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Diffstat (limited to 'inc/DB/sybase.php')
| -rwxr-xr-x | inc/DB/sybase.php | 907 |
1 files changed, 907 insertions, 0 deletions
diff --git a/inc/DB/sybase.php b/inc/DB/sybase.php new file mode 100755 index 00000000000..da0d2b705a7 --- /dev/null +++ b/inc/DB/sybase.php @@ -0,0 +1,907 @@ +<?php + +/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ + +/** + * The PEAR DB driver for PHP's sybase extension + * for interacting with Sybase databases + * + * PHP versions 4 and 5 + * + * LICENSE: This source file is subject to version 3.0 of the PHP license + * that is available through the world-wide-web at the following URI: + * http://www.php.net/license/3_0.txt. If you did not receive a copy of + * the PHP License and are unable to obtain it through the web, please + * send a note to license@php.net so we can mail you a copy immediately. + * + * @category Database + * @package DB + * @author Sterling Hughes <sterling@php.net> + * @author Antônio Carlos Venâncio Júnior <floripa@php.net> + * @author Daniel Convissor <danielc@php.net> + * @copyright 1997-2005 The PHP Group + * @license http://www.php.net/license/3_0.txt PHP License 3.0 + * @version CVS: $Id: sybase.php,v 1.78 2005/02/20 00:44:48 danielc Exp $ + * @link http://pear.php.net/package/DB + */ + +/** + * Obtain the DB_common class so it can be extended from + */ +require_once 'DB/common.php'; + +/** + * The methods PEAR DB uses to interact with PHP's sybase extension + * for interacting with Sybase databases + * + * These methods overload the ones declared in DB_common. + * + * WARNING: This driver may fail with multiple connections under the + * same user/pass/host and different databases. + * + * @category Database + * @package DB + * @author Sterling Hughes <sterling@php.net> + * @author Antônio Carlos Venâncio Júnior <floripa@php.net> + * @author Daniel Convissor <danielc@php.net> + * @copyright 1997-2005 The PHP Group + * @license http://www.php.net/license/3_0.txt PHP License 3.0 + * @version Release: @package_version@ + * @link http://pear.php.net/package/DB + */ +class DB_sybase extends DB_common +{ + // {{{ properties + + /** + * The DB driver type (mysql, oci8, odbc, etc.) + * @var string + */ + var $phptype = 'sybase'; + + /** + * The database syntax variant to be used (db2, access, etc.), if any + * @var string + */ + var $dbsyntax = 'sybase'; + + /** + * The capabilities of this DB implementation + * + * The 'new_link' element contains the PHP version that first provided + * new_link support for this DBMS. Contains false if it's unsupported. + * + * Meaning of the 'limit' element: + * + 'emulate' = emulate with fetch row by number + * + 'alter' = alter the query + * + false = skip rows + * + * @var array + */ + var $features = array( + 'limit' => 'emulate', + 'new_link' => false, + 'numrows' => true, + 'pconnect' => true, + 'prepare' => false, + 'ssl' => false, + 'transactions' => true, + ); + + /** + * A mapping of native error codes to DB error codes + * @var array + */ + var $errorcode_map = array( + ); + + /** + * The raw database connection created by PHP + * @var resource + */ + var $connection; + + /** + * The DSN information for connecting to a database + * @var array + */ + var $dsn = array(); + + + /** + * Should data manipulation queries be committed automatically? + * @var bool + * @access private + */ + var $autocommit = true; + + /** + * The quantity of transactions begun + * + * {@internal While this is private, it can't actually be designated + * private in PHP 5 because it is directly accessed in the test suite.}} + * + * @var integer + * @access private + */ + var $transaction_opcount = 0; + + /** + * The database specified in the DSN + * + * It's a fix to allow calls to different databases in the same script. + * + * @var string + * @access private + */ + var $_db = ''; + + + // }}} + // {{{ constructor + + /** + * This constructor calls <kbd>$this->DB_common()</kbd> + * + * @return void + */ + function DB_sybase() + { + $this->DB_common(); + } + + // }}} + // {{{ connect() + + /** + * Connect to the database server, log in and open the database + * + * Don't call this method directly. Use DB::connect() instead. + * + * PEAR DB's sybase driver supports the following extra DSN options: + * + appname The application name to use on this connection. + * Available since PEAR DB 1.7.0. + * + charset The character set to use on this connection. + * Available since PEAR DB 1.7.0. + * + * @param array $dsn the data source name + * @param bool $persistent should the connection be persistent? + * + * @return int DB_OK on success. A DB_Error object on failure. + */ + function connect($dsn, $persistent = false) + { + if (!PEAR::loadExtension('sybase') && + !PEAR::loadExtension('sybase_ct')) + { + return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); + } + + $this->dsn = $dsn; + if ($dsn['dbsyntax']) { + $this->dbsyntax = $dsn['dbsyntax']; + } + + $dsn['hostspec'] = $dsn['hostspec'] ? $dsn['hostspec'] : 'localhost'; + $dsn['password'] = !empty($dsn['password']) ? $dsn['password'] : false; + $dsn['charset'] = isset($dsn['charset']) ? $dsn['charset'] : false; + $dsn['appname'] = isset($dsn['appname']) ? $dsn['appname'] : false; + + $connect_function = $persistent ? 'sybase_pconnect' : 'sybase_connect'; + + if ($dsn['username']) { + $this->connection = @$connect_function($dsn['hostspec'], + $dsn['username'], + $dsn['password'], + $dsn['charset'], + $dsn['appname']); + } else { + return $this->raiseError(DB_ERROR_CONNECT_FAILED, + null, null, null, + 'The DSN did not contain a username.'); + } + + if (!$this->connection) { + return $this->raiseError(DB_ERROR_CONNECT_FAILED, + null, null, null, + @sybase_get_last_message()); + } + + if ($dsn['database']) { + if (!@sybase_select_db($dsn['database'], $this->connection)) { + return $this->raiseError(DB_ERROR_NODBSELECTED, + null, null, null, + @sybase_get_last_message()); + } + $this->_db = $dsn['database']; + } + + return DB_OK; + } + + // }}} + // {{{ disconnect() + + /** + * Disconnects from the database server + * + * @return bool TRUE on success, FALSE on failure + */ + function disconnect() + { + $ret = @sybase_close($this->connection); + $this->connection = null; + return $ret; + } + + // }}} + // {{{ simpleQuery() + + /** + * Sends a query to the database server + * + * @param string the SQL query string + * + * @return mixed + a PHP result resrouce for successful SELECT queries + * + the DB_OK constant for other successful queries + * + a DB_Error object on failure + */ + function simpleQuery($query) + { + $ismanip = DB::isManip($query); + $this->last_query = $query; + if (!@sybase_select_db($this->_db, $this->connection)) { + return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED); + } + $query = $this->modifyQuery($query); + if (!$this->autocommit && $ismanip) { + if ($this->transaction_opcount == 0) { + $result = @sybase_query('BEGIN TRANSACTION', $this->connection); + if (!$result) { + return $this->sybaseRaiseError(); + } + } + $this->transaction_opcount++; + } + $result = @sybase_query($query, $this->connection); + if (!$result) { + return $this->sybaseRaiseError(); + } + if (is_resource($result)) { + return $result; + } + // Determine which queries that should return data, and which + // should return an error code only. + return $ismanip ? DB_OK : $result; + } + + // }}} + // {{{ nextResult() + + /** + * Move the internal sybase result pointer to the next available result + * + * @param a valid sybase result resource + * + * @access public + * + * @return true if a result is available otherwise return false + */ + function nextResult($result) + { + return false; + } + + // }}} + // {{{ fetchInto() + + /** + * Places a row from the result set into the given array + * + * Formating of the array and the data therein are configurable. + * See DB_result::fetchInto() for more information. + * + * This method is not meant to be called directly. Use + * DB_result::fetchInto() instead. It can't be declared "protected" + * because DB_result is a separate object. + * + * @param resource $result the query result resource + * @param array $arr the referenced array to put the data in + * @param int $fetchmode how the resulting array should be indexed + * @param int $rownum the row number to fetch (0 = first row) + * + * @return mixed DB_OK on success, NULL when the end of a result set is + * reached or on failure + * + * @see DB_result::fetchInto() + */ + function fetchInto($result, &$arr, $fetchmode, $rownum = null) + { + if ($rownum !== null) { + if (!@sybase_data_seek($result, $rownum)) { + return null; + } + } + if ($fetchmode & DB_FETCHMODE_ASSOC) { + if (function_exists('sybase_fetch_assoc')) { + $arr = @sybase_fetch_assoc($result); + } else { + if ($arr = @sybase_fetch_array($result)) { + foreach ($arr as $key => $value) { + if (is_int($key)) { + unset($arr[$key]); + } + } + } + } + if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) { + $arr = array_change_key_case($arr, CASE_LOWER); + } + } else { + $arr = @sybase_fetch_row($result); + } + if (!$arr) { + return null; + } + if ($this->options['portability'] & DB_PORTABILITY_RTRIM) { + $this->_rtrimArrayValues($arr); + } + if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) { + $this->_convertNullArrayValuesToEmpty($arr); + } + return DB_OK; + } + + // }}} + // {{{ freeResult() + + /** + * Deletes the result set and frees the memory occupied by the result set + * + * This method is not meant to be called directly. Use + * DB_result::free() instead. It can't be declared "protected" + * because DB_result is a separate object. + * + * @param resource $result PHP's query result resource + * + * @return bool TRUE on success, FALSE if $result is invalid + * + * @see DB_result::free() + */ + function freeResult($result) + { + return @sybase_free_result($result); + } + + // }}} + // {{{ numCols() + + /** + * Gets the number of columns in a result set + * + * This method is not meant to be called directly. Use + * DB_result::numCols() instead. It can't be declared "protected" + * because DB_result is a separate object. + * + * @param resource $result PHP's query result resource + * + * @return int the number of columns. A DB_Error object on failure. + * + * @see DB_result::numCols() + */ + function numCols($result) + { + $cols = @sybase_num_fields($result); + if (!$cols) { + return $this->sybaseRaiseError(); + } + return $cols; + } + + // }}} + // {{{ numRows() + + /** + * Gets the number of rows in a result set + * + * This method is not meant to be called directly. Use + * DB_result::numRows() instead. It can't be declared "protected" + * because DB_result is a separate object. + * + * @param resource $result PHP's query result resource + * + * @return int the number of rows. A DB_Error object on failure. + * + * @see DB_result::numRows() + */ + function numRows($result) + { + $rows = @sybase_num_rows($result); + if ($rows === false) { + return $this->sybaseRaiseError(); + } + return $rows; + } + + // }}} + // {{{ affectedRows() + + /** + * Determines the number of rows affected by a data maniuplation query + * + * 0 is returned for queries that don't manipulate data. + * + * @return int the number of rows. A DB_Error object on failure. + */ + function affectedRows() + { + if (DB::isManip($this->last_query)) { + $result = @sybase_affected_rows($this->connection); + } else { + $result = 0; + } + return $result; + } + + // }}} + // {{{ nextId() + + /** + * Returns the next free id in a sequence + * + * @param string $seq_name name of the sequence + * @param boolean $ondemand when true, the seqence is automatically + * created if it does not exist + * + * @return int the next id number in the sequence. + * A DB_Error object on failure. + * + * @see DB_common::nextID(), DB_common::getSequenceName(), + * DB_sybase::createSequence(), DB_sybase::dropSequence() + */ + function nextId($seq_name, $ondemand = true) + { + $seqname = $this->getSequenceName($seq_name); + if (!@sybase_select_db($this->_db, $this->connection)) { + return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED); + } + $repeat = 0; + do { + $this->pushErrorHandling(PEAR_ERROR_RETURN); + $result = $this->query("INSERT INTO $seqname (vapor) VALUES (0)"); + $this->popErrorHandling(); + if ($ondemand && DB::isError($result) && + ($result->getCode() == DB_ERROR || $result->getCode() == DB_ERROR_NOSUCHTABLE)) + { + $repeat = 1; + $result = $this->createSequence($seq_name); + if (DB::isError($result)) { + return $this->raiseError($result); + } + } elseif (!DB::isError($result)) { + $result =& $this->query("SELECT @@IDENTITY FROM $seqname"); + $repeat = 0; + } else { + $repeat = false; + } + } while ($repeat); + if (DB::isError($result)) { + return $this->raiseError($result); + } + $result = $result->fetchRow(DB_FETCHMODE_ORDERED); + return $result[0]; + } + + /** + * Creates a new sequence + * + * @param string $seq_name name of the new sequence + * + * @return int DB_OK on success. A DB_Error object on failure. + * + * @see DB_common::createSequence(), DB_common::getSequenceName(), + * DB_sybase::nextID(), DB_sybase::dropSequence() + */ + function createSequence($seq_name) + { + return $this->query('CREATE TABLE ' + . $this->getSequenceName($seq_name) + . ' (id numeric(10, 0) IDENTITY NOT NULL,' + . ' vapor int NULL)'); + } + + // }}} + // {{{ dropSequence() + + /** + * Deletes a sequence + * + * @param string $seq_name name of the sequence to be deleted + * + * @return int DB_OK on success. A DB_Error object on failure. + * + * @see DB_common::dropSequence(), DB_common::getSequenceName(), + * DB_sybase::nextID(), DB_sybase::createSequence() + */ + function dropSequence($seq_name) + { + return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name)); + } + + // }}} + // {{{ autoCommit() + + /** + * Enables or disables automatic commits + * + * @param bool $onoff true turns it on, false turns it off + * + * @return int DB_OK on success. A DB_Error object if the driver + * doesn't support auto-committing transactions. + */ + function autoCommit($onoff = false) + { + // XXX if $this->transaction_opcount > 0, we should probably + // issue a warning here. + $this->autocommit = $onoff ? true : false; + return DB_OK; + } + + // }}} + // {{{ commit() + + /** + * Commits the current transaction + * + * @return int DB_OK on success. A DB_Error object on failure. + */ + function commit() + { + if ($this->transaction_opcount > 0) { + if (!@sybase_select_db($this->_db, $this->connection)) { + return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED); + } + $result = @sybase_query('COMMIT', $this->connection); + $this->transaction_opcount = 0; + if (!$result) { + return $this->sybaseRaiseError(); + } + } + return DB_OK; + } + + // }}} + // {{{ rollback() + + /** + * Reverts the current transaction + * + * @return int DB_OK on success. A DB_Error object on failure. + */ + function rollback() + { + if ($this->transaction_opcount > 0) { + if (!@sybase_select_db($this->_db, $this->connection)) { + return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED); + } + $result = @sybase_query('ROLLBACK', $this->connection); + $this->transaction_opcount = 0; + if (!$result) { + return $this->sybaseRaiseError(); + } + } + return DB_OK; + } + + // }}} + // {{{ sybaseRaiseError() + + /** + * Produces a DB_Error object regarding the current problem + * + * @param int $errno if the error is being manually raised pass a + * DB_ERROR* constant here. If this isn't passed + * the error information gathered from the DBMS. + * + * @return object the DB_Error object + * + * @see DB_common::raiseError(), + * DB_sybase::errorNative(), DB_sybase::errorCode() + */ + function sybaseRaiseError($errno = null) + { + $native = $this->errorNative(); + if ($errno === null) { + $errno = $this->errorCode($native); + } + return $this->raiseError($errno, null, null, null, $native); + } + + // }}} + // {{{ errorNative() + + /** + * Gets the DBMS' native error message produced by the last query + * + * @return string the DBMS' error message + */ + function errorNative() + { + return @sybase_get_last_message(); + } + + // }}} + // {{{ errorCode() + + /** + * Determines PEAR::DB error code from the database's text error message. + * + * @param string $errormsg error message returned from the database + * @return integer an error number from a DB error constant + */ + function errorCode($errormsg) + { + static $error_regexps; + if (!isset($error_regexps)) { + $error_regexps = array( + '/Incorrect syntax near/' + => DB_ERROR_SYNTAX, + '/^Unclosed quote before the character string [\"\'].*[\"\']\./' + => DB_ERROR_SYNTAX, + '/Implicit conversion (from datatype|of NUMERIC value)/i' + => DB_ERROR_INVALID_NUMBER, + '/Cannot drop the table [\"\'].+[\"\'], because it doesn\'t exist in the system catalogs\./' + => DB_ERROR_NOSUCHTABLE, + '/Only the owner of object [\"\'].+[\"\'] or a user with System Administrator \(SA\) role can run this command\./' + => DB_ERROR_ACCESS_VIOLATION, + '/^.+ permission denied on object .+, database .+, owner .+/' + => DB_ERROR_ACCESS_VIOLATION, + '/^.* permission denied, database .+, owner .+/' + => DB_ERROR_ACCESS_VIOLATION, + '/[^.*] not found\./' + => DB_ERROR_NOSUCHTABLE, + '/There is already an object named/' + => DB_ERROR_ALREADY_EXISTS, + '/Invalid column name/' + => DB_ERROR_NOSUCHFIELD, + '/does not allow null values/' + => DB_ERROR_CONSTRAINT_NOT_NULL, + '/Command has been aborted/' + => DB_ERROR_CONSTRAINT, + '/^Cannot drop the index .* because it doesn\'t exist/i' + => DB_ERROR_NOT_FOUND, + '/^There is already an index/i' + => DB_ERROR_ALREADY_EXISTS, + '/^There are fewer columns in the INSERT statement than values specified/i' + => DB_ERROR_VALUE_COUNT_ON_ROW, + ); + } + + foreach ($error_regexps as $regexp => $code) { + if (preg_match($regexp, $errormsg)) { + return $code; + } + } + return DB_ERROR; + } + + // }}} + // {{{ tableInfo() + + /** + * Returns information about a table or a result set + * + * NOTE: only supports 'table' and 'flags' if <var>$result</var> + * is a table name. + * + * @param object|string $result DB_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 $mode a valid tableInfo mode + * + * @return array an associative array with the information requested. + * A DB_Error object on failure. + * + * @see DB_common::tableInfo() + * @since Method available since Release 1.6.0 + */ + function tableInfo($result, $mode = null) + { + if (is_string($result)) { + /* + * Probably received a table name. + * Create a result resource identifier. + */ + if (!@sybase_select_db($this->_db, $this->connection)) { + return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED); + } + $id = @sybase_query("SELECT * FROM $result WHERE 1=0", + $this->connection); + $got_string = true; + } elseif (isset($result->result)) { + /* + * Probably received a result object. + * Extract the result resource identifier. + */ + $id = $result->result; + $got_string = false; + } else { + /* + * Probably received a result resource identifier. + * Copy it. + * Deprecated. Here for compatibility only. + */ + $id = $result; + $got_string = false; + } + + if (!is_resource($id)) { + return $this->sybaseRaiseError(DB_ERROR_NEED_MORE_DATA); + } + + if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) { + $case_func = 'strtolower'; + } else { + $case_func = 'strval'; + } + + $count = @sybase_num_fields($id); + $res = array(); + + if ($mode) { + $res['num_fields'] = $count; + } + + for ($i = 0; $i < $count; $i++) { + $f = @sybase_fetch_field($id, $i); + // column_source is often blank + $res[$i] = array( + 'table' => $got_string + ? $case_func($result) + : $case_func($f->column_source), + 'name' => $case_func($f->name), + 'type' => $f->type, + 'len' => $f->max_length, + 'flags' => '', + ); + if ($res[$i]['table']) { + $res[$i]['flags'] = $this->_sybase_field_flags( + $res[$i]['table'], $res[$i]['name']); + } + if ($mode & DB_TABLEINFO_ORDER) { + $res['order'][$res[$i]['name']] = $i; + } + if ($mode & DB_TABLEINFO_ORDERTABLE) { + $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i; + } + } + + // free the result only if we were called on a table + if ($got_string) { + @sybase_free_result($id); + } + return $res; + } + + // }}} + // {{{ _sybase_field_flags() + + /** + * Get the flags for a field + * + * Currently supports: + * + <samp>unique_key</samp> (unique index, unique check or primary_key) + * + <samp>multiple_key</samp> (multi-key index) + * + * @param string $table the table name + * @param string $column the field name + * + * @return string space delimited string of flags. Empty string if none. + * + * @access private + */ + function _sybase_field_flags($table, $column) + { + static $tableName = null; + static $flags = array(); + + if ($table != $tableName) { + $flags = array(); + $tableName = $table; + + // get unique/primary keys + $res = $this->getAll("sp_helpindex $table", DB_FETCHMODE_ASSOC); + + if (!isset($res[0]['index_description'])) { + return ''; + } + + foreach ($res as $val) { + $keys = explode(', ', trim($val['index_keys'])); + + if (sizeof($keys) > 1) { + foreach ($keys as $key) { + $this->_add_flag($flags[$key], 'multiple_key'); + } + } + + if (strpos($val['index_description'], 'unique')) { + foreach ($keys as $key) { + $this->_add_flag($flags[$key], 'unique_key'); + } + } + } + + } + + if (array_key_exists($column, $flags)) { + return(implode(' ', $flags[$column])); + } + + return ''; + } + + // }}} + // {{{ _add_flag() + + /** + * Adds a string to the flags array if the flag is not yet in there + * - if there is no flag present the array is created + * + * @param array $array reference of flags array to add a value to + * @param mixed $value value to add to the flag array + * + * @return void + * + * @access private + */ + function _add_flag(&$array, $value) + { + if (!is_array($array)) { + $array = array($value); + } elseif (!in_array($value, $array)) { + array_push($array, $value); + } + } + + // }}} + // {{{ getSpecialQuery() + + /** + * Obtains the query string needed for listing a given type of objects + * + * @param string $type the kind of objects you want to retrieve + * + * @return string the SQL query string or null if the driver doesn't + * support the object type requested + * + * @access protected + * @see DB_common::getListOf() + */ + function getSpecialQuery($type) + { + switch ($type) { + case 'tables': + return "SELECT name FROM sysobjects WHERE type = 'U'" + . ' ORDER BY name'; + case 'views': + return "SELECT name FROM sysobjects WHERE type = 'V'"; + default: + return null; + } + } + + // }}} + +} + +/* + * Local variables: + * tab-width: 4 + * c-basic-offset: 4 + * End: + */ + +?> |