ($new_pos != $position) {
+                $position = $new_pos;
+                continue; //evaluate again starting from the new position
+            }
+            
+            //make sure this is not part of an user defined variable
+            $new_pos = $this->_skipUserDefinedVariable($query, $position);
+            if ($new_pos != $position) {
+                $position = $new_pos;
+                continue; //evaluate again starting from the new position
+            }
+
+            if ($query[$position] == $placeholder_type_guess) {
+                if (is_null($placeholder_type)) {
+                    $placeholder_type = $query[$p_position];
+                    $question = $colon = $placeholder_type;
+                }
+                if ($placeholder_type == ':') {
+                    $regexp = '/^.{'.($position+1).'}('.$this->options['bindname_format'].').*$/s';
+                    $parameter = preg_replace($regexp, '\\1', $query);
+                    if ($parameter === '') {
+                        $err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+                            'named parameter name must match "bindname_format" option', __FUNCTION__);
+                        return $err;
+                    }
+                    $positions[$p_position] = $parameter;
+                    $query = substr_replace($query, '?', $position, strlen($parameter)+1);
+                } else {
+                    $positions[$p_position] = count($positions);
+                }
+                $position = $p_position + 1;
+            } else {
+                $position = $p_position;
+            }
+        }
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        static $prep_statement_counter = 1;
+        $statement_name = sprintf($this->options['statement_format'], $this->phptype, $prep_statement_counter++ . sha1(microtime() + mt_rand()));
+        $statement_name = substr(strtolower($statement_name), 0, $this->options['max_identifiers_length']);
+        $query = "PREPARE $statement_name FROM ".$this->quote($query, 'text');
+        $statement =& $this->_doQuery($query, true, $connection);
+        if (PEAR::isError($statement)) {
+            return $statement;
+        }
+
+        $class_name = 'MDB2_Statement_'.$this->phptype;
+        $obj = new $class_name($this, $statement_name, $positions, $query, $types, $result_types, $is_manip, $limit, $offset);
+        $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'post', 'result' => $obj));
+        return $obj;
+    }
+
+    // }}}
+    // {{{ replace()
+
+    /**
+     * Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
+     * query, except that if there is already a row in the table with the same
+     * key field values, the old row is deleted before the new row is inserted.
+     *
+     * The REPLACE type of query does not make part of the SQL standards. Since
+     * practically only MySQL implements it natively, this type of query is
+     * emulated through this method for other DBMS using standard types of
+     * queries inside a transaction to assure the atomicity of the operation.
+     *
+     * @access public
+     *
+     * @param string $table name of the table on which the REPLACE query will
+     *  be executed.
+     * @param array $fields associative array that describes the fields and the
+     *  values that will be inserted or updated in the specified table. The
+     *  indexes of the array are the names of all the fields of the table. The
+     *  values of the array are also associative arrays that describe the
+     *  values and other properties of the table fields.
+     *
+     *  Here follows a list of field properties that need to be specified:
+     *
+     *    value:
+     *          Value to be assigned to the specified field. This value may be
+     *          of specified in database independent type format as this
+     *          function can perform the necessary datatype conversions.
+     *
+     *    Default:
+     *          this property is required unless the Null property
+     *          is set to 1.
+     *
+     *    type
+     *          Name of the type of the field. Currently, all types Metabase
+     *          are supported except for clob and blob.
+     *
+     *    Default: no type conversion
+     *
+     *    null
+     *          Boolean property that indicates that the value for this field
+     *          should be set to null.
+     *
+     *          The default value for fields missing in INSERT queries may be
+     *          specified the definition of a table. Often, the default value
+     *          is already null, but since the REPLACE may be emulated using
+     *          an UPDATE query, make sure that all fields of the table are
+     *          listed in this function argument array.
+     *
+     *    Default: 0
+     *
+     *    key
+     *          Boolean property that indicates that this field should be
+     *          handled as a primary key or at least as part of the compound
+     *          unique index of the table that will determine the row that will
+     *          updated if it exists or inserted a new row otherwise.
+     *
+     *          This function will fail if no key field is specified or if the
+     *          value of a key field is set to null because fields that are
+     *          part of unique index they may not be null.
+     *
+     *    Default: 0
+     *
+     * @see http://dev.mysql.com/doc/refman/5.0/en/replace.html
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     */
+    function replace($table, $fields)
+    {
+        $count = count($fields);
+        $query = $values = '';
+        $keys = $colnum = 0;
+        for (reset($fields); $colnum < $count; next($fields), $colnum++) {
+            $name = key($fields);
+            if ($colnum > 0) {
+                $query .= ',';
+                $values.= ',';
+            }
+            $query.= $this->quoteIdentifier($name, true);
+            if (isset($fields[$name]['null']) && $fields[$name]['null']) {
+                $value = 'NULL';
+            } else {
+                $type = isset($fields[$name]['type']) ? $fields[$name]['type'] : null;
+                $value = $this->quote($fields[$name]['value'], $type);
+                if (PEAR::isError($value)) {
+                    return $value;
+                }
+            }
+            $values.= $value;
+            if (isset($fields[$name]['key']) && $fields[$name]['key']) {
+                if ($value === 'NULL') {
+                    return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+                        'key value '.$name.' may not be NULL', __FUNCTION__);
+                }
+                $keys++;
+            }
+        }
+        if ($keys == 0) {
+            return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+                'not specified which fields are keys', __FUNCTION__);
+        }
+
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $table = $this->quoteIdentifier($table, true);
+        $query = "REPLACE INTO $table ($query) VALUES ($values)";
+        $result =& $this->_doQuery($query, true, $connection);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        return $this->_affectedRows($connection, $result);
+    }
+
+    // }}}
+    // {{{ nextID()
+
+    /**
+     * Returns the next free id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @param boolean $ondemand when true the sequence is
+     *                          automatic created, if it
+     *                          not exists
+     *
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function nextID($seq_name, $ondemand = true)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        $seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
+        $query = "INSERT INTO $sequence_name ($seqcol_name) VALUES (NULL)";
+        $this->pushErrorHandling(PEAR_ERROR_RETURN);
+        $this->expectError(MDB2_ERROR_NOSUCHTABLE);
+        $result =& $this->_doQuery($query, true);
+        $this->popExpect();
+        $this->popErrorHandling();
+        if (PEAR::isError($result)) {
+            if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
+                $this->loadModule('Manager', null, true);
+                $result = $this->manager->createSequence($seq_name);
+                if (PEAR::isError($result)) {
+                    return $this->raiseError($result, null, null,
+                        'on demand sequence '.$seq_name.' could not be created', __FUNCTION__);
+                } else {
+                    return $this->nextID($seq_name, false);
+                }
+            }
+            return $result;
+        }
+        $value = $this->lastInsertID();
+        if (is_numeric($value)) {
+            $query = "DELETE FROM $sequence_name WHERE $seqcol_name < $value";
+            $result =& $this->_doQuery($query, true);
+            if (PEAR::isError($result)) {
+                $this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
+            }
+        }
+        return $value;
+    }
+
+    // }}}
+    // {{{ lastInsertID()
+
+    /**
+     * Returns the autoincrement ID if supported or $id or fetches the current
+     * ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
+     *
+     * @param string $table name of the table into which a new row was inserted
+     * @param string $field name of the field into which a new row was inserted
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function lastInsertID($table = null, $field = null)
+    {
+        // not using mysql_insert_id() due to http://pear.php.net/bugs/bug.php?id=8051
+        return $this->queryOne('SELECT LAST_INSERT_ID()', 'integer');
+    }
+
+    // }}}
+    // {{{ currID()
+
+    /**
+     * Returns the current id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function currID($seq_name)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        $seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
+        $query = "SELECT MAX($seqcol_name) FROM $sequence_name";
+        return $this->queryOne($query, 'integer');
+    }
+}
+
+/**
+ * MDB2 MySQL result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Result_mysql extends MDB2_Result_Common
+{
+    // }}}
+    // {{{ fetchRow()
+
+    /**
+     * Fetch a row and insert the data into an existing array.
+     *
+     * @param int       $fetchmode  how the array data should be indexed
+     * @param int    $rownum    number of the row where the data can be found
+     * @return int data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
+    {
+        if (!is_null($rownum)) {
+            $seek = $this->seek($rownum);
+            if (PEAR::isError($seek)) {
+                return $seek;
+            }
+        }
+        if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
+            $fetchmode = $this->db->fetchmode;
+        }
+        if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
+            $row = @mysql_fetch_assoc($this->result);
+            if (is_array($row)
+                && $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
+            ) {
+                $row = array_change_key_case($row, $this->db->options['field_case']);
+            }
+        } else {
+           $row = @mysql_fetch_row($this->result);
+        }
+
+        if (!$row) {
+            if ($this->result === false) {
+                $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+                return $err;
+            }
+            $null = null;
+            return $null;
+        }
+        $mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;
+        $rtrim = false;
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {
+            if (empty($this->types)) {
+                $mode += MDB2_PORTABILITY_RTRIM;
+            } else {
+                $rtrim = true;
+            }
+        }
+        if ($mode) {
+            $this->db->_fixResultArrayValues($row, $mode);
+        }
+        if (!empty($this->types)) {
+            $row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);
+        }
+        if (!empty($this->values)) {
+            $this->_assignBindColumns($row);
+        }
+        if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
+            $object_class = $this->db->options['fetch_class'];
+            if ($object_class == 'stdClass') {
+                $row = (object) $row;
+            } else {
+                $row = &new $object_class($row);
+            }
+        }
+        ++$this->rownum;
+        return $row;
+    }
+
+    // }}}
+    // {{{ _getColumnNames()
+
+    /**
+     * Retrieve the names of columns returned by the DBMS in a query result.
+     *
+     * @return  mixed   Array variable that holds the names of columns as keys
+     *                  or an MDB2 error on failure.
+     *                  Some DBMS may not return any columns when the result set
+     *                  does not contain any rows.
+     * @access private
+     */
+    function _getColumnNames()
+    {
+        $columns = array();
+        $numcols = $this->numCols();
+        if (PEAR::isError($numcols)) {
+            return $numcols;
+        }
+        for ($column = 0; $column < $numcols; $column++) {
+            $column_name = @mysql_field_name($this->result, $column);
+            $columns[$column_name] = $column;
+        }
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $columns = array_change_key_case($columns, $this->db->options['field_case']);
+        }
+        return $columns;
+    }
+
+    // }}}
+    // {{{ numCols()
+
+    /**
+     * Count the number of columns returned by the DBMS in a query result.
+     *
+     * @return mixed integer value with the number of columns, a MDB2 error
+     *                       on failure
+     * @access public
+     */
+    function numCols()
+    {
+        $cols = @mysql_num_fields($this->result);
+        if (is_null($cols)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return count($this->types);
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get column count', __FUNCTION__);
+        }
+        return $cols;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Free the internal resources associated with result.
+     *
+     * @return boolean true on success, false if result is invalid
+     * @access public
+     */
+    function free()
+    {
+        if (is_resource($this->result) && $this->db->connection) {
+            $free = @mysql_free_result($this->result);
+            if ($free === false) {
+                return $this->db->raiseError(null, null, null,
+                    'Could not free result', __FUNCTION__);
+            }
+        }
+        $this->result = false;
+        return MDB2_OK;
+    }
+}
+
+/**
+ * MDB2 MySQL buffered result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_BufferedResult_mysql extends MDB2_Result_mysql
+{
+    // }}}
+    // {{{ seek()
+
+    /**
+     * Seek to a specific row in a result set
+     *
+     * @param int    $rownum    number of the row where the data can be found
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function seek($rownum = 0)
+    {
+        if ($this->rownum != ($rownum - 1) && !@mysql_data_seek($this->result, $rownum)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return MDB2_OK;
+            }
+            return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
+                'tried to seek to an invalid row number ('.$rownum.')', __FUNCTION__);
+        }
+        $this->rownum = $rownum - 1;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ valid()
+
+    /**
+     * Check if the end of the result set has been reached
+     *
+     * @return mixed true or false on sucess, a MDB2 error on failure
+     * @access public
+     */
+    function valid()
+    {
+        $numrows = $this->numRows();
+        if (PEAR::isError($numrows)) {
+            return $numrows;
+        }
+        return $this->rownum < ($numrows - 1);
+    }
+
+    // }}}
+    // {{{ numRows()
+
+    /**
+     * Returns the number of rows in a result object
+     *
+     * @return mixed MDB2 Error Object or the number of rows
+     * @access public
+     */
+    function numRows()
+    {
+        $rows = @mysql_num_rows($this->result);
+        if (false === $rows) {
+            if (false === $this->result) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return 0;
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get row count', __FUNCTION__);
+        }
+        return $rows;
+    }
+}
+
+/**
+ * MDB2 MySQL statement driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Statement_mysql extends MDB2_Statement_Common
+{
+    // {{{ _execute()
+
+    /**
+     * Execute a prepared query statement helper method.
+     *
+     * @param mixed $result_class string which specifies which result class to use
+     * @param mixed $result_wrap_class string which specifies which class to wrap results in
+     *
+     * @return mixed MDB2_Result or integer (affected rows) on success,
+     *               a MDB2 error on failure
+     * @access private
+     */
+    function &_execute($result_class = true, $result_wrap_class = false)
+    {
+        if (is_null($this->statement)) {
+            $result =& parent::_execute($result_class, $result_wrap_class);
+            return $result;
+        }
+        $this->db->last_query = $this->query;
+        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'pre', 'parameters' => $this->values));
+        if ($this->db->getOption('disable_query')) {
+            $result = $this->is_manip ? 0 : null;
+            return $result;
+        }
+
+        $connection = $this->db->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $query = 'EXECUTE '.$this->statement;
+        if (!empty($this->positions)) {
+            $parameters = array();
+            foreach ($this->positions as $parameter) {
+                if (!array_key_exists($parameter, $this->values)) {
+                    return $this->db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                        'Unable to bind to missing placeholder: '.$parameter, __FUNCTION__);
+                }
+                $value = $this->values[$parameter];
+                $type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
+                if (is_resource($value) || $type == 'clob' || $type == 'blob' && $this->db->options['lob_allow_url_include']) {
+                    if (!is_resource($value) && preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {
+                        if ($match[1] == 'file://') {
+                            $value = $match[2];
+                        }
+                        $value = @fopen($value, 'r');
+                        $close = true;
+                    }
+                    if (is_resource($value)) {
+                        $data = '';
+                        while (!@feof($value)) {
+                            $data.= @fread($value, $this->db->options['lob_buffer_length']);
+                        }
+                        if ($close) {
+                            @fclose($value);
+                        }
+                        $value = $data;
+                    }
+                }
+                $quoted = $this->db->quote($value, $type);
+                if (PEAR::isError($quoted)) {
+                    return $quoted;
+                }
+                $param_query = 'SET @'.$parameter.' = '.$quoted;
+                $result = $this->db->_doQuery($param_query, true, $connection);
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+            }
+            $query.= ' USING @'.implode(', @', array_values($this->positions));
+        }
+
+        $result = $this->db->_doQuery($query, $this->is_manip, $connection);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+
+        if ($this->is_manip) {
+            $affected_rows = $this->db->_affectedRows($connection, $result);
+            return $affected_rows;
+        }
+
+        $result =& $this->db->_wrapResult($result, $this->result_types,
+            $result_class, $result_wrap_class, $this->limit, $this->offset);
+        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));
+        return $result;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Release resources allocated for the specified prepared query.
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function free()
+    {
+        if (is_null($this->positions)) {
+            return $this->db->raiseError(MDB2_ERROR, null, null,
+                'Prepared statement has already been freed', __FUNCTION__);
+        }
+        $result = MDB2_OK;
+
+        if (!is_null($this->statement)) {
+            $connection = $this->db->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+            $query = 'DEALLOCATE PREPARE '.$this->statement;
+            $result = $this->db->_doQuery($query, true, $connection);
+        }
+
+        parent::free();
+        return $result;
+    }
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/pgsql.php b/inc/MDB2/Driver/pgsql.php
new file mode 100755
index 00000000000..00a64865a72
--- /dev/null
+++ b/inc/MDB2/Driver/pgsql.php
@@ -0,0 +1,1519 @@
+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Paul Cooper <pgc@ucecom.com>                                 |
+// +----------------------------------------------------------------------+
+//
+// $Id: pgsql.php,v 1.203 2008/11/29 14:04:46 afz Exp $
+
+/**
+ * MDB2 PostGreSQL driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Driver_pgsql extends MDB2_Driver_Common
+{
+    // {{{ properties
+    var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => "'", 'escape_pattern' => '\\');
+
+    var $identifier_quoting = array('start' => '"', 'end' => '"', 'escape' => '"');
+    // }}}
+    // {{{ constructor
+
+    /**
+     * Constructor
+     */
+    function __construct()
+    {
+        parent::__construct();
+
+        $this->phptype = 'pgsql';
+        $this->dbsyntax = 'pgsql';
+
+        $this->supported['sequences'] = true;
+        $this->supported['indexes'] = true;
+        $this->supported['affected_rows'] = true;
+        $this->supported['summary_functions'] = true;
+        $this->supported['order_by_text'] = true;
+        $this->supported['transactions'] = true;
+        $this->supported['savepoints'] = true;
+        $this->supported['current_id'] = true;
+        $this->supported['limit_queries'] = true;
+        $this->supported['LOBs'] = true;
+        $this->supported['replace'] = 'emulated';
+        $this->supported['sub_selects'] = true;
+        $this->supported['triggers'] = true;
+        $this->supported['auto_increment'] = 'emulated';
+        $this->supported['primary_key'] = true;
+        $this->supported['result_introspection'] = true;
+        $this->supported['prepared_statements'] = true;
+        $this->supported['identifier_quoting'] = true;
+        $this->supported['pattern_escaping'] = true;
+        $this->supported['new_link'] = true;
+
+        $this->options['DBA_username'] = false;
+        $this->options['DBA_password'] = false;
+        $this->options['multi_query'] = false;
+        $this->options['disable_smart_seqname'] = true;
+        $this->options['max_identifiers_length'] = 63;
+    }
+
+    // }}}
+    // {{{ errorInfo()
+
+    /**
+     * This method is used to collect information about an error
+     *
+     * @param integer $error
+     * @return array
+     * @access public
+     */
+    function errorInfo($error = null)
+    {
+        // Fall back to MDB2_ERROR if there was no mapping.
+        $error_code = MDB2_ERROR;
+
+        $native_msg = '';
+        if (is_resource($error)) {
+            $native_msg = @pg_result_error($error);
+        } elseif ($this->connection) {
+            $native_msg = @pg_last_error($this->connection);
+            if (!$native_msg && @pg_connection_status($this->connection) === PGSQL_CONNECTION_BAD) {
+                $native_msg = 'Database connection has been lost.';
+                $error_code = MDB2_ERROR_CONNECT_FAILED;
+            }
+        } else {
+            $native_msg = @pg_last_error();
+        }
+
+        static $error_regexps;
+        if (empty($error_regexps)) {
+            $error_regexps = array(
+                '/column .* (of relation .*)?does not exist/i'
+                    => MDB2_ERROR_NOSUCHFIELD,
+                '/(relation|sequence|table).*does not exist|class .* not found/i'
+                    => MDB2_ERROR_NOSUCHTABLE,
+                '/database .* does not exist/'
+                    => MDB2_ERROR_NOT_FOUND,
+                '/constraint .* does not exist/'
+                    => MDB2_ERROR_NOT_FOUND,
+                '/index .* does not exist/'
+                    => MDB2_ERROR_NOT_FOUND,
+                '/database .* already exists/i'
+                    => MDB2_ERROR_ALREADY_EXISTS,
+                '/relation .* already exists/i'
+                    => MDB2_ERROR_ALREADY_EXISTS,
+                '/(divide|division) by zero$/i'
+                    => MDB2_ERROR_DIVZERO,
+                '/pg_atoi: error in .*: can\'t parse /i'
+                    => MDB2_ERROR_INVALID_NUMBER,
+                '/invalid input syntax for( type)? (integer|numeric)/i'
+                    => MDB2_ERROR_INVALID_NUMBER,
+                '/value .* is out of range for type \w*int/i'
+                    => MDB2_ERROR_INVALID_NUMBER,
+                '/integer out of range/i'
+                    => MDB2_ERROR_INVALID_NUMBER,
+                '/value too long for type character/i'
+                    => MDB2_ERROR_INVALID,
+                '/attribute .* not found|relation .* does not have attribute/i'
+                    => MDB2_ERROR_NOSUCHFIELD,
+                '/column .* specified in USING clause does not exist in (left|right) table/i'
+                    => MDB2_ERROR_NOSUCHFIELD,
+                '/parser: parse error at or near/i'
+                    => MDB2_ERROR_SYNTAX,
+                '/syntax error at/'
+                    => MDB2_ERROR_SYNTAX,
+                '/column reference .* is ambiguous/i'
+                    => MDB2_ERROR_SYNTAX,
+                '/permission denied/'
+                    => MDB2_ERROR_ACCESS_VIOLATION,
+                '/violates not-null constraint/'
+                    => MDB2_ERROR_CONSTRAINT_NOT_NULL,
+                '/violates [\w ]+ constraint/'
+                    => MDB2_ERROR_CONSTRAINT,
+                '/referential integrity violation/'
+                    => MDB2_ERROR_CONSTRAINT,
+                '/more expressions than target columns/i'
+                    => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+            );
+        }
+        if (is_numeric($error) && $error < 0) {
+            $error_code = $error;
+        } else {
+            foreach ($error_regexps as $regexp => $code) {
+                if (preg_match($regexp, $native_msg)) {
+                    $error_code = $code;
+                    break;
+                }
+            }
+        }
+        return array($error_code, null, $native_msg);
+    }
+
+    // }}}
+    // {{{ escape()
+
+    /**
+     * Quotes a string so it can be safely used in a query. It will quote
+     * the text so it can safely be used within a query.
+     *
+     * @param   string  the input string to quote
+     * @param   bool    escape wildcards
+     *
+     * @return  string  quoted string
+     *
+     * @access  public
+     */
+    function escape($text, $escape_wildcards = false)
+    {
+        if ($escape_wildcards) {
+            $text = $this->escapePattern($text);
+        }
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        if (is_resource($connection) && version_compare(PHP_VERSION, '5.2.0RC5', '>=')) {
+            $text = @pg_escape_string($connection, $text);
+        } else {
+            $text = @pg_escape_string($text);
+        }
+        return $text;
+    }
+
+    // }}}
+    // {{{ beginTransaction()
+
+    /**
+     * Start a transaction or set a savepoint.
+     *
+     * @param   string  name of a savepoint to set
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function beginTransaction($savepoint = null)
+    {
+        $this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!is_null($savepoint)) {
+            if (!$this->in_transaction) {
+                return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                    'savepoint cannot be released when changes are auto committed', __FUNCTION__);
+            }
+            $query = 'SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        } elseif ($this->in_transaction) {
+            return MDB2_OK;  //nothing to do
+        }
+        if (!$this->destructor_registered && $this->opened_persistent) {
+            $this->destructor_registered = true;
+            register_shutdown_function('MDB2_closeOpenTransactions');
+        }
+        $result =& $this->_doQuery('BEGIN', true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = true;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ commit()
+
+    /**
+     * Commit the database changes done during a transaction that is in
+     * progress or release a savepoint. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after committing the pending changes.
+     *
+     * @param   string  name of a savepoint to release
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function commit($savepoint = null)
+    {
+        $this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (!is_null($savepoint)) {
+            $query = 'RELEASE SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        }
+
+        $result =& $this->_doQuery('COMMIT', true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ rollback()
+
+    /**
+     * Cancel any database changes done during a transaction or since a specific
+     * savepoint that is in progress. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after canceling the pending changes.
+     *
+     * @param   string  name of a savepoint to rollback to
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function rollback($savepoint = null)
+    {
+        $this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'rollback cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (!is_null($savepoint)) {
+            $query = 'ROLLBACK TO SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        }
+
+        $query = 'ROLLBACK';
+        $result =& $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ function setTransactionIsolation()
+
+    /**
+     * Set the transacton isolation level.
+     *
+     * @param   string  standard isolation level
+     *                  READ UNCOMMITTED (allows dirty reads)
+     *                  READ COMMITTED (prevents dirty reads)
+     *                  REPEATABLE READ (prevents nonrepeatable reads)
+     *                  SERIALIZABLE (prevents phantom reads)
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     * @since   2.1.1
+     */
+    function setTransactionIsolation($isolation)
+    {
+        $this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
+        switch ($isolation) {
+        case 'READ UNCOMMITTED':
+        case 'READ COMMITTED':
+        case 'REPEATABLE READ':
+        case 'SERIALIZABLE':
+            break;
+        default:
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'isolation level is not supported: '.$isolation, __FUNCTION__);
+        }
+
+        $query = "SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL $isolation";
+        return $this->_doQuery($query, true);
+    }
+
+    // }}}
+    // {{{ _doConnect()
+
+    /**
+     * Do the grunt work of connecting to the database
+     *
+     * @return mixed connection resource on success, MDB2 Error Object on failure
+     * @access protected
+     */
+    function _doConnect($username, $password, $database_name, $persistent = false)
+    {
+        if (!PEAR::loadExtension($this->phptype)) {
+            return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
+        }
+        
+        if ($database_name == '') {
+            $database_name = 'template1';
+        }
+
+        $protocol = $this->dsn['protocol'] ? $this->dsn['protocol'] : 'tcp';
+
+        $params = array('');
+        if ($protocol == 'tcp') {
+            if ($this->dsn['hostspec']) {
+                $params[0].= 'host=' . $this->dsn['hostspec'];
+            }
+            if ($this->dsn['port']) {
+                $params[0].= ' port=' . $this->dsn['port'];
+            }
+        } elseif ($protocol == 'unix') {
+            // Allow for pg socket in non-standard locations.
+            if ($this->dsn['socket']) {
+                $params[0].= 'host=' . $this->dsn['socket'];
+            }
+            if ($this->dsn['port']) {
+                $params[0].= ' port=' . $this->dsn['port'];
+            }
+        }
+        if ($database_name) {
+            $params[0].= ' dbname=\'' . addslashes($database_name) . '\'';
+        }
+        if ($username) {
+            $params[0].= ' user=\'' . addslashes($username) . '\'';
+        }
+        if ($password) {
+            $params[0].= ' password=\'' . addslashes($password) . '\'';
+        }
+        if (!empty($this->dsn['options'])) {
+            $params[0].= ' options=' . $this->dsn['options'];
+        }
+        if (!empty($this->dsn['tty'])) {
+            $params[0].= ' tty=' . $this->dsn['tty'];
+        }
+        if (!empty($this->dsn['connect_timeout'])) {
+            $params[0].= ' connect_timeout=' . $this->dsn['connect_timeout'];
+        }
+        if (!empty($this->dsn['sslmode'])) {
+            $params[0].= ' sslmode=' . $this->dsn['sslmode'];
+        }
+        if (!empty($this->dsn['service'])) {
+            $params[0].= ' service=' . $this->dsn['service'];
+        }
+
+        if ($this->_isNewLinkSet()) {
+            if (version_compare(phpversion(), '4.3.0', '>=')) {
+                $params[] = PGSQL_CONNECT_FORCE_NEW;
+            }
+        }
+
+        $connect_function = $persistent ? 'pg_pconnect' : 'pg_connect';
+        $connection = @call_user_func_array($connect_function, $params);
+        if (!$connection) {
+            return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+                'unable to establish a connection', __FUNCTION__);
+        }
+
+       if (empty($this->dsn['disable_iso_date'])) {
+            if (!@pg_query($connection, "SET SESSION DATESTYLE = 'ISO'")) {
+                return $this->raiseError(null, null, null,
+                    'Unable to set date style to iso', __FUNCTION__);
+            }
+       }
+
+        if (!empty($this->dsn['charset'])) {
+            $result = $this->setCharset($this->dsn['charset'], $connection);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+
+        return $connection;
+    }
+
+    // }}}
+    // {{{ connect()
+
+    /**
+     * Connect to the database
+     *
+     * @return true on success, MDB2 Error Object on failure
+     * @access public
+     */
+    function connect()
+    {
+        if (is_resource($this->connection)) {
+            //if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
+            if (MDB2::areEquals($this->connected_dsn, $this->dsn)
+                && $this->connected_database_name == $this->database_name
+                && ($this->opened_persistent == $this->options['persistent'])
+            ) {
+                return MDB2_OK;
+            }
+            $this->disconnect(false);
+        }
+
+        if ($this->database_name) {
+            $connection = $this->_doConnect($this->dsn['username'],
+                                            $this->dsn['password'],
+                                            $this->database_name,
+                                            $this->options['persistent']);
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+
+            $this->connection = $connection;
+            $this->connected_dsn = $this->dsn;
+            $this->connected_database_name = $this->database_name;
+            $this->opened_persistent = $this->options['persistent'];
+            $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
+        }
+
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ setCharset()
+
+    /**
+     * Set the charset on the current connection
+     *
+     * @param string    charset
+     * @param resource  connection handle
+     *
+     * @return true on success, MDB2 Error Object on failure
+     */
+    function setCharset($charset, $connection = null)
+    {
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        if (is_array($charset)) {
+            $charset   = array_shift($charset);
+            $this->warnings[] = 'postgresql does not support setting client collation';
+        }
+        $result = @pg_set_client_encoding($connection, $charset);
+        if ($result == -1) {
+            return $this->raiseError(null, null, null,
+                'Unable to set client charset: '.$charset, __FUNCTION__);
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ databaseExists()
+
+    /**
+     * check if given database name is exists?
+     *
+     * @param string $name    name of the database that should be checked
+     *
+     * @return mixed true/false on success, a MDB2 error on failure
+     * @access public
+     */
+    function databaseExists($name)
+    {
+        $res = $this->_doConnect($this->dsn['username'],
+                                 $this->dsn['password'],
+                                 $this->escape($name),
+                                 $this->options['persistent']);
+        if (!PEAR::isError($res)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    // }}}
+    // {{{ disconnect()
+
+    /**
+     * Log out and disconnect from the database.
+     *
+     * @param  boolean $force if the disconnect should be forced even if the
+     *                        connection is opened persistently
+     * @return mixed true on success, false if not connected and error
+     *                object on error
+     * @access public
+     */
+    function disconnect($force = true)
+    {
+        if (is_resource($this->connection)) {
+            if ($this->in_transaction) {
+                $dsn = $this->dsn;
+                $database_name = $this->database_name;
+                $persistent = $this->options['persistent'];
+                $this->dsn = $this->connected_dsn;
+                $this->database_name = $this->connected_database_name;
+                $this->options['persistent'] = $this->opened_persistent;
+                $this->rollback();
+                $this->dsn = $dsn;
+                $this->database_name = $database_name;
+                $this->options['persistent'] = $persistent;
+            }
+
+            if (!$this->opened_persistent || $force) {
+                $ok = @pg_close($this->connection);
+                if (!$ok) {
+                    return $this->raiseError(MDB2_ERROR_DISCONNECT_FAILED,
+                           null, null, null, __FUNCTION__);
+                }
+            }
+        } else {
+            return false;
+        }
+        return parent::disconnect($force);
+    }
+
+    // }}}
+    // {{{ standaloneQuery()
+
+   /**
+     * execute a query as DBA
+     *
+     * @param string $query the SQL query
+     * @param mixed   $types  array that contains the types of the columns in
+     *                        the result set
+     * @param boolean $is_manip  if the query is a manipulation query
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function &standaloneQuery($query, $types = null, $is_manip = false)
+    {
+        $user = $this->options['DBA_username']? $this->options['DBA_username'] : $this->dsn['username'];
+        $pass = $this->options['DBA_password']? $this->options['DBA_password'] : $this->dsn['password'];
+        $connection = $this->_doConnect($user, $pass, $this->database_name, $this->options['persistent']);
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $offset = $this->offset;
+        $limit = $this->limit;
+        $this->offset = $this->limit = 0;
+        $query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
+
+        $result =& $this->_doQuery($query, $is_manip, $connection, $this->database_name);
+        if (!PEAR::isError($result)) {
+            if ($is_manip) {
+                $result =  $this->_affectedRows($connection, $result);
+            } else {
+                $result =& $this->_wrapResult($result, $types, true, false, $limit, $offset);
+            }
+        }
+
+        @pg_close($connection);
+        return $result;
+    }
+
+    // }}}
+    // {{{ _doQuery()
+
+    /**
+     * Execute a query
+     * @param string $query  query
+     * @param boolean $is_manip  if the query is a manipulation query
+     * @param resource $connection
+     * @param string $database_name
+     * @return result or error object
+     * @access protected
+     */
+    function &_doQuery($query, $is_manip = false, $connection = null, $database_name = null)
+    {
+        $this->last_query = $query;
+        $result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
+        if ($result) {
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            $query = $result;
+        }
+        if ($this->options['disable_query']) {
+            $result = $is_manip ? 0 : null;
+            return $result;
+        }
+
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+
+        $function = $this->options['multi_query'] ? 'pg_send_query' : 'pg_query';
+        $result = @$function($connection, $query);
+        if (!$result) {
+            $err =& $this->raiseError(null, null, null,
+                'Could not execute statement', __FUNCTION__);
+            return $err;
+        } elseif ($this->options['multi_query']) {
+            if (!($result = @pg_get_result($connection))) {
+                $err =& $this->raiseError(null, null, null,
+                        'Could not get the first result from a multi query', __FUNCTION__);
+                return $err;
+            }
+        }
+
+        $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
+        return $result;
+    }
+
+    // }}}
+    // {{{ _affectedRows()
+
+    /**
+     * Returns the number of rows affected
+     *
+     * @param resource $result
+     * @param resource $connection
+     * @return mixed MDB2 Error Object or the number of rows affected
+     * @access private
+     */
+    function _affectedRows($connection, $result = null)
+    {
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        return @pg_affected_rows($result);
+    }
+
+    // }}}
+    // {{{ _modifyQuery()
+
+    /**
+     * Changes a query string for various DBMS specific reasons
+     *
+     * @param string $query  query to modify
+     * @param boolean $is_manip  if it is a DML query
+     * @param integer $limit  limit the number of rows
+     * @param integer $offset  start reading from given offset
+     * @return string modified query
+     * @access protected
+     */
+    function _modifyQuery($query, $is_manip, $limit, $offset)
+    {
+        if ($limit > 0
+            && !preg_match('/LIMIT\s*\d(?:\s*(?:,|OFFSET)\s*\d+)?(?:[^\)]*)?$/i', $query)
+        ) {
+            $query = rtrim($query);
+            if (substr($query, -1) == ';') {
+                $query = substr($query, 0, -1);
+            }
+            if ($is_manip) {
+                $query = $this->_modifyManipQuery($query, $limit);
+            } else {
+                $query.= " LIMIT $limit OFFSET $offset";
+            }
+        }
+        return $query;
+    }
+    
+    // }}}
+    // {{{ _modifyManipQuery()
+    
+    /**
+     * Changes a manip query string for various DBMS specific reasons
+     *
+     * @param string $query  query to modify
+     * @param integer $limit  limit the number of rows
+     * @return string modified query
+     * @access protected
+     */
+    function _modifyManipQuery($query, $limit)
+    {
+        $pos = strpos(strtolower($query), 'where');
+        $where = $pos ? substr($query, $pos) : '';
+
+        $manip_clause = '(\bDELETE\b\s+(?:\*\s+)?\bFROM\b|\bUPDATE\b)';
+        $from_clause  = '([\w\.]+)';
+        $where_clause = '(?:(.*)\bWHERE\b\s+(.*))|(.*)';
+        $pattern = '/^'. $manip_clause . '\s+' . $from_clause .'(?:\s)*(?:'. $where_clause .')?$/i';
+        $matches = preg_match($pattern, $query, $match);
+        if ($matches) {
+            $manip = $match[1];
+            $from  = $match[2];
+            $what  = (count($matches) == 6) ? $match[5] : $match[3];
+            return $manip.' '.$from.' '.$what.' WHERE ctid=(SELECT ctid FROM '.$from.' '.$where.' LIMIT '.$limit.')';
+        }
+        //return error?
+        return $query;
+    }
+
+    // }}}
+    // {{{ getServerVersion()
+
+    /**
+     * return version information about the server
+     *
+     * @param bool   $native  determines if the raw version string should be returned
+     * @return mixed array/string with version information or MDB2 error object
+     * @access public
+     */
+    function getServerVersion($native = false)
+    {
+        $query = 'SHOW SERVER_VERSION';
+        if ($this->connected_server_info) {
+            $server_info = $this->connected_server_info;
+        } else {
+            $server_info = $this->queryOne($query, 'text');
+            if (PEAR::isError($server_info)) {
+                return $server_info;
+            }
+        }
+        // cache server_info
+        $this->connected_server_info = $server_info;
+        if (!$native && !PEAR::isError($server_info)) {
+            $tmp = explode('.', $server_info, 3);
+            if (empty($tmp[2])
+                && isset($tmp[1])
+                && preg_match('/(\d+)(.*)/', $tmp[1], $tmp2)
+            ) {
+                $server_info = array(
+                    'major' => $tmp[0],
+                    'minor' => $tmp2[1],
+                    'patch' => null,
+                    'extra' => $tmp2[2],
+                    'native' => $server_info,
+                );
+            } else {
+                $server_info = array(
+                    'major' => isset($tmp[0]) ? $tmp[0] : null,
+                    'minor' => isset($tmp[1]) ? $tmp[1] : null,
+                    'patch' => isset($tmp[2]) ? $tmp[2] : null,
+                    'extra' => null,
+                    'native' => $server_info,
+                );
+            }
+        }
+        return $server_info;
+    }
+
+    // }}}
+    // {{{ prepare()
+
+    /**
+     * Prepares a query for multiple execution with execute().
+     * With some database backends, this is emulated.
+     * prepare() requires a generic query as string like
+     * 'INSERT INTO numbers VALUES(?,?)' or
+     * 'INSERT INTO numbers VALUES(:foo,:bar)'.
+     * The ? and :name and are placeholders which can be set using
+     * bindParam() and the query can be sent off using the execute() method.
+     * The allowed format for :name can be set with the 'bindname_format' option.
+     *
+     * @param string $query the query to prepare
+     * @param mixed   $types  array that contains the types of the placeholders
+     * @param mixed   $result_types  array that contains the types of the columns in
+     *                        the result set or MDB2_PREPARE_RESULT, if set to
+     *                        MDB2_PREPARE_MANIP the query is handled as a manipulation query
+     * @param mixed   $lobs   key (field) value (parameter) pair for all lob placeholders
+     * @return mixed resource handle for the prepared query on success, a MDB2
+     *        error on failure
+     * @access public
+     * @see bindParam, execute
+     */
+    function &prepare($query, $types = null, $result_types = null, $lobs = array())
+    {
+        if ($this->options['emulate_prepared']) {
+            $obj =& parent::prepare($query, $types, $result_types, $lobs);
+            return $obj;
+        }
+        $is_manip = ($result_types === MDB2_PREPARE_MANIP);
+        $offset = $this->offset;
+        $limit = $this->limit;
+        $this->offset = $this->limit = 0;
+        $result = $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'pre'));
+        if ($result) {
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            $query = $result;
+        }
+        $pgtypes = function_exists('pg_prepare') ? false : array();
+        if ($pgtypes !== false && !empty($types)) {
+            $this->loadModule('Datatype', null, true);
+        }
+        $query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
+        $placeholder_type_guess = $placeholder_type = null;
+        $question = '?';
+        $colon = ':';
+        $positions = array();
+        $position = $parameter = 0;
+        while ($position < strlen($query)) {
+            $q_position = strpos($query, $question, $position);
+            $c_position = strpos($query, $colon, $position);
+            //skip "::type" cast ("select id::varchar(20) from sometable where name=?")
+            $doublecolon_position = strpos($query, '::', $position);
+            if ($doublecolon_position !== false && $doublecolon_position == $c_position) {
+                $c_position = strpos($query, $colon, $position+2);
+            }
+            if ($q_position && $c_position) {
+                $p_position = min($q_position, $c_position);
+            } elseif ($q_position) {
+                $p_position = $q_position;
+            } elseif ($c_position) {
+                $p_position = $c_position;
+            } else {
+                break;
+            }
+            if (is_null($placeholder_type)) {
+                $placeholder_type_guess = $query[$p_position];
+            }
+            
+            $new_pos = $this->_skipDelimitedStrings($query, $position, $p_position);
+            if (PEAR::isError($new_pos)) {
+                return $new_pos;
+            }
+            if ($new_pos != $position) {
+                $position = $new_pos;
+                continue; //evaluate again starting from the new position
+            }
+
+            if ($query[$position] == $placeholder_type_guess) {
+                if (is_null($placeholder_type)) {
+                    $placeholder_type = $query[$p_position];
+                    $question = $colon = $placeholder_type;
+                    if (!empty($types) && is_array($types)) {
+                        if ($placeholder_type == ':') {
+                        } else {
+                            $types = array_values($types);
+                        }
+                    }
+                }
+                if ($placeholder_type_guess == '?') {
+                    $length = 1;
+                    $name = $parameter;
+                } else {
+                    $regexp = '/^.{'.($position+1).'}('.$this->options['bindname_format'].').*$/s';
+                    $param = preg_replace($regexp, '\\1', $query);
+                    if ($param === '') {
+                        $err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+                            'named parameter name must match "bindname_format" option', __FUNCTION__);
+                        return $err;
+                    }
+                    $length = strlen($param) + 1;
+                    $name = $param;
+                }
+                if ($pgtypes !== false) {
+                    if (is_array($types) && array_key_exists($name, $types)) {
+                        $pgtypes[] = $this->datatype->mapPrepareDatatype($types[$name]);
+                    } elseif (is_array($types) && array_key_exists($parameter, $types)) {
+                        $pgtypes[] = $this->datatype->mapPrepareDatatype($types[$parameter]);
+                    } else {
+                        $pgtypes[] = 'text';
+                    }
+                }
+                if (($key_parameter = array_search($name, $positions))) {
+                    $next_parameter = 1;
+                    foreach ($positions as $key => $value) {
+                        if ($key_parameter == $key) {
+                            break;
+                        }
+                        ++$next_parameter;
+                    }
+                } else {
+                    ++$parameter;
+                    $next_parameter = $parameter;
+                    $positions[] = $name;
+                }
+                $query = substr_replace($query, '$'.$parameter, $position, $length);
+                $position = $p_position + strlen($parameter);
+            } else {
+                $position = $p_position;
+            }
+        }
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        static $prep_statement_counter = 1;
+        $statement_name = sprintf($this->options['statement_format'], $this->phptype, $prep_statement_counter++ . sha1(microtime() + mt_rand()));
+        $statement_name = substr(strtolower($statement_name), 0, $this->options['max_identifiers_length']);
+        if ($pgtypes === false) {
+            $result = @pg_prepare($connection, $statement_name, $query);
+            if (!$result) {
+                $err =& $this->raiseError(null, null, null,
+                    'Unable to create prepared statement handle', __FUNCTION__);
+                return $err;
+            }
+        } else {
+            $types_string = '';
+            if ($pgtypes) {
+                $types_string = ' ('.implode(', ', $pgtypes).') ';
+            }
+            $query = 'PREPARE '.$statement_name.$types_string.' AS '.$query;
+            $statement =& $this->_doQuery($query, true, $connection);
+            if (PEAR::isError($statement)) {
+                return $statement;
+            }
+        }
+
+        $class_name = 'MDB2_Statement_'.$this->phptype;
+        $obj = new $class_name($this, $statement_name, $positions, $query, $types, $result_types, $is_manip, $limit, $offset);
+        $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'post', 'result' => $obj));
+        return $obj;
+    }
+
+    // }}}
+    // {{{ function getSequenceName($sqn)
+
+    /**
+     * adds sequence name formatting to a sequence name
+     *
+     * @param   string  name of the sequence
+     *
+     * @return  string  formatted sequence name
+     *
+     * @access  public
+     */
+    function getSequenceName($sqn)
+    {
+        if (false === $this->options['disable_smart_seqname']) {
+            if (strpos($sqn, '_') !== false) {
+                list($table, $field) = explode('_', $sqn, 2);
+            }
+            $schema_list = $this->queryOne("SELECT array_to_string(current_schemas(false), ',')");
+            if (PEAR::isError($schema_list) || empty($schema_list) || count($schema_list) < 2) {
+                $order_by = ' a.attnum';
+                $schema_clause = ' AND n.nspname=current_schema()';
+            } else {
+                $schemas = explode(',', $schema_list);
+                $schema_clause = ' AND n.nspname IN ('.$schema_list.')';
+                $counter = 1;
+                $order_by = ' CASE ';
+                foreach ($schemas as $schema) {
+                    $order_by .= ' WHEN n.nspname='.$schema.' THEN '.$counter++;
+                }
+                $order_by .= ' ELSE '.$counter.' END, a.attnum';
+            }
+
+            $query = "SELECT substring((SELECT substring(pg_get_expr(d.adbin, d.adrelid) for 128)
+                    	    FROM pg_attrdef d
+                    	   WHERE d.adrelid = a.attrelid
+                    	     AND d.adnum = a.attnum
+                    	     AND a.atthasdef
+                    	 ) FROM 'nextval[^'']*''([^'']*)')
+                        FROM pg_attribute a
+                    LEFT JOIN pg_class c ON c.oid = a.attrelid
+                    LEFT JOIN pg_attrdef d ON d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef
+                    LEFT JOIN pg_namespace n ON c.relnamespace = n.oid
+                       WHERE (c.relname = ".$this->quote($sqn, 'text');
+            if (!empty($field)) {
+                $query .= " OR (c.relname = ".$this->quote($table, 'text')." AND a.attname = ".$this->quote($field, 'text').")";
+            }
+            $query .= "      )"
+                         .$schema_clause."
+                         AND NOT a.attisdropped
+                         AND a.attnum > 0
+                         AND pg_get_expr(d.adbin, d.adrelid) LIKE 'nextval%'
+                    ORDER BY ".$order_by;
+            $seqname = $this->queryOne($query);
+            if (!PEAR::isError($seqname) && !empty($seqname) && is_string($seqname)) {
+                return $seqname;
+            }
+        }
+
+        return parent::getSequenceName($sqn);
+    }
+
+    // }}}
+    // {{{ nextID()
+
+    /**
+     * Returns the next free id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @param boolean $ondemand when true the sequence is
+     *                          automatic created, if it
+     *                          not exists
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function nextID($seq_name, $ondemand = true)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        $query = "SELECT NEXTVAL('$sequence_name')";
+        $this->pushErrorHandling(PEAR_ERROR_RETURN);
+        $this->expectError(MDB2_ERROR_NOSUCHTABLE);
+        $result = $this->queryOne($query, 'integer');
+        $this->popExpect();
+        $this->popErrorHandling();
+        if (PEAR::isError($result)) {
+            if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
+                $this->loadModule('Manager', null, true);
+                $result = $this->manager->createSequence($seq_name);
+                if (PEAR::isError($result)) {
+                    return $this->raiseError($result, null, null,
+                        'on demand sequence could not be created', __FUNCTION__);
+                }
+                return $this->nextId($seq_name, false);
+            }
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ lastInsertID()
+
+    /**
+     * Returns the autoincrement ID if supported or $id or fetches the current
+     * ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
+     *
+     * @param string $table name of the table into which a new row was inserted
+     * @param string $field name of the field into which a new row was inserted
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function lastInsertID($table = null, $field = null)
+    {
+        if (empty($table) && empty($field)) {
+            return $this->queryOne('SELECT lastval()', 'integer');
+        }
+        $seq = $table.(empty($field) ? '' : '_'.$field);
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq), true);
+        return $this->queryOne("SELECT currval('$sequence_name')", 'integer');
+    }
+
+    // }}}
+    // {{{ currID()
+
+    /**
+     * Returns the current id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function currID($seq_name)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        return $this->queryOne("SELECT last_value FROM $sequence_name", 'integer');
+    }
+}
+
+/**
+ * MDB2 PostGreSQL result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Result_pgsql extends MDB2_Result_Common
+{
+    // }}}
+    // {{{ fetchRow()
+
+    /**
+     * Fetch a row and insert the data into an existing array.
+     *
+     * @param int       $fetchmode  how the array data should be indexed
+     * @param int    $rownum    number of the row where the data can be found
+     * @return int data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
+    {
+        if (!is_null($rownum)) {
+            $seek = $this->seek($rownum);
+            if (PEAR::isError($seek)) {
+                return $seek;
+            }
+        }
+        if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
+            $fetchmode = $this->db->fetchmode;
+        }
+        if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
+            $row = @pg_fetch_array($this->result, null, PGSQL_ASSOC);
+            if (is_array($row)
+                && $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
+            ) {
+                $row = array_change_key_case($row, $this->db->options['field_case']);
+            }
+        } else {
+            $row = @pg_fetch_row($this->result);
+        }
+        if (!$row) {
+            if ($this->result === false) {
+                $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+                return $err;
+            }
+            $null = null;
+            return $null;
+        }
+        $mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;
+        $rtrim = false;
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {
+            if (empty($this->types)) {
+                $mode += MDB2_PORTABILITY_RTRIM;
+            } else {
+                $rtrim = true;
+            }
+        }
+        if ($mode) {
+            $this->db->_fixResultArrayValues($row, $mode);
+        }
+        if (!empty($this->types)) {
+            $row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);
+        }
+        if (!empty($this->values)) {
+            $this->_assignBindColumns($row);
+        }
+        if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
+            $object_class = $this->db->options['fetch_class'];
+            if ($object_class == 'stdClass') {
+                $row = (object) $row;
+            } else {
+                $row = &new $object_class($row);
+            }
+        }
+        ++$this->rownum;
+        return $row;
+    }
+
+    // }}}
+    // {{{ _getColumnNames()
+
+    /**
+     * Retrieve the names of columns returned by the DBMS in a query result.
+     *
+     * @return  mixed   Array variable that holds the names of columns as keys
+     *                  or an MDB2 error on failure.
+     *                  Some DBMS may not return any columns when the result set
+     *                  does not contain any rows.
+     * @access private
+     */
+    function _getColumnNames()
+    {
+        $columns = array();
+        $numcols = $this->numCols();
+        if (PEAR::isError($numcols)) {
+            return $numcols;
+        }
+        for ($column = 0; $column < $numcols; $column++) {
+            $column_name = @pg_field_name($this->result, $column);
+            $columns[$column_name] = $column;
+        }
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $columns = array_change_key_case($columns, $this->db->options['field_case']);
+        }
+        return $columns;
+    }
+
+    // }}}
+    // {{{ numCols()
+
+    /**
+     * Count the number of columns returned by the DBMS in a query result.
+     *
+     * @access public
+     * @return mixed integer value with the number of columns, a MDB2 error
+     *                       on failure
+     */
+    function numCols()
+    {
+        $cols = @pg_num_fields($this->result);
+        if (is_null($cols)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return count($this->types);
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get column count', __FUNCTION__);
+        }
+        return $cols;
+    }
+
+    // }}}
+    // {{{ nextResult()
+
+    /**
+     * Move the internal result pointer to the next available result
+     *
+     * @return true on success, false if there is no more result set or an error object on failure
+     * @access public
+     */
+    function nextResult()
+    {
+        $connection = $this->db->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        if (!($this->result = @pg_get_result($connection))) {
+            return false;
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Free the internal resources associated with result.
+     *
+     * @return boolean true on success, false if result is invalid
+     * @access public
+     */
+    function free()
+    {
+        if (is_resource($this->result) && $this->db->connection) {
+            $free = @pg_free_result($this->result);
+            if ($free === false) {
+                return $this->db->raiseError(null, null, null,
+                    'Could not free result', __FUNCTION__);
+            }
+        }
+        $this->result = false;
+        return MDB2_OK;
+    }
+}
+
+/**
+ * MDB2 PostGreSQL buffered result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_BufferedResult_pgsql extends MDB2_Result_pgsql
+{
+    // {{{ seek()
+
+    /**
+     * Seek to a specific row in a result set
+     *
+     * @param int    $rownum    number of the row where the data can be found
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function seek($rownum = 0)
+    {
+        if ($this->rownum != ($rownum - 1) && !@pg_result_seek($this->result, $rownum)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return MDB2_OK;
+            }
+            return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
+                'tried to seek to an invalid row number ('.$rownum.')', __FUNCTION__);
+        }
+        $this->rownum = $rownum - 1;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ valid()
+
+    /**
+     * Check if the end of the result set has been reached
+     *
+     * @return mixed true or false on sucess, a MDB2 error on failure
+     * @access public
+     */
+    function valid()
+    {
+        $numrows = $this->numRows();
+        if (PEAR::isError($numrows)) {
+            return $numrows;
+        }
+        return $this->rownum < ($numrows - 1);
+    }
+
+    // }}}
+    // {{{ numRows()
+
+    /**
+     * Returns the number of rows in a result object
+     *
+     * @return mixed MDB2 Error Object or the number of rows
+     * @access public
+     */
+    function numRows()
+    {
+        $rows = @pg_num_rows($this->result);
+        if (is_null($rows)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return 0;
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get row count', __FUNCTION__);
+        }
+        return $rows;
+    }
+}
+
+/**
+ * MDB2 PostGreSQL statement driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Statement_pgsql extends MDB2_Statement_Common
+{
+    // {{{ _execute()
+
+    /**
+     * Execute a prepared query statement helper method.
+     *
+     * @param mixed $result_class string which specifies which result class to use
+     * @param mixed $result_wrap_class string which specifies which class to wrap results in
+     *
+     * @return mixed MDB2_Result or integer (affected rows) on success,
+     *               a MDB2 error on failure
+     * @access private
+     */
+    function &_execute($result_class = true, $result_wrap_class = false)
+    {
+        if (is_null($this->statement)) {
+            $result =& parent::_execute($result_class, $result_wrap_class);
+            return $result;
+        }
+        $this->db->last_query = $this->query;
+        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'pre', 'parameters' => $this->values));
+        if ($this->db->getOption('disable_query')) {
+            $result = $this->is_manip ? 0 : null;
+            return $result;
+        }
+
+        $connection = $this->db->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $query = false;
+        $parameters = array();
+        // todo: disabled until pg_execute() bytea issues are cleared up
+        if (true || !function_exists('pg_execute')) {
+            $query = 'EXECUTE '.$this->statement;
+        }
+        if (!empty($this->positions)) {
+            foreach ($this->positions as $parameter) {
+                if (!array_key_exists($parameter, $this->values)) {
+                    return $this->db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                        'Unable to bind to missing placeholder: '.$parameter, __FUNCTION__);
+                }
+                $value = $this->values[$parameter];
+                $type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
+                if (is_resource($value) || $type == 'clob' || $type == 'blob' || $this->db->options['lob_allow_url_include']) {
+                    if (!is_resource($value) && preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {
+                        if ($match[1] == 'file://') {
+                            $value = $match[2];
+                        }
+                        $value = @fopen($value, 'r');
+                        $close = true;
+                    }
+                    if (is_resource($value)) {
+                        $data = '';
+                        while (!@feof($value)) {
+                            $data.= @fread($value, $this->db->options['lob_buffer_length']);
+                        }
+                        if ($close) {
+                            @fclose($value);
+                        }
+                        $value = $data;
+                    }
+                }
+                $quoted = $this->db->quote($value, $type, $query);
+                if (PEAR::isError($quoted)) {
+                    return $quoted;
+                }
+                $parameters[] = $quoted;
+            }
+            if ($query) {
+                $query.= ' ('.implode(', ', $parameters).')';
+            }
+        }
+
+        if (!$query) {
+            $result = @pg_execute($connection, $this->statement, $parameters);
+            if (!$result) {
+                $err =& $this->db->raiseError(null, null, null,
+                    'Unable to execute statement', __FUNCTION__);
+                return $err;
+            }
+        } else {
+            $result = $this->db->_doQuery($query, $this->is_manip, $connection);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+
+        if ($this->is_manip) {
+            $affected_rows = $this->db->_affectedRows($connection, $result);
+            return $affected_rows;
+        }
+
+        $result =& $this->db->_wrapResult($result, $this->result_types,
+            $result_class, $result_wrap_class, $this->limit, $this->offset);
+        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));
+        return $result;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Release resources allocated for the specified prepared query.
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function free()
+    {
+        if (is_null($this->positions)) {
+            return $this->db->raiseError(MDB2_ERROR, null, null,
+                'Prepared statement has already been freed', __FUNCTION__);
+        }
+        $result = MDB2_OK;
+
+        if (!is_null($this->statement)) {
+            $connection = $this->db->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+            $query = 'DEALLOCATE PREPARE '.$this->statement;
+            $result = $this->db->_doQuery($query, true, $connection);
+        }
+
+        parent::free();
+        return $result;
+    }
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Driver/sqlite.php b/inc/MDB2/Driver/sqlite.php
new file mode 100755
index 00000000000..63b66bf3fb9
--- /dev/null
+++ b/inc/MDB2/Driver/sqlite.php
@@ -0,0 +1,1082 @@
+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: sqlite.php,v 1.165 2008/11/30 14:28:01 afz Exp $
+//
+
+/**
+ * MDB2 SQLite driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_sqlite extends MDB2_Driver_Common
+{
+    // {{{ properties
+    var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => "'", 'escape_pattern' => false);
+
+    var $identifier_quoting = array('start' => '"', 'end' => '"', 'escape' => '"');
+
+    var $_lasterror = '';
+
+    var $fix_assoc_fields_names = false;
+
+    // }}}
+    // {{{ constructor
+
+    /**
+     * Constructor
+     */
+    function __construct()
+    {
+        parent::__construct();
+
+        $this->phptype = 'sqlite';
+        $this->dbsyntax = 'sqlite';
+
+        $this->supported['sequences'] = 'emulated';
+        $this->supported['indexes'] = true;
+        $this->supported['affected_rows'] = true;
+        $this->supported['summary_functions'] = true;
+        $this->supported['order_by_text'] = true;
+        $this->supported['current_id'] = 'emulated';
+        $this->supported['limit_queries'] = true;
+        $this->supported['LOBs'] = true;
+        $this->supported['replace'] = true;
+        $this->supported['transactions'] = true;
+        $this->supported['savepoints'] = false;
+        $this->supported['sub_selects'] = true;
+        $this->supported['triggers'] = true;
+        $this->supported['auto_increment'] = true;
+        $this->supported['primary_key'] = false; // requires alter table implementation
+        $this->supported['result_introspection'] = false; // not implemented
+        $this->supported['prepared_statements'] = 'emulated';
+        $this->supported['identifier_quoting'] = true;
+        $this->supported['pattern_escaping'] = false;
+        $this->supported['new_link'] = false;
+
+        $this->options['DBA_username'] = false;
+        $this->options['DBA_password'] = false;
+        $this->options['base_transaction_name'] = '___php_MDB2_sqlite_auto_commit_off';
+        $this->options['fixed_float'] = 0;
+        $this->options['database_path'] = '';
+        $this->options['database_extension'] = '';
+        $this->options['server_version'] = '';
+        $this->options['max_identifiers_length'] = 128; //no real limit
+    }
+
+    // }}}
+    // {{{ errorInfo()
+
+    /**
+     * This method is used to collect information about an error
+     *
+     * @param integer $error
+     * @return array
+     * @access public
+     */
+    function errorInfo($error = null)
+    {
+        $native_code = null;
+        if ($this->connection) {
+            $native_code = @sqlite_last_error($this->connection);
+        }
+        $native_msg = $this->_lasterror
+            ? html_entity_decode($this->_lasterror) : @sqlite_error_string($native_code);
+            
+        // PHP 5.2+ prepends the function name to $php_errormsg, so we need
+        // this hack to work around it, per bug #9599.
+        $native_msg = preg_replace('/^sqlite[a-z_]+\(\)[^:]*: /', '', $native_msg);
+
+        if (is_null($error)) {
+            static $error_regexps;
+            if (empty($error_regexps)) {
+                $error_regexps = array(
+                    '/^no such table:/' => MDB2_ERROR_NOSUCHTABLE,
+                    '/^no such index:/' => MDB2_ERROR_NOT_FOUND,
+                    '/^(table|index) .* already exists$/' => MDB2_ERROR_ALREADY_EXISTS,
+                    '/PRIMARY KEY must be unique/i' => MDB2_ERROR_CONSTRAINT,
+                    '/is not unique/' => MDB2_ERROR_CONSTRAINT,
+                    '/columns .* are not unique/i' => MDB2_ERROR_CONSTRAINT,
+                    '/uniqueness constraint failed/' => MDB2_ERROR_CONSTRAINT,
+                    '/may not be NULL/' => MDB2_ERROR_CONSTRAINT_NOT_NULL,
+                    '/^no such column:/' => MDB2_ERROR_NOSUCHFIELD,
+                    '/no column named/' => MDB2_ERROR_NOSUCHFIELD,
+                    '/column not present in both tables/i' => MDB2_ERROR_NOSUCHFIELD,
+                    '/^near ".*": syntax error$/' => MDB2_ERROR_SYNTAX,
+                    '/[0-9]+ values for [0-9]+ columns/i' => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+                 );
+            }
+            foreach ($error_regexps as $regexp => $code) {
+                if (preg_match($regexp, $native_msg)) {
+                    $error = $code;
+                    break;
+                }
+            }
+        }
+        return array($error, $native_code, $native_msg);
+    }
+
+    // }}}
+    // {{{ escape()
+
+    /**
+     * Quotes a string so it can be safely used in a query. It will quote
+     * the text so it can safely be used within a query.
+     *
+     * @param   string  the input string to quote
+     * @param   bool    escape wildcards
+     *
+     * @return  string  quoted string
+     *
+     * @access  public
+     */
+    function escape($text, $escape_wildcards = false)
+    {
+        $text = @sqlite_escape_string($text);
+        return $text;
+    }
+
+    // }}}
+    // {{{ beginTransaction()
+
+    /**
+     * Start a transaction or set a savepoint.
+     *
+     * @param   string  name of a savepoint to set
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function beginTransaction($savepoint = null)
+    {
+        $this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!is_null($savepoint)) {
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'savepoints are not supported', __FUNCTION__);
+        } elseif ($this->in_transaction) {
+            return MDB2_OK;  //nothing to do
+        }
+        if (!$this->destructor_registered && $this->opened_persistent) {
+            $this->destructor_registered = true;
+            register_shutdown_function('MDB2_closeOpenTransactions');
+        }
+        $query = 'BEGIN TRANSACTION '.$this->options['base_transaction_name'];
+        $result =& $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = true;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ commit()
+
+    /**
+     * Commit the database changes done during a transaction that is in
+     * progress or release a savepoint. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after committing the pending changes.
+     *
+     * @param   string  name of a savepoint to release
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function commit($savepoint = null)
+    {
+        $this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (!is_null($savepoint)) {
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'savepoints are not supported', __FUNCTION__);
+        }
+
+        $query = 'COMMIT TRANSACTION '.$this->options['base_transaction_name'];
+        $result =& $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{
+
+    /**
+     * Cancel any database changes done during a transaction or since a specific
+     * savepoint that is in progress. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after canceling the pending changes.
+     *
+     * @param   string  name of a savepoint to rollback to
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function rollback($savepoint = null)
+    {
+        $this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'rollback cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (!is_null($savepoint)) {
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'savepoints are not supported', __FUNCTION__);
+        }
+
+        $query = 'ROLLBACK TRANSACTION '.$this->options['base_transaction_name'];
+        $result =& $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ function setTransactionIsolation()
+
+    /**
+     * Set the transacton isolation level.
+     *
+     * @param   string  standard isolation level
+     *                  READ UNCOMMITTED (allows dirty reads)
+     *                  READ COMMITTED (prevents dirty reads)
+     *                  REPEATABLE READ (prevents nonrepeatable reads)
+     *                  SERIALIZABLE (prevents phantom reads)
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     * @since   2.1.1
+     */
+    function setTransactionIsolation($isolation)
+    {
+        $this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
+        switch ($isolation) {
+        case 'READ UNCOMMITTED':
+            $isolation = 0;
+            break;
+        case 'READ COMMITTED':
+        case 'REPEATABLE READ':
+        case 'SERIALIZABLE':
+            $isolation = 1;
+            break;
+        default:
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'isolation level is not supported: '.$isolation, __FUNCTION__);
+        }
+
+        $query = "PRAGMA read_uncommitted=$isolation";
+        return $this->_doQuery($query, true);
+    }
+
+    // }}}
+    // {{{ getDatabaseFile()
+
+    /**
+     * Builds the string with path+dbname+extension
+     *
+     * @return string full database path+file
+     * @access protected
+     */
+    function _getDatabaseFile($database_name)
+    {
+        if ($database_name === '' || $database_name === ':memory:') {
+            return $database_name;
+        }
+        return $this->options['database_path'].$database_name.$this->options['database_extension'];
+    }
+
+    // }}}
+    // {{{ connect()
+
+    /**
+     * Connect to the database
+     *
+     * @return true on success, MDB2 Error Object on failure
+     **/
+    function connect()
+    {
+        $database_file = $this->_getDatabaseFile($this->database_name);
+        if (is_resource($this->connection)) {
+            //if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
+            if (MDB2::areEquals($this->connected_dsn, $this->dsn)
+                && $this->connected_database_name == $database_file
+                && $this->opened_persistent == $this->options['persistent']
+            ) {
+                return MDB2_OK;
+            }
+            $this->disconnect(false);
+        }
+
+        if (!PEAR::loadExtension($this->phptype)) {
+            return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
+        }
+
+        if (empty($this->database_name)) {
+            return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+            'unable to establish a connection', __FUNCTION__);
+        }
+
+        if ($database_file !== ':memory:') {
+            if (!file_exists($database_file)) {
+                if (!touch($database_file)) {
+                    return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                        'Could not create database file', __FUNCTION__);
+                }
+                if (!isset($this->dsn['mode'])
+                    || !is_numeric($this->dsn['mode'])
+                ) {
+                    $mode = 0644;
+                } else {
+                    $mode = octdec($this->dsn['mode']);
+                }
+                if (!chmod($database_file, $mode)) {
+                    return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                        'Could not be chmodded database file', __FUNCTION__);
+                }
+                if (!file_exists($database_file)) {
+                    return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                        'Could not be found database file', __FUNCTION__);
+                }
+            }
+            if (!is_file($database_file)) {
+                return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                        'Database is a directory name', __FUNCTION__);
+            }
+            if (!is_readable($database_file)) {
+                return $this->raiseError(MDB2_ERROR_ACCESS_VIOLATION, null, null,
+                        'Could not read database file', __FUNCTION__);
+            }
+        }
+
+        $connect_function = ($this->options['persistent'] ? 'sqlite_popen' : 'sqlite_open');
+        $php_errormsg = '';
+        if (version_compare('5.1.0', PHP_VERSION, '>')) {
+            @ini_set('track_errors', true);
+            $connection = @$connect_function($database_file);
+            @ini_restore('track_errors');
+        } else {
+            $connection = @$connect_function($database_file, 0666, $php_errormsg);
+        }
+        $this->_lasterror = $php_errormsg;
+        if (!$connection) {
+            return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+            'unable to establish a connection', __FUNCTION__);
+        }
+
+        if ($this->fix_assoc_fields_names ||
+            $this->options['portability'] & MDB2_PORTABILITY_FIX_ASSOC_FIELD_NAMES)
+        {
+            @sqlite_query("PRAGMA short_column_names = 1", $connection);
+            $this->fix_assoc_fields_names = true;
+        }
+
+        $this->connection = $connection;
+        $this->connected_dsn = $this->dsn;
+        $this->connected_database_name = $database_file;
+        $this->opened_persistent = $this->getoption('persistent');
+        $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
+
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ databaseExists()
+
+    /**
+     * check if given database name is exists?
+     *
+     * @param string $name    name of the database that should be checked
+     *
+     * @return mixed true/false on success, a MDB2 error on failure
+     * @access public
+     */
+    function databaseExists($name)
+    {
+        $database_file = $this->_getDatabaseFile($name);
+        $result = file_exists($database_file);
+        return $result;
+    }
+
+    // }}}
+    // {{{ disconnect()
+
+    /**
+     * Log out and disconnect from the database.
+     *
+     * @param  boolean $force if the disconnect should be forced even if the
+     *                        connection is opened persistently
+     * @return mixed true on success, false if not connected and error
+     *                object on error
+     * @access public
+     */
+    function disconnect($force = true)
+    {
+        if (is_resource($this->connection)) {
+            if ($this->in_transaction) {
+                $dsn = $this->dsn;
+                $database_name = $this->database_name;
+                $persistent = $this->options['persistent'];
+                $this->dsn = $this->connected_dsn;
+                $this->database_name = $this->connected_database_name;
+                $this->options['persistent'] = $this->opened_persistent;
+                $this->rollback();
+                $this->dsn = $dsn;
+                $this->database_name = $database_name;
+                $this->options['persistent'] = $persistent;
+            }
+
+            if (!$this->opened_persistent || $force) {
+                @sqlite_close($this->connection);
+            }
+        } else {
+            return false;
+        }
+        return parent::disconnect($force);
+    }
+
+    // }}}
+    // {{{ _doQuery()
+
+    /**
+     * Execute a query
+     * @param string $query  query
+     * @param boolean $is_manip  if the query is a manipulation query
+     * @param resource $connection
+     * @param string $database_name
+     * @return result or error object
+     * @access protected
+     */
+    function &_doQuery($query, $is_manip = false, $connection = null, $database_name = null)
+    {
+        $this->last_query = $query;
+        $result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
+        if ($result) {
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            $query = $result;
+        }
+        if ($this->options['disable_query']) {
+            $result = $is_manip ? 0 : null;
+            return $result;
+        }
+
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+
+        $function = $this->options['result_buffering']
+            ? 'sqlite_query' : 'sqlite_unbuffered_query';
+        $php_errormsg = '';
+        if (version_compare('5.1.0', PHP_VERSION, '>')) {
+            @ini_set('track_errors', true);
+            do {
+                $result = @$function($query.';', $connection);
+            } while (sqlite_last_error($connection) == SQLITE_SCHEMA);
+            @ini_restore('track_errors');
+        } else {
+            do {
+                $result = @$function($query.';', $connection, SQLITE_BOTH, $php_errormsg);
+            } while (sqlite_last_error($connection) == SQLITE_SCHEMA);
+        }
+        $this->_lasterror = $php_errormsg;
+
+        if (!$result) {
+            $err =& $this->raiseError(null, null, null,
+                'Could not execute statement', __FUNCTION__);
+            return $err;
+        }
+
+        $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
+        return $result;
+    }
+
+    // }}}
+    // {{{ _affectedRows()
+
+    /**
+     * Returns the number of rows affected
+     *
+     * @param resource $result
+     * @param resource $connection
+     * @return mixed MDB2 Error Object or the number of rows affected
+     * @access private
+     */
+    function _affectedRows($connection, $result = null)
+    {
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        return @sqlite_changes($connection);
+    }
+
+    // }}}
+    // {{{ _modifyQuery()
+
+    /**
+     * Changes a query string for various DBMS specific reasons
+     *
+     * @param string $query  query to modify
+     * @param boolean $is_manip  if it is a DML query
+     * @param integer $limit  limit the number of rows
+     * @param integer $offset  start reading from given offset
+     * @return string modified query
+     * @access protected
+     */
+    function _modifyQuery($query, $is_manip, $limit, $offset)
+    {
+        if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) {
+            if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
+                $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
+                                      'DELETE FROM \1 WHERE 1=1', $query);
+            }
+        }
+        if ($limit > 0
+            && !preg_match('/LIMIT\s*\d(?:\s*(?:,|OFFSET)\s*\d+)?(?:[^\)]*)?$/i', $query)
+        ) {
+            $query = rtrim($query);
+            if (substr($query, -1) == ';') {
+                $query = substr($query, 0, -1);
+            }
+            if ($is_manip) {
+                $query.= " LIMIT $limit";
+            } else {
+                $query.= " LIMIT $offset,$limit";
+            }
+        }
+        return $query;
+    }
+
+    // }}}
+    // {{{ getServerVersion()
+
+    /**
+     * return version information about the server
+     *
+     * @param bool   $native  determines if the raw version string should be returned
+     * @return mixed array/string with version information or MDB2 error object
+     * @access public
+     */
+    function getServerVersion($native = false)
+    {
+        $server_info = false;
+        if ($this->connected_server_info) {
+            $server_info = $this->connected_server_info;
+        } elseif ($this->options['server_version']) {
+            $server_info = $this->options['server_version'];
+        } elseif (function_exists('sqlite_libversion')) {
+            $server_info = @sqlite_libversion();
+        }
+        if (!$server_info) {
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'Requires either the "server_version" option or the sqlite_libversion() function', __FUNCTION__);
+        }
+        // cache server_info
+        $this->connected_server_info = $server_info;
+        if (!$native) {
+            $tmp = explode('.', $server_info, 3);
+            $server_info = array(
+                'major' => isset($tmp[0]) ? $tmp[0] : null,
+                'minor' => isset($tmp[1]) ? $tmp[1] : null,
+                'patch' => isset($tmp[2]) ? $tmp[2] : null,
+                'extra' => null,
+                'native' => $server_info,
+            );
+        }
+        return $server_info;
+    }
+
+    // }}}
+    // {{{ replace()
+
+    /**
+     * Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
+     * query, except that if there is already a row in the table with the same
+     * key field values, the old row is deleted before the new row is inserted.
+     *
+     * The REPLACE type of query does not make part of the SQL standards. Since
+     * practically only SQLite implements it natively, this type of query is
+     * emulated through this method for other DBMS using standard types of
+     * queries inside a transaction to assure the atomicity of the operation.
+     *
+     * @access public
+     *
+     * @param string $table name of the table on which the REPLACE query will
+     *  be executed.
+     * @param array $fields associative array that describes the fields and the
+     *  values that will be inserted or updated in the specified table. The
+     *  indexes of the array are the names of all the fields of the table. The
+     *  values of the array are also associative arrays that describe the
+     *  values and other properties of the table fields.
+     *
+     *  Here follows a list of field properties that need to be specified:
+     *
+     *    value:
+     *          Value to be assigned to the specified field. This value may be
+     *          of specified in database independent type format as this
+     *          function can perform the necessary datatype conversions.
+     *
+     *    Default:
+     *          this property is required unless the Null property
+     *          is set to 1.
+     *
+     *    type
+     *          Name of the type of the field. Currently, all types Metabase
+     *          are supported except for clob and blob.
+     *
+     *    Default: no type conversion
+     *
+     *    null
+     *          Boolean property that indicates that the value for this field
+     *          should be set to null.
+     *
+     *          The default value for fields missing in INSERT queries may be
+     *          specified the definition of a table. Often, the default value
+     *          is already null, but since the REPLACE may be emulated using
+     *          an UPDATE query, make sure that all fields of the table are
+     *          listed in this function argument array.
+     *
+     *    Default: 0
+     *
+     *    key
+     *          Boolean property that indicates that this field should be
+     *          handled as a primary key or at least as part of the compound
+     *          unique index of the table that will determine the row that will
+     *          updated if it exists or inserted a new row otherwise.
+     *
+     *          This function will fail if no key field is specified or if the
+     *          value of a key field is set to null because fields that are
+     *          part of unique index they may not be null.
+     *
+     *    Default: 0
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     */
+    function replace($table, $fields)
+    {
+        $count = count($fields);
+        $query = $values = '';
+        $keys = $colnum = 0;
+        for (reset($fields); $colnum < $count; next($fields), $colnum++) {
+            $name = key($fields);
+            if ($colnum > 0) {
+                $query .= ',';
+                $values.= ',';
+            }
+            $query.= $this->quoteIdentifier($name, true);
+            if (isset($fields[$name]['null']) && $fields[$name]['null']) {
+                $value = 'NULL';
+            } else {
+                $type = isset($fields[$name]['type']) ? $fields[$name]['type'] : null;
+                $value = $this->quote($fields[$name]['value'], $type);
+                if (PEAR::isError($value)) {
+                    return $value;
+                }
+            }
+            $values.= $value;
+            if (isset($fields[$name]['key']) && $fields[$name]['key']) {
+                if ($value === 'NULL') {
+                    return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+                        'key value '.$name.' may not be NULL', __FUNCTION__);
+                }
+                $keys++;
+            }
+        }
+        if ($keys == 0) {
+            return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+                'not specified which fields are keys', __FUNCTION__);
+        }
+
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $table = $this->quoteIdentifier($table, true);
+        $query = "REPLACE INTO $table ($query) VALUES ($values)";
+        $result =& $this->_doQuery($query, true, $connection);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        return $this->_affectedRows($connection, $result);
+    }
+
+    // }}}
+    // {{{ nextID()
+
+    /**
+     * Returns the next free id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @param boolean $ondemand when true the sequence is
+     *                          automatic created, if it
+     *                          not exists
+     *
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function nextID($seq_name, $ondemand = true)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        $seqcol_name = $this->options['seqcol_name'];
+        $query = "INSERT INTO $sequence_name ($seqcol_name) VALUES (NULL)";
+        $this->pushErrorHandling(PEAR_ERROR_RETURN);
+        $this->expectError(MDB2_ERROR_NOSUCHTABLE);
+        $result =& $this->_doQuery($query, true);
+        $this->popExpect();
+        $this->popErrorHandling();
+        if (PEAR::isError($result)) {
+            if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
+                $this->loadModule('Manager', null, true);
+                $result = $this->manager->createSequence($seq_name);
+                if (PEAR::isError($result)) {
+                    return $this->raiseError($result, null, null,
+                        'on demand sequence '.$seq_name.' could not be created', __FUNCTION__);
+                } else {
+                    return $this->nextID($seq_name, false);
+                }
+            }
+            return $result;
+        }
+        $value = $this->lastInsertID();
+        if (is_numeric($value)) {
+            $query = "DELETE FROM $sequence_name WHERE $seqcol_name < $value";
+            $result =& $this->_doQuery($query, true);
+            if (PEAR::isError($result)) {
+                $this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
+            }
+        }
+        return $value;
+    }
+
+    // }}}
+    // {{{ lastInsertID()
+
+    /**
+     * Returns the autoincrement ID if supported or $id or fetches the current
+     * ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
+     *
+     * @param string $table name of the table into which a new row was inserted
+     * @param string $field name of the field into which a new row was inserted
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function lastInsertID($table = null, $field = null)
+    {
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        $value = @sqlite_last_insert_rowid($connection);
+        if (!$value) {
+            return $this->raiseError(null, null, null,
+                'Could not get last insert ID', __FUNCTION__);
+        }
+        return $value;
+    }
+
+    // }}}
+    // {{{ currID()
+
+    /**
+     * Returns the current id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function currID($seq_name)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        $seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
+        $query = "SELECT MAX($seqcol_name) FROM $sequence_name";
+        return $this->queryOne($query, 'integer');
+    }
+}
+
+/**
+ * MDB2 SQLite result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Result_sqlite extends MDB2_Result_Common
+{
+    // }}}
+    // {{{ fetchRow()
+
+    /**
+     * Fetch a row and insert the data into an existing array.
+     *
+     * @param int       $fetchmode  how the array data should be indexed
+     * @param int    $rownum    number of the row where the data can be found
+     * @return int data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
+    {
+        if (!is_null($rownum)) {
+            $seek = $this->seek($rownum);
+            if (PEAR::isError($seek)) {
+                return $seek;
+            }
+        }
+        if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
+            $fetchmode = $this->db->fetchmode;
+        }
+        if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
+            $row = @sqlite_fetch_array($this->result, SQLITE_ASSOC);
+            if (is_array($row)
+                && $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
+            ) {
+                $row = array_change_key_case($row, $this->db->options['field_case']);
+            }
+        } else {
+           $row = @sqlite_fetch_array($this->result, SQLITE_NUM);
+        }
+        if (!$row) {
+            if ($this->result === false) {
+                $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+                return $err;
+            }
+            $null = null;
+            return $null;
+        }
+        $mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;
+        $rtrim = false;
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {
+            if (empty($this->types)) {
+                $mode += MDB2_PORTABILITY_RTRIM;
+            } else {
+                $rtrim = true;
+            }
+        }
+        if ($mode) {
+            $this->db->_fixResultArrayValues($row, $mode);
+        }
+        if (!empty($this->types)) {
+            $row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);
+        }
+        if (!empty($this->values)) {
+            $this->_assignBindColumns($row);
+        }
+        if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
+            $object_class = $this->db->options['fetch_class'];
+            if ($object_class == 'stdClass') {
+                $row = (object) $row;
+            } else {
+                $row = &new $object_class($row);
+            }
+        }
+        ++$this->rownum;
+        return $row;
+    }
+
+    // }}}
+    // {{{ _getColumnNames()
+
+    /**
+     * Retrieve the names of columns returned by the DBMS in a query result.
+     *
+     * @return  mixed   Array variable that holds the names of columns as keys
+     *                  or an MDB2 error on failure.
+     *                  Some DBMS may not return any columns when the result set
+     *                  does not contain any rows.
+     * @access private
+     */
+    function _getColumnNames()
+    {
+        $columns = array();
+        $numcols = $this->numCols();
+        if (PEAR::isError($numcols)) {
+            return $numcols;
+        }
+        for ($column = 0; $column < $numcols; $column++) {
+            $column_name = @sqlite_field_name($this->result, $column);
+            $columns[$column_name] = $column;
+        }
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $columns = array_change_key_case($columns, $this->db->options['field_case']);
+        }
+        return $columns;
+    }
+
+    // }}}
+    // {{{ numCols()
+
+    /**
+     * Count the number of columns returned by the DBMS in a query result.
+     *
+     * @access public
+     * @return mixed integer value with the number of columns, a MDB2 error
+     *                       on failure
+     */
+    function numCols()
+    {
+        $cols = @sqlite_num_fields($this->result);
+        if (is_null($cols)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return count($this->types);
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get column count', __FUNCTION__);
+        }
+        return $cols;
+    }
+}
+
+/**
+ * MDB2 SQLite buffered result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_BufferedResult_sqlite extends MDB2_Result_sqlite
+{
+    // {{{ seek()
+
+    /**
+     * Seek to a specific row in a result set
+     *
+     * @param int    $rownum    number of the row where the data can be found
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function seek($rownum = 0)
+    {
+        if (!@sqlite_seek($this->result, $rownum)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return MDB2_OK;
+            }
+            return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
+                'tried to seek to an invalid row number ('.$rownum.')', __FUNCTION__);
+        }
+        $this->rownum = $rownum - 1;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ valid()
+
+    /**
+     * Check if the end of the result set has been reached
+     *
+     * @return mixed true or false on sucess, a MDB2 error on failure
+     * @access public
+     */
+    function valid()
+    {
+        $numrows = $this->numRows();
+        if (PEAR::isError($numrows)) {
+            return $numrows;
+        }
+        return $this->rownum < ($numrows - 1);
+    }
+
+    // }}}
+    // {{{ numRows()
+
+    /**
+     * Returns the number of rows in a result object
+     *
+     * @return mixed MDB2 Error Object or the number of rows
+     * @access public
+     */
+    function numRows()
+    {
+        $rows = @sqlite_num_rows($this->result);
+        if (is_null($rows)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return 0;
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get row count', __FUNCTION__);
+        }
+        return $rows;
+    }
+}
+
+/**
+ * MDB2 SQLite statement driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Statement_sqlite extends MDB2_Statement_Common
+{
+
+}
+
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Extended.php b/inc/MDB2/Extended.php
new file mode 100755
index 00000000000..864ab923543
--- /dev/null
+++ b/inc/MDB2/Extended.php
@@ -0,0 +1,721 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: Extended.php,v 1.60 2007/11/28 19:49:34 quipo Exp $
+
+/**
+ * @package  MDB2
+ * @category Database
+ * @author   Lukas Smith <smith@pooteeweet.org>
+ */
+
+/**
+ * Used by autoPrepare()
+ */
+define('MDB2_AUTOQUERY_INSERT', 1);
+define('MDB2_AUTOQUERY_UPDATE', 2);
+define('MDB2_AUTOQUERY_DELETE', 3);
+define('MDB2_AUTOQUERY_SELECT', 4);
+
+/**
+ * MDB2_Extended: class which adds several high level methods to MDB2
+ *
+ * @package MDB2
+ * @category Database
+ * @author Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Extended extends MDB2_Module_Common
+{
+    // {{{ autoPrepare()
+
+    /**
+     * Generate an insert, update or delete query and call prepare() on it
+     *
+     * @param string table
+     * @param array the fields names
+     * @param int type of query to build
+     *                          MDB2_AUTOQUERY_INSERT
+     *                          MDB2_AUTOQUERY_UPDATE
+     *                          MDB2_AUTOQUERY_DELETE
+     *                          MDB2_AUTOQUERY_SELECT
+     * @param string (in case of update and delete queries, this string will be put after the sql WHERE statement)
+     * @param array that contains the types of the placeholders
+     * @param mixed array that contains the types of the columns in
+     *                        the result set or MDB2_PREPARE_RESULT, if set to
+     *                        MDB2_PREPARE_MANIP the query is handled as a manipulation query
+     *
+     * @return resource handle for the query
+     * @see buildManipSQL
+     * @access public
+     */
+    function autoPrepare($table, $table_fields, $mode = MDB2_AUTOQUERY_INSERT,
+        $where = false, $types = null, $result_types = MDB2_PREPARE_MANIP)
+    {
+        $query = $this->buildManipSQL($table, $table_fields, $mode, $where);
+        if (PEAR::isError($query)) {
+            return $query;
+        }
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+        $lobs = array();
+        foreach ((array)$types as $param => $type) {
+            if (($type == 'clob') || ($type == 'blob')) {
+                $lobs[$param] = $table_fields[$param];
+            }
+        }
+        return $db->prepare($query, $types, $result_types, $lobs);
+    }
+
+    // }}}
+    // {{{ autoExecute()
+
+    /**
+     * Generate an insert, update or delete query and call prepare() and execute() on it
+     *
+     * @param string name of the table
+     * @param array assoc ($key=>$value) where $key is a field name and $value its value
+     * @param int type of query to build
+     *                          MDB2_AUTOQUERY_INSERT
+     *                          MDB2_AUTOQUERY_UPDATE
+     *                          MDB2_AUTOQUERY_DELETE
+     *                          MDB2_AUTOQUERY_SELECT
+     * @param string (in case of update and delete queries, this string will be put after the sql WHERE statement)
+     * @param array that contains the types of the placeholders
+     * @param string which specifies which result class to use
+     * @param mixed  array that contains the types of the columns in
+     *                        the result set or MDB2_PREPARE_RESULT, if set to
+     *                        MDB2_PREPARE_MANIP the query is handled as a manipulation query
+     *
+     * @return bool|MDB2_Error true on success, a MDB2 error on failure
+     * @see buildManipSQL
+     * @see autoPrepare
+     * @access public
+    */
+    function &autoExecute($table, $fields_values, $mode = MDB2_AUTOQUERY_INSERT,
+        $where = false, $types = null, $result_class = true, $result_types = MDB2_PREPARE_MANIP)
+    {
+        $fields_values = (array)$fields_values;
+        if ($mode == MDB2_AUTOQUERY_SELECT) {
+            if (is_array($result_types)) {
+                $keys = array_keys($result_types);
+            } elseif (!empty($fields_values)) {
+                $keys = $fields_values;
+            } else {
+                $keys = array();
+            }
+        } else {
+            $keys = array_keys($fields_values);
+        }
+        $params = array_values($fields_values);
+        if (empty($params)) {
+            $query = $this->buildManipSQL($table, $keys, $mode, $where);
+
+            $db =& $this->getDBInstance();
+            if (PEAR::isError($db)) {
+                return $db;
+            }
+            if ($mode == MDB2_AUTOQUERY_SELECT) {
+                $result =& $db->query($query, $result_types, $result_class);
+            } else {
+                $result = $db->exec($query);
+            }
+        } else {
+            $stmt = $this->autoPrepare($table, $keys, $mode, $where, $types, $result_types);
+            if (PEAR::isError($stmt)) {
+                return $stmt;
+            }
+            $result =& $stmt->execute($params, $result_class);
+            $stmt->free();
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ buildManipSQL()
+
+    /**
+     * Make automaticaly an sql query for prepare()
+     *
+     * Example : buildManipSQL('table_sql', array('field1', 'field2', 'field3'), MDB2_AUTOQUERY_INSERT)
+     *           will return the string : INSERT INTO table_sql (field1,field2,field3) VALUES (?,?,?)
+     * NB : - This belongs more to a SQL Builder class, but this is a simple facility
+     *      - Be carefull ! If you don't give a $where param with an UPDATE/DELETE query, all
+     *        the records of the table will be updated/deleted !
+     *
+     * @param string name of the table
+     * @param ordered array containing the fields names
+     * @param int type of query to build
+     *                          MDB2_AUTOQUERY_INSERT
+     *                          MDB2_AUTOQUERY_UPDATE
+     *                          MDB2_AUTOQUERY_DELETE
+     *                          MDB2_AUTOQUERY_SELECT
+     * @param string (in case of update and delete queries, this string will be put after the sql WHERE statement)
+     *
+     * @return string sql query for prepare()
+     * @access public
+     */
+    function buildManipSQL($table, $table_fields, $mode, $where = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if ($db->options['quote_identifier']) {
+            $table = $db->quoteIdentifier($table);
+        }
+
+        if (!empty($table_fields) && $db->options['quote_identifier']) {
+            foreach ($table_fields as $key => $field) {
+                $table_fields[$key] = $db->quoteIdentifier($field);
+            }
+        }
+
+        if ($where !== false && !is_null($where)) {
+            if (is_array($where)) {
+                $where = implode(' AND ', $where);
+            }
+            $where = ' WHERE '.$where;
+        }
+
+        switch ($mode) {
+        case MDB2_AUTOQUERY_INSERT:
+            if (empty($table_fields)) {
+                return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'Insert requires table fields', __FUNCTION__);
+            }
+            $cols = implode(', ', $table_fields);
+            $values = '?'.str_repeat(', ?', (count($table_fields) - 1));
+            return 'INSERT INTO '.$table.' ('.$cols.') VALUES ('.$values.')';
+            break;
+        case MDB2_AUTOQUERY_UPDATE:
+            if (empty($table_fields)) {
+                return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'Update requires table fields', __FUNCTION__);
+            }
+            $set = implode(' = ?, ', $table_fields).' = ?';
+            $sql = 'UPDATE '.$table.' SET '.$set.$where;
+            return $sql;
+            break;
+        case MDB2_AUTOQUERY_DELETE:
+            $sql = 'DELETE FROM '.$table.$where;
+            return $sql;
+            break;
+        case MDB2_AUTOQUERY_SELECT:
+            $cols = !empty($table_fields) ? implode(', ', $table_fields) : '*';
+            $sql = 'SELECT '.$cols.' FROM '.$table.$where;
+            return $sql;
+            break;
+        }
+        return $db->raiseError(MDB2_ERROR_SYNTAX, null, null,
+                'Non existant mode', __FUNCTION__);
+    }
+
+    // }}}
+    // {{{ limitQuery()
+
+    /**
+     * Generates a limited query
+     *
+     * @param string query
+     * @param array that contains the types of the columns in the result set
+     * @param integer the numbers of rows to fetch
+     * @param integer the row to start to fetching
+     * @param string which specifies which result class to use
+     * @param mixed   string which specifies which class to wrap results in
+     *
+     * @return MDB2_Result|MDB2_Error result set on success, a MDB2 error on failure
+     * @access public
+     */
+    function &limitQuery($query, $types, $limit, $offset = 0, $result_class = true,
+        $result_wrap_class = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        $result = $db->setLimit($limit, $offset);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $result =& $db->query($query, $types, $result_class, $result_wrap_class);
+        return $result;
+    }
+
+    // }}}
+    // {{{ execParam()
+
+    /**
+     * Execute a parameterized DML statement.
+     *
+     * @param string the SQL query
+     * @param array if supplied, prepare/execute will be used
+     *       with this array as execute parameters
+     * @param array that contains the types of the values defined in $params
+     *
+     * @return int|MDB2_Error affected rows on success, a MDB2 error on failure
+     * @access public
+     */
+    function execParam($query, $params = array(), $param_types = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        settype($params, 'array');
+        if (empty($params)) {
+            return $db->exec($query);
+        }
+
+        $stmt = $db->prepare($query, $param_types, MDB2_PREPARE_MANIP);
+        if (PEAR::isError($stmt)) {
+            return $stmt;
+        }
+
+        $result = $stmt->execute($params);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+
+        $stmt->free();
+        return $result;
+    }
+
+    // }}}
+    // {{{ getOne()
+
+    /**
+     * Fetch the first column of the first row of data returned from a query.
+     * Takes care of doing the query and freeing the results when finished.
+     *
+     * @param string the SQL query
+     * @param string that contains the type of the column in the result set
+     * @param array if supplied, prepare/execute will be used
+     *       with this array as execute parameters
+     * @param array that contains the types of the values defined in $params
+     * @param int|string which column to return
+     *
+     * @return scalar|MDB2_Error data on success, a MDB2 error on failure
+     * @access public
+     */
+    function getOne($query, $type = null, $params = array(),
+        $param_types = null, $colnum = 0)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        settype($params, 'array');
+        settype($type, 'array');
+        if (empty($params)) {
+            return $db->queryOne($query, $type, $colnum);
+        }
+
+        $stmt = $db->prepare($query, $param_types, $type);
+        if (PEAR::isError($stmt)) {
+            return $stmt;
+        }
+
+        $result = $stmt->execute($params);
+        if (!MDB2::isResultCommon($result)) {
+            return $result;
+        }
+
+        $one = $result->fetchOne($colnum);
+        $stmt->free();
+        $result->free();
+        return $one;
+    }
+
+    // }}}
+    // {{{ getRow()
+
+    /**
+     * Fetch the first row of data returned from a query.  Takes care
+     * of doing the query and freeing the results when finished.
+     *
+     * @param string the SQL query
+     * @param array that contains the types of the columns in the result set
+     * @param array if supplied, prepare/execute will be used
+     *       with this array as execute parameters
+     * @param array that contains the types of the values defined in $params
+     * @param int the fetch mode to use
+     *
+     * @return array|MDB2_Error data on success, a MDB2 error on failure
+     * @access public
+     */
+    function getRow($query, $types = null, $params = array(),
+        $param_types = null, $fetchmode = MDB2_FETCHMODE_DEFAULT)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        settype($params, 'array');
+        if (empty($params)) {
+            return $db->queryRow($query, $types, $fetchmode);
+        }
+
+        $stmt = $db->prepare($query, $param_types, $types);
+        if (PEAR::isError($stmt)) {
+            return $stmt;
+        }
+
+        $result = $stmt->execute($params);
+        if (!MDB2::isResultCommon($result)) {
+            return $result;
+        }
+
+        $row = $result->fetchRow($fetchmode);
+        $stmt->free();
+        $result->free();
+        return $row;
+    }
+
+    // }}}
+    // {{{ getCol()
+
+    /**
+     * Fetch a single column from a result set and return it as an
+     * indexed array.
+     *
+     * @param string the SQL query
+     * @param string that contains the type of the column in the result set
+     * @param array if supplied, prepare/execute will be used
+     *       with this array as execute parameters
+     * @param array that contains the types of the values defined in $params
+     * @param int|string which column to return
+     *
+     * @return array|MDB2_Error data on success, a MDB2 error on failure
+     * @access public
+     */
+    function getCol($query, $type = null, $params = array(),
+        $param_types = null, $colnum = 0)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        settype($params, 'array');
+        settype($type, 'array');
+        if (empty($params)) {
+            return $db->queryCol($query, $type, $colnum);
+        }
+
+        $stmt = $db->prepare($query, $param_types, $type);
+        if (PEAR::isError($stmt)) {
+            return $stmt;
+        }
+
+        $result = $stmt->execute($params);
+        if (!MDB2::isResultCommon($result)) {
+            return $result;
+        }
+
+        $col = $result->fetchCol($colnum);
+        $stmt->free();
+        $result->free();
+        return $col;
+    }
+
+    // }}}
+    // {{{ getAll()
+
+    /**
+     * Fetch all the rows returned from a query.
+     *
+     * @param string the SQL query
+     * @param array that contains the types of the columns in the result set
+     * @param array if supplied, prepare/execute will be used
+     *       with this array as execute parameters
+     * @param array that contains the types of the values defined in $params
+     * @param int the fetch mode to use
+     * @param bool if set to true, the $all will have the first
+     *       column as its first dimension
+     * @param bool $force_array used only when the query returns exactly
+     *       two columns. If true, the values of the returned array will be
+     *       one-element arrays instead of scalars.
+     * @param bool $group if true, the values of the returned array is
+     *       wrapped in another array.  If the same key value (in the first
+     *       column) repeats itself, the values will be appended to this array
+     *       instead of overwriting the existing values.
+     *
+     * @return array|MDB2_Error data on success, a MDB2 error on failure
+     * @access public
+     */
+    function getAll($query, $types = null, $params = array(),
+        $param_types = null, $fetchmode = MDB2_FETCHMODE_DEFAULT,
+        $rekey = false, $force_array = false, $group = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        settype($params, 'array');
+        if (empty($params)) {
+            return $db->queryAll($query, $types, $fetchmode, $rekey, $force_array, $group);
+        }
+
+        $stmt = $db->prepare($query, $param_types, $types);
+        if (PEAR::isError($stmt)) {
+            return $stmt;
+        }
+
+        $result = $stmt->execute($params);
+        if (!MDB2::isResultCommon($result)) {
+            return $result;
+        }
+
+        $all = $result->fetchAll($fetchmode, $rekey, $force_array, $group);
+        $stmt->free();
+        $result->free();
+        return $all;
+    }
+
+    // }}}
+    // {{{ getAssoc()
+
+    /**
+     * Fetch the entire result set of a query and return it as an
+     * associative array using the first column as the key.
+     *
+     * If the result set contains more than two columns, the value
+     * will be an array of the values from column 2-n.  If the result
+     * set contains only two columns, the returned value will be a
+     * scalar with the value of the second column (unless forced to an
+     * array with the $force_array parameter).  A MDB2 error code is
+     * returned on errors.  If the result set contains fewer than two
+     * columns, a MDB2_ERROR_TRUNCATED error is returned.
+     *
+     * For example, if the table 'mytable' contains:
+     * <pre>
+     *   ID      TEXT       DATE
+     * --------------------------------
+     *   1       'one'      944679408
+     *   2       'two'      944679408
+     *   3       'three'    944679408
+     * </pre>
+     * Then the call getAssoc('SELECT id,text FROM mytable') returns:
+     * <pre>
+     *    array(
+     *      '1' => 'one',
+     *      '2' => 'two',
+     *      '3' => 'three',
+     *    )
+     * </pre>
+     * ...while the call getAssoc('SELECT id,text,date FROM mytable') returns:
+     * <pre>
+     *    array(
+     *      '1' => array('one', '944679408'),
+     *      '2' => array('two', '944679408'),
+     *      '3' => array('three', '944679408')
+     *    )
+     * </pre>
+     *
+     * If the more than one row occurs with the same value in the
+     * first column, the last row overwrites all previous ones by
+     * default.  Use the $group parameter if you don't want to
+     * overwrite like this.  Example:
+     * <pre>
+     * getAssoc('SELECT category,id,name FROM mytable', null, null
+     *           MDB2_FETCHMODE_ASSOC, false, true) returns:
+     *    array(
+     *      '1' => array(array('id' => '4', 'name' => 'number four'),
+     *                   array('id' => '6', 'name' => 'number six')
+     *             ),
+     *      '9' => array(array('id' => '4', 'name' => 'number four'),
+     *                   array('id' => '6', 'name' => 'number six')
+     *             )
+     *    )
+     * </pre>
+     *
+     * Keep in mind that database functions in PHP usually return string
+     * values for results regardless of the database's internal type.
+     *
+     * @param string the SQL query
+     * @param array that contains the types of the columns in the result set
+     * @param array if supplied, prepare/execute will be used
+     *       with this array as execute parameters
+     * @param array that contains the types of the values defined in $params
+     * @param bool $force_array used only when the query returns
+     * exactly two columns.  If TRUE, the values of the returned array
+     * will be one-element arrays instead of scalars.
+     * @param bool $group if TRUE, the values of the returned array
+     *       is wrapped in another array.  If the same key value (in the first
+     *       column) repeats itself, the values will be appended to this array
+     *       instead of overwriting the existing values.
+     *
+     * @return array|MDB2_Error data on success, a MDB2 error on failure
+     * @access public
+     */
+    function getAssoc($query, $types = null, $params = array(), $param_types = null,
+        $fetchmode = MDB2_FETCHMODE_DEFAULT, $force_array = false, $group = false)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        settype($params, 'array');
+        if (empty($params)) {
+            return $db->queryAll($query, $types, $fetchmode, true, $force_array, $group);
+        }
+
+        $stmt = $db->prepare($query, $param_types, $types);
+        if (PEAR::isError($stmt)) {
+            return $stmt;
+        }
+
+        $result = $stmt->execute($params);
+        if (!MDB2::isResultCommon($result)) {
+            return $result;
+        }
+
+        $all = $result->fetchAll($fetchmode, true, $force_array, $group);
+        $stmt->free();
+        $result->free();
+        return $all;
+    }
+
+    // }}}
+    // {{{ executeMultiple()
+
+    /**
+     * This function does several execute() calls on the same statement handle.
+     * $params must be an array indexed numerically from 0, one execute call is
+     * done for every 'row' in the array.
+     *
+     * If an error occurs during execute(), executeMultiple() does not execute
+     * the unfinished rows, but rather returns that error.
+     *
+     * @param resource query handle from prepare()
+     * @param array numeric array containing the data to insert into the query
+     *
+     * @return bool|MDB2_Error true on success, a MDB2 error on failure
+     * @access public
+     * @see prepare(), execute()
+     */
+    function executeMultiple(&$stmt, $params = null)
+    {
+        for ($i = 0, $j = count($params); $i < $j; $i++) {
+            $result = $stmt->execute($params[$i]);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ getBeforeID()
+
+    /**
+     * Returns the next free id of a sequence if the RDBMS
+     * does not support auto increment
+     *
+     * @param string name of the table into which a new row was inserted
+     * @param string name of the field into which a new row was inserted
+     * @param bool when true the sequence is automatic created, if it not exists
+     * @param bool if the returned value should be quoted
+     *
+     * @return int|MDB2_Error id on success, a MDB2 error on failure
+     * @access public
+     */
+    function getBeforeID($table, $field = null, $ondemand = true, $quote = true)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if ($db->supports('auto_increment') !== true) {
+            $seq = $table.(empty($field) ? '' : '_'.$field);
+            $id = $db->nextID($seq, $ondemand);
+            if (!$quote || PEAR::isError($id)) {
+                return $id;
+            }
+            return $db->quote($id, 'integer');
+        } elseif (!$quote) {
+            return null;
+        }
+        return 'NULL';
+    }
+
+    // }}}
+    // {{{ getAfterID()
+
+    /**
+     * Returns the autoincrement ID if supported or $id
+     *
+     * @param mixed value as returned by getBeforeId()
+     * @param string name of the table into which a new row was inserted
+     * @param string name of the field into which a new row was inserted
+     *
+     * @return int|MDB2_Error id on success, a MDB2 error on failure
+     * @access public
+     */
+    function getAfterID($id, $table, $field = null)
+    {
+        $db =& $this->getDBInstance();
+        if (PEAR::isError($db)) {
+            return $db;
+        }
+
+        if ($db->supports('auto_increment') !== true) {
+            return $id;
+        }
+        return $db->lastInsertID($table, $field);
+    }
+
+    // }}}
+}
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/Iterator.php b/inc/MDB2/Iterator.php
new file mode 100755
index 00000000000..ca5e7b69c27
--- /dev/null
+++ b/inc/MDB2/Iterator.php
@@ -0,0 +1,259 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP version 5                                                        |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: Iterator.php,v 1.22 2006/05/06 14:03:41 lsmith Exp $
+
+/**
+ * PHP5 Iterator
+ *
+ * @package  MDB2
+ * @category Database
+ * @author   Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Iterator implements Iterator
+{
+    protected $fetchmode;
+    protected $result;
+    protected $row;
+
+    // {{{ constructor
+
+    /**
+     * Constructor
+     */
+    public function __construct($result, $fetchmode = MDB2_FETCHMODE_DEFAULT)
+    {
+        $this->result = $result;
+        $this->fetchmode = $fetchmode;
+    }
+    // }}}
+
+    // {{{ seek()
+
+    /**
+     * Seek forward to a specific row in a result set
+     *
+     * @param int number of the row where the data can be found
+     *
+     * @return void
+     * @access public
+     */
+    public function seek($rownum)
+    {
+        $this->row = null;
+        if ($this->result) {
+            $this->result->seek($rownum);
+        }
+    }
+    // }}}
+
+    // {{{ next()
+
+    /**
+     * Fetch next row of data
+     *
+     * @return void
+     * @access public
+     */
+    public function next()
+    {
+        $this->row = null;
+    }
+    // }}}
+
+    // {{{ current()
+
+    /**
+     * return a row of data
+     *
+     * @return void
+     * @access public
+     */
+    public function current()
+    {
+        if (is_null($this->row)) {
+            $row = $this->result->fetchRow($this->fetchmode);
+            if (PEAR::isError($row)) {
+                $row = false;
+            }
+            $this->row = $row;
+        }
+        return $this->row;
+    }
+    // }}}
+
+    // {{{ valid()
+
+    /**
+     * Check if the end of the result set has been reached
+     *
+     * @return bool true/false, false is also returned on failure
+     * @access public
+     */
+    public function valid()
+    {
+        return (bool)$this->current();
+    }
+    // }}}
+
+    // {{{ free()
+
+    /**
+     * Free the internal resources associated with result.
+     *
+     * @return bool|MDB2_Error true on success, false|MDB2_Error if result is invalid
+     * @access public
+     */
+    public function free()
+    {
+        if ($this->result) {
+            return $this->result->free();
+        }
+        $this->result = false;
+        $this->row = null;
+        return false;
+    }
+    // }}}
+
+    // {{{ key()
+
+    /**
+     * Returns the row number
+     *
+     * @return int|bool|MDB2_Error true on success, false|MDB2_Error if result is invalid
+     * @access public
+     */
+    public function key()
+    {
+        if ($this->result) {
+            return $this->result->rowCount();
+        }
+        return false;
+    }
+    // }}}
+
+    // {{{ rewind()
+
+    /**
+     * Seek to the first row in a result set
+     *
+     * @return void
+     * @access public
+     */
+    public function rewind()
+    {
+    }
+    // }}}
+
+    // {{{ destructor
+
+    /**
+     * Destructor
+     */
+    public function __destruct()
+    {
+        $this->free();
+    }
+    // }}}
+}
+
+/**
+ * PHP5 buffered Iterator
+ *
+ * @package  MDB2
+ * @category Database
+ * @author   Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_BufferedIterator extends MDB2_Iterator implements SeekableIterator
+{
+    // {{{ valid()
+
+    /**
+     * Check if the end of the result set has been reached
+     *
+     * @return bool|MDB2_Error true on success, false|MDB2_Error if result is invalid
+     * @access public
+     */
+    public function valid()
+    {
+        if ($this->result) {
+            return $this->result->valid();
+        }
+        return false;
+    }
+    // }}}
+
+    // {{{count()
+
+    /**
+     * Returns the number of rows in a result object
+     *
+     * @return int|MDB2_Error number of rows, false|MDB2_Error if result is invalid
+     * @access public
+     */
+    public function count()
+    {
+        if ($this->result) {
+            return $this->result->numRows();
+        }
+        return false;
+    }
+    // }}}
+
+    // {{{ rewind()
+
+    /**
+     * Seek to the first row in a result set
+     *
+     * @return void
+     * @access public
+     */
+    public function rewind()
+    {
+        $this->seek(0);
+    }
+    // }}}
+}
+
+?>
+\ No newline at end of file
diff --git a/inc/MDB2/LOB.php b/inc/MDB2/LOB.php
new file mode 100755
index 00000000000..69db267d69e
--- /dev/null
+++ b/inc/MDB2/LOB.php
@@ -0,0 +1,264 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP version 5                                                        |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: LOB.php,v 1.34 2006/10/25 11:52:21 lsmith Exp $
+
+/**
+ * @package  MDB2
+ * @category Database
+ * @author   Lukas Smith <smith@pooteeweet.org>
+ */
+
+require_once 'MDB2.php';
+
+/**
+ * MDB2_LOB: user land stream wrapper implementation for LOB support
+ *
+ * @package MDB2
+ * @category Database
+ * @author Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_LOB
+{
+    /**
+     * contains the key to the global MDB2 instance array of the associated
+     * MDB2 instance
+     *
+     * @var integer
+     * @access protected
+     */
+    var $db_index;
+
+    /**
+     * contains the key to the global MDB2_LOB instance array of the associated
+     * MDB2_LOB instance
+     *
+     * @var integer
+     * @access protected
+     */
+    var $lob_index;
+
+    // {{{ stream_open()
+
+    /**
+     * open stream
+     *
+     * @param string specifies the URL that was passed to fopen()
+     * @param string the mode used to open the file
+     * @param int holds additional flags set by the streams API
+     * @param string not used
+     *
+     * @return bool
+     * @access public
+     */
+    function stream_open($path, $mode, $options, &$opened_path)
+    {
+        if (!preg_match('/^rb?\+?$/', $mode)) {
+            return false;
+        }
+        $url = parse_url($path);
+        if (empty($url['host'])) {
+            return false;
+        }
+        $this->db_index = (int)$url['host'];
+        if (!isset($GLOBALS['_MDB2_databases'][$this->db_index])) {
+            return false;
+        }
+        $db =& $GLOBALS['_MDB2_databases'][$this->db_index];
+        $this->lob_index = (int)$url['user'];
+        if (!isset($db->datatype->lobs[$this->lob_index])) {
+            return false;
+        }
+        return true;
+    }
+    // }}}
+
+    // {{{ stream_read()
+
+    /**
+     * read stream
+     *
+     * @param int number of bytes to read
+     *
+     * @return string
+     * @access public
+     */
+    function stream_read($count)
+    {
+        if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) {
+            $db =& $GLOBALS['_MDB2_databases'][$this->db_index];
+            $db->datatype->_retrieveLOB($db->datatype->lobs[$this->lob_index]);
+
+            $data = $db->datatype->_readLOB($db->datatype->lobs[$this->lob_index], $count);
+            $length = strlen($data);
+            if ($length == 0) {
+                $db->datatype->lobs[$this->lob_index]['endOfLOB'] = true;
+            }
+            $db->datatype->lobs[$this->lob_index]['position'] += $length;
+            return $data;
+        }
+    }
+    // }}}
+
+    // {{{ stream_write()
+
+    /**
+     * write stream, note implemented
+     *
+     * @param string data
+     *
+     * @return int
+     * @access public
+     */
+    function stream_write($data)
+    {
+        return 0;
+    }
+    // }}}
+
+    // {{{ stream_tell()
+
+    /**
+     * return the current position
+     *
+     * @return int current position
+     * @access public
+     */
+    function stream_tell()
+    {
+        if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) {
+            $db =& $GLOBALS['_MDB2_databases'][$this->db_index];
+            return $db->datatype->lobs[$this->lob_index]['position'];
+        }
+    }
+    // }}}
+
+    // {{{ stream_eof()
+
+    /**
+     * Check if stream reaches EOF
+     *
+     * @return bool
+     * @access public
+     */
+    function stream_eof()
+    {
+        if (!isset($GLOBALS['_MDB2_databases'][$this->db_index])) {
+            return true;
+        }
+
+        $db =& $GLOBALS['_MDB2_databases'][$this->db_index];
+        $result = $db->datatype->_endOfLOB($db->datatype->lobs[$this->lob_index]);
+        if (version_compare(phpversion(), "5.0", ">=")
+            && version_compare(phpversion(), "5.1", "<")
+        ) {
+            return !$result;
+        }
+        return $result;
+    }
+    // }}}
+
+    // {{{ stream_seek()
+
+    /**
+     * Seek stream, not implemented
+     *
+     * @param int offset
+     * @param int whence
+     *
+     * @return bool
+     * @access public
+     */
+    function stream_seek($offset, $whence)
+    {
+        return false;
+    }
+    // }}}
+
+    // {{{ stream_stat()
+
+    /**
+     * return information about stream
+     *
+     * @access public
+     */
+    function stream_stat()
+    {
+        if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) {
+            $db =& $GLOBALS['_MDB2_databases'][$this->db_index];
+            return array(
+              'db_index' => $this->db_index,
+              'lob_index' => $this->lob_index,
+            );
+        }
+    }
+    // }}}
+
+    // {{{ stream_close()
+
+    /**
+     * close stream
+     *
+     * @access public
+     */
+    function stream_close()
+    {
+        if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) {
+            $db =& $GLOBALS['_MDB2_databases'][$this->db_index];
+            if (isset($db->datatype->lobs[$this->lob_index])) {
+                $db->datatype->_destroyLOB($db->datatype->lobs[$this->lob_index]);
+                unset($db->datatype->lobs[$this->lob_index]);
+            }
+        }
+    }
+    // }}}
+}
+
+// register streams wrapper
+if (!stream_wrapper_register("MDB2LOB", "MDB2_LOB")) {
+    MDB2::raiseError();
+    return false;
+}
+
+?>
author	Robin <robin@Amaya.(none)>	2010-05-04 03:21:57 +0200
committer	Robin <robin@Amaya.(none)>	2010-05-04 03:21:57 +0200
commit	ede1c64eddeb3abdde5b67da03be906bfba1b4cc (patch)
tree	dc9792f4a87718953b0ebafc945b7a70d64efa4c /inc/MDB2
parent	cd1ecef75fad711798eb2120b15a7e554a31654c (diff)
download	nextcloud-server-ede1c64eddeb3abdde5b67da03be906bfba1b4cc.tar.gz nextcloud-server-ede1c64eddeb3abdde5b67da03be906bfba1b4cc.zip