diff options
Diffstat (limited to '3rdparty/MDB2/Driver/pgsql.php')
| -rw-r--r-- | 3rdparty/MDB2/Driver/pgsql.php | 3065 |
1 files changed, 1547 insertions, 1518 deletions
diff --git a/3rdparty/MDB2/Driver/pgsql.php b/3rdparty/MDB2/Driver/pgsql.php index 13fea690680..15bd280f40b 100644 --- a/3rdparty/MDB2/Driver/pgsql.php +++ b/3rdparty/MDB2/Driver/pgsql.php @@ -1,1519 +1,1548 @@ -<?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; - } - $this->in_transaction = false; - return MDB2_OK; - } - - // }}} - // {{{ function setTransactionIsolation() - - /** - * Set the transacton isolation level. - * - * @param string standard isolation level - * READ UNCOMMITTED (allows dirty reads) - * READ COMMITTED (prevents dirty reads) - * REPEATABLE READ (prevents nonrepeatable reads) - * SERIALIZABLE (prevents phantom reads) - * @return mixed MDB2_OK on success, a MDB2 error on failure - * - * @access public - * @since 2.1.1 - */ - static function setTransactionIsolation($isolation, $options = array()) - { - $this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true)); - switch ($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; - } -} +<?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 295587 2010-02-28 17:16:38Z quipo $
+
+/**
+ * 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 (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);
+ }
+ if ($this->in_transaction) {
+ return MDB2_OK; //nothing to do
+ }
+ if (!$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 (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 (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;
+ }
+ $this->in_transaction = false;
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ function setTransactionIsolation()
+
+ /**
+ * Set the transacton isolation level.
+ *
+ * @param string standard isolation level
+ * READ UNCOMMITTED (allows dirty reads)
+ * READ COMMITTED (prevents dirty reads)
+ * REPEATABLE READ (prevents nonrepeatable reads)
+ * SERIALIZABLE (prevents phantom reads)
+ * @param array some transaction options:
+ * 'wait' => 'WAIT' | 'NO WAIT'
+ * 'rw' => 'READ WRITE' | 'READ ONLY'
+ *
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ *
+ * @access public
+ * @since 2.1.1
+ */
+ function setTransactionIsolation($isolation, $options = array())
+ {
+ $this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
+ switch ($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;
+ }
+ }
+
+ // Enable extra compatibility settings on 8.2 and later
+ if (function_exists('pg_parameter_status')) {
+ $version = pg_parameter_status($connection, 'server_version');
+ if ($version == false) {
+ return $this->raiseError(null, null, null,
+ 'Unable to retrieve server version', __FUNCTION__);
+ }
+ $version = explode ('.', $version);
+ if ( $version['0'] > 8
+ || ($version['0'] == 8 && $version['1'] >= 2)
+ ) {
+ if (!@pg_query($connection, "SET SESSION STANDARD_CONFORMING_STRINGS = OFF")) {
+ return $this->raiseError(null, null, null,
+ 'Unable to set standard_conforming_strings to off', __FUNCTION__);
+ }
+
+ if (!@pg_query($connection, "SET SESSION ESCAPE_STRING_WARNING = OFF")) {
+ return $this->raiseError(null, null, null,
+ 'Unable to set escape_string_warning to off', __FUNCTION__);
+ }
+ }
+ }
+
+ 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 (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 (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 (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']) {
+ return parent::prepare($query, $types, $result_types, $lobs);
+ }
+ $is_manip = ($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 (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 (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 (false === $pgtypes) {
+ $result = @pg_prepare($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 (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 (false === $this->result) {
+ $err = $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'resultset has already been freed', __FUNCTION__);
+ return $err;
+ }
+ 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 {
+ $rowObj = new $object_class($row);
+ $row = $rowObj;
+ }
+ }
+ ++$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 (null === $cols) {
+ if (false === $this->result) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'resultset has already been freed', __FUNCTION__);
+ }
+ if (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 (false === $free) {
+ 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 (false === $this->result) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'resultset has already been freed', __FUNCTION__);
+ }
+ if (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 (null === $rows) {
+ if (false === $this->result) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'resultset has already been freed', __FUNCTION__);
+ }
+ if (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 (null === $this->statement) {
+ return parent::_execute($result_class, $result_wrap_class);
+ }
+ $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 (null === $this->positions) {
+ return $this->db->raiseError(MDB2_ERROR, null, null,
+ 'Prepared statement has already been freed', __FUNCTION__);
+ }
+ $result = MDB2_OK;
+
+ if (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 |