added all mdb2 drivers

1 files changed, 1115 insertions, 0 deletions

diff --git a/program/lib/MDB2/Driver/ibase.php b/program/lib/MDB2/Driver/ibase.php
new file mode 100755
index 000000000..260058398
--- /dev/null
+++ b/program/lib/MDB2/Driver/ibase.php
@@ -0,0 +1,1115 @@
+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5                                                 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2004 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: Lorenzo Alberton <l.alberton@quipo.it>                       |
+// +----------------------------------------------------------------------+
+//
+// $Id$
+
+/**
+ * MDB2 FireBird/InterBase driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lorenzo Alberton <l.alberton@quipo.it>
+ */
+class MDB2_Driver_ibase extends MDB2_Driver_Common
+{
+    // {{{ properties
+    var $escape_quotes = "'";
+
+    var $transaction_id = 0;
+
+    var $query_parameters = array();
+    var $query_parameter_values = array();
+
+    // }}}
+    // {{{ constructor
+
+    /**
+     * Constructor
+     */
+    function __construct()
+    {
+        parent::__construct();
+
+        $this->phptype  = 'ibase';
+        $this->dbsyntax = 'ibase';
+
+        $this->supported['sequences'] = true;
+        $this->supported['indexes'] = true;
+        $this->supported['affected_rows'] = function_exists('ibase_affected_rows');
+        $this->supported['summary_functions'] = true;
+        $this->supported['order_by_text'] = true;
+        $this->supported['transactions'] = true;
+        $this->supported['current_id'] = true;
+        // maybe this needs different handling for ibase and firebird?
+        $this->supported['limit_queries'] = 'emulated';
+        $this->supported['LOBs'] = true;
+        $this->supported['replace'] = false;
+        $this->supported['sub_selects'] = true;
+        $this->supported['auto_increment'] = true;
+        $this->supported['primary_key'] = true;
+
+        $this->options['database_path'] = '';
+        $this->options['database_extension'] = '.gdb';
+        $this->options['default_text_field_length'] = 4096;
+    }
+
+    // }}}
+    // {{{ errorInfo()
+
+    /**
+     * This method is used to collect information about an error
+     *
+     * @param integer $error
+     * @return array
+     * @access public
+     */
+    function errorInfo($error = null)
+    {
+        $native_msg = @ibase_errmsg();
+
+        if (function_exists('ibase_errcode')) {
+            $native_code = @ibase_errcode();
+        } else {
+            // memo for the interbase php module hackers: we need something similar
+            // to mysql_errno() to retrieve error codes instead of this ugly hack
+            if (preg_match('/^([^0-9\-]+)([0-9\-]+)\s+(.*)$/', $native_msg, $m)) {
+                $native_code = (int)$m[2];
+            } else {
+                $native_code = null;
+            }
+        }
+        if (is_null($error)) {
+            $error = MDB2_ERROR;
+            if ($native_code) {
+                // try to interpret Interbase error code (that's why we need ibase_errno()
+                // in the interbase module to return the real error code)
+                switch ($native_code) {
+                case -204:
+                    if (isset($m[3]) && is_int(strpos($m[3], 'Table unknown'))) {
+                        $errno = MDB2_ERROR_NOSUCHTABLE;
+                    }
+                break;
+                default:
+                    static $ecode_map;
+                    if (empty($ecode_map)) {
+                        $ecode_map = array(
+                            -104 => MDB2_ERROR_SYNTAX,
+                            -150 => MDB2_ERROR_ACCESS_VIOLATION,
+                            -151 => MDB2_ERROR_ACCESS_VIOLATION,
+                            -155 => MDB2_ERROR_NOSUCHTABLE,
+                            -157 => MDB2_ERROR_NOSUCHFIELD,
+                            -158 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+                            -170 => MDB2_ERROR_MISMATCH,
+                            -171 => MDB2_ERROR_MISMATCH,
+                            -172 => MDB2_ERROR_INVALID,
+                            // -204 =>  // Covers too many errors, need to use regex on msg
+                            -205 => MDB2_ERROR_NOSUCHFIELD,
+                            -206 => MDB2_ERROR_NOSUCHFIELD,
+                            -208 => MDB2_ERROR_INVALID,
+                            -219 => MDB2_ERROR_NOSUCHTABLE,
+                            -297 => MDB2_ERROR_CONSTRAINT,
+                            -303 => MDB2_ERROR_INVALID,
+                            -413 => MDB2_ERROR_INVALID_NUMBER,
+                            -530 => MDB2_ERROR_CONSTRAINT,
+                            -551 => MDB2_ERROR_ACCESS_VIOLATION,
+                            -552 => MDB2_ERROR_ACCESS_VIOLATION,
+                            // -607 =>  // Covers too many errors, need to use regex on msg
+                            -625 => MDB2_ERROR_CONSTRAINT_NOT_NULL,
+                            -803 => MDB2_ERROR_CONSTRAINT,
+                            -804 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+                            -904 => MDB2_ERROR_CONNECT_FAILED,
+                            -922 => MDB2_ERROR_NOSUCHDB,
+                            -923 => MDB2_ERROR_CONNECT_FAILED,
+                            -924 => MDB2_ERROR_CONNECT_FAILED
+                        );
+                    }
+                    if (isset($ecode_map[$native_code])) {
+                        $error = $ecode_map[$native_code];
+                    }
+                    break;
+                }
+            } else {
+                static $error_regexps;
+                if (!isset($error_regexps)) {
+                    $error_regexps = array(
+                        '/generator .* is not defined/'
+                            => MDB2_ERROR_SYNTAX,  // for compat. w ibase_errcode()
+                        '/table.*(not exist|not found|unknown)/i'
+                            => MDB2_ERROR_NOSUCHTABLE,
+                        '/table .* already exists/i'
+                            => MDB2_ERROR_ALREADY_EXISTS,
+                        '/unsuccessful metadata update .* failed attempt to store duplicate value/i'
+                            => MDB2_ERROR_ALREADY_EXISTS,
+                        '/unsuccessful metadata update .* not found/i'
+                            => MDB2_ERROR_NOT_FOUND,
+                        '/validation error for column .* value "\*\*\* null/i'
+                            => MDB2_ERROR_CONSTRAINT_NOT_NULL,
+                        '/violation of [\w ]+ constraint/i'
+                            => MDB2_ERROR_CONSTRAINT,
+                        '/conversion error from string/i'
+                            => MDB2_ERROR_INVALID_NUMBER,
+                        '/no permission for/i'
+                            => MDB2_ERROR_ACCESS_VIOLATION,
+                        '/arithmetic exception, numeric overflow, or string truncation/i'
+                            => MDB2_ERROR_INVALID,
+                    );
+                }
+                foreach ($error_regexps as $regexp => $code) {
+                    if (preg_match($regexp, $native_msg, $m)) {
+                        $error = $code;
+                        break;
+                    }
+                }
+            }
+        }
+        return array($error, $native_code, $native_msg);
+    }
+
+    // }}}
+    // {{{ beginTransaction()
+
+    /**
+     * Start a transaction.
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function beginTransaction()
+    {
+        $this->debug('starting transaction', 'beginTransaction');
+        if ($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');
+        }
+        $result = ibase_trans();
+        if (!$result) {
+            return $this->raiseError(MDB2_ERROR, null, null,
+                'beginTransaction: could not start a transaction');
+        }
+        $this->transaction_id = $result;
+        $this->in_transaction = true;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ commit()
+
+    /**
+     * Commit the database changes done during a transaction that is in
+     * progress.
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function commit()
+    {
+        $this->debug('commit transaction', 'commit');
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR, null, null,
+                'commit: transaction changes are being auto committed');
+        }
+        if (!ibase_commit($this->transaction_id)) {
+            return $this->raiseError(MDB2_ERROR, null, null,
+                'commit: could not commit a transaction');
+        }
+        $this->in_transaction = false;
+        //$this->transaction_id = 0;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ rollback()
+
+    /**
+     * Cancel any database changes done during a transaction that is in
+     * progress.
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function rollback()
+    {
+        $this->debug('rolling back transaction', 'rollback');
+        if (!$this->in_transaction) {
+            return $this->raiseError(MDB2_ERROR, null, null,
+                'rollback: transactions can not be rolled back when changes are auto committed');
+        }
+        if ($this->transaction_id && !ibase_rollback($this->transaction_id)) {
+            return $this->raiseError(MDB2_ERROR, null, null,
+                'rollback: Could not rollback a pending transaction: '.ibase_errmsg());
+        }
+        $this->in_transaction = false;
+        $this->transaction_id = 0;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ getDatabaseFile()
+
+    /**
+     * Builds the string with path+dbname+extension
+     *
+     * @return string full database path+file
+     * @access protected
+     */
+    function _getDatabaseFile($database_name)
+    {
+        if ($database_name == '') {
+            return $database_name;
+        }
+        return $this->options['database_path'].$database_name.$this->options['database_extension'];
+    }
+
+    // }}}
+    // {{{ _doConnect()
+
+    /**
+     * Does the grunt work of connecting to the database
+     *
+     * @return mixed connection resource on success, MDB2 Error Object on failure
+     * @access protected
+     */
+    function _doConnect($database_name, $persistent = false)
+    {
+        $user    = $this->dsn['username'];
+        $pw      = $this->dsn['password'];
+        $dbhost  = $this->dsn['hostspec'] ?
+            ($this->dsn['hostspec'].':'.$database_name) : $database_name;
+
+        $params = array();
+        $params[] = $dbhost;
+        $params[] = !empty($user) ? $user : null;
+        $params[] = !empty($pw) ? $pw : null;
+        $params[] = isset($this->dsn['charset']) ? $this->dsn['charset'] : null;
+        $params[] = isset($this->dsn['buffers']) ? $this->dsn['buffers'] : null;
+        $params[] = isset($this->dsn['dialect']) ? $this->dsn['dialect'] : null;
+        $params[] = isset($this->dsn['role'])    ? $this->dsn['role'] : null;
+
+        $connect_function = $persistent ? 'ibase_pconnect' : 'ibase_connect';
+
+        $connection = @call_user_func_array($connect_function, $params);
+        if ($connection <= 0) {
+            return $this->raiseError(MDB2_ERROR_CONNECT_FAILED);
+        }
+        if (function_exists('ibase_timefmt')) {
+            @ibase_timefmt("%Y-%m-%d %H:%M:%S", IBASE_TIMESTAMP);
+            @ibase_timefmt("%Y-%m-%d", IBASE_DATE);
+        } else {
+            @ini_set("ibase.timestampformat", "%Y-%m-%d %H:%M:%S");
+            //@ini_set("ibase.timeformat", "%H:%M:%S");
+            @ini_set("ibase.dateformat", "%Y-%m-%d");
+        }
+
+        return $connection;
+    }
+
+    // }}}
+    // {{{ connect()
+
+    /**
+     * Connect to the database
+     *
+     * @return true on success, MDB2 Error Object on failure
+     * @access public
+     */
+    function connect()
+    {
+        $database_file = $this->_getDatabaseFile($this->database_name);
+        if (is_resource($this->connection)) {
+            if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
+                && $this->connected_database_name == $database_file
+                && $this->opened_persistent == $this->options['persistent']
+            ) {
+                return MDB2_OK;
+            }
+            $this->disconnect(false);
+        }
+
+        if (!PEAR::loadExtension('interbase')) {
+            return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+                'connect: extension '.$this->phptype.' is not compiled into PHP');
+        }
+
+        if (!empty($this->database_name)) {
+            $connection = $this->_doConnect($database_file, $this->options['persistent']);
+            if (PEAR::isError($connection)) {
+                return $connection;
+            }
+            $this->connection =& $connection;
+            $this->connected_dsn = $this->dsn;
+            $this->connected_database_name = $database_file;
+            $this->opened_persistent = $this->options['persistent'];
+            $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ disconnect()
+
+    /**
+     * Log out and disconnect from the database.
+     *
+     * @return mixed true on success, false if not connected and error
+     *                object on error
+     * @access public
+     */
+    function disconnect($force = true)
+    {
+        if (is_resource($this->connection)) {
+            if (!$this->opened_persistent || $force) {
+                @ibase_close($this->connection);
+            }
+            $this->connection = 0;
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ _doQuery()
+
+    /**
+     * Execute a query
+     * @param string $query  query
+     * @param boolean $isManip  if the query is a manipulation query
+     * @param resource $connection
+     * @param string $database_name
+     * @return result or error object
+     * @access protected
+     */
+    function _doQuery($query, $isManip = false, $connection = null, $database_name = null)
+    {
+        $this->last_query = $query;
+        $this->debug($query, 'query');
+        if ($this->getOption('disable_query')) {
+            if ($isManip) {
+                return 0;
+            }
+            return null;
+        }
+
+        if (is_null($connection)) {
+            if ($this->in_transaction) {
+                $connection = $this->transaction_id;
+            } else {
+                $err = $this->connect();
+                if (PEAR::isError($err)) {
+                    return $err;
+                }
+                $connection = $this->connection;
+            }
+        }
+        $result = ibase_query($connection, $query);
+
+        if ($result === false) {
+            return $this->raiseError();
+        }
+
+        if ($isManip) {
+            //return $result;
+            return (function_exists('ibase_affected_rows') ? ibase_affected_rows($connection) : 0);
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ _modifyQuery()
+
+    /**
+     * Changes a query string for various DBMS specific reasons
+     *
+     * @param string $query  query to modify
+     * @return the new (modified) query
+     * @access protected
+     */
+    function _modifyQuery($query, $isManip, $limit, $offset)
+    {
+        if ($limit > 0 && $this->dsn['dbsyntax'] == 'firebird') {
+            $query = preg_replace('/^([\s(])*SELECT(?!\s*FIRST\s*\d+)/i',
+                "SELECT FIRST $limit SKIP $offset", $query);
+        }
+        return $query;
+    }
+
+    // }}}
+    // {{{ 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 :[a-zA-Z] and  are placeholders which can be set using
+     * bindParam() and the query can be send off using the execute() method.
+     *
+     * @param string $query the query to prepare
+     * @param mixed   $types  array that contains the types of the placeholders
+     * @param mixed   $result_types  array that contains the types of the columns in
+     *                        the result set
+     * @return mixed resource handle for the prepared query on success, a MDB2
+     *        error on failure
+     * @access public
+     * @see bindParam, execute
+     */
+    function &prepare($query, $types = null, $result_types = null)
+    {
+        $this->debug($query, 'prepare');
+        $placeholder_type_guess = $placeholder_type = null;
+        $question = '?';
+        $colon = ':';
+        $position = 0;
+        while ($position < strlen($query)) {
+            $q_position = strpos($query, $question, $position);
+            $c_position = strpos($query, $colon, $position);
+            if ($q_position && $c_position) {
+                $p_position = min($q_position, $c_position);
+            } elseif ($q_position) {
+                $p_position = $q_position;
+            } elseif ($c_position) {
+                $p_position = $c_position;
+            } else {
+                break;
+            }
+            if (is_null($placeholder_type)) {
+                $placeholder_type_guess = $query[$p_position];
+            }
+            if (is_int($quote = strpos($query, "'", $position)) && $quote < $p_position) {
+                if (!is_int($end_quote = strpos($query, "'", $quote + 1))) {
+                    $err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+                        'prepare: query with an unterminated text string specified');
+                    return $err;
+                }
+                switch ($this->escape_quotes) {
+                case '':
+                case "'":
+                    $position = $end_quote + 1;
+                    break;
+                default:
+                    if ($end_quote == $quote + 1) {
+                        $position = $end_quote + 1;
+                    } else {
+                        if ($query[$end_quote-1] == $this->escape_quotes) {
+                            $position = $end_quote;
+                        } else {
+                            $position = $end_quote + 1;
+                        }
+                    }
+                    break;
+                }
+            } elseif ($query[$position] == $placeholder_type_guess) {
+                if ($placeholder_type_guess == '?') {
+                    break;
+                }
+                if (is_null($placeholder_type)) {
+                    $placeholder_type = $query[$p_position];
+                    $question = $colon = $placeholder_type;
+                }
+                $name = preg_replace('/^.{'.($position+1).'}([a-z0-9_]+).*$/si', '\\1', $query);
+                if ($name === '') {
+                    $err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+                        'prepare: named parameter with an empty name');
+                    return $err;
+                }
+                $query = substr_replace($query, '?', $position, strlen($name)+1);
+                $position = $p_position + 1;
+            } else {
+                $position = $p_position;
+            }
+        }
+        $connection = ($this->in_transaction ? $this->transaction_id : $this->connection);
+        $statement = ibase_prepare($connection, $query);
+
+        $class_name = 'MDB2_Statement_'.$this->phptype;
+        $obj =& new $class_name($this, $statement, $query, $types, $result_types, $this->row_limit, $this->row_offset);
+        return $obj;
+    }
+
+    // }}}
+    // {{{ nextID()
+
+    /**
+     * returns the next free id of a sequence
+     *
+     * @param string $seq_name name of the sequence
+     * @param boolean $ondemand when true the seqence is
+     *                          automatic created, if it
+     *                          not exists
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function nextID($seq_name, $ondemand = true)
+    {
+        $sequence_name = $this->getSequenceName($seq_name);
+        $query = 'SELECT GEN_ID('.strtoupper($sequence_name).', 1) as the_value FROM RDB$DATABASE';
+        $this->expectError('*');
+        $result = $this->queryOne($query, 'integer');
+        $this->popExpect();
+        if (PEAR::isError($result)) {
+            if ($ondemand) {
+                $this->loadModule('Manager');
+                // Since we are creating the sequence on demand
+                // we know the first id = 1 so initialize the
+                // sequence at 2
+                $result = $this->manager->createSequence($seq_name, 2);
+                if (PEAR::isError($result)) {
+                    return $this->raiseError(MDB2_ERROR, null, null,
+                        'nextID: on demand sequence could not be created');
+                } else {
+                    // First ID of a newly created sequence is 1
+                    // return 1;
+                    // BUT generators are not always reset, so return the actual value
+                    return $this->currID($seq_name);
+                }
+            }
+        }
+        return $result;
+    }
+
+    // }}}
+    // {{{ 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 = $this->getSequenceName($seq_name);
+        $query = 'SELECT GEN_ID('.strtoupper($sequence_name).', 0) as the_value FROM RDB$DATABASE';
+        $value = @$this->queryOne($query);
+        if (PEAR::isError($value)) {
+            return $this->raiseError(MDB2_ERROR, null, null,
+                'currID: Unable to select from ' . $seq_name) ;
+        }
+        if (!is_numeric($value)) {
+            return $this->raiseError(MDB2_ERROR, null, null,
+                'currID: could not find value in sequence table');
+        }
+        return $value;
+    }
+
+    // }}}
+}
+
+class MDB2_Result_ibase extends MDB2_Result_Common
+{
+    // {{{ _skipLimitOffset()
+
+    /**
+     * Skip the first row of a result set.
+     *
+     * @param resource $result
+     * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+     * @access protected
+     */
+    function _skipLimitOffset()
+    {
+        if ($this->db->dsn['dbsyntax'] == 'firebird') {
+            return true;
+        }
+        if ($this->limit) {
+            if ($this->rownum > $this->limit) {
+                return false;
+            }
+        }
+        if ($this->offset) {
+            while ($this->offset_count < $this->offset) {
+                ++$this->offset_count;
+                if (!is_array(@ibase_fetch_row($this->result))) {
+                    $this->offset_count = $this->offset;
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+    // }}}
+    // {{{ 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, $rownum = null)
+    {
+        if ($this->result === true) {
+            //query successfully executed, but without results...
+            $null = null;
+            return $null;
+        }
+        if (!$this->_skipLimitOffset()) {
+            $null = null;
+            return $null;
+        }
+        if (!is_null($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) {
+            $row = @ibase_fetch_assoc($this->result);
+            if (is_array($row)
+                && $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
+            ) {
+                $row = array_change_key_case($row, $this->db->options['field_case']);
+            }
+        } else {
+            $row = @ibase_fetch_row($this->result);
+        }
+        if (!$row) {
+            if (is_null($this->result)) {
+                $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'fetchRow: resultset has already been freed');
+                return $err;
+            }
+            $null = null;
+            return $null;
+        }
+        if (($mode = ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM)
+            + ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL))
+        ) {
+            $this->db->_fixResultArrayValues($row, $mode);
+        }
+        if (!empty($this->values)) {
+            $this->_assignBindColumns($row);
+        }
+        if (!empty($this->types)) {
+            $row = $this->db->datatype->convertResultRow($this->types, $row);
+        }
+        if ($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 associative array variable
+     *      that holds the names of columns. The indexes of the array are
+     *      the column names mapped to lower case and the values are the
+     *      respective numbers of the columns starting from 0. 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++) {
+            $column_info = @ibase_field_info($this->result, $column);
+            $columns[$column_info['alias']] = $column;
+        }
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+            $columns = array_change_key_case($columns, $this->db->options['field_case']);
+        }
+        return $columns;
+    }
+
+    // }}}
+    // {{{ numCols()
+
+    /**
+     * Count the number of columns returned by the DBMS in a query result.
+     *
+     * @return mixed integer value with the number of columns, a MDB2 error
+     *      on failure
+     * @access public
+     */
+    function numCols()
+    {
+        if ($this->result === true) {
+            //query successfully executed, but without results...
+            return 0;
+        }
+
+        if (!is_resource($this->result)) {
+            return $this->db->raiseError('numCols(): not a valid ibase resource');
+        }
+        $cols = @ibase_num_fields($this->result);
+        if (is_null($cols)) {
+            if (is_null($this->result)) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'numCols: resultset has already been freed');
+            }
+            return $this->db->raiseError();
+        }
+        return $cols;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Free the internal resources associated with $result.
+     *
+     * @return boolean true on success, false if $result is invalid
+     * @access public
+     */
+    function free()
+    {
+        if (is_resource($this->result)) {
+            $free = @ibase_free_result($this->result);
+            if (!$free) {
+                if (is_null($this->result)) {
+                    return MDB2_OK;
+                }
+                return $this->db->raiseError();
+            }
+        }
+        $this->result = null;
+        return MDB2_OK;
+    }
+
+    // }}}
+}
+
+class MDB2_BufferedResult_ibase extends MDB2_Result_ibase
+{
+    // {{{ class vars
+
+    var $buffer;
+    var $buffer_rownum = - 1;
+
+    // }}}
+    // {{{ _fillBuffer()
+
+    /**
+     * Fill the row buffer
+     *
+     * @param int $rownum   row number upto which the buffer should be filled
+     *                      if the row number is null all rows are ready into the buffer
+     * @return boolean true on success, false on failure
+     * @access protected
+     */
+    function _fillBuffer($rownum = null)
+    {
+        if (isset($this->buffer) && is_array($this->buffer)) {
+            if (is_null($rownum)) {
+                if (!end($this->buffer)) {
+                    return false;
+                }
+            } elseif (isset($this->buffer[$rownum])) {
+                return (bool) $this->buffer[$rownum];
+            }
+        }
+
+        if (!$this->_skipLimitOffset()) {
+            return false;
+        }
+
+        $buffer = true;
+        while ((is_null($rownum) || $this->buffer_rownum < $rownum)
+            && (!$this->limit || $this->buffer_rownum < $this->limit)
+            && ($buffer = @ibase_fetch_row($this->result))
+        ) {
+            ++$this->buffer_rownum;
+            $this->buffer[$this->buffer_rownum] = $buffer;
+        }
+
+        if (!$buffer) {
+            ++$this->buffer_rownum;
+            $this->buffer[$this->buffer_rownum] = false;
+            return false;
+        } elseif ($this->limit && $this->buffer_rownum >= $this->limit) {
+            ++$this->buffer_rownum;
+            $this->buffer[$this->buffer_rownum] = false;
+        }
+        return true;
+    }
+
+    // }}}
+    // {{{ 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, $rownum = null)
+    {
+        if ($this->result === true) {
+            //query successfully executed, but without results...
+            $null = null;
+            return $null;
+        }
+        if (is_null($this->result)) {
+            $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'fetchRow: resultset has already been freed');
+            return $err;
+        }
+        if (!is_null($rownum)) {
+            $seek = $this->seek($rownum);
+            if (PEAR::isError($seek)) {
+                return $seek;
+            }
+        }
+        $target_rownum = $this->rownum + 1;
+        if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
+            $fetchmode = $this->db->fetchmode;
+        }
+        if (!$this->_fillBuffer($target_rownum)) {
+            $null = null;
+            return $null;
+        }
+        $row = $this->buffer[$target_rownum];
+        if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
+            $column_names = $this->getColumnNames();
+            foreach ($column_names as $name => $i) {
+                $column_names[$name] = $row[$i];
+            }
+            $row = $column_names;
+        }
+        if (($mode = ($this->db->options['portability'] & MDB2_PORTABILITY_RTRIM)
+            + ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL))
+        ) {
+            $this->db->_fixResultArrayValues($row, $mode);
+        }
+        if (!empty($this->values)) {
+            $this->_assignBindColumns($row);
+        }
+        if (!empty($this->types)) {
+            $row = $this->db->datatype->convertResultRow($this->types, $row);
+        }
+        if ($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;
+    }
+
+    // }}}
+    // {{{ 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 (is_null($this->result)) {
+            return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'seek: resultset has already been freed');
+        }
+        $this->rownum = $rownum - 1;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ valid()
+
+    /**
+     * check if the end of the result set has been reached
+     *
+     * @return mixed true or false on sucess, a MDB2 error on failure
+     * @access public
+     */
+    function valid()
+    {
+        if (is_null($this->result)) {
+            return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'valid: resultset has already been freed');
+        }
+        if ($this->_fillBuffer($this->rownum + 1)) {
+            return true;
+        }
+        return false;
+    }
+
+    // }}}
+    // {{{ numRows()
+
+    /**
+     * returns the number of rows in a result object
+     *
+     * @return mixed MDB2 Error Object or the number of rows
+     * @access public
+     */
+    function numRows()
+    {
+        if (is_null($this->result)) {
+            return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                'seek: resultset has already been freed');
+        }
+        $this->_fillBuffer();
+        return $this->buffer_rownum;
+    }
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Free the internal resources associated with $result.
+     *
+     * @return boolean true on success, false if $result is invalid
+     * @access public
+     */
+    function free()
+    {
+        $this->buffer = null;
+        $this->buffer_rownum = null;
+        $free = parent::free();
+    }
+
+    // }}}
+}
+
+class MDB2_Statement_ibase 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)
+    {
+        $isManip = MDB2::isManip($this->query);
+        $this->db->last_query = $this->query;
+        $this->db->debug($this->query, 'execute');
+        if ($this->db->getOption('disable_query')) {
+            if ($isManip) {
+                $return = 0;
+                return $return;
+            }
+            $null = null;
+            return $null;
+        }
+
+        $connected = $this->db->connect();
+        if (PEAR::isError($connected)) {
+            return $connected;
+        }
+        $connection = $this->db->in_transaction
+            ? $this->db->transaction_id : $this->db->connection;
+
+        $parameters = array(0 => $this->statement);
+        $i = 0;
+        foreach ($this->values as $parameter => $value) {
+            $type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
+            $parameters[] = $this->db->quote($value, $type, false);
+            ++$i;
+        }
+
+        $result = call_user_func_array('ibase_execute', $parameters);
+        if ($result === false) {
+            $err =& $this->db->raiseError();
+            return $err;
+        }
+
+        if ($isManip) {
+            $affected_rows = (function_exists('ibase_affected_rows') ? ibase_affected_rows($connection) : 0);
+            return $affected_rows;
+        }
+
+        $result =& $this->db->_wrapResult($result, $this->types,
+            $result_class, $result_wrap_class, $this->row_limit, $this->row_offset);
+        return $result;
+    }
+
+    // }}}
+
+    // }}}
+    // {{{ free()
+
+    /**
+     * Release resources allocated for the specified prepared query.
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     * @access public
+     */
+    function free()
+    {
+        if (!@ibase_free_query($this->statement)) {
+            return $this->db->raiseError();
+        }
+        return MDB2_OK;
+    }
+}
+?>
\ No newline at end of file