- fixed #1485032 and updated MDB2 package+drivers

1 files changed, 1684 insertions, 1534 deletions

diff --git a/program/lib/MDB2/Driver/mysql.php b/program/lib/MDB2/Driver/mysql.php
index 1e0453936..96210e43b 100644
--- a/program/lib/MDB2/Driver/mysql.php
+++ b/program/lib/MDB2/Driver/mysql.php
@@ -1,1535 +1,1685 @@
-<?php

-// vim: set et ts=4 sw=4 fdm=marker:

-// +----------------------------------------------------------------------+

-// | PHP versions 4 and 5                                                 |

-// +----------------------------------------------------------------------+

-// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox,                 |

-// | Stig. S. Bakken, Lukas Smith                                         |

-// | All rights reserved.                                                 |

-// +----------------------------------------------------------------------+

-// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |

-// | API as well as database abstraction for PHP applications.            |

-// | This LICENSE is in the BSD license style.                            |

-// |                                                                      |

-// | Redistribution and use in source and binary forms, with or without   |

-// | modification, are permitted provided that the following conditions   |

-// | are met:                                                             |

-// |                                                                      |

-// | Redistributions of source code must retain the above copyright       |

-// | notice, this list of conditions and the following disclaimer.        |

-// |                                                                      |

-// | Redistributions in binary form must reproduce the above copyright    |

-// | notice, this list of conditions and the following disclaimer in the  |

-// | documentation and/or other materials provided with the distribution. |

-// |                                                                      |

-// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |

-// | Lukas Smith nor the names of his contributors may be used to endorse |

-// | or promote products derived from this software without specific prior|

-// | written permission.                                                  |

-// |                                                                      |

-// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |

-// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |

-// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |

-// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |

-// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |

-// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |

-// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|

-// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |

-// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |

-// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|

-// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |

-// | POSSIBILITY OF SUCH DAMAGE.                                          |

-// +----------------------------------------------------------------------+

-// | Author: Lukas Smith <smith@pooteeweet.org>                           |

-// +----------------------------------------------------------------------+

-//

-// $Id: mysql.php,v 1.195 2007/11/10 13:27:03 quipo Exp $

-//

-

-/**

- * MDB2 MySQL driver

- *

- * @package MDB2

- * @category Database

- * @author  Lukas Smith <smith@pooteeweet.org>

- */

-class MDB2_Driver_mysql extends MDB2_Driver_Common

-{

-    // {{{ properties

-

-    var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => '\\', 'escape_pattern' => '\\');

-

-    var $identifier_quoting = array('start' => '`', 'end' => '`', 'escape' => '`');

-

-    var $sql_comments = array(

-        array('start' => '-- ', 'end' => "\n", 'escape' => false),

-        array('start' => '#', 'end' => "\n", 'escape' => false),

-        array('start' => '/*', 'end' => '*/', 'escape' => false),

-    );

-

-    var $server_capabilities_checked = false;

-

-    var $start_transaction = false;

-

-    var $varchar_max_length = 255;

-

-    // }}}

-    // {{{ constructor

-

-    /**

-     * Constructor

-     */

-    function __construct()

-    {

-        parent::__construct();

-

-        $this->phptype = 'mysql';

-        $this->dbsyntax = 'mysql';

-

-        $this->supported['sequences'] = 'emulated';

-        $this->supported['indexes'] = true;

-        $this->supported['affected_rows'] = true;

-        $this->supported['transactions'] = false;

-        $this->supported['savepoints'] = false;

-        $this->supported['summary_functions'] = true;

-        $this->supported['order_by_text'] = true;

-        $this->supported['current_id'] = 'emulated';

-        $this->supported['limit_queries'] = true;

-        $this->supported['LOBs'] = true;

-        $this->supported['replace'] = true;

-        $this->supported['sub_selects'] = 'emulated';

-        $this->supported['auto_increment'] = true;

-        $this->supported['primary_key'] = true;

-        $this->supported['result_introspection'] = true;

-        $this->supported['prepared_statements'] = 'emulated';

-        $this->supported['identifier_quoting'] = true;

-        $this->supported['pattern_escaping'] = true;

-        $this->supported['new_link'] = true;

-

-        $this->options['default_table_type'] = '';

-    }

-

-    // }}}

-    // {{{ errorInfo()

-

-    /**

-     * This method is used to collect information about an error

-     *

-     * @param integer $error

-     * @return array

-     * @access public

-     */

-    function errorInfo($error = null)

-    {

-        if ($this->connection) {

-            $native_code = @mysql_errno($this->connection);

-            $native_msg  = @mysql_error($this->connection);

-        } else {

-            $native_code = @mysql_errno();

-            $native_msg  = @mysql_error();

-        }

-        if (is_null($error)) {

-            static $ecode_map;

-            if (empty($ecode_map)) {

-                $ecode_map = array(

-                    1000 => MDB2_ERROR_INVALID, //hashchk

-                    1001 => MDB2_ERROR_INVALID, //isamchk

-                    1004 => MDB2_ERROR_CANNOT_CREATE,

-                    1005 => MDB2_ERROR_CANNOT_CREATE,

-                    1006 => MDB2_ERROR_CANNOT_CREATE,

-                    1007 => MDB2_ERROR_ALREADY_EXISTS,

-                    1008 => MDB2_ERROR_CANNOT_DROP,

-                    1009 => MDB2_ERROR_CANNOT_DROP,

-                    1010 => MDB2_ERROR_CANNOT_DROP,

-                    1011 => MDB2_ERROR_CANNOT_DELETE,

-                    1022 => MDB2_ERROR_ALREADY_EXISTS,

-                    1029 => MDB2_ERROR_NOT_FOUND,

-                    1032 => MDB2_ERROR_NOT_FOUND,

-                    1044 => MDB2_ERROR_ACCESS_VIOLATION,

-                    1045 => MDB2_ERROR_ACCESS_VIOLATION,

-                    1046 => MDB2_ERROR_NODBSELECTED,

-                    1048 => MDB2_ERROR_CONSTRAINT,

-                    1049 => MDB2_ERROR_NOSUCHDB,

-                    1050 => MDB2_ERROR_ALREADY_EXISTS,

-                    1051 => MDB2_ERROR_NOSUCHTABLE,

-                    1054 => MDB2_ERROR_NOSUCHFIELD,

-                    1060 => MDB2_ERROR_ALREADY_EXISTS,

-                    1061 => MDB2_ERROR_ALREADY_EXISTS,

-                    1062 => MDB2_ERROR_ALREADY_EXISTS,

-                    1064 => MDB2_ERROR_SYNTAX,

-                    1067 => MDB2_ERROR_INVALID,

-                    1072 => MDB2_ERROR_NOT_FOUND,

-                    1086 => MDB2_ERROR_ALREADY_EXISTS,

-                    1091 => MDB2_ERROR_NOT_FOUND,

-                    1100 => MDB2_ERROR_NOT_LOCKED,

-                    1109 => MDB2_ERROR_NOT_FOUND,

-                    1125 => MDB2_ERROR_ALREADY_EXISTS,

-                    1136 => MDB2_ERROR_VALUE_COUNT_ON_ROW,

-                    1138 => MDB2_ERROR_INVALID,

-                    1142 => MDB2_ERROR_ACCESS_VIOLATION,

-                    1143 => MDB2_ERROR_ACCESS_VIOLATION,

-                    1146 => MDB2_ERROR_NOSUCHTABLE,

-                    1149 => MDB2_ERROR_SYNTAX,

-                    1169 => MDB2_ERROR_CONSTRAINT,

-                    1176 => MDB2_ERROR_NOT_FOUND,

-                    1177 => MDB2_ERROR_NOSUCHTABLE,

-                    1213 => MDB2_ERROR_DEADLOCK,

-                    1216 => MDB2_ERROR_CONSTRAINT,

-                    1217 => MDB2_ERROR_CONSTRAINT,

-                    1227 => MDB2_ERROR_ACCESS_VIOLATION,

-                    1299 => MDB2_ERROR_INVALID_DATE,

-                    1300 => MDB2_ERROR_INVALID,

-                    1304 => MDB2_ERROR_ALREADY_EXISTS,

-                    1305 => MDB2_ERROR_NOT_FOUND,

-                    1306 => MDB2_ERROR_CANNOT_DROP,

-                    1307 => MDB2_ERROR_CANNOT_CREATE,

-                    1334 => MDB2_ERROR_CANNOT_ALTER,

-                    1339 => MDB2_ERROR_NOT_FOUND,

-                    1356 => MDB2_ERROR_INVALID,

-                    1359 => MDB2_ERROR_ALREADY_EXISTS,

-                    1360 => MDB2_ERROR_NOT_FOUND,

-                    1363 => MDB2_ERROR_NOT_FOUND,

-                    1365 => MDB2_ERROR_DIVZERO,

-                    1451 => MDB2_ERROR_CONSTRAINT,

-                    1452 => MDB2_ERROR_CONSTRAINT,

-                    1542 => MDB2_ERROR_CANNOT_DROP,

-                    1546 => MDB2_ERROR_CONSTRAINT,

-                    1582 => MDB2_ERROR_CONSTRAINT,

-                );

-            }

-            if ($this->options['portability'] & MDB2_PORTABILITY_ERRORS) {

-                $ecode_map[1022] = MDB2_ERROR_CONSTRAINT;

-                $ecode_map[1048] = MDB2_ERROR_CONSTRAINT_NOT_NULL;

-                $ecode_map[1062] = MDB2_ERROR_CONSTRAINT;

-            } else {

-                // Doing this in case mode changes during runtime.

-                $ecode_map[1022] = MDB2_ERROR_ALREADY_EXISTS;

-                $ecode_map[1048] = MDB2_ERROR_CONSTRAINT;

-                $ecode_map[1062] = MDB2_ERROR_ALREADY_EXISTS;

-            }

-            if (isset($ecode_map[$native_code])) {

-                $error = $ecode_map[$native_code];

-            }

-        }

-        return array($error, $native_code, $native_msg);

-    }

-

-    // }}}

-    // {{{ escape()

-

-    /**

-     * Quotes a string so it can be safely used in a query. It will quote

-     * the text so it can safely be used within a query.

-     *

-     * @param   string  the input string to quote

-     * @param   bool    escape wildcards

-     *

-     * @return  string  quoted string

-     *

-     * @access  public

-     */

-    function escape($text, $escape_wildcards = false)

-    {

-        if ($escape_wildcards) {

-            $text = $this->escapePattern($text);

-        }

-        $connection = $this->getConnection();

-        if (PEAR::isError($connection)) {

-            return $connection;

-        }

-        $text = @mysql_real_escape_string($text, $connection);

-        return $text;

-    }

-

-    // }}}

-    // {{{ beginTransaction()

-

-    /**

-     * Start a transaction or set a savepoint.

-     *

-     * @param   string  name of a savepoint to set

-     * @return  mixed   MDB2_OK on success, a MDB2 error on failure

-     *

-     * @access  public

-     */

-    function beginTransaction($savepoint = null)

-    {

-        $this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));

-        $this->_getServerCapabilities();

-        if (!is_null($savepoint)) {

-            if (!$this->supports('savepoints')) {

-                return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,

-                    'savepoints are not supported', __FUNCTION__);

-            }

-            if (!$this->in_transaction) {

-                return $this->raiseError(MDB2_ERROR_INVALID, null, null,

-                    'savepoint cannot be released when changes are auto committed', __FUNCTION__);

-            }

-            $query = 'SAVEPOINT '.$savepoint;

-            return $this->_doQuery($query, true);

-        } elseif ($this->in_transaction) {

-            return MDB2_OK;  //nothing to do

-        }

-        if (!$this->destructor_registered && $this->opened_persistent) {

-            $this->destructor_registered = true;

-            register_shutdown_function('MDB2_closeOpenTransactions');

-        }

-        $query = $this->start_transaction ? 'START TRANSACTION' : 'SET AUTOCOMMIT = 1';

-        $result =& $this->_doQuery($query, true);

-        if (PEAR::isError($result)) {

-            return $result;

-        }

-        $this->in_transaction = true;

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ commit()

-

-    /**

-     * Commit the database changes done during a transaction that is in

-     * progress or release a savepoint. This function may only be called when

-     * auto-committing is disabled, otherwise it will fail. Therefore, a new

-     * transaction is implicitly started after committing the pending changes.

-     *

-     * @param   string  name of a savepoint to release

-     * @return  mixed   MDB2_OK on success, a MDB2 error on failure

-     *

-     * @access  public

-     */

-    function commit($savepoint = null)

-    {

-        $this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));

-        if (!$this->in_transaction) {

-            return $this->raiseError(MDB2_ERROR_INVALID, null, null,

-                'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);

-        }

-        if (!is_null($savepoint)) {

-            if (!$this->supports('savepoints')) {

-                return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,

-                    'savepoints are not supported', __FUNCTION__);

-            }

-            $server_info = $this->getServerVersion();

-            if (version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '5.0.3', '<')) {

-                return MDB2_OK;

-            }

-            $query = 'RELEASE SAVEPOINT '.$savepoint;

-            return $this->_doQuery($query, true);

-        }

-

-        if (!$this->supports('transactions')) {

-            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,

-                'transactions are not supported', __FUNCTION__);

-        }

-

-        $result =& $this->_doQuery('COMMIT', true);

-        if (PEAR::isError($result)) {

-            return $result;

-        }

-        if (!$this->start_transaction) {

-            $query = 'SET AUTOCOMMIT = 0';

-            $result =& $this->_doQuery($query, true);

-            if (PEAR::isError($result)) {

-                return $result;

-            }

-        }

-        $this->in_transaction = false;

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ rollback()

-

-    /**

-     * Cancel any database changes done during a transaction or since a specific

-     * savepoint that is in progress. This function may only be called when

-     * auto-committing is disabled, otherwise it will fail. Therefore, a new

-     * transaction is implicitly started after canceling the pending changes.

-     *

-     * @param   string  name of a savepoint to rollback to

-     * @return  mixed   MDB2_OK on success, a MDB2 error on failure

-     *

-     * @access  public

-     */

-    function rollback($savepoint = null)

-    {

-        $this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));

-        if (!$this->in_transaction) {

-            return $this->raiseError(MDB2_ERROR_INVALID, null, null,

-                'rollback cannot be done changes are auto committed', __FUNCTION__);

-        }

-        if (!is_null($savepoint)) {

-            if (!$this->supports('savepoints')) {

-                return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,

-                    'savepoints are not supported', __FUNCTION__);

-            }

-            $query = 'ROLLBACK TO SAVEPOINT '.$savepoint;

-            return $this->_doQuery($query, true);

-        }

-

-        $query = 'ROLLBACK';

-        $result =& $this->_doQuery($query, true);

-        if (PEAR::isError($result)) {

-            return $result;

-        }

-        if (!$this->start_transaction) {

-            $query = 'SET AUTOCOMMIT = 0';

-            $result =& $this->_doQuery($query, true);

-            if (PEAR::isError($result)) {

-                return $result;

-            }

-        }

-        $this->in_transaction = false;

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ function setTransactionIsolation()

-

-    /**

-     * Set the transacton isolation level.

-     *

-     * @param   string  standard isolation level

-     *                  READ UNCOMMITTED (allows dirty reads)

-     *                  READ COMMITTED (prevents dirty reads)

-     *                  REPEATABLE READ (prevents nonrepeatable reads)

-     *                  SERIALIZABLE (prevents phantom reads)

-     * @return  mixed   MDB2_OK on success, a MDB2 error on failure

-     *

-     * @access  public

-     * @since   2.1.1

-     */

-    function setTransactionIsolation($isolation)

-    {

-        $this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));

-        if (!$this->supports('transactions')) {

-            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,

-                'transactions are not supported', __FUNCTION__);

-        }

-        switch ($isolation) {

-        case 'READ UNCOMMITTED':

-        case 'READ COMMITTED':

-        case 'REPEATABLE READ':

-        case 'SERIALIZABLE':

-            break;

-        default:

-            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,

-                'isolation level is not supported: '.$isolation, __FUNCTION__);

-        }

-

-        $query = "SET SESSION TRANSACTION ISOLATION LEVEL $isolation";

-        return $this->_doQuery($query, true);

-    }

-

-    // }}}

-    // {{{ connect()

-

-    /**

-     * Connect to the database

-     *

-     * @return true on success, MDB2 Error Object on failure

-     */

-    function connect()

-    {

-        if (is_resource($this->connection)) {

-            //if (count(array_diff($this->connected_dsn, $this->dsn)) == 0

-            if (MDB2::areEquals($this->connected_dsn, $this->dsn)

-                && $this->opened_persistent == $this->options['persistent']

-                && $this->connected_database_name == $this->database_name

-            ) {

-                return MDB2_OK;

-            }

-            $this->disconnect(false);

-        }

-

-        if (!PEAR::loadExtension($this->phptype)) {

-            return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,

-                'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);

-        }

-

-        $params = array();

-        if ($this->dsn['protocol'] && $this->dsn['protocol'] == 'unix') {

-            $params[0] = ':' . $this->dsn['socket'];

-        } else {

-            $params[0] = $this->dsn['hostspec'] ? $this->dsn['hostspec']

-                         : 'localhost';

-            if ($this->dsn['port']) {

-                $params[0].= ':' . $this->dsn['port'];

-            }

-        }

-        $params[] = $this->dsn['username'] ? $this->dsn['username'] : null;

-        $params[] = $this->dsn['password'] ? $this->dsn['password'] : null;

-        if (!$this->options['persistent']) {

-            if (isset($this->dsn['new_link'])

-                && ($this->dsn['new_link'] == 'true' || $this->dsn['new_link'] === true)

-            ) {

-                $params[] = true;

-            } else {

-                $params[] = false;

-            }

-        }

-        if (version_compare(phpversion(), '4.3.0', '>=')) {

-            $params[] = isset($this->dsn['client_flags'])

-                ? $this->dsn['client_flags'] : null;

-        }

-        $connect_function = $this->options['persistent'] ? 'mysql_pconnect' : 'mysql_connect';

-

-        $connection = @call_user_func_array($connect_function, $params);

-        if (!$connection) {

-            if (($err = @mysql_error()) != '') {

-                return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,

-                    $err, __FUNCTION__);

-            } else {

-                return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,

-                    'unable to establish a connection', __FUNCTION__);

-            }

-        }

-

-        if (!empty($this->dsn['charset'])) {

-            $result = $this->setCharset($this->dsn['charset'], $connection);

-            if (PEAR::isError($result)) {

-                return $result;

-            }

-        }

-

-        $this->connection = $connection;

-        $this->connected_dsn = $this->dsn;

-        $this->connected_database_name = '';

-        $this->opened_persistent = $this->options['persistent'];

-        $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;

-

-        if ($this->database_name) {

-            if ($this->database_name != $this->connected_database_name) {

-                if (!@mysql_select_db($this->database_name, $connection)) {

-                    $err = $this->raiseError(null, null, null,

-                        'Could not select the database: '.$this->database_name, __FUNCTION__);

-                    return $err;

-                }

-                $this->connected_database_name = $this->database_name;

-            }

-        }

-

-        $this->supported['transactions'] = $this->options['use_transactions'];

-        if ($this->options['default_table_type']) {

-            switch (strtoupper($this->options['default_table_type'])) {

-            case 'BLACKHOLE':

-            case 'MEMORY':

-            case 'ARCHIVE':

-            case 'CSV':

-            case 'HEAP':

-            case 'ISAM':

-            case 'MERGE':

-            case 'MRG_ISAM':

-            case 'ISAM':

-            case 'MRG_MYISAM':

-            case 'MYISAM':

-                $this->supported['transactions'] = false;

-                $this->warnings[] = $this->options['default_table_type'] .

-                    ' is not a supported default table type';

-                break;

-            }

-        }

-        

-        $this->_getServerCapabilities();

-

-        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;

-            }

-        }

-        $query = "SET NAMES '".mysql_real_escape_string($charset, $connection)."'";

-        return $this->_doQuery($query, true, $connection);

-    }

-

-    // }}}

-    // {{{ 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) {

-                @mysql_close($this->connection);

-            }

-        }

-        return parent::disconnect($force);

-    }

-

-    // }}}

-    // {{{ _doQuery()

-

-    /**

-     * Execute a query

-     * @param string $query  query

-     * @param boolean $is_manip  if the query is a manipulation query

-     * @param resource $connection

-     * @param string $database_name

-     * @return result or error object

-     * @access protected

-     */

-    function &_doQuery($query, $is_manip = false, $connection = null, $database_name = null)

-    {

-        $this->last_query = $query;

-        $result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));

-        if ($result) {

-            if (PEAR::isError($result)) {

-                return $result;

-            }

-            $query = $result;

-        }

-        if ($this->options['disable_query']) {

-            $result = $is_manip ? 0 : null;

-            return $result;

-        }

-

-        if (is_null($connection)) {

-            $connection = $this->getConnection();

-            if (PEAR::isError($connection)) {

-                return $connection;

-            }

-        }

-        if (is_null($database_name)) {

-            $database_name = $this->database_name;

-        }

-

-        if ($database_name) {

-            if ($database_name != $this->connected_database_name) {

-                if (!@mysql_select_db($database_name, $connection)) {

-                    $err = $this->raiseError(null, null, null,

-                        'Could not select the database: '.$database_name, __FUNCTION__);

-                    return $err;

-                }

-                $this->connected_database_name = $database_name;

-            }

-        }

-

-        $function = $this->options['result_buffering']

-            ? 'mysql_query' : 'mysql_unbuffered_query';

-        $result = @$function($query, $connection);

-        if (!$result) {

-            $err =& $this->raiseError(null, null, null,

-                'Could not execute statement', __FUNCTION__);

-            return $err;

-        }

-

-        $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));

-        return $result;

-    }

-

-    // }}}

-    // {{{ _affectedRows()

-

-    /**

-     * Returns the number of rows affected

-     *

-     * @param resource $result

-     * @param resource $connection

-     * @return mixed MDB2 Error Object or the number of rows affected

-     * @access private

-     */

-    function _affectedRows($connection, $result = null)

-    {

-        if (is_null($connection)) {

-            $connection = $this->getConnection();

-            if (PEAR::isError($connection)) {

-                return $connection;

-            }

-        }

-        return @mysql_affected_rows($connection);

-    }

-

-    // }}}

-    // {{{ _modifyQuery()

-

-    /**

-     * Changes a query string for various DBMS specific reasons

-     *

-     * @param string $query  query to modify

-     * @param boolean $is_manip  if it is a DML query

-     * @param integer $limit  limit the number of rows

-     * @param integer $offset  start reading from given offset

-     * @return string modified query

-     * @access protected

-     */

-    function _modifyQuery($query, $is_manip, $limit, $offset)

-    {

-        if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) {

-            // "DELETE FROM table" gives 0 affected rows in MySQL.

-            // This little hack lets you know how many rows were deleted.

-            if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {

-                $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',

-                                      'DELETE FROM \1 WHERE 1=1', $query);

-            }

-        }

-        if ($limit > 0

-            && !preg_match('/LIMIT\s*\d(?:\s*(?:,|OFFSET)\s*\d+)?(?:[^\)]*)?$/i', $query)

-        ) {

-            $query = rtrim($query);

-            if (substr($query, -1) == ';') {

-                $query = substr($query, 0, -1);

-            }

-

-            // LIMIT doesn't always come last in the query

-            // @see http://dev.mysql.com/doc/refman/5.0/en/select.html

-            $after = '';

-            if (preg_match('/(\s+INTO\s+(?:OUT|DUMP)FILE\s.*)$/ims', $query, $matches)) {

-                $after = $matches[0];

-                $query = preg_replace('/(\s+INTO\s+(?:OUT|DUMP)FILE\s.*)$/ims', '', $query);

-            } elseif (preg_match('/(\s+FOR\s+UPDATE\s*)$/i', $query, $matches)) {

-               $after = $matches[0];

-               $query = preg_replace('/(\s+FOR\s+UPDATE\s*)$/im', '', $query);

-            } elseif (preg_match('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', $query, $matches)) {

-               $after = $matches[0];

-               $query = preg_replace('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', '', $query);

-            }

-

-            if ($is_manip) {

-                return $query . " LIMIT $limit" . $after;

-            } else {

-                return $query . " LIMIT $offset, $limit" . $after;

-            }

-        }

-        return $query;

-    }

-

-    // }}}

-    // {{{ getServerVersion()

-

-    /**

-     * return version information about the server

-     *

-     * @param bool   $native  determines if the raw version string should be returned

-     * @return mixed array/string with version information or MDB2 error object

-     * @access public

-     */

-    function getServerVersion($native = false)

-    {

-        $connection = $this->getConnection();

-        if (PEAR::isError($connection)) {

-            return $connection;

-        }

-        if ($this->connected_server_info) {

-            $server_info = $this->connected_server_info;

-        } else {

-            $server_info = @mysql_get_server_info($connection);

-        }

-        if (!$server_info) {

-            return $this->raiseError(null, null, null,

-                'Could not get server information', __FUNCTION__);

-        }

-        // cache server_info

-        $this->connected_server_info = $server_info;

-        if (!$native) {

-            $tmp = explode('.', $server_info, 3);

-            if (isset($tmp[2]) && strpos($tmp[2], '-')) {

-                $tmp2 = explode('-', @$tmp[2], 2);

-            } else {

-                $tmp2[0] = isset($tmp[2]) ? $tmp[2] : null;

-                $tmp2[1] = null;

-            }

-            $server_info = array(

-                'major' => isset($tmp[0]) ? $tmp[0] : null,

-                'minor' => isset($tmp[1]) ? $tmp[1] : null,

-                'patch' => $tmp2[0],

-                'extra' => $tmp2[1],

-                'native' => $server_info,

-            );

-        }

-        return $server_info;

-    }

-

-    // }}}

-    // {{{ _getServerCapabilities()

-

-    /**

-     * Fetch some information about the server capabilities

-     * (transactions, subselects, prepared statements, etc).

-     *

-     * @access private

-     */

-    function _getServerCapabilities()

-    {

-        if (!$this->server_capabilities_checked) {

-            $this->server_capabilities_checked = true;

-

-            //set defaults

-            $this->supported['sub_selects'] = 'emulated';

-            $this->supported['prepared_statements'] = 'emulated';

-            $this->start_transaction = false;

-            $this->varchar_max_length = 255;

-            

-            $server_info = $this->getServerVersion();

-            if (is_array($server_info)) {

-                if (!version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '4.1.0', '<')) {

-                    $this->supported['sub_selects'] = true;

-                    $this->supported['prepared_statements'] = true;

-                }

-

-                if (!version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '4.0.14', '<')

-                    || !version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '4.1.1', '<')

-                ) {

-                    $this->supported['savepoints'] = true;

-                }

-

-                if (!version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '4.0.11', '<')) {

-                    $this->start_transaction = true;

-                }

-

-                if (!version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '5.0.3', '<')) {

-                    $this->varchar_max_length = 65532;

-                }

-            }

-        }

-    }

-

-    // }}}

-    // {{{ function _skipUserDefinedVariable($query, $position)

-

-    /**

-     * Utility method, used by prepare() to avoid misinterpreting MySQL user 

-     * defined variables (SELECT @x:=5) for placeholders.

-     * Check if the placeholder is a false positive, i.e. if it is an user defined

-     * variable instead. If so, skip it and advance the position, otherwise

-     * return the current position, which is valid

-     *

-     * @param string $query

-     * @param integer $position current string cursor position

-     * @return integer $new_position

-     * @access protected

-     */

-    function _skipUserDefinedVariable($query, $position)

-    {

-        $found = strpos(strrev(substr($query, 0, $position)), '@');

-        if ($found === false) {

-            return $position;

-        }

-        $pos = strlen($query) - strlen(substr($query, $position)) - $found - 1;

-        $substring = substr($query, $pos, $position - $pos + 2);

-        if (preg_match('/^@\w+\s*:=$/', $substring)) {

-            return $position + 1; //found an user defined variable: skip it

-        }

-        return $position;

-    }

-

-    // }}}

-    // {{{ prepare()

-

-    /**

-     * Prepares a query for multiple execution with execute().

-     * With some database backends, this is emulated.

-     * prepare() requires a generic query as string like

-     * 'INSERT INTO numbers VALUES(?,?)' or

-     * 'INSERT INTO numbers VALUES(:foo,:bar)'.

-     * The ? and :name and are placeholders which can be set using

-     * bindParam() and the query can be sent off using the execute() method.

-     * The allowed format for :name can be set with the 'bindname_format' option.

-     *

-     * @param string $query the query to prepare

-     * @param mixed   $types  array that contains the types of the placeholders

-     * @param mixed   $result_types  array that contains the types of the columns in

-     *                        the result set or MDB2_PREPARE_RESULT, if set to

-     *                        MDB2_PREPARE_MANIP the query is handled as a manipulation query

-     * @param mixed   $lobs   key (field) value (parameter) pair for all lob placeholders

-     * @return mixed resource handle for the prepared query on success, a MDB2

-     *        error on failure

-     * @access public

-     * @see bindParam, execute

-     */

-    function &prepare($query, $types = null, $result_types = null, $lobs = array())

-    {

-        if ($this->options['emulate_prepared']

-            || $this->supported['prepared_statements'] !== true

-        ) {

-            $obj =& parent::prepare($query, $types, $result_types, $lobs);

-            return $obj;

-        }

-        $is_manip = ($result_types === MDB2_PREPARE_MANIP);

-        $offset = $this->offset;

-        $limit = $this->limit;

-        $this->offset = $this->limit = 0;

-        $query = $this->_modifyQuery($query, $is_manip, $limit, $offset);

-        $result = $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'pre'));

-        if ($result) {

-            if (PEAR::isError($result)) {

-                return $result;

-            }

-            $query = $result;

-        }

-        $placeholder_type_guess = $placeholder_type = null;

-        $question = '?';

-        $colon = ':';

-        $positions = array();

-        $position = 0;

-        while ($position < strlen($query)) {

-            $q_position = strpos($query, $question, $position);

-            $c_position = strpos($query, $colon, $position);

-            if ($q_position && $c_position) {

-                $p_position = min($q_position, $c_position);

-            } elseif ($q_position) {

-                $p_position = $q_position;

-            } elseif ($c_position) {

-                $p_position = $c_position;

-            } else {

-                break;

-            }

-            if (is_null($placeholder_type)) {

-                $placeholder_type_guess = $query[$p_position];

-            }

-            

-            $new_pos = $this->_skipDelimitedStrings($query, $position, $p_position);

-            if (PEAR::isError($new_pos)) {

-                return $new_pos;

-            }

-            if ($new_pos != $position) {

-                $position = $new_pos;

-                continue; //evaluate again starting from the new position

-            }

-            

-            //make sure this is not part of an user defined variable

-            $new_pos = $this->_skipUserDefinedVariable($query, $position);

-            if ($new_pos != $position) {

-                $position = $new_pos;

-                continue; //evaluate again starting from the new position

-            }

-

-            if ($query[$position] == $placeholder_type_guess) {

-                if (is_null($placeholder_type)) {

-                    $placeholder_type = $query[$p_position];

-                    $question = $colon = $placeholder_type;

-                }

-                if ($placeholder_type == ':') {

-                    $regexp = '/^.{'.($position+1).'}('.$this->options['bindname_format'].').*$/s';

-                    $parameter = preg_replace($regexp, '\\1', $query);

-                    if ($parameter === '') {

-                        $err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,

-                            'named parameter name must match "bindname_format" option', __FUNCTION__);

-                        return $err;

-                    }

-                    $positions[$p_position] = $parameter;

-                    $query = substr_replace($query, '?', $position, strlen($parameter)+1);

-                } else {

-                    $positions[$p_position] = count($positions);

-                }

-                $position = $p_position + 1;

-            } else {

-                $position = $p_position;

-            }

-        }

-        $connection = $this->getConnection();

-        if (PEAR::isError($connection)) {

-            return $connection;

-        }

-        static $prep_statement_counter = 1;

-        $statement_name = sprintf($this->options['statement_format'], $this->phptype, sha1(microtime() + mt_rand())) . $prep_statement_counter++;

-        $query = "PREPARE $statement_name FROM ".$this->quote($query, 'text');

-        $statement =& $this->_doQuery($query, true, $connection);

-        if (PEAR::isError($statement)) {

-            return $statement;

-        }

-

-        $class_name = 'MDB2_Statement_'.$this->phptype;

-        $obj = new $class_name($this, $statement_name, $positions, $query, $types, $result_types, $is_manip, $limit, $offset);

-        $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'post', 'result' => $obj));

-        return $obj;

-    }

-

-    // }}}

-    // {{{ replace()

-

-    /**

-     * Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT

-     * query, except that if there is already a row in the table with the same

-     * key field values, the REPLACE query just updates its values instead of

-     * inserting a new row.

-     *

-     * The REPLACE type of query does not make part of the SQL standards. Since

-     * practically only MySQL implements it natively, this type of query is

-     * emulated through this method for other DBMS using standard types of

-     * queries inside a transaction to assure the atomicity of the operation.

-     *

-     * @access public

-     *

-     * @param string $table name of the table on which the REPLACE query will

-     *  be executed.

-     * @param array $fields associative array that describes the fields and the

-     *  values that will be inserted or updated in the specified table. The

-     *  indexes of the array are the names of all the fields of the table. The

-     *  values of the array are also associative arrays that describe the

-     *  values and other properties of the table fields.

-     *

-     *  Here follows a list of field properties that need to be specified:

-     *

-     *    value:

-     *          Value to be assigned to the specified field. This value may be

-     *          of specified in database independent type format as this

-     *          function can perform the necessary datatype conversions.

-     *

-     *    Default:

-     *          this property is required unless the Null property

-     *          is set to 1.

-     *

-     *    type

-     *          Name of the type of the field. Currently, all types Metabase

-     *          are supported except for clob and blob.

-     *

-     *    Default: no type conversion

-     *

-     *    null

-     *          Boolean property that indicates that the value for this field

-     *          should be set to null.

-     *

-     *          The default value for fields missing in INSERT queries may be

-     *          specified the definition of a table. Often, the default value

-     *          is already null, but since the REPLACE may be emulated using

-     *          an UPDATE query, make sure that all fields of the table are

-     *          listed in this function argument array.

-     *

-     *    Default: 0

-     *

-     *    key

-     *          Boolean property that indicates that this field should be

-     *          handled as a primary key or at least as part of the compound

-     *          unique index of the table that will determine the row that will

-     *          updated if it exists or inserted a new row otherwise.

-     *

-     *          This function will fail if no key field is specified or if the

-     *          value of a key field is set to null because fields that are

-     *          part of unique index they may not be null.

-     *

-     *    Default: 0

-     *

-     * @return mixed MDB2_OK on success, a MDB2 error on failure

-     */

-    function replace($table, $fields)

-    {

-        $count = count($fields);

-        $query = $values = '';

-        $keys = $colnum = 0;

-        for (reset($fields); $colnum < $count; next($fields), $colnum++) {

-            $name = key($fields);

-            if ($colnum > 0) {

-                $query .= ',';

-                $values.= ',';

-            }

-            $query.= $name;

-            if (isset($fields[$name]['null']) && $fields[$name]['null']) {

-                $value = 'NULL';

-            } else {

-                $type = isset($fields[$name]['type']) ? $fields[$name]['type'] : null;

-                $value = $this->quote($fields[$name]['value'], $type);

-                if (PEAR::isError($value)) {

-                    return $value;

-                }

-            }

-            $values.= $value;

-            if (isset($fields[$name]['key']) && $fields[$name]['key']) {

-                if ($value === 'NULL') {

-                    return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,

-                        'key value '.$name.' may not be NULL', __FUNCTION__);

-                }

-                $keys++;

-            }

-        }

-        if ($keys == 0) {

-            return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,

-                'not specified which fields are keys', __FUNCTION__);

-        }

-

-        $connection = $this->getConnection();

-        if (PEAR::isError($connection)) {

-            return $connection;

-        }

-

-        $query = "REPLACE INTO $table ($query) VALUES ($values)";

-        $result =& $this->_doQuery($query, true, $connection);

-        if (PEAR::isError($result)) {

-            return $result;

-        }

-        return $this->_affectedRows($connection, $result);

-    }

-

-    // }}}

-    // {{{ nextID()

-

-    /**

-     * Returns the next free id of a sequence

-     *

-     * @param string $seq_name name of the sequence

-     * @param boolean $ondemand when true the sequence is

-     *                          automatic created, if it

-     *                          not exists

-     *

-     * @return mixed MDB2 Error Object or id

-     * @access public

-     */

-    function nextID($seq_name, $ondemand = true)

-    {

-        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);

-        $seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);

-        $query = "INSERT INTO $sequence_name ($seqcol_name) VALUES (NULL)";

-        $this->expectError(MDB2_ERROR_NOSUCHTABLE);

-        $result =& $this->_doQuery($query, true);

-        $this->popExpect();

-        if (PEAR::isError($result)) {

-            if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {

-                $this->loadModule('Manager', null, true);

-                $result = $this->manager->createSequence($seq_name);

-                if (PEAR::isError($result)) {

-                    return $this->raiseError($result, null, null,

-                        'on demand sequence '.$seq_name.' could not be created', __FUNCTION__);

-                } else {

-                    return $this->nextID($seq_name, false);

-                }

-            }

-            return $result;

-        }

-        $value = $this->lastInsertID();

-        if (is_numeric($value)) {

-            $query = "DELETE FROM $sequence_name WHERE $seqcol_name < $value";

-            $result =& $this->_doQuery($query, true);

-            if (PEAR::isError($result)) {

-                $this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;

-            }

-        }

-        return $value;

-    }

-

-    // }}}

-    // {{{ lastInsertID()

-

-    /**

-     * Returns the autoincrement ID if supported or $id or fetches the current

-     * ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)

-     *

-     * @param string $table name of the table into which a new row was inserted

-     * @param string $field name of the field into which a new row was inserted

-     * @return mixed MDB2 Error Object or id

-     * @access public

-     */

-    function lastInsertID($table = null, $field = null)

-    {

-        // not using mysql_insert_id() due to http://pear.php.net/bugs/bug.php?id=8051

-        return $this->queryOne('SELECT LAST_INSERT_ID()', 'integer');

-    }

-

-    // }}}

-    // {{{ currID()

-

-    /**

-     * Returns the current id of a sequence

-     *

-     * @param string $seq_name name of the sequence

-     * @return mixed MDB2 Error Object or id

-     * @access public

-     */

-    function currID($seq_name)

-    {

-        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);

-        $seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);

-        $query = "SELECT MAX($seqcol_name) FROM $sequence_name";

-        return $this->queryOne($query, 'integer');

-    }

-}

-

-/**

- * MDB2 MySQL result driver

- *

- * @package MDB2

- * @category Database

- * @author  Lukas Smith <smith@pooteeweet.org>

- */

-class MDB2_Result_mysql extends MDB2_Result_Common

-{

-    // }}}

-    // {{{ fetchRow()

-

-    /**

-     * Fetch a row and insert the data into an existing array.

-     *

-     * @param int       $fetchmode  how the array data should be indexed

-     * @param int    $rownum    number of the row where the data can be found

-     * @return int data array on success, a MDB2 error on failure

-     * @access public

-     */

-    function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)

-    {

-        if (!is_null($rownum)) {

-            $seek = $this->seek($rownum);

-            if (PEAR::isError($seek)) {

-                return $seek;

-            }

-        }

-        if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {

-            $fetchmode = $this->db->fetchmode;

-        }

-        if ($fetchmode & MDB2_FETCHMODE_ASSOC) {

-            $row = @mysql_fetch_assoc($this->result);

-            if (is_array($row)

-                && $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE

-            ) {

-                $row = array_change_key_case($row, $this->db->options['field_case']);

-            }

-        } else {

-           $row = @mysql_fetch_row($this->result);

-        }

-

-        if (!$row) {

-            if ($this->result === false) {

-                $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,

-                    'resultset has already been freed', __FUNCTION__);

-                return $err;

-            }

-            $null = null;

-            return $null;

-        }

-        $mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;

-        $rtrim = false;

-        if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {

-            if (empty($this->types)) {

-                $mode += MDB2_PORTABILITY_RTRIM;

-            } else {

-                $rtrim = true;

-            }

-        }

-        if ($mode) {

-            $this->db->_fixResultArrayValues($row, $mode);

-        }

-        if (!empty($this->types)) {

-            $row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);

-        }

-        if (!empty($this->values)) {

-            $this->_assignBindColumns($row);

-        }

-        if ($fetchmode === MDB2_FETCHMODE_OBJECT) {

-            $object_class = $this->db->options['fetch_class'];

-            if ($object_class == 'stdClass') {

-                $row = (object) $row;

-            } else {

-                $row = &new $object_class($row);

-            }

-        }

-        ++$this->rownum;

-        return $row;

-    }

-

-    // }}}

-    // {{{ _getColumnNames()

-

-    /**

-     * Retrieve the names of columns returned by the DBMS in a query result.

-     *

-     * @return  mixed   Array variable that holds the names of columns as keys

-     *                  or an MDB2 error on failure.

-     *                  Some DBMS may not return any columns when the result set

-     *                  does not contain any rows.

-     * @access private

-     */

-    function _getColumnNames()

-    {

-        $columns = array();

-        $numcols = $this->numCols();

-        if (PEAR::isError($numcols)) {

-            return $numcols;

-        }

-        for ($column = 0; $column < $numcols; $column++) {

-            $column_name = @mysql_field_name($this->result, $column);

-            $columns[$column_name] = $column;

-        }

-        if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {

-            $columns = array_change_key_case($columns, $this->db->options['field_case']);

-        }

-        return $columns;

-    }

-

-    // }}}

-    // {{{ numCols()

-

-    /**

-     * Count the number of columns returned by the DBMS in a query result.

-     *

-     * @return mixed integer value with the number of columns, a MDB2 error

-     *                       on failure

-     * @access public

-     */

-    function numCols()

-    {

-        $cols = @mysql_num_fields($this->result);

-        if (is_null($cols)) {

-            if ($this->result === false) {

-                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,

-                    'resultset has already been freed', __FUNCTION__);

-            } elseif (is_null($this->result)) {

-                return count($this->types);

-            }

-            return $this->db->raiseError(null, null, null,

-                'Could not get column count', __FUNCTION__);

-        }

-        return $cols;

-    }

-

-    // }}}

-    // {{{ free()

-

-    /**

-     * Free the internal resources associated with result.

-     *

-     * @return boolean true on success, false if result is invalid

-     * @access public

-     */

-    function free()

-    {

-        if (is_resource($this->result) && $this->db->connection) {

-            $free = @mysql_free_result($this->result);

-            if ($free === false) {

-                return $this->db->raiseError(null, null, null,

-                    'Could not free result', __FUNCTION__);

-            }

-        }

-        $this->result = false;

-        return MDB2_OK;

-    }

-}

-

-/**

- * MDB2 MySQL buffered result driver

- *

- * @package MDB2

- * @category Database

- * @author  Lukas Smith <smith@pooteeweet.org>

- */

-class MDB2_BufferedResult_mysql extends MDB2_Result_mysql

-{

-    // }}}

-    // {{{ seek()

-

-    /**

-     * Seek to a specific row in a result set

-     *

-     * @param int    $rownum    number of the row where the data can be found

-     * @return mixed MDB2_OK on success, a MDB2 error on failure

-     * @access public

-     */

-    function seek($rownum = 0)

-    {

-        if ($this->rownum != ($rownum - 1) && !@mysql_data_seek($this->result, $rownum)) {

-            if ($this->result === false) {

-                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,

-                    'resultset has already been freed', __FUNCTION__);

-            } elseif (is_null($this->result)) {

-                return MDB2_OK;

-            }

-            return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,

-                'tried to seek to an invalid row number ('.$rownum.')', __FUNCTION__);

-        }

-        $this->rownum = $rownum - 1;

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ valid()

-

-    /**

-     * Check if the end of the result set has been reached

-     *

-     * @return mixed true or false on sucess, a MDB2 error on failure

-     * @access public

-     */

-    function valid()

-    {

-        $numrows = $this->numRows();

-        if (PEAR::isError($numrows)) {

-            return $numrows;

-        }

-        return $this->rownum < ($numrows - 1);

-    }

-

-    // }}}

-    // {{{ numRows()

-

-    /**

-     * Returns the number of rows in a result object

-     *

-     * @return mixed MDB2 Error Object or the number of rows

-     * @access public

-     */

-    function numRows()

-    {

-        $rows = @mysql_num_rows($this->result);

-        if (false === $rows) {

-            if (false === $this->result) {

-                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,

-                    'resultset has already been freed', __FUNCTION__);

-            } elseif (is_null($this->result)) {

-                return 0;

-            }

-            return $this->db->raiseError(null, null, null,

-                'Could not get row count', __FUNCTION__);

-        }

-        return $rows;

-    }

-}

-

-/**

- * MDB2 MySQL statement driver

- *

- * @package MDB2

- * @category Database

- * @author  Lukas Smith <smith@pooteeweet.org>

- */

-class MDB2_Statement_mysql extends MDB2_Statement_Common

-{

-    // {{{ _execute()

-

-    /**

-     * Execute a prepared query statement helper method.

-     *

-     * @param mixed $result_class string which specifies which result class to use

-     * @param mixed $result_wrap_class string which specifies which class to wrap results in

-     * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure

-     * @access private

-     */

-    function &_execute($result_class = true, $result_wrap_class = false)

-    {

-        if (is_null($this->statement)) {

-            $result =& parent::_execute($result_class, $result_wrap_class);

-            return $result;

-        }

-        $this->db->last_query = $this->query;

-        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'pre', 'parameters' => $this->values));

-        if ($this->db->getOption('disable_query')) {

-            $result = $this->is_manip ? 0 : null;

-            return $result;

-        }

-

-        $connection = $this->db->getConnection();

-        if (PEAR::isError($connection)) {

-            return $connection;

-        }

-

-        $query = 'EXECUTE '.$this->statement;

-        if (!empty($this->positions)) {

-            $parameters = array();

-            foreach ($this->positions as $parameter) {

-                if (!array_key_exists($parameter, $this->values)) {

-                    return $this->db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,

-                        'Unable to bind to missing placeholder: '.$parameter, __FUNCTION__);

-                }

-                $value = $this->values[$parameter];

-                $type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;

-                if (is_resource($value) || $type == 'clob' || $type == 'blob' && $this->db->options['lob_allow_url_include']) {

-                    if (!is_resource($value) && preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {

-                        if ($match[1] == 'file://') {

-                            $value = $match[2];

-                        }

-                        $value = @fopen($value, 'r');

-                        $close = true;

-                    }

-                    if (is_resource($value)) {

-                        $data = '';

-                        while (!@feof($value)) {

-                            $data.= @fread($value, $this->db->options['lob_buffer_length']);

-                        }

-                        if ($close) {

-                            @fclose($value);

-                        }

-                        $value = $data;

-                    }

-                }

-                $quoted = $this->db->quote($value, $type);

-                if (PEAR::isError($quoted)) {

-                    return $quoted;

-                }

-                $param_query = 'SET @'.$parameter.' = '.$quoted;

-                $result = $this->db->_doQuery($param_query, true, $connection);

-                if (PEAR::isError($result)) {

-                    return $result;

-                }

-            }

-            $query.= ' USING @'.implode(', @', array_values($this->positions));

-        }

-

-        $result = $this->db->_doQuery($query, $this->is_manip, $connection);

-        if (PEAR::isError($result)) {

-            return $result;

-        }

-

-        if ($this->is_manip) {

-            $affected_rows = $this->db->_affectedRows($connection, $result);

-            return $affected_rows;

-        }

-

-        $result =& $this->db->_wrapResult($result, $this->result_types,

-            $result_class, $result_wrap_class, $this->limit, $this->offset);

-        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));

-        return $result;

-    }

-

-    // }}}

-    // {{{ free()

-

-    /**

-     * Release resources allocated for the specified prepared query.

-     *

-     * @return mixed MDB2_OK on success, a MDB2 error on failure

-     * @access public

-     */

-    function free()

-    {

-        if (is_null($this->positions)) {

-            return $this->db->raiseError(MDB2_ERROR, null, null,

-                'Prepared statement has already been freed', __FUNCTION__);

-        }

-        $result = MDB2_OK;

-

-        if (!is_null($this->statement)) {

-            $connection = $this->db->getConnection();

-            if (PEAR::isError($connection)) {

-                return $connection;

-            }

-            $query = 'DEALLOCATE PREPARE '.$this->statement;

-            $result = $this->db->_doQuery($query, true, $connection);

-        }

-

-        parent::free();

-        return $result;

-    }

-}

+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org>                           |
+// +----------------------------------------------------------------------+
+//
+// $Id: mysql.php,v 1.208 2008/03/13 03:31:55 afz Exp $
+//
+
+/**
+ * MDB2 MySQL driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_mysql extends MDB2_Driver_Common
+{
+    // {{{ properties
+
+    var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => '\\', 'escape_pattern' => '\\');
+
+    var $identifier_quoting = array('start' => '`', 'end' => '`', 'escape' => '`');
+
+    var $sql_comments = array(
+        array('start' => '-- ', 'end' => "\n", 'escape' => false),
+        array('start' => '#', 'end' => "\n", 'escape' => false),
+        array('start' => '/*', 'end' => '*/', 'escape' => false),
+    );
+
+    var $server_capabilities_checked = false;
+
+    var $start_transaction = false;
+
+    var $varchar_max_length = 255;
+
+    // }}}
+    // {{{ constructor
+
+    /**
+     * Constructor
+     */
+    function __construct()
+    {
+        parent::__construct();
+
+        $this->phptype = 'mysql';
+        $this->dbsyntax = 'mysql';
+
+        $this->supported['sequences'] = 'emulated';
+        $this->supported['indexes'] = true;
+        $this->supported['affected_rows'] = true;
+        $this->supported['transactions'] = false;
+        $this->supported['savepoints'] = false;
+        $this->supported['summary_functions'] = true;
+        $this->supported['order_by_text'] = true;
+        $this->supported['current_id'] = 'emulated';
+        $this->supported['limit_queries'] = true;
+        $this->supported['LOBs'] = true;
+        $this->supported['replace'] = true;
+        $this->supported['sub_selects'] = 'emulated';
+        $this->supported['triggers'] = false;
+        $this->supported['auto_increment'] = true;
+        $this->supported['primary_key'] = true;
+        $this->supported['result_introspection'] = true;
+        $this->supported['prepared_statements'] = 'emulated';
+        $this->supported['identifier_quoting'] = true;
+        $this->supported['pattern_escaping'] = true;
+        $this->supported['new_link'] = true;
+
+        $this->options['DBA_username'] = false;
+        $this->options['DBA_password'] = false;
+        $this->options['default_table_type'] = '';
+        $this->options['max_identifiers_length'] = 64;
+
+        $this->_reCheckSupportedOptions();
+    }
+
+    // }}}
+    // {{{ _reCheckSupportedOptions()
+    
+    /**
+     * If the user changes certain options, other capabilities may depend
+     * on the new settings, so we need to check them (again).
+     *
+     * @access private
+     */
+    function _reCheckSupportedOptions()
+    {
+        $this->supported['transactions'] = $this->options['use_transactions'];
+        $this->supported['savepoints']   = $this->options['use_transactions'];
+        if ($this->options['default_table_type']) {
+            switch (strtoupper($this->options['default_table_type'])) {
+            case 'BLACKHOLE':
+            case 'MEMORY':
+            case 'ARCHIVE':
+            case 'CSV':
+            case 'HEAP':
+            case 'ISAM':
+            case 'MERGE':
+            case 'MRG_ISAM':
+            case 'ISAM':
+            case 'MRG_MYISAM':
+            case 'MYISAM':
+                $this->supported['savepoints']   = false;
+                $this->supported['transactions'] = false;
+                $this->warnings[] = $this->options['default_table_type'] .
+                    ' is not a supported default table type';
+                break;
+            }
+        }
+    }
+
+    // }}}
+    // {{{ function setOption($option, $value)
+
+    /**
+     * set the option for the db class
+     *
+     * @param   string  option name
+     * @param   mixed   value for the option
+     *
+     * @return  mixed   MDB2_OK or MDB2 Error Object
+     *
+     * @access  public
+     */
+    function setOption($option, $value)
+    {
+        $res = parent::setOption($option, $value);
+        $this->_reCheckSupportedOptions();
+    }
+
+    // }}}
+    // {{{ errorInfo()
+
+    /**
+     * This method is used to collect information about an error
+     *
+     * @param integer $error
+     * @return array
+     * @access public
+     */
+    function errorInfo($error = null)
+    {
+        if ($this->connection) {
+            $native_code = @mysql_errno($this->connection);
+            $native_msg  = @mysql_error($this->connection);
+        } else {
+            $native_code = @mysql_errno();
+            $native_msg  = @mysql_error();
+        }
+        if (is_null($error)) {
+            static $ecode_map;
+            if (empty($ecode_map)) {
+                $ecode_map = array(
+                    1000 => MDB2_ERROR_INVALID, //hashchk
+                    1001 => MDB2_ERROR_INVALID, //isamchk
+                    1004 => MDB2_ERROR_CANNOT_CREATE,
+                    1005 => MDB2_ERROR_CANNOT_CREATE,
+                    1006 => MDB2_ERROR_CANNOT_CREATE,
+                    1007 => MDB2_ERROR_ALREADY_EXISTS,
+                    1008 => MDB2_ERROR_CANNOT_DROP,
+                    1009 => MDB2_ERROR_CANNOT_DROP,
+                    1010 => MDB2_ERROR_CANNOT_DROP,
+                    1011 => MDB2_ERROR_CANNOT_DELETE,
+                    1022 => MDB2_ERROR_ALREADY_EXISTS,
+                    1029 => MDB2_ERROR_NOT_FOUND,
+                    1032 => MDB2_ERROR_NOT_FOUND,
+                    1044 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1045 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1046 => MDB2_ERROR_NODBSELECTED,
+                    1048 => MDB2_ERROR_CONSTRAINT,
+                    1049 => MDB2_ERROR_NOSUCHDB,
+                    1050 => MDB2_ERROR_ALREADY_EXISTS,
+                    1051 => MDB2_ERROR_NOSUCHTABLE,
+                    1054 => MDB2_ERROR_NOSUCHFIELD,
+                    1060 => MDB2_ERROR_ALREADY_EXISTS,
+                    1061 => MDB2_ERROR_ALREADY_EXISTS,
+                    1062 => MDB2_ERROR_ALREADY_EXISTS,
+                    1064 => MDB2_ERROR_SYNTAX,
+                    1067 => MDB2_ERROR_INVALID,
+                    1072 => MDB2_ERROR_NOT_FOUND,
+                    1086 => MDB2_ERROR_ALREADY_EXISTS,
+                    1091 => MDB2_ERROR_NOT_FOUND,
+                    1100 => MDB2_ERROR_NOT_LOCKED,
+                    1109 => MDB2_ERROR_NOT_FOUND,
+                    1125 => MDB2_ERROR_ALREADY_EXISTS,
+                    1136 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+                    1138 => MDB2_ERROR_INVALID,
+                    1142 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1143 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1146 => MDB2_ERROR_NOSUCHTABLE,
+                    1149 => MDB2_ERROR_SYNTAX,
+                    1169 => MDB2_ERROR_CONSTRAINT,
+                    1176 => MDB2_ERROR_NOT_FOUND,
+                    1177 => MDB2_ERROR_NOSUCHTABLE,
+                    1213 => MDB2_ERROR_DEADLOCK,
+                    1216 => MDB2_ERROR_CONSTRAINT,
+                    1217 => MDB2_ERROR_CONSTRAINT,
+                    1227 => MDB2_ERROR_ACCESS_VIOLATION,
+                    1235 => MDB2_ERROR_CANNOT_CREATE,
+                    1299 => MDB2_ERROR_INVALID_DATE,
+                    1300 => MDB2_ERROR_INVALID,
+                    1304 => MDB2_ERROR_ALREADY_EXISTS,
+                    1305 => MDB2_ERROR_NOT_FOUND,
+                    1306 => MDB2_ERROR_CANNOT_DROP,
+                    1307 => MDB2_ERROR_CANNOT_CREATE,
+                    1334 => MDB2_ERROR_CANNOT_ALTER,
+                    1339 => MDB2_ERROR_NOT_FOUND,
+                    1356 => MDB2_ERROR_INVALID,
+                    1359 => MDB2_ERROR_ALREADY_EXISTS,
+                    1360 => MDB2_ERROR_NOT_FOUND,
+                    1363 => MDB2_ERROR_NOT_FOUND,
+                    1365 => MDB2_ERROR_DIVZERO,
+                    1451 => MDB2_ERROR_CONSTRAINT,
+                    1452 => MDB2_ERROR_CONSTRAINT,
+                    1542 => MDB2_ERROR_CANNOT_DROP,
+                    1546 => MDB2_ERROR_CONSTRAINT,
+                    1582 => MDB2_ERROR_CONSTRAINT,
+                    2003 => MDB2_ERROR_CONNECT_FAILED,
+                    2019 => MDB2_ERROR_INVALID,
+                );
+            }
+            if ($this->options['portability'] & MDB2_PORTABILITY_ERRORS) {
+                $ecode_map[1022] = MDB2_ERROR_CONSTRAINT;
+                $ecode_map[1048] = MDB2_ERROR_CONSTRAINT_NOT_NULL;
+                $ecode_map[1062] = MDB2_ERROR_CONSTRAINT;
+            } else {
+                // Doing this in case mode changes during runtime.
+                $ecode_map[1022] = MDB2_ERROR_ALREADY_EXISTS;
+                $ecode_map[1048] = MDB2_ERROR_CONSTRAINT;
+                $ecode_map[1062] = MDB2_ERROR_ALREADY_EXISTS;
+            }
+            if (isset($ecode_map[$native_code])) {
+                $error = $ecode_map[$native_code];
+            }
+        }
+        return array($error, $native_code, $native_msg);
+    }
+
+    // }}}
+    // {{{ escape()
+
+    /**
+     * Quotes a string so it can be safely used in a query. It will quote
+     * the text so it can safely be used within a query.
+     *
+     * @param   string  the input string to quote
+     * @param   bool    escape wildcards
+     *
+     * @return  string  quoted string
+     *
+     * @access  public
+     */
+    function escape($text, $escape_wildcards = false)
+    {
+        if ($escape_wildcards) {
+            $text = $this->escapePattern($text);
+        }
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        $text = @mysql_real_escape_string($text, $connection);
+        return $text;
+    }
+
+    // }}}
+    // {{{ beginTransaction()
+
+    /**
+     * Start a transaction or set a savepoint.
+     *
+     * @param   string  name of a savepoint to set
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function beginTransaction($savepoint = null)
+    {
+        $this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        $this->_getServerCapabilities();
+        if (!is_null($savepoint)) {
+            if (!$this->supports('savepoints')) {
+                return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'savepoints are not supported', __FUNCTION__);
+            }
+            if (!$this->in_transaction) {
+                return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                    'savepoint cannot be released when changes are auto committed', __FUNCTION__);
+            }
+            $query = 'SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        } elseif ($this->in_transaction) {
+            return MDB2_OK;  //nothing to do
+        }
+        if (!$this->destructor_registered && $this->opened_persistent) {
+            $this->destructor_registered = true;
+            register_shutdown_function('MDB2_closeOpenTransactions');
+        }
+        $query = $this->start_transaction ? 'START TRANSACTION' : 'SET AUTOCOMMIT = 1';
+        $result =& $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = true;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ commit()
+
+    /**
+     * Commit the database changes done during a transaction that is in
+     * progress or release a savepoint. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after committing the pending changes.
+     *
+     * @param   string  name of a savepoint to release
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function commit($savepoint = null)
+    {
+        $this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (!is_null($savepoint)) {
+            if (!$this->supports('savepoints')) {
+                return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'savepoints are not supported', __FUNCTION__);
+            }
+            $server_info = $this->getServerVersion();
+            if (version_compare($server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'], '5.0.3', '<')) {
+                return MDB2_OK;
+            }
+            $query = 'RELEASE SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        }
+
+        if (!$this->supports('transactions')) {
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'transactions are not supported', __FUNCTION__);
+        }
+
+        $result =& $this->_doQuery('COMMIT', true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if (!$this->start_transaction) {
+            $query = 'SET AUTOCOMMIT = 0';
+            $result =& $this->_doQuery($query, true);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ rollback()
+
+    /**
+     * Cancel any database changes done during a transaction or since a specific
+     * savepoint that is in progress. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after canceling the pending changes.
+     *
+     * @param   string  name of a savepoint to rollback to
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function rollback($savepoint = null)
+    {
+        $this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'rollback cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (!is_null($savepoint)) {
+            if (!$this->supports('savepoints')) {
+                return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                    'savepoints are not supported', __FUNCTION__);
+            }
+            $query = 'ROLLBACK TO SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        }
+
+        $query = 'ROLLBACK';
+        $result =& $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        if (!$this->start_transaction) {
+            $query = 'SET AUTOCOMMIT = 0';
+            $result =& $this->_doQuery($query, true);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ function setTransactionIsolation()
+
+    /**
+     * Set the transacton isolation level.
+     *
+     * @param   string  standard isolation level
+     *                  READ UNCOMMITTED (allows dirty reads)
+     *                  READ COMMITTED (prevents dirty reads)
+     *                  REPEATABLE READ (prevents nonrepeatable reads)
+     *                  SERIALIZABLE (prevents phantom reads)
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     * @since   2.1.1
+     */
+    function setTransactionIsolation($isolation)
+    {
+        $this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
+        if (!$this->supports('transactions')) {
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'transactions are not supported', __FUNCTION__);
+        }
+        switch ($isolation) {
+        case 'READ UNCOMMITTED':
+        case 'READ COMMITTED':
+        case 'REPEATABLE READ':
+        case 'SERIALIZABLE':
+            break;
+        default:
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'isolation level is not supported: '.$isolation, __FUNCTION__);
+        }
+
+        $query = "SET SESSION TRANSACTION ISOLATION LEVEL $isolation";
+        return $this->_doQuery($query, true);
+    }
+
+    // }}}
+    // {{{ _doConnect()
+
+    /**
+     * do the grunt work of the connect
+     *
+     * @return connection on success or MDB2 Error Object on failure
+     * @access protected
+     */
+    function _doConnect($username, $password, $persistent = false)
+    {
+        if (!PEAR::loadExtension($this->phptype)) {
+            return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
+        }
+
+        $params = array();
+        if ($this->dsn['protocol'] && $this->dsn['protocol'] == 'unix') {
+            $params[0] = ':' . $this->dsn['socket'];
+        } else {
+            $params[0] = $this->dsn['hostspec'] ? $this->dsn['hostspec']
+                         : 'localhost';
+            if ($this->dsn['port']) {
+                $params[0].= ':' . $this->dsn['port'];
+            }
+        }
+        $params[] = $username ? $username : null;
+        $params[] = $password ? $password : null;
+        if (!$persistent) {
+            if (isset($this->dsn['new_link'])
+                && ($this->dsn['new_link'] == 'true' || $this->dsn['new_link'] === true)
+            ) {
+                $params[] = true;
+            } else {
+                $params[] = false;
+            }
+        }
+        if (version_compare(phpversion(), '4.3.0', '>=')) {
+            $params[] = isset($this->dsn['client_flags'])
+                ? $this->dsn['client_flags'] : null;
+        }
+        $connect_function = $persistent ? 'mysql_pconnect' : 'mysql_connect';
+
+        $connection = @call_user_func_array($connect_function, $params);
+        if (!$connection) {
+            if (($err = @mysql_error()) != '') {
+                return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+                    $err, __FUNCTION__);
+            } else {
+                return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+                    'unable to establish a connection', __FUNCTION__);
+            }
+        }
+
+        if (!empty($this->dsn['charset'])) {
+            $result = $this->setCharset($this->dsn['charset'], $connection);
+            if (PEAR::isError($result)) {
+                $this->disconnect(false);
+                return $result;
+            }
+        }
+
+        return $connection;
+    }
+
+    // }}}
+    // {{{ connect()
+
+    /**
+     * Connect to the database
+     *
+     * @return MDB2_OK on success, MDB2 Error Object on failure
+     * @access public
+     */
+    function connect()
+    {
+        if (is_resource($this->connection)) {
+            //if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
+            if (MDB2::areEquals($this->connected_dsn, $this->dsn)
+                && $this->opened_persistent == $this->options['persistent']
+            ) {
+                return MDB2_OK;
+            }
+            $this->disconnect(false);
+        }
+
+        $connection = $this->_doConnect(
+            $this->dsn['username'],
+            $this->dsn['password'],
+            $this->options['persistent']
+        );
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $this->connection = $connection;
+        $this->connected_dsn = $this->dsn;
+        $this->connected_database_name = '';
+        $this->opened_persistent = $this->options['persistent'];
+        $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
+
+        if ($this->database_name) {
+            if ($this->database_name != $this->connected_database_name) {
+                if (!@mysql_select_db($this->database_name, $connection)) {
+                    $err = $this->raiseError(null, null, null,
+                        'Could not select the database: '.$this->database_name, __FUNCTION__);
+                    return $err;
+                }
+                $this->connected_database_name = $this->database_name;
+            }
+        }
+
+        $this->_getServerCapabilities();
+
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ setCharset()
+
+    /**
+     * Set the charset on the current connection
+     *
+     * @param string    charset (or array(charset, collation))
+     * @param resource  connection handle
+     *
+     * @return true on success, MDB2 Error Object on failure
+     */
+    function setCharset($charset, $connection = null)
+    {
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        $collation = null;
+        if (is_array($charset) && 2 == count($charset)) {
+            $collation = array_pop($charset);
+            $charset   = array_pop($charset);
+        }
+        $query = "SET NAMES '".mysql_real_escape_string($charset, $connection)."'";
+        if (!is_null($collation)) {
+            $query .= " COLLATE '".mysqli_real_escape_string($connection, $collation)."'";
+        }
+        return $this->_doQuery($query, true, $connection);
+    }
+
+    // }}}
+    // {{{ databaseExists()
+
+    /**
+     * check if given database name is exists?
+     *
+     * @param string $name    name of the database that should be checked
+     *
+     * @return mixed true/false on success, a MDB2 error on failure
+     * @access public
+     */
+    function databaseExists($name)
+    {
+        $connection = $this->_doConnect($this->dsn['username'],
+                                        $this->dsn['password'],
+                                        $this->options['persistent']);
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $result = @mysql_select_db($name, $connection);
+        @mysql_close($connection);
+
+        return $result;
+    }
+
+    // }}}
+    // {{{ disconnect()
+
+    /**
+     * Log out and disconnect from the database.
+     *
+     * @param  boolean $force if the disconnect should be forced even if the
+     *                        connection is opened persistently
+     * @return mixed true on success, false if not connected and error
+     *                object on error
+     * @access public
+     */
+    function disconnect($force = true)
+    {
+        if (is_resource($this->connection)) {
+            if ($this->in_transaction) {
+                $dsn = $this->dsn;
+                $database_name = $this->database_name;
+                $persistent = $this->options['persistent'];
+                $this->dsn = $this->connected_dsn;
+                $this->database_name = $this->connected_database_name;
+                $this->options['persistent'] = $this->opened_persistent;
+                $this->rollback();
+                $this->dsn = $dsn;
+                $this->database_name = $database_name;
+                $this->options['persistent'] = $persistent;
+            }
+
+            if (!$this->opened_persistent || $force) {
+                @mysql_close($this->connection);
+            }
+        }
+        return parent::disconnect($force);
+    }
+
+    // }}}
+    // {{{ standaloneQuery()
+
+   /**
+     * execute a query as DBA
+     *
+     * @param string $query the SQL query
+     * @param mixed   $types  array that contains the types of the columns in
+     *                        the result set
+     * @param boolean $is_manip  if the query is a manipulation query
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function &standaloneQuery($query, $types = null, $is_manip = false)
+    {
+        $user = $this->options['DBA_username']? $this->options['DBA_username'] : $this->dsn['username'];
+        $pass = $this->options['DBA_password']? $this->options['DBA_password'] : $this->dsn['password'];
+        $connection = $this->_doConnect($user, $pass, $this->options['persistent']);
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $offset = $this->offset;
+        $limit = $this->limit;
+        $this->offset = $this->limit = 0;
+        $query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
+        
+        $result =& $this->_doQuery($query, $is_manip, $connection, $this->database_name);
+        if (!PEAR::isError($result)) {
+            $result = $this->_affectedRows($connection, $result);
+        }
+
+        @mysql_close($connection);
+        return $result;
+    }
+
+    // }}}
+    // {{{ _doQuery()
+
+    /**
+     * Execute a query
+     * @param string $query  query
+     * @param boolean $is_manip  if the query is a manipulation query
+     * @param resource $connection
+     * @param string $database_name
+     * @return result or error object
+     * @access protected
+     */
+    function &_doQuery($query, $is_manip = false, $connection = null, $database_name = null)
+    {
+        $this->last_query = $query;
+        $result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
+        if ($result) {
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            $query = $result;
+        }
+        if ($this->options['disable_query']) {
+            $result = $is_manip ? 0 : null;
+            return $result;
+        }
+
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        if (is_null($database_name)) {
+            $database_name = $this->database_name;
+        }
+
+        if ($database_name) {
+            if ($database_name != $this->connected_database_name) {
+                if (!@mysql_select_db($database_name, $connection)) {
+                    $err = $this->raiseError(null, null, null,
+                        'Could not select the database: '.$database_name, __FUNCTION__);
+                    return $err;
+                }
+                $this->connected_database_name = $database_name;
+            }
+        }
+
+        $function = $this->options['result_buffering']
+            ? 'mysql_query' : 'mysql_unbuffered_query';
+        $result = @$function($query, $connection);
+        if (!$result) {
+            $err =& $this->raiseError(null, null, null,
+                'Could not execute statement', __FUNCTION__);
+            return $err;
+        }
+
+        $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
+        return $result;
+    }
+
+    // }}}
+    // {{{ _affectedRows()
+
+    /**
+     * Returns the number of rows affected
+     *
+     * @param resource $result
+     * @param resource $connection
+     * @return mixed MDB2 Error Object or the number of rows affected
+     * @access private
+     */
+    function _affectedRows($connection, $result = null)
+    {
+        if (is_null($connection)) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        return @mysql_affected_rows($connection);
+    }
+
+    // }}}
+    // {{{ _modifyQuery()
+
+    /**
+     * Changes a query string for various DBMS specific reasons
+     *
+     * @param string $query  query to modify
+     * @param boolean $is_manip  if it is a DML query
+     * @param integer $limit  limit the number of rows
+     * @param integer $offset  start reading from given offset
+     * @return string modified query
+     * @access protected
+     */
+    function _modifyQuery($query, $is_manip, $limit, $offset)
+    {
+        if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) {
+            // "DELETE FROM table" gives 0 affected rows in MySQL.
+            // This little hack lets you know how many rows were deleted.
+            if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
+                $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
+                                      'DELETE FROM \1 WHERE 1=1', $query);
+            }
+        }
+        if ($limit > 0
+            && !preg_match('/LIMIT\s*\d(?:\s*(?:,|OFFSET)\s*\d+)?(?:[^\)]*)?$/i', $query)
+        ) {
+            $query = rtrim($query);
+            if (substr($query, -1) == ';') {
+                $query = substr($query, 0, -1);
+            }
+
+            // LIMIT doesn't always come last in the query
+            // @see http://dev.mysql.com/doc/refman/5.0/en/select.html
+            $after = '';
+            if (preg_match('/(\s+INTO\s+(?:OUT|DUMP)FILE\s.*)$/ims', $query, $matches)) {
+                $after = $matches[0];
+                $query = preg_replace('/(\s+INTO\s+(?:OUT|DUMP)FILE\s.*)$/ims', '', $query);
+            } elseif (preg_match('/(\s+FOR\s+UPDATE\s*)$/i', $query, $matches)) {
+               $after = $matches[0];
+               $query = preg_replace('/(\s+FOR\s+UPDATE\s*)$/im', '', $query);
+            } elseif (preg_match('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', $query, $matches)) {
+               $after = $matches[0];
+               $query = preg_replace('/(\s+LOCK\s+IN\s+SHARE\s+MODE\s*)$/im', '', $query);
+            }
+
+            if ($is_manip) {
+                return $query . " LIMIT $limit" . $after;
+            } else {
+                return $query . " LIMIT $offset, $limit" . $after;
+            }
+        }
+        return $query;
+    }
+
+    // }}}
+    // {{{ getServerVersion()
+
+    /**
+     * return version information about the server
+     *
+     * @param bool   $native  determines if the raw version string should be returned
+     * @return mixed array/string with version information or MDB2 error object
+     * @access public
+     */
+    function getServerVersion($native = false)
+    {
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        if ($this->connected_server_info) {
+            $server_info = $this->connected_server_info;
+        } else {
+            $server_info = @mysql_get_server_info($connection);
+        }
+        if (!$server_info) {
+            return $this->raiseError(null, null, null,
+                'Could not get server information', __FUNCTION__);
+        }
+        // cache server_info
+        $this->connected_server_info = $server_info;
+        if (!$native) {
+            $tmp = explode('.', $server_info, 3);
+            if (isset($tmp[2]) && strpos($tmp[2], '-')) {
+                $tmp2 = explode('-', @$tmp[2], 2);
+            } else {
+                $tmp2[0] = isset($tmp[2]) ? $tmp[2] : null;
+                $tmp2[1] = null;
+            }
+            $server_info = array(
+                'major' => isset($tmp[0]) ? $tmp[0] : null,
+                'minor' => isset($tmp[1]) ? $tmp[1] : null,
+                'patch' => $tmp2[0],
+                'extra' => $tmp2[1],
+                'native' => $server_info,
+            );
+        }
+        return $server_info;
+    }
+
+    // }}}
+    // {{{ _getServerCapabilities()
+
+    /**
+     * Fetch some information about the server capabilities
+     * (transactions, subselects, prepared statements, etc).
+     *
+     * @access private
+     */
+    function _getServerCapabilities()
+    {
+        if (!$this->server_capabilities_checked) {
+            $this->server_capabilities_checked = true;
+
+            //set defaults
+            $this->supported['sub_selects'] = 'emulated';
+            $this->supported['prepared_statements'] = 'emulated';
+            $this->supported['triggers'] = false;
+            $this->start_transaction = false;
+            $this->varchar_max_length = 255;
+            
+            $server_info = $this->getServerVersion();
+            if (is_array($server_info)) {
+                $server_version = $server_info['major'].'.'.$server_info['minor'].'.'.$server_info['patch'];
+
+                if (!version_compare($server_version, '4.1.0', '<')) {
+                    $this->supported['sub_selects'] = true;
+                    $this->supported['prepared_statements'] = true;
+                }
+
+                // SAVEPOINTs were introduced in MySQL 4.0.14 and 4.1.1 (InnoDB)
+                if (version_compare($server_version, '4.1.0', '>=')) {
+                    if (version_compare($server_version, '4.1.1', '<')) {
+                        $this->supported['savepoints'] = false;
+                    }
+                } elseif (version_compare($server_version, '4.0.14', '<')) {
+                    $this->supported['savepoints'] = false;
+                }
+
+                if (!version_compare($server_version, '4.0.11', '<')) {
+                    $this->start_transaction = true;
+                }
+
+                if (!version_compare($server_version, '5.0.3', '<')) {
+                    $this->varchar_max_length = 65532;
+                }
+
+                if (!version_compare($server_version, '5.0.2', '<')) {
+                    $this->supported['triggers'] = true;
+                }
+            }
+        }
+    }
+
+    // }}}
+    // {{{ function _skipUserDefinedVariable($query, $position)
+
+    /**
+     * Utility method, used by prepare() to avoid misinterpreting MySQL user 
+     * defined variables (SELECT @x:=5) for placeholders.
+     * Check if the placeholder is a false positive, i.e. if it is an user defined
+     * variable instead. If so, skip it and advance the position, otherwise
+     * return the current position, which is valid
+     *
+     * @param string $query
+     * @param integer $position current string cursor position
+     * @return integer $new_position
+     * @access protected
+     */
+    function _skipUserDefinedVariable($query, $position)
+    {
+        $found = strpos(strrev(substr($query, 0, $position)), '@');
+        if ($found === false) {
+            return $position;
+        }
+        $pos = strlen($query) - strlen(substr($query, $position)) - $found - 1;
+        $substring = substr($query, $pos, $position - $pos + 2);
+        if (preg_match('/^@\w+\s*:=$/', $substring)) {
+            return $position + 1; //found an user defined variable: skip it
+        }
+        return $position;
+    }
+
+    // }}}
+    // {{{ prepare()
+
+    /**
+     * Prepares a query for multiple execution with execute().
+     * With some database backends, this is emulated.
+     * prepare() requires a generic query as string like
+     * 'INSERT INTO numbers VALUES(?,?)' or
+     * 'INSERT INTO numbers VALUES(:foo,:bar)'.
+     * The ? and :name and are placeholders which can be set using
+     * bindParam() and the query can be sent off using the execute() method.
+     * The allowed format for :name can be set with the 'bindname_format' option.
+     *
+     * @param string $query the query to prepare
+     * @param mixed   $types  array that contains the types of the placeholders
+     * @param mixed   $result_types  array that contains the types of the columns in
+     *                        the result set or MDB2_PREPARE_RESULT, if set to
+     *                        MDB2_PREPARE_MANIP the query is handled as a manipulation query
+     * @param mixed   $lobs   key (field) value (parameter) pair for all lob placeholders
+     * @return mixed resource handle for the prepared query on success, a MDB2
+     *        error on failure
+     * @access public
+     * @see bindParam, execute
+     */
+    function &prepare($query, $types = null, $result_types = null, $lobs = array())
+    {
+        if ($this->options['emulate_prepared']
+            || $this->supported['prepared_statements'] !== true
+        ) {
+            $obj =& parent::prepare($query, $types, $result_types, $lobs);
+            return $obj;
+        }
+        $is_manip = ($result_types === MDB2_PREPARE_MANIP);
+        $offset = $this->offset;
+        $limit = $this->limit;
+        $this->offset = $this->limit = 0;
+        $query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
+        $result = $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'pre'));
+        if ($result) {
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            $query = $result;
+        }
+        $placeholder_type_guess = $placeholder_type = null;
+        $question = '?';
+        $colon = ':';
+        $positions = array();
+        $position = 0;
+        while ($position < strlen($query)) {
+            $q_position = strpos($query, $question, $position);
+            $c_position = strpos($query, $colon, $position);
+            if ($q_position && $c_position) {
+                $p_position = min($q_position, $c_position);
+            } elseif ($q_position) {
+                $p_position = $q_position;
+            } elseif ($c_position) {
+                $p_position = $c_position;
+            } else {
+                break;
+            }
+            if (is_null($placeholder_type)) {
+                $placeholder_type_guess = $query[$p_position];
+            }
+            
+            $new_pos = $this->_skipDelimitedStrings($query, $position, $p_position);
+            if (PEAR::isError($new_pos)) {
+                return $new_pos;
+            }
+            if ($new_pos != $position) {
+                $position = $new_pos;
+                continue; //evaluate again starting from the new position
+            }
+            
+            //make sure this is not part of an user defined variable
+            $new_pos = $this->_skipUserDefinedVariable($query, $position);
+            if ($new_pos != $position) {
+                $position = $new_pos;
+                continue; //evaluate again starting from the new position
+            }
+
+            if ($query[$position] == $placeholder_type_guess) {
+                if (is_null($placeholder_type)) {
+                    $placeholder_type = $query[$p_position];
+                    $question = $colon = $placeholder_type;
+                }
+                if ($placeholder_type == ':') {
+                    $regexp = '/^.{'.($position+1).'}('.$this->options['bindname_format'].').*$/s';
+                    $parameter = preg_replace($regexp, '\\1', $query);
+                    if ($parameter === '') {
+                        $err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+                            'named parameter name must match "bindname_format" option', __FUNCTION__);
+                        return $err;
+                    }
+                    $positions[$p_position] = $parameter;
+                    $query = substr_replace($query, '?', $position, strlen($parameter)+1);
+                } else {
+                    $positions[$p_position] = count($positions);
+                }
+                $position = $p_position + 1;
+            } else {
+                $position = $p_position;
+            }
+        }
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        static $prep_statement_counter = 1;
+        $statement_name = sprintf($this->options['statement_format'], $this->phptype, $prep_statement_counter++ . sha1(microtime() + mt_rand()));
+        $statement_name = substr(strtolower($statement_name), 0, $this->options['max_identifiers_length']);
+        $query = "PREPARE $statement_name FROM ".$this->quote($query, 'text');
+        $statement =& $this->_doQuery($query, true, $connection);
+        if (PEAR::isError($statement)) {
+            return $statement;
+        }
+
+        $class_name = 'MDB2_Statement_'.$this->phptype;
+        $obj = new $class_name($this, $statement_name, $positions, $query, $types, $result_types, $is_manip, $limit, $offset);
+        $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'post', 'result' => $obj));
+        return $obj;
+    }
+
+    // }}}
+    // {{{ replace()
+
+    /**
+     * Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
+     * query, except that if there is already a row in the table with the same
+     * key field values, the REPLACE query just updates its values instead of
+     * inserting a new row.
+     *
+     * The REPLACE type of query does not make part of the SQL standards. Since
+     * practically only MySQL implements it natively, this type of query is
+     * emulated through this method for other DBMS using standard types of
+     * queries inside a transaction to assure the atomicity of the operation.
+     *
+     * @access public
+     *
+     * @param string $table name of the table on which the REPLACE query will
+     *  be executed.
+     * @param array $fields associative array that describes the fields and the
+     *  values that will be inserted or updated in the specified table. The
+     *  indexes of the array are the names of all the fields of the table. The
+     *  values of the array are also associative arrays that describe the
+     *  values and other properties of the table fields.
+     *
+     *  Here follows a list of field properties that need to be specified:
+     *
+     *    value:
+     *          Value to be assigned to the specified field. This value may be
+     *          of specified in database independent type format as this
+     *          function can perform the necessary datatype conversions.
+     *
+     *    Default:
+     *          this property is required unless the Null property
+     *          is set to 1.
+     *
+     *    type
+     *          Name of the type of the field. Currently, all types Metabase
+     *          are supported except for clob and blob.
+     *
+     *    Default: no type conversion
+     *
+     *    null
+     *          Boolean property that indicates that the value for this field
+     *          should be set to null.
+     *
+     *          The default value for fields missing in INSERT queries may be
+     *          specified the definition of a table. Often, the default value
+     *          is already null, but since the REPLACE may be emulated using
+     *          an UPDATE query, make sure that all fields of the table are
+     *          listed in this function argument array.
+     *
+     *    Default: 0
+     *
+     *    key
+     *          Boolean property that indicates that this field should be
+     *          handled as a primary key or at least as part of the compound
+     *          unique index of the table that will determine the row that will
+     *          updated if it exists or inserted a new row otherwise.
+     *
+     *          This function will fail if no key field is specified or if the
+     *          value of a key field is set to null because fields that are
+     *          part of unique index they may not be null.
+     *
+     *    Default: 0
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     */
+    function replace($table, $fields)
+    {
+        $count = count($fields);
+        $query = $values = '';
+        $keys = $colnum = 0;
+        for (reset($fields); $colnum < $count; next($fields), $colnum++) {
+            $name = key($fields);
+            if ($colnum > 0) {
+                $query .= ',';
+                $values.= ',';
+            }
+            $query.= $this->quoteIdentifier($name, true);
+            if (isset($fields[$name]['null']) && $fields[$name]['null']) {
+                $value = 'NULL';
+            } else {
+                $type = isset($fields[$name]['type']) ? $fields[$name]['type'] : null;
+                $value = $this->quote($fields[$name]['value'], $type);
+                if (PEAR::isError($value)) {
+                    return $value;
+                }
+            }
+            $values.= $value;
+            if (isset($fields[$name]['key']) && $fields[$name]['key']) {
+                if ($value === 'NULL') {
+                    return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+                        'key value '.$name.' may not be NULL', __FUNCTION__);
+                }
+                $keys++;
+            }
+        }
+        if ($keys == 0) {
+            return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+                'not specified which fields are keys', __FUNCTION__);
+        }
+
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $table = $this->quoteIdentifier($table, true);
+        $query = "REPLACE INTO $table ($query) VALUES ($values)";
+        $result =& $this->_doQuery($query, true, $connection);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        return $this->_affectedRows($connection, $result);
+    }
+
+    // }}}
+    // {{{ nextID()
+
+    /**
+     * Returns the next free id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @param boolean $ondemand when true the sequence is
+     *                          automatic created, if it
+     *                          not exists
+     *
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function nextID($seq_name, $ondemand = true)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        $seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
+        $query = "INSERT INTO $sequence_name ($seqcol_name) VALUES (NULL)";
+        $this->pushErrorHandling(PEAR_ERROR_RETURN);
+        $this->expectError(MDB2_ERROR_NOSUCHTABLE);
+        $result =& $this->_doQuery($query, true);
+        $this->popExpect();
+        $this->popErrorHandling();
+        if (PEAR::isError($result)) {
+            if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
+                $this->loadModule('Manager', null, true);
+                $result = $this->manager->createSequence($seq_name);
+                if (PEAR::isError($result)) {
+                    return $this->raiseError($result, null, null,
+                        'on demand sequence '.$seq_name.' could not be created', __FUNCTION__);
+                } else {
+                    return $this->nextID($seq_name, false);
+                }
+            }
+            return $result;
+        }
+        $value = $this->lastInsertID();
+        if (is_numeric($value)) {
+            $query = "DELETE FROM $sequence_name WHERE $seqcol_name < $value";
+            $result =& $this->_doQuery($query, true);
+            if (PEAR::isError($result)) {
+                $this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
+            }
+        }
+        return $value;
+    }
+
+    // }}}
+    // {{{ lastInsertID()
+
+    /**
+     * Returns the autoincrement ID if supported or $id or fetches the current
+     * ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
+     *
+     * @param string $table name of the table into which a new row was inserted
+     * @param string $field name of the field into which a new row was inserted
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function lastInsertID($table = null, $field = null)
+    {
+        // not using mysql_insert_id() due to http://pear.php.net/bugs/bug.php?id=8051
+        return $this->queryOne('SELECT LAST_INSERT_ID()', 'integer');
+    }
+
+    // }}}
+    // {{{ currID()
+
+    /**
+     * Returns the current id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function currID($seq_name)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        $seqcol_name = $this->quoteIdentifier($this->options['seqcol_name'], true);
+        $query = "SELECT MAX($seqcol_name) FROM $sequence_name";
+        return $this->queryOne($query, 'integer');
+    }
+}
+
+/**
+ * MDB2 MySQL result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Result_mysql extends MDB2_Result_Common
+{
+    // }}}
+    // {{{ fetchRow()
+
+    /**
+     * Fetch a row and insert the data into an existing array.
+     *
+     * @param int       $fetchmode  how the array data should be indexed
+     * @param int    $rownum    number of the row where the data can be found
+     * @return int data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
+    {
+        if (!is_null($rownum)) {
+            $seek = $this->seek($rownum);
+            if (PEAR::isError($seek)) {
+                return $seek;
+            }
+        }
+        if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
+            $fetchmode = $this->db->fetchmode;
+        }
+        if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
+            $row = @mysql_fetch_assoc($this->result);
+            if (is_array($row)
+                && $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
+            ) {
+                $row = array_change_key_case($row, $this->db->options['field_case']);
+            }
+        } else {
+           $row = @mysql_fetch_row($this->result);
+        }
+
+        if (!$row) {
+            if ($this->result === false) {
+                $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+                return $err;
+            }
+            $null = null;
+            return $null;
+        }
+        $mode = $this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL;
+        $rtrim = false;
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM) {
+            if (empty($this->types)) {
+                $mode += MDB2_PORTABILITY_RTRIM;
+            } else {
+                $rtrim = true;
+            }
+        }
+        if ($mode) {
+            $this->db->_fixResultArrayValues($row, $mode);
+        }
+        if (!empty($this->types)) {
+            $row = $this->db->datatype->convertResultRow($this->types, $row, $rtrim);
+        }
+        if (!empty($this->values)) {
+            $this->_assignBindColumns($row);
+        }
+        if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
+            $object_class = $this->db->options['fetch_class'];
+            if ($object_class == 'stdClass') {
+                $row = (object) $row;
+            } else {
+                $row = &new $object_class($row);
+            }
+        }
+        ++$this->rownum;
+        return $row;
+    }
+
+    // }}}
+    // {{{ _getColumnNames()
+
+    /**
+     * Retrieve the names of columns returned by the DBMS in a query result.
+     *
+     * @return  mixed   Array variable that holds the names of columns as keys
+     *                  or an MDB2 error on failure.
+     *                  Some DBMS may not return any columns when the result set
+     *                  does not contain any rows.
+     * @access private
+     */
+    function _getColumnNames()
+    {
+        $columns = array();
+        $numcols = $this->numCols();
+        if (PEAR::isError($numcols)) {
+            return $numcols;
+        }
+        for ($column = 0; $column < $numcols; $column++) {
+            $column_name = @mysql_field_name($this->result, $column);
+            $columns[$column_name] = $column;
+        }
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $columns = array_change_key_case($columns, $this->db->options['field_case']);
+        }
+        return $columns;
+    }
+
+    // }}}
+    // {{{ numCols()
+
+    /**
+     * Count the number of columns returned by the DBMS in a query result.
+     *
+     * @return mixed integer value with the number of columns, a MDB2 error
+     *                       on failure
+     * @access public
+     */
+    function numCols()
+    {
+        $cols = @mysql_num_fields($this->result);
+        if (is_null($cols)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return count($this->types);
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get column count', __FUNCTION__);
+        }
+        return $cols;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Free the internal resources associated with result.
+     *
+     * @return boolean true on success, false if result is invalid
+     * @access public
+     */
+    function free()
+    {
+        if (is_resource($this->result) && $this->db->connection) {
+            $free = @mysql_free_result($this->result);
+            if ($free === false) {
+                return $this->db->raiseError(null, null, null,
+                    'Could not free result', __FUNCTION__);
+            }
+        }
+        $this->result = false;
+        return MDB2_OK;
+    }
+}
+
+/**
+ * MDB2 MySQL buffered result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_BufferedResult_mysql extends MDB2_Result_mysql
+{
+    // }}}
+    // {{{ seek()
+
+    /**
+     * Seek to a specific row in a result set
+     *
+     * @param int    $rownum    number of the row where the data can be found
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function seek($rownum = 0)
+    {
+        if ($this->rownum != ($rownum - 1) && !@mysql_data_seek($this->result, $rownum)) {
+            if ($this->result === false) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return MDB2_OK;
+            }
+            return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
+                'tried to seek to an invalid row number ('.$rownum.')', __FUNCTION__);
+        }
+        $this->rownum = $rownum - 1;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ valid()
+
+    /**
+     * Check if the end of the result set has been reached
+     *
+     * @return mixed true or false on sucess, a MDB2 error on failure
+     * @access public
+     */
+    function valid()
+    {
+        $numrows = $this->numRows();
+        if (PEAR::isError($numrows)) {
+            return $numrows;
+        }
+        return $this->rownum < ($numrows - 1);
+    }
+
+    // }}}
+    // {{{ numRows()
+
+    /**
+     * Returns the number of rows in a result object
+     *
+     * @return mixed MDB2 Error Object or the number of rows
+     * @access public
+     */
+    function numRows()
+    {
+        $rows = @mysql_num_rows($this->result);
+        if (false === $rows) {
+            if (false === $this->result) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            } elseif (is_null($this->result)) {
+                return 0;
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get row count', __FUNCTION__);
+        }
+        return $rows;
+    }
+}
+
+/**
+ * MDB2 MySQL statement driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Statement_mysql extends MDB2_Statement_Common
+{
+    // {{{ _execute()
+
+    /**
+     * Execute a prepared query statement helper method.
+     *
+     * @param mixed $result_class string which specifies which result class to use
+     * @param mixed $result_wrap_class string which specifies which class to wrap results in
+     * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+     * @access private
+     */
+    function &_execute($result_class = true, $result_wrap_class = false)
+    {
+        if (is_null($this->statement)) {
+            $result =& parent::_execute($result_class, $result_wrap_class);
+            return $result;
+        }
+        $this->db->last_query = $this->query;
+        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'pre', 'parameters' => $this->values));
+        if ($this->db->getOption('disable_query')) {
+            $result = $this->is_manip ? 0 : null;
+            return $result;
+        }
+
+        $connection = $this->db->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $query = 'EXECUTE '.$this->statement;
+        if (!empty($this->positions)) {
+            $parameters = array();
+            foreach ($this->positions as $parameter) {
+                if (!array_key_exists($parameter, $this->values)) {
+                    return $this->db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                        'Unable to bind to missing placeholder: '.$parameter, __FUNCTION__);
+                }
+                $value = $this->values[$parameter];
+                $type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
+                if (is_resource($value) || $type == 'clob' || $type == 'blob' && $this->db->options['lob_allow_url_include']) {
+                    if (!is_resource($value) && preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {
+                        if ($match[1] == 'file://') {
+                            $value = $match[2];
+                        }
+                        $value = @fopen($value, 'r');
+                        $close = true;
+                    }
+                    if (is_resource($value)) {
+                        $data = '';
+                        while (!@feof($value)) {
+                            $data.= @fread($value, $this->db->options['lob_buffer_length']);
+                        }
+                        if ($close) {
+                            @fclose($value);
+                        }
+                        $value = $data;
+                    }
+                }
+                $quoted = $this->db->quote($value, $type);
+                if (PEAR::isError($quoted)) {
+                    return $quoted;
+                }
+                $param_query = 'SET @'.$parameter.' = '.$quoted;
+                $result = $this->db->_doQuery($param_query, true, $connection);
+                if (PEAR::isError($result)) {
+                    return $result;
+                }
+            }
+            $query.= ' USING @'.implode(', @', array_values($this->positions));
+        }
+
+        $result = $this->db->_doQuery($query, $this->is_manip, $connection);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+
+        if ($this->is_manip) {
+            $affected_rows = $this->db->_affectedRows($connection, $result);
+            return $affected_rows;
+        }
+
+        $result =& $this->db->_wrapResult($result, $this->result_types,
+            $result_class, $result_wrap_class, $this->limit, $this->offset);
+        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));
+        return $result;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Release resources allocated for the specified prepared query.
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function free()
+    {
+        if (is_null($this->positions)) {
+            return $this->db->raiseError(MDB2_ERROR, null, null,
+                'Prepared statement has already been freed', __FUNCTION__);
+        }
+        $result = MDB2_OK;
+
+        if (!is_null($this->statement)) {
+            $connection = $this->db->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+            $query = 'DEALLOCATE PREPARE '.$this->statement;
+            $result = $this->db->_doQuery($query, true, $connection);
+        }
+
+        parent::free();
+        return $result;
+    }
+}
 ?>
\ No newline at end of file