- Add support for MDB2's 'sqlsrv' driver (#1486395)

1 files changed, 1546 insertions, 1511 deletions

diff --git a/program/lib/MDB2/Driver/pgsql.php b/program/lib/MDB2/Driver/pgsql.php
index de27bae7d..ca2874d5a 100644
--- a/program/lib/MDB2/Driver/pgsql.php
+++ b/program/lib/MDB2/Driver/pgsql.php
@@ -1,1512 +1,1547 @@
-<?php

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

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

-// | PHP versions 4 and 5                                                 |

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

-// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |

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

-// | All rights reserved.                                                 |

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

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

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

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

-// |                                                                      |

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

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

-// | are met:                                                             |

-// |                                                                      |

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

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

-// |                                                                      |

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

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

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

-// |                                                                      |

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

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

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

-// | written permission.                                                  |

-// |                                                                      |

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

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

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

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

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

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

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

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

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

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

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

-// | POSSIBILITY OF SUCH DAMAGE.                                          |

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

-// | Author: Paul Cooper <pgc@ucecom.com>                                 |

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

-//

-// $Id: pgsql.php,v 1.197 2008/03/08 14:18:39 quipo Exp $

-

-/**

- * MDB2 PostGreSQL driver

- *

- * @package MDB2

- * @category Database

- * @author  Paul Cooper <pgc@ucecom.com>

- */

-class MDB2_Driver_pgsql extends MDB2_Driver_Common

-{

-    // {{{ properties

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

-

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

-    // }}}

-    // {{{ constructor

-

-    /**

-     * Constructor

-     */

-    function __construct()

-    {

-        parent::__construct();

-

-        $this->phptype = 'pgsql';

-        $this->dbsyntax = 'pgsql';

-

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

-

-        $this->options['DBA_username'] = false;

-        $this->options['DBA_password'] = false;

-        $this->options['multi_query'] = false;

-        $this->options['disable_smart_seqname'] = false;

-        $this->options['max_identifiers_length'] = 63;

-    }

-

-    // }}}

-    // {{{ errorInfo()

-

-    /**

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

-     *

-     * @param integer $error

-     * @return array

-     * @access public

-     */

-    function errorInfo($error = null)

-    {

-        // Fall back to MDB2_ERROR if there was no mapping.

-        $error_code = MDB2_ERROR;

-

-        $native_msg = '';

-        if (is_resource($error)) {

-            $native_msg = @pg_result_error($error);

-        } elseif ($this->connection) {

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

-            if (!$native_msg && @pg_connection_status($this->connection) === PGSQL_CONNECTION_BAD) {

-                $native_msg = 'Database connection has been lost.';

-                $error_code = MDB2_ERROR_CONNECT_FAILED;

-            }

-        } else {

-            $native_msg = @pg_last_error();

-        }

-

-        static $error_regexps;

-        if (empty($error_regexps)) {

-            $error_regexps = array(

-                '/column .* (of relation .*)?does not exist/i'

-                    => MDB2_ERROR_NOSUCHFIELD,

-                '/(relation|sequence|table).*does not exist|class .* not found/i'

-                    => MDB2_ERROR_NOSUCHTABLE,

-                '/database .* does not exist/'

-                    => MDB2_ERROR_NOT_FOUND,

-                '/index .* does not exist/'

-                    => MDB2_ERROR_NOT_FOUND,

-                '/database .* already exists/i'

-                    => MDB2_ERROR_ALREADY_EXISTS,

-                '/relation .* already exists/i'

-                    => MDB2_ERROR_ALREADY_EXISTS,

-                '/(divide|division) by zero$/i'

-                    => MDB2_ERROR_DIVZERO,

-                '/pg_atoi: error in .*: can\'t parse /i'

-                    => MDB2_ERROR_INVALID_NUMBER,

-                '/invalid input syntax for( type)? (integer|numeric)/i'

-                    => MDB2_ERROR_INVALID_NUMBER,

-                '/value .* is out of range for type \w*int/i'

-                    => MDB2_ERROR_INVALID_NUMBER,

-                '/integer out of range/i'

-                    => MDB2_ERROR_INVALID_NUMBER,

-                '/value too long for type character/i'

-                    => MDB2_ERROR_INVALID,

-                '/attribute .* not found|relation .* does not have attribute/i'

-                    => MDB2_ERROR_NOSUCHFIELD,

-                '/column .* specified in USING clause does not exist in (left|right) table/i'

-                    => MDB2_ERROR_NOSUCHFIELD,

-                '/parser: parse error at or near/i'

-                    => MDB2_ERROR_SYNTAX,

-                '/syntax error at/'

-                    => MDB2_ERROR_SYNTAX,

-                '/column reference .* is ambiguous/i'

-                    => MDB2_ERROR_SYNTAX,

-                '/permission denied/'

-                    => MDB2_ERROR_ACCESS_VIOLATION,

-                '/violates not-null constraint/'

-                    => MDB2_ERROR_CONSTRAINT_NOT_NULL,

-                '/violates [\w ]+ constraint/'

-                    => MDB2_ERROR_CONSTRAINT,

-                '/referential integrity violation/'

-                    => MDB2_ERROR_CONSTRAINT,

-                '/more expressions than target columns/i'

-                    => MDB2_ERROR_VALUE_COUNT_ON_ROW,

-            );

-        }

-        if (is_numeric($error) && $error < 0) {

-            $error_code = $error;

-        } else {

-            foreach ($error_regexps as $regexp => $code) {

-                if (preg_match($regexp, $native_msg)) {

-                    $error_code = $code;

-                    break;

-                }

-            }

-        }

-        return array($error_code, null, $native_msg);

-    }

-

-    // }}}

-    // {{{ escape()

-

-    /**

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

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

-     *

-     * @param   string  the input string to quote

-     * @param   bool    escape wildcards

-     *

-     * @return  string  quoted string

-     *

-     * @access  public

-     */

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

-    {

-        if ($escape_wildcards) {

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

-        }

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

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

-            return $connection;

-        }

-        if (is_resource($connection) && version_compare(PHP_VERSION, '5.2.0RC5', '>=')) {

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

-        } else {

-            $text = @pg_escape_string($text);

-        }

-        return $text;

-    }

-

-    // }}}

-    // {{{ beginTransaction()

-

-    /**

-     * Start a transaction or set a savepoint.

-     *

-     * @param   string  name of a savepoint to set

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

-     *

-     * @access  public

-     */

-    function beginTransaction($savepoint = null)

-    {

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

-        if (!is_null($savepoint)) {

-            if (!$this->in_transaction) {

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

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

-            }

-            $query = 'SAVEPOINT '.$savepoint;

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

-        } elseif ($this->in_transaction) {

-            return MDB2_OK;  //nothing to do

-        }

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

-            $this->destructor_registered = true;

-            register_shutdown_function('MDB2_closeOpenTransactions');

-        }

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

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

-            return $result;

-        }

-        $this->in_transaction = true;

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ commit()

-

-    /**

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

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

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

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

-     *

-     * @param   string  name of a savepoint to release

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

-     *

-     * @access  public

-     */

-    function commit($savepoint = null)

-    {

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

-        if (!$this->in_transaction) {

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

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

-        }

-        if (!is_null($savepoint)) {

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

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

-        }

-

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

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

-            return $result;

-        }

-        $this->in_transaction = false;

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ rollback()

-

-    /**

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

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

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

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

-     *

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

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

-     *

-     * @access  public

-     */

-    function rollback($savepoint = null)

-    {

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

-        if (!$this->in_transaction) {

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

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

-        }

-        if (!is_null($savepoint)) {

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

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

-        }

-

-        $query = 'ROLLBACK';

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

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

-            return $result;

-        }

-        $this->in_transaction = false;

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ function setTransactionIsolation()

-

-    /**

-     * Set the transacton isolation level.

-     *

-     * @param   string  standard isolation level

-     *                  READ UNCOMMITTED (allows dirty reads)

-     *                  READ COMMITTED (prevents dirty reads)

-     *                  REPEATABLE READ (prevents nonrepeatable reads)

-     *                  SERIALIZABLE (prevents phantom reads)

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

-     *

-     * @access  public

-     * @since   2.1.1

-     */

-    function setTransactionIsolation($isolation)

-    {

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

-        switch ($isolation) {

-        case 'READ UNCOMMITTED':

-        case 'READ COMMITTED':

-        case 'REPEATABLE READ':

-        case 'SERIALIZABLE':

-            break;

-        default:

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

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

-        }

-

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

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

-    }

-

-    // }}}

-    // {{{ _doConnect()

-

-    /**

-     * Do the grunt work of connecting to the database

-     *

-     * @return mixed connection resource on success, MDB2 Error Object on failure

-     * @access protected

-     */

-    function _doConnect($username, $password, $database_name, $persistent = false)

-    {

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

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

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

-        }

-        

-        if ($database_name == '') {

-            $database_name = 'template1';

-        }

-

-        $protocol = $this->dsn['protocol'] ? $this->dsn['protocol'] : 'tcp';

-

-        $params = array('');

-        if ($protocol == 'tcp') {

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

-                $params[0].= 'host=' . $this->dsn['hostspec'];

-            }

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

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

-            }

-        } elseif ($protocol == 'unix') {

-            // Allow for pg socket in non-standard locations.

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

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

-            }

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

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

-            }

-        }

-        if ($database_name) {

-            $params[0].= ' dbname=\'' . addslashes($database_name) . '\'';

-        }

-        if ($username) {

-            $params[0].= ' user=\'' . addslashes($username) . '\'';

-        }

-        if ($password) {

-            $params[0].= ' password=\'' . addslashes($password) . '\'';

-        }

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

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

-        }

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

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

-        }

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

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

-        }

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

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

-        }

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

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

-        }

-

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

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

-        {

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

-                $params[] = PGSQL_CONNECT_FORCE_NEW;

-            }

-        }

-

-        $connect_function = $persistent ? 'pg_pconnect' : 'pg_connect';

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

-        if (!$connection) {

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

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

-        }

-

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

-            if (!@pg_query($connection, "SET SESSION DATESTYLE = 'ISO'")) {

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

-                    'Unable to set date style to iso', __FUNCTION__);

-            }

-       }

-

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

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

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

-                return $result;

-            }

-        }

-

-        return $connection;

-    }

-

-    // }}}

-    // {{{ connect()

-

-    /**

-     * Connect to the database

-     *

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

-     * @access public

-     */

-    function connect()

-    {

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

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

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

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

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

-            ) {

-                return MDB2_OK;

-            }

-            $this->disconnect(false);

-        }

-

-        if ($this->database_name) {

-            $connection = $this->_doConnect($this->dsn['username'],

-                                            $this->dsn['password'],

-                                            $this->database_name,

-                                            $this->options['persistent']);

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

-                return $connection;

-            }

-

-            $this->connection = $connection;

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

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

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

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

-        }

-

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ setCharset()

-

-    /**

-     * Set the charset on the current connection

-     *

-     * @param string    charset

-     * @param resource  connection handle

-     *

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

-     */

-    function setCharset($charset, $connection = null)

-    {

-        if (is_null($connection)) {

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

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

-                return $connection;

-            }

-        }

-        if (is_array($charset)) {

-            $charset   = array_shift($charset);

-            $this->warnings[] = 'postgresql does not support setting client collation';

-        }

-        $result = @pg_set_client_encoding($connection, $charset);

-        if ($result == -1) {

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

-                'Unable to set client charset: '.$charset, __FUNCTION__);

-        }

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ databaseExists()

-

-    /**

-     * check if given database name is exists?

-     *

-     * @param string $name    name of the database that should be checked

-     *

-     * @return mixed true/false on success, a MDB2 error on failure

-     * @access public

-     */

-    function databaseExists($name)

-    {

-        $res = $this->_doConnect($this->dsn['username'],

-                                 $this->dsn['password'],

-                                 $this->escape($name),

-                                 $this->options['persistent']);

-        if (!PEAR::isError($res)) {

-            return true;

-        }

-

-        return false;

-    }

-

-    // }}}

-    // {{{ disconnect()

-

-    /**

-     * Log out and disconnect from the database.

-     *

-     * @param  boolean $force if the disconnect should be forced even if the

-     *                        connection is opened persistently

-     * @return mixed true on success, false if not connected and error

-     *                object on error

-     * @access public

-     */

-    function disconnect($force = true)

-    {

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

-            if ($this->in_transaction) {

-                $dsn = $this->dsn;

-                $database_name = $this->database_name;

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

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

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

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

-                $this->rollback();

-                $this->dsn = $dsn;

-                $this->database_name = $database_name;

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

-            }

-

-            if (!$this->opened_persistent || $force) {

-                @pg_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->database_name, $this->options['persistent']);

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

-            return $connection;

-        }

-

-        $offset = $this->offset;

-        $limit = $this->limit;

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

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

-

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

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

-            if ($is_manip) {

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

-            } else {

-                $result =& $this->_wrapResult($result, $types, true, false, $limit, $offset);

-            }

-        }

-

-        @pg_close($connection);

-        return $result;

-    }

-

-    // }}}

-    // {{{ _doQuery()

-

-    /**

-     * Execute a query

-     * @param string $query  query

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

-     * @param resource $connection

-     * @param string $database_name

-     * @return result or error object

-     * @access protected

-     */

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

-    {

-        $this->last_query = $query;

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

-        if ($result) {

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

-                return $result;

-            }

-            $query = $result;

-        }

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

-            $result = $is_manip ? 0 : null;

-            return $result;

-        }

-

-        if (is_null($connection)) {

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

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

-                return $connection;

-            }

-        }

-

-        $function = $this->options['multi_query'] ? 'pg_send_query' : 'pg_query';

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

-        if (!$result) {

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

-                'Could not execute statement', __FUNCTION__);

-            return $err;

-        } elseif ($this->options['multi_query']) {

-            if (!($result = @pg_get_result($connection))) {

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

-                        'Could not get the first result from a multi query', __FUNCTION__);

-                return $err;

-            }

-        }

-

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

-        return $result;

-    }

-

-    // }}}

-    // {{{ _affectedRows()

-

-    /**

-     * Returns the number of rows affected

-     *

-     * @param resource $result

-     * @param resource $connection

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

-     * @access private

-     */

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

-    {

-        if (is_null($connection)) {

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

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

-                return $connection;

-            }

-        }

-        return @pg_affected_rows($result);

-    }

-

-    // }}}

-    // {{{ _modifyQuery()

-

-    /**

-     * Changes a query string for various DBMS specific reasons

-     *

-     * @param string $query  query to modify

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

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

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

-     * @return string modified query

-     * @access protected

-     */

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

-    {

-        if ($limit > 0

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

-        ) {

-            $query = rtrim($query);

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

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

-            }

-            if ($is_manip) {

-                $query = $this->_modifyManipQuery($query, $limit);

-            } else {

-                $query.= " LIMIT $limit OFFSET $offset";

-            }

-        }

-        return $query;

-    }

-    

-    // }}}

-    // {{{ _modifyManipQuery()

-    

-    /**

-     * Changes a manip query string for various DBMS specific reasons

-     *

-     * @param string $query  query to modify

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

-     * @return string modified query

-     * @access protected

-     */

-    function _modifyManipQuery($query, $limit)

-    {

-        $pos = strpos(strtolower($query), 'where');

-        $where = $pos ? substr($query, $pos) : '';

-

-        $manip_clause = '(\bDELETE\b\s+(?:\*\s+)?\bFROM\b|\bUPDATE\b)';

-        $from_clause  = '([\w\.]+)';

-        $where_clause = '(?:(.*)\bWHERE\b\s+(.*))|(.*)';

-        $pattern = '/^'. $manip_clause . '\s+' . $from_clause .'(?:\s)*(?:'. $where_clause .')?$/i';

-        $matches = preg_match($pattern, $query, $match);

-        if ($matches) {

-            $manip = $match[1];

-            $from  = $match[2];

-            $what  = (count($matches) == 6) ? $match[5] : $match[3];

-            return $manip.' '.$from.' '.$what.' WHERE ctid=(SELECT ctid FROM '.$from.' '.$where.' LIMIT '.$limit.')';

-        }

-        //return error?

-        return $query;

-    }

-

-    // }}}

-    // {{{ getServerVersion()

-

-    /**

-     * return version information about the server

-     *

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

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

-     * @access public

-     */

-    function getServerVersion($native = false)

-    {

-        $query = 'SHOW SERVER_VERSION';

-        if ($this->connected_server_info) {

-            $server_info = $this->connected_server_info;

-        } else {

-            $server_info = $this->queryOne($query, 'text');

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

-                return $server_info;

-            }

-        }

-        // cache server_info

-        $this->connected_server_info = $server_info;

-        if (!$native && !PEAR::isError($server_info)) {

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

-            if (empty($tmp[2])

-                && isset($tmp[1])

-                && preg_match('/(\d+)(.*)/', $tmp[1], $tmp2)

-            ) {

-                $server_info = array(

-                    'major' => $tmp[0],

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

-                    'patch' => null,

-                    'extra' => $tmp2[2],

-                    'native' => $server_info,

-                );

-            } else {

-                $server_info = array(

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

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

-                    'patch' => isset($tmp[2]) ? $tmp[2] : null,

-                    'extra' => null,

-                    'native' => $server_info,

-                );

-            }

-        }

-        return $server_info;

-    }

-

-    // }}}

-    // {{{ prepare()

-

-    /**

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

-     * With some database backends, this is emulated.

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

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

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

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

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

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

-     *

-     * @param string $query the query to prepare

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

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

-     *                        the result set or MDB2_PREPARE_RESULT, if set to

-     *                        MDB2_PREPARE_MANIP the query is handled as a manipulation query

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

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

-     *        error on failure

-     * @access public

-     * @see bindParam, execute

-     */

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

-    {

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

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

-            return $obj;

-        }

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

-        $offset = $this->offset;

-        $limit = $this->limit;

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

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

-        if ($result) {

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

-                return $result;

-            }

-            $query = $result;

-        }

-        $pgtypes = function_exists('pg_prepare') ? false : array();

-        if ($pgtypes !== false && !empty($types)) {

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

-        }

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

-        $placeholder_type_guess = $placeholder_type = null;

-        $question = '?';

-        $colon = ':';

-        $positions = array();

-        $position = $parameter = 0;

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

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

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

-            //skip "::type" cast ("select id::varchar(20) from sometable where name=?")

-            $doublecolon_position = strpos($query, '::', $position);

-            if ($doublecolon_position !== false && $doublecolon_position == $c_position) {

-                $c_position = strpos($query, $colon, $position+2);

-            }

-            if ($q_position && $c_position) {

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

-            } elseif ($q_position) {

-                $p_position = $q_position;

-            } elseif ($c_position) {

-                $p_position = $c_position;

-            } else {

-                break;

-            }

-            if (is_null($placeholder_type)) {

-                $placeholder_type_guess = $query[$p_position];

-            }

-            

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

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

-                return $new_pos;

-            }

-            if ($new_pos != $position) {

-                $position = $new_pos;

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

-            }

-

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

-                if (is_null($placeholder_type)) {

-                    $placeholder_type = $query[$p_position];

-                    $question = $colon = $placeholder_type;

-                    if (!empty($types) && is_array($types)) {

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

-                        } else {

-                            $types = array_values($types);

-                        }

-                    }

-                }

-                if ($placeholder_type_guess == '?') {

-                    $length = 1;

-                    $name = $parameter;

-                } else {

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

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

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

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

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

-                        return $err;

-                    }

-                    $length = strlen($param) + 1;

-                    $name = $param;

-                }

-                if ($pgtypes !== false) {

-                    if (is_array($types) && array_key_exists($name, $types)) {

-                        $pgtypes[] = $this->datatype->mapPrepareDatatype($types[$name]);

-                    } elseif (is_array($types) && array_key_exists($parameter, $types)) {

-                        $pgtypes[] = $this->datatype->mapPrepareDatatype($types[$parameter]);

-                    } else {

-                        $pgtypes[] = 'text';

-                    }

-                }

-                if (($key_parameter = array_search($name, $positions))) {

-                    $next_parameter = 1;

-                    foreach ($positions as $key => $value) {

-                        if ($key_parameter == $key) {

-                            break;

-                        }

-                        ++$next_parameter;

-                    }

-                } else {

-                    ++$parameter;

-                    $next_parameter = $parameter;

-                    $positions[] = $name;

-                }

-                $query = substr_replace($query, '$'.$parameter, $position, $length);

-                $position = $p_position + strlen($parameter);

-            } else {

-                $position = $p_position;

-            }

-        }

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

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

-            return $connection;

-        }

-        static $prep_statement_counter = 1;

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

-        $statement_name = substr(strtolower($statement_name), 0, $this->options['max_identifiers_length']);

-        if ($pgtypes === false) {

-            $result = @pg_prepare($connection, $statement_name, $query);

-            if (!$result) {

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

-                    'Unable to create prepared statement handle', __FUNCTION__);

-                return $err;

-            }

-        } else {

-            $types_string = '';

-            if ($pgtypes) {

-                $types_string = ' ('.implode(', ', $pgtypes).') ';

-            }

-            $query = 'PREPARE '.$statement_name.$types_string.' AS '.$query;

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

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

-                return $statement;

-            }

-        }

-

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

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

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

-        return $obj;

-    }

-

-    // }}}

-    // {{{ function getSequenceName($sqn)

-

-    /**

-     * adds sequence name formatting to a sequence name

-     *

-     * @param   string  name of the sequence

-     *

-     * @return  string  formatted sequence name

-     *

-     * @access  public

-     */

-    function getSequenceName($sqn)

-    {

-        if (false === $this->options['disable_smart_seqname']) {

-            if (strpos($sqn, '_') !== false) {

-                list($table, $field) = explode('_', $sqn, 2);

-            }

-            $schema_list = $this->queryOne("SELECT array_to_string(current_schemas(false), ',')");

-            if (PEAR::isError($schema_list) || empty($schema_list) || count($schema_list) < 2) {

-                $order_by = ' a.attnum';

-                $schema_clause = ' AND n.nspname=current_schema()';

-            } else {

-                $schemas = explode(',', $schema_list);

-                $schema_clause = ' AND n.nspname IN ('.$schema_list.')';

-                $counter = 1;

-                $order_by = ' CASE ';

-                foreach ($schemas as $schema) {

-                    $order_by .= ' WHEN n.nspname='.$schema.' THEN '.$counter++;

-                }

-                $order_by .= ' ELSE '.$counter.' END, a.attnum';

-            }

-

-            $query = "SELECT substring((SELECT substring(pg_get_expr(d.adbin, d.adrelid) for 128)

-                    	    FROM pg_attrdef d

-                    	   WHERE d.adrelid = a.attrelid

-                    	     AND d.adnum = a.attnum

-                    	     AND a.atthasdef

-                    	 ) FROM 'nextval[^'']*''([^'']*)')

-                        FROM pg_attribute a

-                    LEFT JOIN pg_class c ON c.oid = a.attrelid

-                    LEFT JOIN pg_attrdef d ON d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef

-                    LEFT JOIN pg_namespace n ON c.relnamespace = n.oid

-                       WHERE (c.relname = ".$this->quote($sqn, 'text');

-            if (!empty($field)) {

-                $query .= " OR (c.relname = ".$this->quote($table, 'text')." AND a.attname = ".$this->quote($field, 'text').")";

-            }

-            $query .= "      )"

-                         .$schema_clause."

-                         AND NOT a.attisdropped

-                         AND a.attnum > 0

-                         AND pg_get_expr(d.adbin, d.adrelid) LIKE 'nextval%'

-                    ORDER BY ".$order_by;

-            $seqname = $this->queryOne($query);

-            if (!PEAR::isError($seqname) && !empty($seqname) && is_string($seqname)) {

-                return $seqname;

-            }

-        }

-

-        return sprintf($this->options['seqname_format'],

-            preg_replace('/[^\w\$.]/i', '_', $sqn));

-    }

-

-    // }}}

-    // {{{ nextID()

-

-    /**

-     * Returns the next free id of a sequence

-     *

-     * @param string $seq_name name of the sequence

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

-     *                          automatic created, if it

-     *                          not exists

-     * @return mixed MDB2 Error Object or id

-     * @access public

-     */

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

-    {

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

-        $query = "SELECT NEXTVAL('$sequence_name')";

-        $this->pushErrorHandling(PEAR_ERROR_RETURN);

-        $this->expectError(MDB2_ERROR_NOSUCHTABLE);

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

-        $this->popExpect();

-        $this->popErrorHandling();

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

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

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

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

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

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

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

-                }

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

-            }

-        }

-        return $result;

-    }

-

-    // }}}

-    // {{{ lastInsertID()

-

-    /**

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

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

-     *

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

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

-     * @return mixed MDB2 Error Object or id

-     * @access public

-     */

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

-    {

-        if (empty($table) && empty($field)) {

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

-        }

-        $seq = $table.(empty($field) ? '' : '_'.$field);

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

-        return $this->queryOne("SELECT currval('$sequence_name')", 'integer');

-    }

-

-    // }}}

-    // {{{ currID()

-

-    /**

-     * Returns the current id of a sequence

-     *

-     * @param string $seq_name name of the sequence

-     * @return mixed MDB2 Error Object or id

-     * @access public

-     */

-    function currID($seq_name)

-    {

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

-        return $this->queryOne("SELECT last_value FROM $sequence_name", 'integer');

-    }

-}

-

-/**

- * MDB2 PostGreSQL result driver

- *

- * @package MDB2

- * @category Database

- * @author  Paul Cooper <pgc@ucecom.com>

- */

-class MDB2_Result_pgsql extends MDB2_Result_Common

-{

-    // }}}

-    // {{{ fetchRow()

-

-    /**

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

-     *

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

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

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

-     * @access public

-     */

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

-    {

-        if (!is_null($rownum)) {

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

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

-                return $seek;

-            }

-        }

-        if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {

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

-        }

-        if ($fetchmode & MDB2_FETCHMODE_ASSOC) {

-            $row = @pg_fetch_array($this->result, null, PGSQL_ASSOC);

-            if (is_array($row)

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

-            ) {

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

-            }

-        } else {

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

-        }

-        if (!$row) {

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

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

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

-                return $err;

-            }

-            $null = null;

-            return $null;

-        }

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

-        $rtrim = false;

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

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

-                $mode += MDB2_PORTABILITY_RTRIM;

-            } else {

-                $rtrim = true;

-            }

-        }

-        if ($mode) {

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

-        }

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

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

-        }

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

-            $this->_assignBindColumns($row);

-        }

-        if ($fetchmode === MDB2_FETCHMODE_OBJECT) {

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

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

-                $row = (object) $row;

-            } else {

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

-            }

-        }

-        ++$this->rownum;

-        return $row;

-    }

-

-    // }}}

-    // {{{ _getColumnNames()

-

-    /**

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

-     *

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

-     *                  or an MDB2 error on failure.

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

-     *                  does not contain any rows.

-     * @access private

-     */

-    function _getColumnNames()

-    {

-        $columns = array();

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

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

-            return $numcols;

-        }

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

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

-            $columns[$column_name] = $column;

-        }

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

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

-        }

-        return $columns;

-    }

-

-    // }}}

-    // {{{ numCols()

-

-    /**

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

-     *

-     * @access public

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

-     *                       on failure

-     */

-    function numCols()

-    {

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

-        if (is_null($cols)) {

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

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

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

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

-                return count($this->types);

-            }

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

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

-        }

-        return $cols;

-    }

-

-    // }}}

-    // {{{ nextResult()

-

-    /**

-     * Move the internal result pointer to the next available result

-     *

-     * @return true on success, false if there is no more result set or an error object on failure

-     * @access public

-     */

-    function nextResult()

-    {

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

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

-            return $connection;

-        }

-

-        if (!($this->result = @pg_get_result($connection))) {

-            return false;

-        }

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ free()

-

-    /**

-     * Free the internal resources associated with result.

-     *

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

-     * @access public

-     */

-    function free()

-    {

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

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

-            if ($free === false) {

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

-                    'Could not free result', __FUNCTION__);

-            }

-        }

-        $this->result = false;

-        return MDB2_OK;

-    }

-}

-

-/**

- * MDB2 PostGreSQL buffered result driver

- *

- * @package MDB2

- * @category Database

- * @author  Paul Cooper <pgc@ucecom.com>

- */

-class MDB2_BufferedResult_pgsql extends MDB2_Result_pgsql

-{

-    // {{{ seek()

-

-    /**

-     * Seek to a specific row in a result set

-     *

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

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

-     * @access public

-     */

-    function seek($rownum = 0)

-    {

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

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

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

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

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

-                return MDB2_OK;

-            }

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

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

-        }

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

-        return MDB2_OK;

-    }

-

-    // }}}

-    // {{{ valid()

-

-    /**

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

-     *

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

-     * @access public

-     */

-    function valid()

-    {

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

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

-            return $numrows;

-        }

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

-    }

-

-    // }}}

-    // {{{ numRows()

-

-    /**

-     * Returns the number of rows in a result object

-     *

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

-     * @access public

-     */

-    function numRows()

-    {

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

-        if (is_null($rows)) {

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

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

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

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

-                return 0;

-            }

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

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

-        }

-        return $rows;

-    }

-}

-

-/**

- * MDB2 PostGreSQL statement driver

- *

- * @package MDB2

- * @category Database

- * @author  Paul Cooper <pgc@ucecom.com>

- */

-class MDB2_Statement_pgsql extends MDB2_Statement_Common

-{

-    // {{{ _execute()

-

-    /**

-     * Execute a prepared query statement helper method.

-     *

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

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

-     * @return mixed 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 = false;

-        $parameters = array();

-        // todo: disabled until pg_execute() bytea issues are cleared up

-        if (true || !function_exists('pg_execute')) {

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

-        }

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

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

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

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

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

-                }

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

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

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

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

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

-                            $value = $match[2];

-                        }

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

-                        $close = true;

-                    }

-                    if (is_resource($value)) {

-                        $data = '';

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

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

-                        }

-                        if ($close) {

-                            @fclose($value);

-                        }

-                        $value = $data;

-                    }

-                }

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

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

-                    return $quoted;

-                }

-                $parameters[] = $quoted;

-            }

-            if ($query) {

-                $query.= ' ('.implode(', ', $parameters).')';

-            }

-        }

-

-        if (!$query) {

-            $result = @pg_execute($connection, $this->statement, $parameters);

-            if (!$result) {

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

-                    'Unable to execute statement', __FUNCTION__);

-                return $err;

-            }

-        } else {

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

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

-                return $result;

-            }

-        }

-

-        if ($this->is_manip) {

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

-            return $affected_rows;

-        }

-

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

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

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

-        return $result;

-    }

-

-    // }}}

-    // {{{ free()

-

-    /**

-     * Release resources allocated for the specified prepared query.

-     *

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

-     * @access public

-     */

-    function free()

-    {

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

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

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

-        }

-        $result = MDB2_OK;

-

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

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

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

-                return $connection;

-            }

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

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

-        }

-

-        parent::free();

-        return $result;

-    }

-}

+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
+// | Stig. S. Bakken, Lukas Smith                                         |
+// | All rights reserved.                                                 |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
+// | API as well as database abstraction for PHP applications.            |
+// | This LICENSE is in the BSD license style.                            |
+// |                                                                      |
+// | Redistribution and use in source and binary forms, with or without   |
+// | modification, are permitted provided that the following conditions   |
+// | are met:                                                             |
+// |                                                                      |
+// | Redistributions of source code must retain the above copyright       |
+// | notice, this list of conditions and the following disclaimer.        |
+// |                                                                      |
+// | Redistributions in binary form must reproduce the above copyright    |
+// | notice, this list of conditions and the following disclaimer in the  |
+// | documentation and/or other materials provided with the distribution. |
+// |                                                                      |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission.                                                  |
+// |                                                                      |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
+// | POSSIBILITY OF SUCH DAMAGE.                                          |
+// +----------------------------------------------------------------------+
+// | Author: Paul Cooper <pgc@ucecom.com>                                 |
+// +----------------------------------------------------------------------+
+//
+// $Id: pgsql.php 292715 2009-12-28 14:06:34Z quipo $
+
+/**
+ * MDB2 PostGreSQL driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Driver_pgsql extends MDB2_Driver_Common
+{
+    // {{{ properties
+    var $string_quoting = array('start' => "'", 'end' => "'", 'escape' => "'", 'escape_pattern' => '\\');
+
+    var $identifier_quoting = array('start' => '"', 'end' => '"', 'escape' => '"');
+    // }}}
+    // {{{ constructor
+
+    /**
+     * Constructor
+     */
+    function __construct()
+    {
+        parent::__construct();
+
+        $this->phptype = 'pgsql';
+        $this->dbsyntax = 'pgsql';
+
+        $this->supported['sequences'] = true;
+        $this->supported['indexes'] = true;
+        $this->supported['affected_rows'] = true;
+        $this->supported['summary_functions'] = true;
+        $this->supported['order_by_text'] = true;
+        $this->supported['transactions'] = true;
+        $this->supported['savepoints'] = true;
+        $this->supported['current_id'] = true;
+        $this->supported['limit_queries'] = true;
+        $this->supported['LOBs'] = true;
+        $this->supported['replace'] = 'emulated';
+        $this->supported['sub_selects'] = true;
+        $this->supported['triggers'] = true;
+        $this->supported['auto_increment'] = 'emulated';
+        $this->supported['primary_key'] = true;
+        $this->supported['result_introspection'] = true;
+        $this->supported['prepared_statements'] = true;
+        $this->supported['identifier_quoting'] = true;
+        $this->supported['pattern_escaping'] = true;
+        $this->supported['new_link'] = true;
+
+        $this->options['DBA_username'] = false;
+        $this->options['DBA_password'] = false;
+        $this->options['multi_query'] = false;
+        $this->options['disable_smart_seqname'] = true;
+        $this->options['max_identifiers_length'] = 63;
+    }
+
+    // }}}
+    // {{{ errorInfo()
+
+    /**
+     * This method is used to collect information about an error
+     *
+     * @param integer $error
+     * @return array
+     * @access public
+     */
+    function errorInfo($error = null)
+    {
+        // Fall back to MDB2_ERROR if there was no mapping.
+        $error_code = MDB2_ERROR;
+
+        $native_msg = '';
+        if (is_resource($error)) {
+            $native_msg = @pg_result_error($error);
+        } elseif ($this->connection) {
+            $native_msg = @pg_last_error($this->connection);
+            if (!$native_msg && @pg_connection_status($this->connection) === PGSQL_CONNECTION_BAD) {
+                $native_msg = 'Database connection has been lost.';
+                $error_code = MDB2_ERROR_CONNECT_FAILED;
+            }
+        } else {
+            $native_msg = @pg_last_error();
+        }
+
+        static $error_regexps;
+        if (empty($error_regexps)) {
+            $error_regexps = array(
+                '/column .* (of relation .*)?does not exist/i'
+                    => MDB2_ERROR_NOSUCHFIELD,
+                '/(relation|sequence|table).*does not exist|class .* not found/i'
+                    => MDB2_ERROR_NOSUCHTABLE,
+                '/database .* does not exist/'
+                    => MDB2_ERROR_NOT_FOUND,
+                '/constraint .* does not exist/'
+                    => MDB2_ERROR_NOT_FOUND,
+                '/index .* does not exist/'
+                    => MDB2_ERROR_NOT_FOUND,
+                '/database .* already exists/i'
+                    => MDB2_ERROR_ALREADY_EXISTS,
+                '/relation .* already exists/i'
+                    => MDB2_ERROR_ALREADY_EXISTS,
+                '/(divide|division) by zero$/i'
+                    => MDB2_ERROR_DIVZERO,
+                '/pg_atoi: error in .*: can\'t parse /i'
+                    => MDB2_ERROR_INVALID_NUMBER,
+                '/invalid input syntax for( type)? (integer|numeric)/i'
+                    => MDB2_ERROR_INVALID_NUMBER,
+                '/value .* is out of range for type \w*int/i'
+                    => MDB2_ERROR_INVALID_NUMBER,
+                '/integer out of range/i'
+                    => MDB2_ERROR_INVALID_NUMBER,
+                '/value too long for type character/i'
+                    => MDB2_ERROR_INVALID,
+                '/attribute .* not found|relation .* does not have attribute/i'
+                    => MDB2_ERROR_NOSUCHFIELD,
+                '/column .* specified in USING clause does not exist in (left|right) table/i'
+                    => MDB2_ERROR_NOSUCHFIELD,
+                '/parser: parse error at or near/i'
+                    => MDB2_ERROR_SYNTAX,
+                '/syntax error at/'
+                    => MDB2_ERROR_SYNTAX,
+                '/column reference .* is ambiguous/i'
+                    => MDB2_ERROR_SYNTAX,
+                '/permission denied/'
+                    => MDB2_ERROR_ACCESS_VIOLATION,
+                '/violates not-null constraint/'
+                    => MDB2_ERROR_CONSTRAINT_NOT_NULL,
+                '/violates [\w ]+ constraint/'
+                    => MDB2_ERROR_CONSTRAINT,
+                '/referential integrity violation/'
+                    => MDB2_ERROR_CONSTRAINT,
+                '/more expressions than target columns/i'
+                    => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+            );
+        }
+        if (is_numeric($error) && $error < 0) {
+            $error_code = $error;
+        } else {
+            foreach ($error_regexps as $regexp => $code) {
+                if (preg_match($regexp, $native_msg)) {
+                    $error_code = $code;
+                    break;
+                }
+            }
+        }
+        return array($error_code, null, $native_msg);
+    }
+
+    // }}}
+    // {{{ escape()
+
+    /**
+     * Quotes a string so it can be safely used in a query. It will quote
+     * the text so it can safely be used within a query.
+     *
+     * @param   string  the input string to quote
+     * @param   bool    escape wildcards
+     *
+     * @return  string  quoted string
+     *
+     * @access  public
+     */
+    function escape($text, $escape_wildcards = false)
+    {
+        if ($escape_wildcards) {
+            $text = $this->escapePattern($text);
+        }
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        if (is_resource($connection) && version_compare(PHP_VERSION, '5.2.0RC5', '>=')) {
+            $text = @pg_escape_string($connection, $text);
+        } else {
+            $text = @pg_escape_string($text);
+        }
+        return $text;
+    }
+
+    // }}}
+    // {{{ beginTransaction()
+
+    /**
+     * Start a transaction or set a savepoint.
+     *
+     * @param   string  name of a savepoint to set
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function beginTransaction($savepoint = null)
+    {
+        $this->debug('Starting transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (null !== $savepoint) {
+            if (!$this->in_transaction) {
+                return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                    'savepoint cannot be released when changes are auto committed', __FUNCTION__);
+            }
+            $query = 'SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        }
+        if ($this->in_transaction) {
+            return MDB2_OK;  //nothing to do
+        }
+        if (!$this->destructor_registered && $this->opened_persistent) {
+            $this->destructor_registered = true;
+            register_shutdown_function('MDB2_closeOpenTransactions');
+        }
+        $result =& $this->_doQuery('BEGIN', true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = true;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ commit()
+
+    /**
+     * Commit the database changes done during a transaction that is in
+     * progress or release a savepoint. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after committing the pending changes.
+     *
+     * @param   string  name of a savepoint to release
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function commit($savepoint = null)
+    {
+        $this->debug('Committing transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'commit/release savepoint cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (null !== $savepoint) {
+            $query = 'RELEASE SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        }
+
+        $result =& $this->_doQuery('COMMIT', true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ rollback()
+
+    /**
+     * Cancel any database changes done during a transaction or since a specific
+     * savepoint that is in progress. This function may only be called when
+     * auto-committing is disabled, otherwise it will fail. Therefore, a new
+     * transaction is implicitly started after canceling the pending changes.
+     *
+     * @param   string  name of a savepoint to rollback to
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     */
+    function rollback($savepoint = null)
+    {
+        $this->debug('Rolling back transaction/savepoint', __FUNCTION__, array('is_manip' => true, 'savepoint' => $savepoint));
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR_INVALID, null, null,
+                'rollback cannot be done changes are auto committed', __FUNCTION__);
+        }
+        if (null !== $savepoint) {
+            $query = 'ROLLBACK TO SAVEPOINT '.$savepoint;
+            return $this->_doQuery($query, true);
+        }
+
+        $query = 'ROLLBACK';
+        $result =& $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ function setTransactionIsolation()
+
+    /**
+     * Set the transacton isolation level.
+     *
+     * @param   string  standard isolation level
+     *                  READ UNCOMMITTED (allows dirty reads)
+     *                  READ COMMITTED (prevents dirty reads)
+     *                  REPEATABLE READ (prevents nonrepeatable reads)
+     *                  SERIALIZABLE (prevents phantom reads)
+     * @return  mixed   MDB2_OK on success, a MDB2 error on failure
+     *
+     * @access  public
+     * @since   2.1.1
+     */
+    function setTransactionIsolation($isolation)
+    {
+        $this->debug('Setting transaction isolation level', __FUNCTION__, array('is_manip' => true));
+        switch ($isolation) {
+        case 'READ UNCOMMITTED':
+        case 'READ COMMITTED':
+        case 'REPEATABLE READ':
+        case 'SERIALIZABLE':
+            break;
+        default:
+            return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+                'isolation level is not supported: '.$isolation, __FUNCTION__);
+        }
+
+        $query = "SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL $isolation";
+        return $this->_doQuery($query, true);
+    }
+
+    // }}}
+    // {{{ _doConnect()
+
+    /**
+     * Do the grunt work of connecting to the database
+     *
+     * @return mixed connection resource on success, MDB2 Error Object on failure
+     * @access protected
+     */
+    function _doConnect($username, $password, $database_name, $persistent = false)
+    {
+        if (!PEAR::loadExtension($this->phptype)) {
+            return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'extension '.$this->phptype.' is not compiled into PHP', __FUNCTION__);
+        }
+        
+        if ($database_name == '') {
+            $database_name = 'template1';
+        }
+
+        $protocol = $this->dsn['protocol'] ? $this->dsn['protocol'] : 'tcp';
+
+        $params = array('');
+        if ($protocol == 'tcp') {
+            if ($this->dsn['hostspec']) {
+                $params[0].= 'host=' . $this->dsn['hostspec'];
+            }
+            if ($this->dsn['port']) {
+                $params[0].= ' port=' . $this->dsn['port'];
+            }
+        } elseif ($protocol == 'unix') {
+            // Allow for pg socket in non-standard locations.
+            if ($this->dsn['socket']) {
+                $params[0].= 'host=' . $this->dsn['socket'];
+            }
+            if ($this->dsn['port']) {
+                $params[0].= ' port=' . $this->dsn['port'];
+            }
+        }
+        if ($database_name) {
+            $params[0].= ' dbname=\'' . addslashes($database_name) . '\'';
+        }
+        if ($username) {
+            $params[0].= ' user=\'' . addslashes($username) . '\'';
+        }
+        if ($password) {
+            $params[0].= ' password=\'' . addslashes($password) . '\'';
+        }
+        if (!empty($this->dsn['options'])) {
+            $params[0].= ' options=' . $this->dsn['options'];
+        }
+        if (!empty($this->dsn['tty'])) {
+            $params[0].= ' tty=' . $this->dsn['tty'];
+        }
+        if (!empty($this->dsn['connect_timeout'])) {
+            $params[0].= ' connect_timeout=' . $this->dsn['connect_timeout'];
+        }
+        if (!empty($this->dsn['sslmode'])) {
+            $params[0].= ' sslmode=' . $this->dsn['sslmode'];
+        }
+        if (!empty($this->dsn['service'])) {
+            $params[0].= ' service=' . $this->dsn['service'];
+        }
+
+        if ($this->_isNewLinkSet()) {
+            if (version_compare(phpversion(), '4.3.0', '>=')) {
+                $params[] = PGSQL_CONNECT_FORCE_NEW;
+            }
+        }
+
+        $connect_function = $persistent ? 'pg_pconnect' : 'pg_connect';
+        $connection = @call_user_func_array($connect_function, $params);
+        if (!$connection) {
+            return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+                'unable to establish a connection', __FUNCTION__);
+        }
+
+       if (empty($this->dsn['disable_iso_date'])) {
+            if (!@pg_query($connection, "SET SESSION DATESTYLE = 'ISO'")) {
+                return $this->raiseError(null, null, null,
+                    'Unable to set date style to iso', __FUNCTION__);
+            }
+       }
+
+        if (!empty($this->dsn['charset'])) {
+            $result = $this->setCharset($this->dsn['charset'], $connection);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+
+        // Enable extra compatibility settings on 8.2 and later
+        if (function_exists('pg_parameter_status')) {
+            $version = pg_parameter_status($connection, 'server_version');
+            if ($version == false) {
+                return $this->raiseError(null, null, null,
+                  'Unable to retrieve server version', __FUNCTION__);
+            }
+            $version = explode ('.', $version);
+            if (    $version['0'] > 8
+                || ($version['0'] == 8 && $version['1'] >= 2)
+            ) {
+                if (!@pg_query($connection, "SET SESSION STANDARD_CONFORMING_STRINGS = OFF")) {
+                    return $this->raiseError(null, null, null,
+                      'Unable to set standard_conforming_strings to off', __FUNCTION__);
+                }
+
+                if (!@pg_query($connection, "SET SESSION ESCAPE_STRING_WARNING = OFF")) {
+                    return $this->raiseError(null, null, null,
+                      'Unable to set escape_string_warning to off', __FUNCTION__);
+                }
+            }
+        }
+
+        return $connection;
+    }
+
+    // }}}
+    // {{{ connect()
+
+    /**
+     * Connect to the database
+     *
+     * @return true on success, MDB2 Error Object on failure
+     * @access public
+     */
+    function connect()
+    {
+        if (is_resource($this->connection)) {
+            //if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
+            if (MDB2::areEquals($this->connected_dsn, $this->dsn)
+                && $this->connected_database_name == $this->database_name
+                && ($this->opened_persistent == $this->options['persistent'])
+            ) {
+                return MDB2_OK;
+            }
+            $this->disconnect(false);
+        }
+
+        if ($this->database_name) {
+            $connection = $this->_doConnect($this->dsn['username'],
+                                            $this->dsn['password'],
+                                            $this->database_name,
+                                            $this->options['persistent']);
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+
+            $this->connection = $connection;
+            $this->connected_dsn = $this->dsn;
+            $this->connected_database_name = $this->database_name;
+            $this->opened_persistent = $this->options['persistent'];
+            $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
+        }
+
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ setCharset()
+
+    /**
+     * Set the charset on the current connection
+     *
+     * @param string    charset
+     * @param resource  connection handle
+     *
+     * @return true on success, MDB2 Error Object on failure
+     */
+    function setCharset($charset, $connection = null)
+    {
+        if (null === $connection) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        if (is_array($charset)) {
+            $charset   = array_shift($charset);
+            $this->warnings[] = 'postgresql does not support setting client collation';
+        }
+        $result = @pg_set_client_encoding($connection, $charset);
+        if ($result == -1) {
+            return $this->raiseError(null, null, null,
+                'Unable to set client charset: '.$charset, __FUNCTION__);
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ databaseExists()
+
+    /**
+     * check if given database name is exists?
+     *
+     * @param string $name    name of the database that should be checked
+     *
+     * @return mixed true/false on success, a MDB2 error on failure
+     * @access public
+     */
+    function databaseExists($name)
+    {
+        $res = $this->_doConnect($this->dsn['username'],
+                                 $this->dsn['password'],
+                                 $this->escape($name),
+                                 $this->options['persistent']);
+        if (!PEAR::isError($res)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    // }}}
+    // {{{ disconnect()
+
+    /**
+     * Log out and disconnect from the database.
+     *
+     * @param  boolean $force if the disconnect should be forced even if the
+     *                        connection is opened persistently
+     * @return mixed true on success, false if not connected and error
+     *                object on error
+     * @access public
+     */
+    function disconnect($force = true)
+    {
+        if (is_resource($this->connection)) {
+            if ($this->in_transaction) {
+                $dsn = $this->dsn;
+                $database_name = $this->database_name;
+                $persistent = $this->options['persistent'];
+                $this->dsn = $this->connected_dsn;
+                $this->database_name = $this->connected_database_name;
+                $this->options['persistent'] = $this->opened_persistent;
+                $this->rollback();
+                $this->dsn = $dsn;
+                $this->database_name = $database_name;
+                $this->options['persistent'] = $persistent;
+            }
+
+            if (!$this->opened_persistent || $force) {
+                $ok = @pg_close($this->connection);
+                if (!$ok) {
+                    return $this->raiseError(MDB2_ERROR_DISCONNECT_FAILED,
+                           null, null, null, __FUNCTION__);
+                }
+            }
+        } else {
+            return false;
+        }
+        return parent::disconnect($force);
+    }
+
+    // }}}
+    // {{{ standaloneQuery()
+
+   /**
+     * execute a query as DBA
+     *
+     * @param string $query the SQL query
+     * @param mixed   $types  array that contains the types of the columns in
+     *                        the result set
+     * @param boolean $is_manip  if the query is a manipulation query
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function &standaloneQuery($query, $types = null, $is_manip = false)
+    {
+        $user = $this->options['DBA_username']? $this->options['DBA_username'] : $this->dsn['username'];
+        $pass = $this->options['DBA_password']? $this->options['DBA_password'] : $this->dsn['password'];
+        $connection = $this->_doConnect($user, $pass, $this->database_name, $this->options['persistent']);
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $offset = $this->offset;
+        $limit = $this->limit;
+        $this->offset = $this->limit = 0;
+        $query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
+
+        $result =& $this->_doQuery($query, $is_manip, $connection, $this->database_name);
+        if (!PEAR::isError($result)) {
+            if ($is_manip) {
+                $result =  $this->_affectedRows($connection, $result);
+            } else {
+                $result =& $this->_wrapResult($result, $types, true, false, $limit, $offset);
+            }
+        }
+
+        @pg_close($connection);
+        return $result;
+    }
+
+    // }}}
+    // {{{ _doQuery()
+
+    /**
+     * Execute a query
+     * @param string $query  query
+     * @param boolean $is_manip  if the query is a manipulation query
+     * @param resource $connection
+     * @param string $database_name
+     * @return result or error object
+     * @access protected
+     */
+    function &_doQuery($query, $is_manip = false, $connection = null, $database_name = null)
+    {
+        $this->last_query = $query;
+        $result = $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'pre'));
+        if ($result) {
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            $query = $result;
+        }
+        if ($this->options['disable_query']) {
+            $result = $is_manip ? 0 : null;
+            return $result;
+        }
+
+        if (null === $connection) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+
+        $function = $this->options['multi_query'] ? 'pg_send_query' : 'pg_query';
+        $result = @$function($connection, $query);
+        if (!$result) {
+            $err =& $this->raiseError(null, null, null,
+                'Could not execute statement', __FUNCTION__);
+            return $err;
+        } elseif ($this->options['multi_query']) {
+            if (!($result = @pg_get_result($connection))) {
+                $err =& $this->raiseError(null, null, null,
+                        'Could not get the first result from a multi query', __FUNCTION__);
+                return $err;
+            }
+        }
+
+        $this->debug($query, 'query', array('is_manip' => $is_manip, 'when' => 'post', 'result' => $result));
+        return $result;
+    }
+
+    // }}}
+    // {{{ _affectedRows()
+
+    /**
+     * Returns the number of rows affected
+     *
+     * @param resource $result
+     * @param resource $connection
+     * @return mixed MDB2 Error Object or the number of rows affected
+     * @access private
+     */
+    function _affectedRows($connection, $result = null)
+    {
+        if (null === $connection) {
+            $connection = $this->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+        }
+        return @pg_affected_rows($result);
+    }
+
+    // }}}
+    // {{{ _modifyQuery()
+
+    /**
+     * Changes a query string for various DBMS specific reasons
+     *
+     * @param string $query  query to modify
+     * @param boolean $is_manip  if it is a DML query
+     * @param integer $limit  limit the number of rows
+     * @param integer $offset  start reading from given offset
+     * @return string modified query
+     * @access protected
+     */
+    function _modifyQuery($query, $is_manip, $limit, $offset)
+    {
+        if ($limit > 0
+            && !preg_match('/LIMIT\s*\d(?:\s*(?:,|OFFSET)\s*\d+)?(?:[^\)]*)?$/i', $query)
+        ) {
+            $query = rtrim($query);
+            if (substr($query, -1) == ';') {
+                $query = substr($query, 0, -1);
+            }
+            if ($is_manip) {
+                $query = $this->_modifyManipQuery($query, $limit);
+            } else {
+                $query.= " LIMIT $limit OFFSET $offset";
+            }
+        }
+        return $query;
+    }
+    
+    // }}}
+    // {{{ _modifyManipQuery()
+    
+    /**
+     * Changes a manip query string for various DBMS specific reasons
+     *
+     * @param string $query  query to modify
+     * @param integer $limit  limit the number of rows
+     * @return string modified query
+     * @access protected
+     */
+    function _modifyManipQuery($query, $limit)
+    {
+        $pos = strpos(strtolower($query), 'where');
+        $where = $pos ? substr($query, $pos) : '';
+
+        $manip_clause = '(\bDELETE\b\s+(?:\*\s+)?\bFROM\b|\bUPDATE\b)';
+        $from_clause  = '([\w\.]+)';
+        $where_clause = '(?:(.*)\bWHERE\b\s+(.*))|(.*)';
+        $pattern = '/^'. $manip_clause . '\s+' . $from_clause .'(?:\s)*(?:'. $where_clause .')?$/i';
+        $matches = preg_match($pattern, $query, $match);
+        if ($matches) {
+            $manip = $match[1];
+            $from  = $match[2];
+            $what  = (count($matches) == 6) ? $match[5] : $match[3];
+            return $manip.' '.$from.' '.$what.' WHERE ctid=(SELECT ctid FROM '.$from.' '.$where.' LIMIT '.$limit.')';
+        }
+        //return error?
+        return $query;
+    }
+
+    // }}}
+    // {{{ getServerVersion()
+
+    /**
+     * return version information about the server
+     *
+     * @param bool   $native  determines if the raw version string should be returned
+     * @return mixed array/string with version information or MDB2 error object
+     * @access public
+     */
+    function getServerVersion($native = false)
+    {
+        $query = 'SHOW SERVER_VERSION';
+        if ($this->connected_server_info) {
+            $server_info = $this->connected_server_info;
+        } else {
+            $server_info = $this->queryOne($query, 'text');
+            if (PEAR::isError($server_info)) {
+                return $server_info;
+            }
+        }
+        // cache server_info
+        $this->connected_server_info = $server_info;
+        if (!$native && !PEAR::isError($server_info)) {
+            $tmp = explode('.', $server_info, 3);
+            if (empty($tmp[2])
+                && isset($tmp[1])
+                && preg_match('/(\d+)(.*)/', $tmp[1], $tmp2)
+            ) {
+                $server_info = array(
+                    'major' => $tmp[0],
+                    'minor' => $tmp2[1],
+                    'patch' => null,
+                    'extra' => $tmp2[2],
+                    'native' => $server_info,
+                );
+            } else {
+                $server_info = array(
+                    'major' => isset($tmp[0]) ? $tmp[0] : null,
+                    'minor' => isset($tmp[1]) ? $tmp[1] : null,
+                    'patch' => isset($tmp[2]) ? $tmp[2] : null,
+                    'extra' => null,
+                    'native' => $server_info,
+                );
+            }
+        }
+        return $server_info;
+    }
+
+    // }}}
+    // {{{ prepare()
+
+    /**
+     * Prepares a query for multiple execution with execute().
+     * With some database backends, this is emulated.
+     * prepare() requires a generic query as string like
+     * 'INSERT INTO numbers VALUES(?,?)' or
+     * 'INSERT INTO numbers VALUES(:foo,:bar)'.
+     * The ? and :name and are placeholders which can be set using
+     * bindParam() and the query can be sent off using the execute() method.
+     * The allowed format for :name can be set with the 'bindname_format' option.
+     *
+     * @param string $query the query to prepare
+     * @param mixed   $types  array that contains the types of the placeholders
+     * @param mixed   $result_types  array that contains the types of the columns in
+     *                        the result set or MDB2_PREPARE_RESULT, if set to
+     *                        MDB2_PREPARE_MANIP the query is handled as a manipulation query
+     * @param mixed   $lobs   key (field) value (parameter) pair for all lob placeholders
+     * @return mixed resource handle for the prepared query on success, a MDB2
+     *        error on failure
+     * @access public
+     * @see bindParam, execute
+     */
+    function &prepare($query, $types = null, $result_types = null, $lobs = array())
+    {
+        if ($this->options['emulate_prepared']) {
+            $obj =& parent::prepare($query, $types, $result_types, $lobs);
+            return $obj;
+        }
+        $is_manip = ($result_types === MDB2_PREPARE_MANIP);
+        $offset = $this->offset;
+        $limit = $this->limit;
+        $this->offset = $this->limit = 0;
+        $result = $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'pre'));
+        if ($result) {
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+            $query = $result;
+        }
+        $pgtypes = function_exists('pg_prepare') ? false : array();
+        if ($pgtypes !== false && !empty($types)) {
+            $this->loadModule('Datatype', null, true);
+        }
+        $query = $this->_modifyQuery($query, $is_manip, $limit, $offset);
+        $placeholder_type_guess = $placeholder_type = null;
+        $question = '?';
+        $colon = ':';
+        $positions = array();
+        $position = $parameter = 0;
+        while ($position < strlen($query)) {
+            $q_position = strpos($query, $question, $position);
+            $c_position = strpos($query, $colon, $position);
+            //skip "::type" cast ("select id::varchar(20) from sometable where name=?")
+            $doublecolon_position = strpos($query, '::', $position);
+            if ($doublecolon_position !== false && $doublecolon_position == $c_position) {
+                $c_position = strpos($query, $colon, $position+2);
+            }
+            if ($q_position && $c_position) {
+                $p_position = min($q_position, $c_position);
+            } elseif ($q_position) {
+                $p_position = $q_position;
+            } elseif ($c_position) {
+                $p_position = $c_position;
+            } else {
+                break;
+            }
+            if (null === $placeholder_type) {
+                $placeholder_type_guess = $query[$p_position];
+            }
+            
+            $new_pos = $this->_skipDelimitedStrings($query, $position, $p_position);
+            if (PEAR::isError($new_pos)) {
+                return $new_pos;
+            }
+            if ($new_pos != $position) {
+                $position = $new_pos;
+                continue; //evaluate again starting from the new position
+            }
+
+            if ($query[$position] == $placeholder_type_guess) {
+                if (null === $placeholder_type) {
+                    $placeholder_type = $query[$p_position];
+                    $question = $colon = $placeholder_type;
+                    if (!empty($types) && is_array($types)) {
+                        if ($placeholder_type == ':') {
+                        } else {
+                            $types = array_values($types);
+                        }
+                    }
+                }
+                if ($placeholder_type_guess == '?') {
+                    $length = 1;
+                    $name = $parameter;
+                } else {
+                    $regexp = '/^.{'.($position+1).'}('.$this->options['bindname_format'].').*$/s';
+                    $param = preg_replace($regexp, '\\1', $query);
+                    if ($param === '') {
+                        $err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+                            'named parameter name must match "bindname_format" option', __FUNCTION__);
+                        return $err;
+                    }
+                    $length = strlen($param) + 1;
+                    $name = $param;
+                }
+                if ($pgtypes !== false) {
+                    if (is_array($types) && array_key_exists($name, $types)) {
+                        $pgtypes[] = $this->datatype->mapPrepareDatatype($types[$name]);
+                    } elseif (is_array($types) && array_key_exists($parameter, $types)) {
+                        $pgtypes[] = $this->datatype->mapPrepareDatatype($types[$parameter]);
+                    } else {
+                        $pgtypes[] = 'text';
+                    }
+                }
+                if (($key_parameter = array_search($name, $positions))) {
+                    $next_parameter = 1;
+                    foreach ($positions as $key => $value) {
+                        if ($key_parameter == $key) {
+                            break;
+                        }
+                        ++$next_parameter;
+                    }
+                } else {
+                    ++$parameter;
+                    $next_parameter = $parameter;
+                    $positions[] = $name;
+                }
+                $query = substr_replace($query, '$'.$parameter, $position, $length);
+                $position = $p_position + strlen($parameter);
+            } else {
+                $position = $p_position;
+            }
+        }
+        $connection = $this->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+        static $prep_statement_counter = 1;
+        $statement_name = sprintf($this->options['statement_format'], $this->phptype, $prep_statement_counter++ . sha1(microtime() + mt_rand()));
+        $statement_name = substr(strtolower($statement_name), 0, $this->options['max_identifiers_length']);
+        if (false === $pgtypes) {
+            $result = @pg_prepare($connection, $statement_name, $query);
+            if (!$result) {
+                $err =& $this->raiseError(null, null, null,
+                    'Unable to create prepared statement handle', __FUNCTION__);
+                return $err;
+            }
+        } else {
+            $types_string = '';
+            if ($pgtypes) {
+                $types_string = ' ('.implode(', ', $pgtypes).') ';
+            }
+            $query = 'PREPARE '.$statement_name.$types_string.' AS '.$query;
+            $statement =& $this->_doQuery($query, true, $connection);
+            if (PEAR::isError($statement)) {
+                return $statement;
+            }
+        }
+
+        $class_name = 'MDB2_Statement_'.$this->phptype;
+        $obj = new $class_name($this, $statement_name, $positions, $query, $types, $result_types, $is_manip, $limit, $offset);
+        $this->debug($query, __FUNCTION__, array('is_manip' => $is_manip, 'when' => 'post', 'result' => $obj));
+        return $obj;
+    }
+
+    // }}}
+    // {{{ function getSequenceName($sqn)
+
+    /**
+     * adds sequence name formatting to a sequence name
+     *
+     * @param   string  name of the sequence
+     *
+     * @return  string  formatted sequence name
+     *
+     * @access  public
+     */
+    function getSequenceName($sqn)
+    {
+        if (false === $this->options['disable_smart_seqname']) {
+            if (strpos($sqn, '_') !== false) {
+                list($table, $field) = explode('_', $sqn, 2);
+            }
+            $schema_list = $this->queryOne("SELECT array_to_string(current_schemas(false), ',')");
+            if (PEAR::isError($schema_list) || empty($schema_list) || count($schema_list) < 2) {
+                $order_by = ' a.attnum';
+                $schema_clause = ' AND n.nspname=current_schema()';
+            } else {
+                $schemas = explode(',', $schema_list);
+                $schema_clause = ' AND n.nspname IN ('.$schema_list.')';
+                $counter = 1;
+                $order_by = ' CASE ';
+                foreach ($schemas as $schema) {
+                    $order_by .= ' WHEN n.nspname='.$schema.' THEN '.$counter++;
+                }
+                $order_by .= ' ELSE '.$counter.' END, a.attnum';
+            }
+
+            $query = "SELECT substring((SELECT substring(pg_get_expr(d.adbin, d.adrelid) for 128)
+                    	    FROM pg_attrdef d
+                    	   WHERE d.adrelid = a.attrelid
+                    	     AND d.adnum = a.attnum
+                    	     AND a.atthasdef
+                    	 ) FROM 'nextval[^'']*''([^'']*)')
+                        FROM pg_attribute a
+                    LEFT JOIN pg_class c ON c.oid = a.attrelid
+                    LEFT JOIN pg_attrdef d ON d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef
+                    LEFT JOIN pg_namespace n ON c.relnamespace = n.oid
+                       WHERE (c.relname = ".$this->quote($sqn, 'text');
+            if (!empty($field)) {
+                $query .= " OR (c.relname = ".$this->quote($table, 'text')." AND a.attname = ".$this->quote($field, 'text').")";
+            }
+            $query .= "      )"
+                         .$schema_clause."
+                         AND NOT a.attisdropped
+                         AND a.attnum > 0
+                         AND pg_get_expr(d.adbin, d.adrelid) LIKE 'nextval%'
+                    ORDER BY ".$order_by;
+            $seqname = $this->queryOne($query);
+            if (!PEAR::isError($seqname) && !empty($seqname) && is_string($seqname)) {
+                return $seqname;
+            }
+        }
+
+        return parent::getSequenceName($sqn);
+    }
+
+    // }}}
+    // {{{ nextID()
+
+    /**
+     * Returns the next free id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @param boolean $ondemand when true the sequence is
+     *                          automatic created, if it
+     *                          not exists
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function nextID($seq_name, $ondemand = true)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        $query = "SELECT NEXTVAL('$sequence_name')";
+        $this->pushErrorHandling(PEAR_ERROR_RETURN);
+        $this->expectError(MDB2_ERROR_NOSUCHTABLE);
+        $result = $this->queryOne($query, 'integer');
+        $this->popExpect();
+        $this->popErrorHandling();
+        if (PEAR::isError($result)) {
+            if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
+                $this->loadModule('Manager', null, true);
+                $result = $this->manager->createSequence($seq_name);
+                if (PEAR::isError($result)) {
+                    return $this->raiseError($result, null, null,
+                        'on demand sequence could not be created', __FUNCTION__);
+                }
+                return $this->nextId($seq_name, false);
+            }
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ lastInsertID()
+
+    /**
+     * Returns the autoincrement ID if supported or $id or fetches the current
+     * ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
+     *
+     * @param string $table name of the table into which a new row was inserted
+     * @param string $field name of the field into which a new row was inserted
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function lastInsertID($table = null, $field = null)
+    {
+        if (empty($table) && empty($field)) {
+            return $this->queryOne('SELECT lastval()', 'integer');
+        }
+        $seq = $table.(empty($field) ? '' : '_'.$field);
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq), true);
+        return $this->queryOne("SELECT currval('$sequence_name')", 'integer');
+    }
+
+    // }}}
+    // {{{ currID()
+
+    /**
+     * Returns the current id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function currID($seq_name)
+    {
+        $sequence_name = $this->quoteIdentifier($this->getSequenceName($seq_name), true);
+        return $this->queryOne("SELECT last_value FROM $sequence_name", 'integer');
+    }
+}
+
+/**
+ * MDB2 PostGreSQL result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Result_pgsql extends MDB2_Result_Common
+{
+    // }}}
+    // {{{ fetchRow()
+
+    /**
+     * Fetch a row and insert the data into an existing array.
+     *
+     * @param int       $fetchmode  how the array data should be indexed
+     * @param int    $rownum    number of the row where the data can be found
+     * @return int data array on success, a MDB2 error on failure
+     * @access public
+     */
+    function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
+    {
+        if (null !== $rownum) {
+            $seek = $this->seek($rownum);
+            if (PEAR::isError($seek)) {
+                return $seek;
+            }
+        }
+        if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
+            $fetchmode = $this->db->fetchmode;
+        }
+        if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
+            $row = @pg_fetch_array($this->result, null, PGSQL_ASSOC);
+            if (is_array($row)
+                && $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
+            ) {
+                $row = array_change_key_case($row, $this->db->options['field_case']);
+            }
+        } else {
+            $row = @pg_fetch_row($this->result);
+        }
+        if (!$row) {
+            if (false === $this->result) {
+                $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+                return $err;
+            }
+            $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 {
+                $rowObj = new $object_class($row);
+                $row = $rowObj;
+            }
+        }
+        ++$this->rownum;
+        return $row;
+    }
+
+    // }}}
+    // {{{ _getColumnNames()
+
+    /**
+     * Retrieve the names of columns returned by the DBMS in a query result.
+     *
+     * @return  mixed   Array variable that holds the names of columns as keys
+     *                  or an MDB2 error on failure.
+     *                  Some DBMS may not return any columns when the result set
+     *                  does not contain any rows.
+     * @access private
+     */
+    function _getColumnNames()
+    {
+        $columns = array();
+        $numcols = $this->numCols();
+        if (PEAR::isError($numcols)) {
+            return $numcols;
+        }
+        for ($column = 0; $column < $numcols; $column++) {
+            $column_name = @pg_field_name($this->result, $column);
+            $columns[$column_name] = $column;
+        }
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $columns = array_change_key_case($columns, $this->db->options['field_case']);
+        }
+        return $columns;
+    }
+
+    // }}}
+    // {{{ numCols()
+
+    /**
+     * Count the number of columns returned by the DBMS in a query result.
+     *
+     * @access public
+     * @return mixed integer value with the number of columns, a MDB2 error
+     *                       on failure
+     */
+    function numCols()
+    {
+        $cols = @pg_num_fields($this->result);
+        if (null === $cols) {
+            if (false === $this->result) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            }
+            if (null === $this->result) {
+                return count($this->types);
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get column count', __FUNCTION__);
+        }
+        return $cols;
+    }
+
+    // }}}
+    // {{{ nextResult()
+
+    /**
+     * Move the internal result pointer to the next available result
+     *
+     * @return true on success, false if there is no more result set or an error object on failure
+     * @access public
+     */
+    function nextResult()
+    {
+        $connection = $this->db->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        if (!($this->result = @pg_get_result($connection))) {
+            return false;
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Free the internal resources associated with result.
+     *
+     * @return boolean true on success, false if result is invalid
+     * @access public
+     */
+    function free()
+    {
+        if (is_resource($this->result) && $this->db->connection) {
+            $free = @pg_free_result($this->result);
+            if (false === $free) {
+                return $this->db->raiseError(null, null, null,
+                    'Could not free result', __FUNCTION__);
+            }
+        }
+        $this->result = false;
+        return MDB2_OK;
+    }
+}
+
+/**
+ * MDB2 PostGreSQL buffered result driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_BufferedResult_pgsql extends MDB2_Result_pgsql
+{
+    // {{{ seek()
+
+    /**
+     * Seek to a specific row in a result set
+     *
+     * @param int    $rownum    number of the row where the data can be found
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function seek($rownum = 0)
+    {
+        if ($this->rownum != ($rownum - 1) && !@pg_result_seek($this->result, $rownum)) {
+            if (false === $this->result) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            }
+            if (null === $this->result) {
+                return MDB2_OK;
+            }
+            return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
+                'tried to seek to an invalid row number ('.$rownum.')', __FUNCTION__);
+        }
+        $this->rownum = $rownum - 1;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ valid()
+
+    /**
+     * Check if the end of the result set has been reached
+     *
+     * @return mixed true or false on sucess, a MDB2 error on failure
+     * @access public
+     */
+    function valid()
+    {
+        $numrows = $this->numRows();
+        if (PEAR::isError($numrows)) {
+            return $numrows;
+        }
+        return $this->rownum < ($numrows - 1);
+    }
+
+    // }}}
+    // {{{ numRows()
+
+    /**
+     * Returns the number of rows in a result object
+     *
+     * @return mixed MDB2 Error Object or the number of rows
+     * @access public
+     */
+    function numRows()
+    {
+        $rows = @pg_num_rows($this->result);
+        if (null === $rows) {
+            if (false === $this->result) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'resultset has already been freed', __FUNCTION__);
+            }
+            if (null === $this->result) {
+                return 0;
+            }
+            return $this->db->raiseError(null, null, null,
+                'Could not get row count', __FUNCTION__);
+        }
+        return $rows;
+    }
+}
+
+/**
+ * MDB2 PostGreSQL statement driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Statement_pgsql extends MDB2_Statement_Common
+{
+    // {{{ _execute()
+
+    /**
+     * Execute a prepared query statement helper method.
+     *
+     * @param mixed $result_class string which specifies which result class to use
+     * @param mixed $result_wrap_class string which specifies which class to wrap results in
+     *
+     * @return mixed MDB2_Result or integer (affected rows) on success,
+     *               a MDB2 error on failure
+     * @access private
+     */
+    function &_execute($result_class = true, $result_wrap_class = false)
+    {
+        if (null === $this->statement) {
+            $result =& parent::_execute($result_class, $result_wrap_class);
+            return $result;
+        }
+        $this->db->last_query = $this->query;
+        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'pre', 'parameters' => $this->values));
+        if ($this->db->getOption('disable_query')) {
+            $result = $this->is_manip ? 0 : null;
+            return $result;
+        }
+
+        $connection = $this->db->getConnection();
+        if (PEAR::isError($connection)) {
+            return $connection;
+        }
+
+        $query = false;
+        $parameters = array();
+        // todo: disabled until pg_execute() bytea issues are cleared up
+        if (true || !function_exists('pg_execute')) {
+            $query = 'EXECUTE '.$this->statement;
+        }
+        if (!empty($this->positions)) {
+            foreach ($this->positions as $parameter) {
+                if (!array_key_exists($parameter, $this->values)) {
+                    return $this->db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                        'Unable to bind to missing placeholder: '.$parameter, __FUNCTION__);
+                }
+                $value = $this->values[$parameter];
+                $type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
+                if (is_resource($value) || $type == 'clob' || $type == 'blob' || $this->db->options['lob_allow_url_include']) {
+                    if (!is_resource($value) && preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {
+                        if ($match[1] == 'file://') {
+                            $value = $match[2];
+                        }
+                        $value = @fopen($value, 'r');
+                        $close = true;
+                    }
+                    if (is_resource($value)) {
+                        $data = '';
+                        while (!@feof($value)) {
+                            $data.= @fread($value, $this->db->options['lob_buffer_length']);
+                        }
+                        if ($close) {
+                            @fclose($value);
+                        }
+                        $value = $data;
+                    }
+                }
+                $quoted = $this->db->quote($value, $type, $query);
+                if (PEAR::isError($quoted)) {
+                    return $quoted;
+                }
+                $parameters[] = $quoted;
+            }
+            if ($query) {
+                $query.= ' ('.implode(', ', $parameters).')';
+            }
+        }
+
+        if (!$query) {
+            $result = @pg_execute($connection, $this->statement, $parameters);
+            if (!$result) {
+                $err =& $this->db->raiseError(null, null, null,
+                    'Unable to execute statement', __FUNCTION__);
+                return $err;
+            }
+        } else {
+            $result = $this->db->_doQuery($query, $this->is_manip, $connection);
+            if (PEAR::isError($result)) {
+                return $result;
+            }
+        }
+
+        if ($this->is_manip) {
+            $affected_rows = $this->db->_affectedRows($connection, $result);
+            return $affected_rows;
+        }
+
+        $result =& $this->db->_wrapResult($result, $this->result_types,
+            $result_class, $result_wrap_class, $this->limit, $this->offset);
+        $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));
+        return $result;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Release resources allocated for the specified prepared query.
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function free()
+    {
+        if (null === $this->positions) {
+            return $this->db->raiseError(MDB2_ERROR, null, null,
+                'Prepared statement has already been freed', __FUNCTION__);
+        }
+        $result = MDB2_OK;
+
+        if (null !== $this->statement) {
+            $connection = $this->db->getConnection();
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+            $query = 'DEALLOCATE PREPARE '.$this->statement;
+            $result = $this->db->_doQuery($query, true, $connection);
+        }
+
+        parent::free();
+        return $result;
+    }
+}
 ?>
\ No newline at end of file