class.ux_t3lib_db.php

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<?php
/***************************************************************
*  Copyright notice
*
*  (c) 2004-2009 Kasper Skaarhoj (kasperYYYY@typo3.com)
*  (c) 2004-2009 Karsten Dambekalns <karsten@typo3.org>
*  (c) 2009-2010 Xavier Perseguers <typo3@perseguers.ch>
*  All rights reserved
*
*  This script is part of the TYPO3 project. The TYPO3 project is
*  free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  The GNU General Public License can be found at
*  http://www.gnu.org/copyleft/gpl.html.
*  A copy is found in the textfile GPL.txt and important notices to the license
*  from the author is found in LICENSE.txt distributed with these scripts.
*
*
*  This script is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*
*  This copyright notice MUST APPEAR in all copies of the script!
***************************************************************/
/**
 * Contains a database abstraction layer class for TYPO3
 *
 * $Id: class.ux_t3lib_db.php 29977 2010-02-13 13:18:32Z xperseguers $
 *
 * @author  Kasper Skaarhoj <kasper@typo3.com>
 * @author  Karsten Dambekalns <k.dambekalns@fishfarm.de>
 * @author  Xavier Perseguers <typo3@perseguers.ch>
 */
/**
 * [CLASS/FUNCTION INDEX of SCRIPT]
 *
 *
 *
 *  123: class ux_t3lib_DB extends t3lib_DB
 *  169:     function ux_t3lib_DB()
 *  184:     function initInternalVariables()
 *
 *              SECTION: Query Building (Overriding parent methods)
 *  217:     function exec_INSERTquery($table,$fields_values)
 *  275:     function exec_UPDATEquery($table,$where,$fields_values)
 *  334:     function exec_DELETEquery($table,$where)
 *  387:     function exec_SELECTquery($select_fields,$from_table,$where_clause,$groupBy = '',$orderBy = '',$limit = '')
 *
 *              SECTION: Creates an INSERT SQL-statement for $table from the array with field/value pairs $fields_values.
 *  533:     function SELECTquery($select_fields,$from_table,$where_clause,$groupBy = '',$orderBy = '',$limit = '')
 *  556:     function quoteSelectFields(&$select_fields)
 *  573:     function quoteFromTables(&$from_table)
 *  595:     function quoteWhereClause(&$where_clause)
 *  620:     function quoteGroupBy(&$groupBy)
 *  637:     function quoteOrderBy(&$orderBy)
 *
 *              SECTION: Various helper functions
 *  663:     function quoteStr($str, $table)
 *
 *              SECTION: SQL wrapper functions (Overriding parent methods)
 *  707:     function sql_error()
 *  734:     function sql_num_rows(&$res)
 *  760:     function sql_fetch_assoc(&$res)
 *  808:     function sql_fetch_row(&$res)
 *  842:     function sql_free_result(&$res)
 *  868:     function sql_insert_id()
 *  893:     function sql_affected_rows()
 *  919:     function sql_data_seek(&$res,$seek)
 *  946:     function sql_field_type(&$res,$pointer)
 *
 *              SECTION: Legacy functions, bound to _DEFAULT handler. (Overriding parent methods)
 *  987:     function sql($db,$query)
 *  999:     function sql_query($query)
 * 1035:     function sql_pconnect($TYPO3_db_host, $TYPO3_db_username, $TYPO3_db_password)
 * 1055:     function sql_select_db($TYPO3_db)
 *
 *              SECTION: SQL admin functions
 * 1086:     function admin_get_tables()
 * 1149:     function admin_get_fields($tableName)
 * 1210:     function admin_get_keys($tableName)
 * 1270:     function admin_query($query)
 *
 *              SECTION: Handler management
 * 1333:     function handler_getFromTableList($tableList)
 * 1379:     function handler_init($handlerKey)
 *
 *              SECTION: Table/Field mapping
 * 1488:     function map_needMapping($tableList,$fieldMappingOnly = FALSE)
 * 1524:     function map_assocArray($input,$tables,$rev = FALSE)
 * 1573:     function map_remapSELECTQueryParts(&$select_fields,&$from_table,&$where_clause,&$groupBy,&$orderBy)
 * 1615:     function map_sqlParts(&$sqlPartArray, $defaultTable)
 * 1650:     function map_genericQueryParsed(&$parsedQuery)
 * 1717:     function map_fieldNamesInArray($table,&$fieldArray)
 *
 *              SECTION: Debugging
 * 1758:     function debugHandler($function,$execTime,$inData)
 * 1823:     function debug_log($query,$ms,$data,$join,$errorFlag)
 * 1849:     function debug_explain($query)
 *
 * TOTAL FUNCTIONS: 41
 * (This index is automatically created/updated by the extension "extdeveval")
 *
 */
/**
 * TYPO3 database abstraction layer
 *
 * @author  Kasper Skaarhoj <kasper@typo3.com>
 * @author  Karsten Dambekalns <k.dambekalns@fishfarm.de>
 * @package TYPO3
 * @subpackage tx_dbal
 */
class ux_t3lib_DB extends t3lib_DB {

        // Internal, static:
    var $printErrors = FALSE;   // Enable output of SQL errors after query executions. Set through TYPO3_CONF_VARS, see init()
    var $debug = FALSE;         // Enable debug mode. Set through TYPO3_CONF_VARS, see init()
    var $conf = array();        // Configuration array, copied from TYPO3_CONF_VARS in constructor.

    var $mapping = array();     // See manual.
    var $table2handlerKeys = array();   // See manual.
    var $handlerCfg = array(    // See manual.
        '_DEFAULT' => array(
                'type' => 'native',
                'config' => array(
                    'username' => '',   // Set by default (overridden)
                    'password' => '',   // Set by default (overridden)
                    'host' => '',   // Set by default (overridden)
                    'database' => '',   // Set by default (overridden)
                    'driver' => '', // ONLY "adodb" type; eg. "mysql"
                    'sequenceStart' => 1,   // ONLY "adodb", first number in sequences/serials/...
                    'useNameQuote' => 0 // ONLY "adodb", whether to use NameQuote() method from ADOdb to quote names
                )
        ),
    );


        // Internal, dynamic:
    var $handlerInstance = array();             // Contains instance of the handler objects as they are created. Exception is the native mySQL calls which are registered as an array with keys "handlerType" = "native" and "link" pointing to the link resource for the connection.
    var $lastHandlerKey = '';                   // Storage of the handler key of last ( SELECT) query - used for subsequent fetch-row calls etc.
    var $lastQuery = '';                        // Storage of last SELECT query
    var $lastParsedAndMappedQueryArray = array();   // Query array, the last one parsed

    var $resourceIdToTableNameMap = array();    // Mapping of resource ids to table names.

        // Internal, caching:
    var $cache_handlerKeyFromTableList = array();           // Caching handlerKeys for table lists
    var $cache_mappingFromTableList = array();          // Caching mapping information for table lists
    var $cache_autoIncFields = array(); // parsed SQL from standard DB dump file
    var $cache_fieldType = array(); // field types for tables/fields
    var $cache_primaryKeys = array(); // primary keys

    /**
     * SQL parser
     *
     * @var tx_dbal_sqlengine
     */
    var $SQLparser;

    /**
     * Installer
     *
     * @var t3lib_install
     */
    var $Installer;


    /**
     * Constructor.
     * Creates SQL parser object and imports configuration from $TYPO3_CONF_VARS['EXTCONF']['dbal']
     */
    public function __construct() {
            // Set SQL parser object for internal use:
        $this->SQLparser = t3lib_div::makeInstance('tx_dbal_sqlengine');
        $this->Installer = t3lib_div::makeInstance('t3lib_install');

            // Set internal variables with configuration:
        $this->conf = $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['dbal'];
        $this->initInternalVariables();
    }

    /**
     * Setting internal variables from $this->conf.
     *
     * @return  void
     */
    protected function initInternalVariables() {
            // Set outside configuration:
        if (isset($this->conf['mapping'])) {
            $this->mapping = $this->conf['mapping'];
        }
        if (isset($this->conf['table2handlerKeys'])) {
            $this->table2handlerKeys = $this->conf['table2handlerKeys'];
        }
        if (isset($this->conf['handlerCfg'])) {
            $this->handlerCfg = $this->conf['handlerCfg'];
        }

        $this->cacheFieldInfo();
            // Debugging settings:
        $this->printErrors = $this->conf['debugOptions']['printErrors'] ? TRUE : FALSE;
        $this->debug = $this->conf['debugOptions']['enabled'] ? TRUE : FALSE;
    }

    /**
     * Clears the cached field information file.
     * 
     * @return void
     */
    public function clearCachedFieldInfo() {
        if (file_exists(PATH_typo3conf . 'temp_fieldInfo.php')) {
            unlink(PATH_typo3conf . 'temp_fieldInfo.php');  
        }
    }

    /**
     * Caches the field information.
     * 
     * @return void
     */
    public function cacheFieldInfo() {
        $extSQL = '';
        $parsedExtSQL = array();

            // try to fetch cached file first
            // file is removed when admin_query() is called
        if (file_exists(PATH_typo3conf . 'temp_fieldInfo.php')) {
            $fdata = unserialize(t3lib_div::getUrl(PATH_typo3conf . 'temp_fieldInfo.php'));
            $this->cache_autoIncFields = $fdata['incFields'];
            $this->cache_fieldType = $fdata['fieldTypes'];
            $this->cache_primaryKeys = $fdata['primaryKeys'];
        } else {
                // handle stddb.sql, parse and analyze
            $extSQL = t3lib_div::getUrl(PATH_site . 't3lib/stddb/tables.sql');
            $parsedExtSQL = $this->Installer->getFieldDefinitions_fileContent($extSQL);
            $this->analyzeFields($parsedExtSQL);

                // loop over all installed extensions
            foreach ($GLOBALS['TYPO3_LOADED_EXT'] as $ext => $v) {
                if (!is_array($v) || !isset($v['ext_tables.sql'])) {
                    continue;
                }

                    // fetch db dump (if any) and parse it, then analyze
                $extSQL = t3lib_div::getUrl($v['ext_tables.sql']);
                $parsedExtSQL = $this->Installer->getFieldDefinitions_fileContent($extSQL);
                $this->analyzeFields($parsedExtSQL);
            }

            $cachedFieldInfo = array('incFields' => $this->cache_autoIncFields, 'fieldTypes' => $this->cache_fieldType, 'primaryKeys' => $this->cache_primaryKeys);
            $cachedFieldInfo = serialize($this->mapCachedFieldInfo($cachedFieldInfo));

                // write serialized content to file
            t3lib_div::writeFile(PATH_typo3conf . 'temp_fieldInfo.php', $cachedFieldInfo);

            if (strcmp(t3lib_div::getUrl(PATH_typo3conf . 'temp_fieldInfo.php'), $cachedFieldInfo)) {
                die('typo3temp/temp_incfields.php was NOT updated properly (written content didn\'t match file content) - maybe write access problem?');
            }
        }
    }

    /**
     * Analyzes fields and adds the extracted information to the field type, auto increment and primary key info caches.
     *
     * @param array $parsedExtSQL The output produced by t3lib_install::getFieldDefinitions_fileContent()
     * @return void
     * @see t3lib_install::getFieldDefinitions_fileContent()
     */
    protected function analyzeFields($parsedExtSQL) {
        foreach ($parsedExtSQL as $table => $tdef) {
            if (is_array($tdef['fields'])) {
                foreach ($tdef['fields'] as $field => $fdef) {
                    $fdef = $this->SQLparser->parseFieldDef($fdef);
                    $this->cache_fieldType[$table][$field]['type'] = $fdef['fieldType'];
                    $this->cache_fieldType[$table][$field]['metaType'] = $this->MySQLMetaType($fdef['fieldType']);
                    $this->cache_fieldType[$table][$field]['notnull'] = (isset($fdef['featureIndex']['NOTNULL']) && !$this->SQLparser->checkEmptyDefaultValue($fdef['featureIndex'])) ? 1 : 0;
                    if (isset($fdef['featureIndex']['DEFAULT'])) {
                        $default = $fdef['featureIndex']['DEFAULT']['value'][0];
                        if (isset($fdef['featureIndex']['DEFAULT']['value'][1])) {
                            $default = $fdef['featureIndex']['DEFAULT']['value'][1] . $default . $fdef['featureIndex']['DEFAULT']['value'][1];
                        }
                        $this->cache_fieldType[$table][$field]['default'] = $default;
                    }
                    if (isset($fdef['featureIndex']['AUTO_INCREMENT'])) {
                        $this->cache_autoIncFields[$table] = $field;
                    }
                    if (isset($tdef['keys']['PRIMARY'])) {
                        $this->cache_primaryKeys[$table] = substr($tdef['keys']['PRIMARY'], 13, -1);
                    }
                }
            }
        }
    }

    /**
    * This function builds all definitions for mapped tables and fields
    * @see cacheFieldInfo()
    */
    protected function mapCachedFieldInfo($fieldInfo) {
        if (is_array($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['dbal']['mapping'])) {
            foreach ($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['dbal']['mapping'] as $mappedTable => $mappedConf) {
                if (array_key_exists($mappedTable, $fieldInfo['incFields'])) {
                    $mappedTableAlias = $mappedConf['mapTableName'];
                    if (isset($mappedConf['mapFieldNames'][$fieldInfo['incFields'][$mappedTable]])) {
                        $fieldInfo['incFields'][$mappedTableAlias] = $mappedConf['mapFieldNames'][$fieldInfo['incFields'][$mappedTable]];
                    } else {
                        $fieldInfo['incFields'][$mappedTableAlias] = $fieldInfo['incFields'][$mappedTable]; 
                    }
                }

                if (array_key_exists($mappedTable, $fieldInfo['fieldTypes'])) {
                    foreach ($fieldInfo['fieldTypes'][$mappedTable] as $field => $fieldConf) {
                        $tempMappedFieldConf[$mappedConf['mapFieldNames'][$field]] = $fieldConf;
                    }

                    $fieldInfo['fieldTypes'][$mappedConf['mapTableName']] = $tempMappedFieldConf;
                }

                if (array_key_exists($mappedTable, $fieldInfo['primaryKeys'])) {
                    $mappedTableAlias = $mappedConf['mapTableName'];
                    if (isset($mappedConf['mapFieldNames'][$fieldInfo['primaryKeys'][$mappedTable]])) {
                        $fieldInfo['primaryKeys'][$mappedTableAlias] = $mappedConf['mapFieldNames'][$fieldInfo['primaryKeys'][$mappedTable]];
                    } else {
                        $fieldInfo['primaryKeys'][$mappedTableAlias] = $fieldInfo['primaryKeys'][$mappedTable]; 
                    }
                }
            }
        }

        return $fieldInfo;
    }


    /************************************
    *
    * Query Building (Overriding parent methods)
    * These functions are extending counterparts in the parent class.
    *
    **************************************/

    /* From the ADOdb documentation, this is what we do (_Execute for SELECT, _query for the other actions)

    Execute() is the default way to run queries. You can use the low-level functions _Execute() and _query() to reduce query overhead.
    Both these functions share the same parameters as Execute().

    If you do not have any bind parameters or your database supports binding (without emulation), then you can call _Execute() directly.
    Calling this function bypasses bind emulation. Debugging is still supported in _Execute().

    If you do not require debugging facilities nor emulated binding, and do not require a recordset to be returned, then you can call _query.
    This is great for inserts, updates and deletes. Calling this function bypasses emulated binding, debugging, and recordset handling. Either
    the resultid, TRUE or FALSE are returned by _query().
    */

    /**
     * Inserts a record for $table from the array with field/value pairs $fields_values.
     *
     * @param   string      Table name
     * @param   array       Field values as key=>value pairs. Values will be escaped internally. Typically you would fill an array like "$insertFields" with 'fieldname'=>'value' and pass it to this function as argument.
     * @param mixed    List/array of keys NOT to quote (eg. SQL functions)
     * @return  mixed       Result from handler, usually TRUE when success and FALSE on failure
     */
    public function exec_INSERTquery($table, $fields_values, $no_quote_fields = '') {

        if ($this->debug) {
            $pt = t3lib_div::milliseconds();
        }

            // Do field mapping if needed:
        $ORIG_tableName = $table;
        if ($tableArray = $this->map_needMapping($table)) {

                // Field mapping of array:
            $fields_values = $this->map_assocArray($fields_values, $tableArray);

                // Table name:
            if ($this->mapping[$table]['mapTableName']) {
                $table = $this->mapping[$table]['mapTableName'];
            }
        }
            // Select API:
        $this->lastHandlerKey = $this->handler_getFromTableList($ORIG_tableName);
        switch ((string)$this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $this->lastQuery = $this->INSERTquery($table,$fields_values,$no_quote_fields);
                if (is_string($this->lastQuery)) {
                    $sqlResult = mysql_query($this->lastQuery, $this->handlerInstance[$this->lastHandlerKey]['link']);
                } else {
                    $sqlResult = mysql_query($this->lastQuery[0], $this->handlerInstance[$this->lastHandlerKey]['link']);
                    foreach ($this->lastQuery[1] as $field => $content) {
                        mysql_query('UPDATE ' . $this->quoteFromTables($table) . ' SET ' . $this->quoteFromTables($field) . '=' . $this->fullQuoteStr($content, $table) . ' WHERE ' . $this->quoteWhereClause($where), $this->handlerInstance[$this->lastHandlerKey]['link']);
                    }
                }
                break;
            case 'adodb':
                    // auto generate ID for auto_increment fields if not present (static import needs this!)
                    // should we check the table name here (static_*)?
                if (isset($this->cache_autoIncFields[$table])) {
                    if (isset($fields_values[$this->cache_autoIncFields[$table]])) {
                        $new_id = $fields_values[$this->cache_autoIncFields[$table]];
                        if ($table != 'tx_dbal_debuglog') {
                            $this->handlerInstance[$this->lastHandlerKey]->last_insert_id = $new_id;
                        }
                    } else {
                        $new_id = $this->handlerInstance[$this->lastHandlerKey]->GenID($table.'_'.$this->cache_autoIncFields[$table], $this->handlerInstance[$this->lastHandlerKey]->sequenceStart);
                        $fields_values[$this->cache_autoIncFields[$table]] = $new_id;
                        if ($table != 'tx_dbal_debuglog') {
                            $this->handlerInstance[$this->lastHandlerKey]->last_insert_id = $new_id;
                        }
                    }
                }

                $this->lastQuery = $this->INSERTquery($table,$fields_values,$no_quote_fields);
                if (is_string($this->lastQuery)) {
                    $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->_query($this->lastQuery,FALSE);
                } else {
                    $this->handlerInstance[$this->lastHandlerKey]->StartTrans();
                    if (strlen($this->lastQuery[0])) {
                        $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->_query($this->lastQuery[0],FALSE);
                    }
                    if (is_array($this->lastQuery[1])) {
                        foreach ($this->lastQuery[1] as $field => $content) {
                            if (empty($content)) continue;

                            if (isset($this->cache_autoIncFields[$table]) && isset($new_id)) {
                                $this->handlerInstance[$this->lastHandlerKey]->UpdateBlob($this->quoteFromTables($table),$field,$content,$this->quoteWhereClause($this->cache_autoIncFields[$table].'='.$new_id));
                            } elseif (isset($this->cache_primaryKeys[$table])) {
                                $where = '';
                                $pks = explode(',', $this->cache_primaryKeys[$table]);
                                foreach ($pks as $pk) {
                                    if (isset($fields_values[$pk]))
                                    $where .= $pk.'='.$this->fullQuoteStr($fields_values[$pk], $table).' AND ';
                                }
                                $where = $this->quoteWhereClause($where.'1=1');
                                $this->handlerInstance[$this->lastHandlerKey]->UpdateBlob($this->quoteFromTables($table),$field,$content,$where);
                            } else {
                                $this->handlerInstance[$this->lastHandlerKey]->CompleteTrans(FALSE);
                                die('Could not update BLOB >>>> no WHERE clause found!'); // should never ever happen
                            }
                        }
                    }
                    if (is_array($this->lastQuery[2])) {
                        foreach ($this->lastQuery[2] as $field => $content) {
                            if (empty($content)) continue;

                            if (isset($this->cache_autoIncFields[$table]) && isset($new_id)) {
                                $this->handlerInstance[$this->lastHandlerKey]->UpdateClob($this->quoteFromTables($table),$field,$content,$this->quoteWhereClause($this->cache_autoIncFields[$table].'='.$new_id));
                            } elseif (isset($this->cache_primaryKeys[$table])) {
                                $where = '';
                                $pks = explode(',', $this->cache_primaryKeys[$table]);
                                foreach ($pks as $pk) {
                                    if (isset($fields_values[$pk]))
                                    $where .= $pk.'='.$this->fullQuoteStr($fields_values[$pk], $table).' AND ';
                                }
                                $where = $this->quoteWhereClause($where.'1=1');
                                $this->handlerInstance[$this->lastHandlerKey]->UpdateClob($this->quoteFromTables($table),$field,$content,$where);
                            } else {
                                $this->handlerInstance[$this->lastHandlerKey]->CompleteTrans(FALSE);
                                die('Could not update CLOB >>>> no WHERE clause found!'); // should never ever happen
                            }
                        }
                    }
                    $this->handlerInstance[$this->lastHandlerKey]->CompleteTrans();
                }
                break;
            case 'userdefined':
                $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->exec_INSERTquery($table,$fields_values,$no_quote_fields);
                break;
        }

        if ($this->printErrors && $this->sql_error()) {
            debug(array($this->lastQuery, $this->sql_error()));
        }

        if ($this->debug) {
            $this->debugHandler(
                'exec_INSERTquery',
                t3lib_div::milliseconds()-$pt,
                array(
                    'handlerType' => $hType,
                    'args' => array($table,$fields_values),
                    'ORIG_tablename' => $ORIG_tableName
                )
            );
        }
            // Return output:
        return $sqlResult;
    }

    /**
     * Creates and executes an INSERT SQL-statement for $table with multiple rows.
     * This method uses exec_INSERTquery() and is just a syntax wrapper to it.
     *
     * @param   string      Table name
     * @param   array       Field names
     * @param   array       Table rows. Each row should be an array with field values mapping to $fields
     * @param   string/array        See fullQuoteArray()
     * @return  mixed       Result from last handler, usually TRUE when success and FALSE on failure
     */
    public function exec_INSERTmultipleRows($table, array $fields, array $rows, $no_quote_fields = FALSE) {
        if ((string)$this->handlerCfg[$this->lastHandlerKey]['type'] === 'native') {
            return parent::exec_INSERTmultipleRows($table, $fields, $rows, $no_quote_fields);
        }

        foreach ($rows as $row) {
            $fields_values = array();
            foreach ($fields as $key => $value) {
                $fields_values[$value] = $row[$key];
            }
            $res = $this->exec_INSERTquery($table, $fields_values, $no_quote_fields);
        }

        return $res;
    }

    /**
     * Updates a record from $table
     *
     * @param   string      Database tablename
     * @param   string      WHERE clause, eg. "uid=1". NOTICE: You must escape values in this argument with $this->fullQuoteStr() yourself!
     * @param   array       Field values as key=>value pairs. Values will be escaped internally. Typically you would fill an array like "$updateFields" with 'fieldname'=>'value' and pass it to this function as argument.
     * @param mixed    List/array of keys NOT to quote (eg. SQL functions)
     * @return  mixed       Result from handler, usually TRUE when success and FALSE on failure
     */
    public function exec_UPDATEquery($table,$where,$fields_values,$no_quote_fields = '') {
        if ($this->debug) {
            $pt = t3lib_div::milliseconds();
        }

            // Do table/field mapping:
        $ORIG_tableName = $table;
        if ($tableArray = $this->map_needMapping($table)) {

                // Field mapping of array:
            $fields_values = $this->map_assocArray($fields_values,$tableArray);

                // Where clause table and field mapping:
            $whereParts = $this->SQLparser->parseWhereClause($where);
            $this->map_sqlParts($whereParts,$tableArray[0]['table']);
            $where = $this->SQLparser->compileWhereClause($whereParts, FALSE);

                // Table name:
            if ($this->mapping[$table]['mapTableName']) {
                $table = $this->mapping[$table]['mapTableName'];
            }
        }

            // Select API
        $this->lastHandlerKey = $this->handler_getFromTableList($ORIG_tableName);
        switch ((string)$this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $this->lastQuery = $this->UPDATEquery($table,$where,$fields_values,$no_quote_fields);
                if (is_string($this->lastQuery)) {
                    $sqlResult = mysql_query($this->lastQuery, $this->handlerInstance[$this->lastHandlerKey]['link']);
                }
                else {
                    $sqlResult = mysql_query($this->lastQuery[0], $this->handlerInstance[$this->lastHandlerKey]['link']);
                    foreach ($this->lastQuery[1] as $field => $content) {
                        mysql_query('UPDATE '.$this->quoteFromTables($table).' SET '.$this->quoteFromTables($field).'='.$this->fullQuoteStr($content,$table).' WHERE '.$this->quoteWhereClause($where), $this->handlerInstance[$this->lastHandlerKey]['link']);
                    }
                }
            break;
            case 'adodb':
                $this->lastQuery = $this->UPDATEquery($table,$where,$fields_values,$no_quote_fields);
                if (is_string($this->lastQuery)) {
                    $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->_query($this->lastQuery,FALSE);
                } else {
                    $this->handlerInstance[$this->lastHandlerKey]->StartTrans();
                    if (strlen($this->lastQuery[0])) {
                        $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->_query($this->lastQuery[0],FALSE);
                    }
                    if (is_array($this->lastQuery[1])) {
                        foreach ($this->lastQuery[1] as $field => $content) {
                            $this->handlerInstance[$this->lastHandlerKey]->UpdateBlob($this->quoteFromTables($table),$field,$content,$this->quoteWhereClause($where));
                        }
                    }
                    if (is_array($this->lastQuery[2])) {
                        foreach ($this->lastQuery[2] as $field => $content) {
                            $this->handlerInstance[$this->lastHandlerKey]->UpdateClob($this->quoteFromTables($table),$field,$content,$this->quoteWhereClause($where));
                        }
                    }
                    $this->handlerInstance[$this->lastHandlerKey]->CompleteTrans();
                }
                break;
            case 'userdefined':
                $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->exec_UPDATEquery($table,$where,$fields_values,$no_quote_fields);
                break;
        }

        if ($this->printErrors && $this->sql_error()) {
            debug(array($this->lastQuery, $this->sql_error()));
        }

        if ($this->debug) {
            $this->debugHandler(
                'exec_UPDATEquery',
                t3lib_div::milliseconds()-$pt,
                array(
                    'handlerType' => $hType,
                    'args' => array($table,$where, $fields_values),
                    'ORIG_from_table' => $ORIG_tableName
                )
            );
        }

            // Return result:
        return $sqlResult;
    }

    /**
     * Deletes records from table
     *
     * @param   string      Database tablename
     * @param   string      WHERE clause, eg. "uid=1". NOTICE: You must escape values in this argument with $this->fullQuoteStr() yourself!
     * @return  mixed       Result from handler
     */
    public function exec_DELETEquery($table, $where) {
        if ($this->debug) {
            $pt = t3lib_div::milliseconds();
        }

            // Do table/field mapping:
        $ORIG_tableName = $table;
        if ($tableArray = $this->map_needMapping($table)) {

                // Where clause:
            $whereParts = $this->SQLparser->parseWhereClause($where);
            $this->map_sqlParts($whereParts,$tableArray[0]['table']);
            $where = $this->SQLparser->compileWhereClause($whereParts, FALSE);

                // Table name:
            if ($this->mapping[$table]['mapTableName']) {
                $table = $this->mapping[$table]['mapTableName'];
            }
        }

            // Select API
        $this->lastHandlerKey = $this->handler_getFromTableList($ORIG_tableName);
        switch ((string)$this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $this->lastQuery = $this->DELETEquery($table,$where);
                $sqlResult = mysql_query($this->lastQuery, $this->handlerInstance[$this->lastHandlerKey]['link']);
                break;
            case 'adodb':
                $this->lastQuery = $this->DELETEquery($table,$where);
                $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->_query($this->lastQuery,FALSE);
                break;
            case 'userdefined':
                $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->exec_DELETEquery($table,$where);
                break;
        }

        if ($this->printErrors && $this->sql_error()) {
            debug(array($this->lastQuery, $this->sql_error()));
        }

        if ($this->debug) {
            $this->debugHandler(
                'exec_DELETEquery',
                t3lib_div::milliseconds()-$pt,
                array(
                    'handlerType' => $hType,
                    'args' => array($table,$where),
                    'ORIG_from_table' => $ORIG_tableName
                )
            );
        }

            // Return result:
        return $sqlResult;
    }

    /**
     * Selects records from Data Source
     *
     * @param   string $select_fields List of fields to select from the table. This is what comes right after "SELECT ...". Required value.
     * @param   string $from_table Table(s) from which to select. This is what comes right after "FROM ...". Required value.
     * @param   string $where_clause Optional additional WHERE clauses put in the end of the query. NOTICE: You must escape values in this argument with $this->fullQquoteStr() yourself! DO NOT PUT IN GROUP BY, ORDER BY or LIMIT!
     * @param   string $groupBy Optional GROUP BY field(s), if none, supply blank string.
     * @param   string $orderBy Optional ORDER BY field(s), if none, supply blank string.
     * @param   string $limit Optional LIMIT value ([begin,]max), if none, supply blank string.
     * @return  mixed       Result from handler. Typically object from DBAL layers.
     */
    public function exec_SELECTquery($select_fields, $from_table, $where_clause, $groupBy = '', $orderBy = '', $limit = '') {
        if ($this->debug) {
            $pt = t3lib_div::milliseconds();
        }

            // Map table / field names if needed:
        $ORIG_tableName = $from_table;  // Saving table names in $ORIG_from_table since $from_table is transformed beneath:
        if ($tableArray = $this->map_needMapping($ORIG_tableName)) {
            $this->map_remapSELECTQueryParts($select_fields,$from_table,$where_clause,$groupBy,$orderBy);   // Variables passed by reference!
        }

            // Get handler key and select API:
        $this->lastHandlerKey = $this->handler_getFromTableList($ORIG_tableName);
        $hType = (string)$this->handlerCfg[$this->lastHandlerKey]['type'];
        switch ($hType) {
            case 'native':
                $this->lastQuery = $this->SELECTquery($select_fields,$from_table,$where_clause,$groupBy,$orderBy,$limit);
                $sqlResult = mysql_query($this->lastQuery, $this->handlerInstance[$this->lastHandlerKey]['link']);
                $this->resourceIdToTableNameMap[(string)$sqlResult] = $ORIG_tableName;
                break;
            case 'adodb':
                if ($limit != '') {
                    $splitLimit = t3lib_div::intExplode(',', $limit);       // Splitting the limit values:
                    if ($splitLimit[1]) {   // If there are two parameters, do mapping differently than otherwise:
                        $numrows = $splitLimit[1];
                        $offset = $splitLimit[0];
                    } else {
                        $numrows = $splitLimit[0];
                        $offset = 0;
                    }

                    $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->SelectLimit($this->SELECTquery($select_fields,$from_table,$where_clause,$groupBy,$orderBy), $numrows, $offset);
                    $this->lastQuery = $sqlResult->sql;
                } else {
                    $this->lastQuery = $this->SELECTquery($select_fields,$from_table,$where_clause,$groupBy,$orderBy);
                    $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->_Execute($this->lastQuery);
                }

                $sqlResult->TYPO3_DBAL_handlerType = 'adodb';   // Setting handler type in result object (for later recognition!)
                $sqlResult->TYPO3_DBAL_tableList = $ORIG_tableName;
                break;
            case 'userdefined':
                $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->exec_SELECTquery($select_fields,$from_table,$where_clause,$groupBy,$orderBy,$limit);
                if (is_object($sqlResult)) {
                    $sqlResult->TYPO3_DBAL_handlerType = 'userdefined'; // Setting handler type in result object (for later recognition!)
                    $sqlResult->TYPO3_DBAL_tableList = $ORIG_tableName;
                }
                break;
        }

        if ($this->printErrors && $this->sql_error()) {
            debug(array($this->lastQuery, $this->sql_error()));
        }

        if ($this->debug) {
            $this->debugHandler(
                'exec_SELECTquery',
                t3lib_div::milliseconds()-$pt,
                array(
                    'handlerType' => $hType,
                    'args' => array($from_table,$select_fields,$where_clause,$groupBy,$orderBy,$limit),
                    'ORIG_from_table' => $ORIG_tableName
                )
            );
        }

            // Return result handler.
        return $sqlResult;
    }

    /**
     * Truncates a table.
     * 
     * @param   string      Database tablename
     * @return  mixed       Result from handler
     */
    public function exec_TRUNCATEquery($table) {
        if ($this->debug) {
            $pt = t3lib_div::milliseconds();
        }

            // Do table/field mapping:
        $ORIG_tableName = $table;
        if ($tableArray = $this->map_needMapping($table)) {
                // Table name:
            if ($this->mapping[$table]['mapTableName']) {
                $table = $this->mapping[$table]['mapTableName'];
            }
        }

            // Select API
        $this->lastHandlerKey = $this->handler_getFromTableList($ORIG_tableName);
        switch ((string)$this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $this->lastQuery = $this->TRUNCATEquery($table);
                $sqlResult = mysql_query($this->lastQuery, $this->handlerInstance[$this->lastHandlerKey]['link']);
                break;
            case 'adodb':
                $this->lastQuery = $this->TRUNCATEquery($table);
                $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->_query($this->lastQuery, FALSE);
                break;
            case 'userdefined':
                $sqlResult = $this->handlerInstance[$this->lastHandlerKey]->exec_TRUNCATEquery($table,$where);
                break;
        }

        if ($this->printErrors && $this->sql_error()) {
            debug(array($this->lastQuery, $this->sql_error()));
        }

        if ($this->debug) {
            $this->debugHandler(
                'exec_TRUNCATEquery',
                t3lib_div::milliseconds() - $pt,
                array(
                    'handlerType' => $hType,
                    'args' => array($table),
                    'ORIG_from_table' => $ORIG_tableName
                )
            );
        }

            // Return result:
        return $sqlResult;
    }

    /**
     * Executes a query.
     * EXPERIMENTAL since TYPO3 4.4.
     * 
     * @param array $queryParts SQL parsed by method parseSQL() of t3lib_sqlparser
     * @return pointer Result pointer / DBAL object
     * @see ux_t3lib_db::sql_query()
     */
    protected function exec_query(array $queryParts) {
        switch ($queryParts['type']) {
            case 'SELECT':
                $selectFields = $this->SQLparser->compileFieldList($queryParts['SELECT']);
                $fromTables = $this->SQLparser->compileFromTables($queryParts['FROM']);
                $whereClause = isset($queryParts['WHERE']) ? $this->SQLparser->compileWhereClause($queryParts['WHERE']) : '1=1';
                $groupBy = isset($queryParts['GROUPBY']) ? $this->SQLparser->compileWhereClause($queryParts['GROUPBY']) : '';
                $orderBy = isset($queryParts['GROUPBY']) ? $this->SQLparser->compileWhereClause($queryParts['ORDERBY']) : '';
                $limit = isset($queryParts['LIMIT']) ? $this->SQLparser->compileWhereClause($queryParts['LIMIT']) : '';
                return $this->exec_SELECTquery($selectFields, $fromTables, $whereClause, $groupBy, $orderBy, $limit);

            case 'UPDATE':
                $table = $queryParts['TABLE'];
                $fields = array();
                foreach ($components['FIELDS'] as $fN => $fV) {
                    $fields[$fN] = $fV[0];
                }
                $whereClause = isset($queryParts['WHERE']) ? $this->SQLparser->compileWhereClause($queryParts['WHERE']) : '1=1';
                return $this->exec_UPDATEquery($table, $whereClause, $fields);

            case 'INSERT':
                $table = $queryParts['TABLE'];
                $values = array();
                if (isset($queryParts['VALUES_ONLY']) && is_array($queryParts['VALUES_ONLY'])) {
                    $fields = $GLOBALS['TYPO3_DB']->cache_fieldType[$table];
                    $fc = 0;
                    foreach ($fields as $fn => $fd) {
                        $values[$fn] = $queryParts['VALUES_ONLY'][$fc++][0];
                    }
                } else {
                    foreach ($queryParts['FIELDS'] as $fN => $fV) {
                        $values[$fN] = $fV[0];
                    }
                }
                return $this->exec_INSERTquery($table, $values);
                
            case 'DELETE':
                $table = $queryParts['TABLE'];
                $whereClause = isset($queryParts['WHERE']) ? $this->SQLparser->compileWhereClause($queryParts['WHERE']) : '1=1';
                return $this->exec_DELETEquery($table, $whereClause);

            case 'TRUNCATETABLE':
                $table = $queryParts['TABLE'];
                return $this->exec_TRUNCATEquery($table);
        }
    }



    /**************************************
    *
    * Query building
    *
    **************************************/

    /**
     * Creates an INSERT SQL-statement for $table from the array with field/value pairs $fields_values.
     * Usage count/core: 4
     *
     * @param   string      See exec_INSERTquery()
     * @param   array       See exec_INSERTquery()
     * @param mixed     See exec_INSERTquery()
     * @return  mixed       Full SQL query for INSERT as string or array (unless $fields_values does not contain any elements in which case it will be FALSE). If BLOB fields will be affected and one is not running the native type, an array will be returned, where 0 => plain SQL, 1 => fieldname/value pairs of BLOB fields
     */
    public function INSERTquery($table, $fields_values, $no_quote_fields = '') {
            // Table and fieldnames should be "SQL-injection-safe" when supplied to this function (contrary to values in the arrays which may be insecure).
        if (is_array($fields_values) && count($fields_values)) {

            if (is_string($no_quote_fields)) {
                $no_quote_fields = explode(',', $no_quote_fields);
            } elseif (!is_array($no_quote_fields)) {
                $no_quote_fields = array();
            }

            $blobfields = array();
            $nArr = array();
            foreach ($fields_values as $k => $v) {
                if (!$this->runningNative() && $this->sql_field_metatype($table, $k) == 'B') {
                        // we skip the field in the regular INSERT statement, it is only in blobfields
                    $blobfields[$this->quoteFieldNames($k)] = $v;
                } elseif (!$this->runningNative() && $this->sql_field_metatype($table, $k) == 'XL') {
                        // we skip the field in the regular INSERT statement, it is only in clobfields
                    $clobfields[$this->quoteFieldNames($k)] = $v;
                } else {
                        // Add slashes old-school:
                        // cast numerical values
                    $mt = $this->sql_field_metatype($table, $k);
                    if ($mt{0} == 'I') {
                        $v = (int)$v;
                    } else if ($mt{0} == 'F') {
                        $v = (double)$v;
                    }

                    $nArr[$this->quoteFieldNames($k)] = (!in_array($k,$no_quote_fields)) ? $this->fullQuoteStr($v, $table) : $v;
                }
            }

            if (count($blobfields) || count($clobfields)) {
                if (count($nArr)) {
                    $query[0] = 'INSERT INTO ' . $this->quoteFromTables($table) . '
                    (
                        ' . implode(',
                        ', array_keys($nArr)) . '
                    ) VALUES (
                        ' . implode(',
                        ', $nArr) . '
                    )';
                }
                if (count($blobfields)) $query[1] = $blobfields;
                if (count($clobfields)) $query[2] = $clobfields;
                if ($this->debugOutput || $this->store_lastBuiltQuery) $this->debug_lastBuiltQuery = $query[0];
            } else {
                $query = 'INSERT INTO '.$this->quoteFromTables($table).'
                (
                    ' . implode(',
                    ', array_keys($nArr)) . '
                ) VALUES (
                    ' . implode(',
                    ', $nArr) . '
                )';

                if ($this->debugOutput || $this->store_lastBuiltQuery) $this->debug_lastBuiltQuery = $query;
            }

            return $query;
        }
    }

    /**
     * Creates an INSERT SQL-statement for $table with multiple rows.
     * This method will create multiple INSERT queries concatenated with ';'
     *
     * @param   string      Table name
     * @param   array       Field names
     * @param   array       Table rows. Each row should be an array with field values mapping to $fields
     * @param   string/array        See fullQuoteArray()
     * @return  array       Full SQL query for INSERT as array of strings (unless $fields_values does not contain any elements in which case it will be FALSE). If BLOB fields will be affected and one is not running the native type, an array will be returned for each row, where 0 => plain SQL, 1 => fieldname/value pairs of BLOB fields.
     */
    public function INSERTmultipleRows($table, array $fields, array $rows, $no_quote_fields = FALSE) {
        if ((string)$this->handlerCfg[$this->lastHandlerKey]['type'] === 'native') {
            return parent::INSERTmultipleRows($table, $fields, $rows, $no_quote_fields);
        }

        $result = array();

        foreach ($rows as $row) {
            $fields_values = array();
            foreach ($fields as $key => $value) {
                $fields_values[$value] = $row[$key];
            }
            $rowQuery = $this->INSERTquery($table, $fields_values, $no_quote_fields);
            if (is_array($rowQuery)) {
                $result[] = $rowQuery;
            } else {
                $result[][0] = $rowQuery;
            }
        }

        return $result;
    }

    /**
     * Creates an UPDATE SQL-statement for $table where $where-clause (typ. 'uid=...') from the array with field/value pairs $fields_values.
     * Usage count/core: 6
     *
     * @param   string      See exec_UPDATEquery()
     * @param   string      See exec_UPDATEquery()
     * @param   array       See exec_UPDATEquery()
     * @param mixed     See exec_UPDATEquery()
     * @return  mixed       Full SQL query for UPDATE as string or array (unless $fields_values does not contain any elements in which case it will be FALSE). If BLOB fields will be affected and one is not running the native type, an array will be returned, where 0 => plain SQL, 1 => fieldname/value pairs of BLOB fields
     */
    public function UPDATEquery($table, $where, $fields_values, $no_quote_fields = '') {
            // Table and fieldnames should be "SQL-injection-safe" when supplied to this function (contrary to values in the arrays which may be insecure).
        if (is_string($where)) {
            if (is_array($fields_values) && count($fields_values)) {

                if (is_string($no_quote_fields)) {
                    $no_quote_fields = explode(',', $no_quote_fields);
                } elseif (!is_array($no_quote_fields)) {
                    $no_quote_fields = array();
                }

                $blobfields = array();
                $nArr = array();
                foreach ($fields_values as $k => $v) {
                    if (!$this->runningNative() && $this->sql_field_metatype($table, $k) == 'B') {
                            // we skip the field in the regular UPDATE statement, it is only in blobfields
                        $blobfields[$this->quoteFieldNames($k)] = $v;
                    } elseif (!$this->runningNative() && $this->sql_field_metatype($table, $k) == 'XL') {
                                // we skip the field in the regular UPDATE statement, it is only in clobfields
                            $clobfields[$this->quoteFieldNames($k)] = $v;
                    } else {
                            // Add slashes old-school:
                            // cast numeric values
                        $mt = $this->sql_field_metatype($table, $k);
                        if ($mt{0} == 'I') {
                            $v = (int)$v;
                        } else if ($mt{0} == 'F') {
                            $v = (double)$v;
                        }
                        $nArr[] = $this->quoteFieldNames($k) . '=' . ((!in_array($k, $no_quote_fields)) ? $this->fullQuoteStr($v, $table) : $v);
                    }
                }

                if (count($blobfields) || count($clobfields)) {
                    if (count($nArr)) {
                        $query[0] = 'UPDATE '.$this->quoteFromTables($table).'
                        SET
                            '.implode(',
                            ',$nArr).
                            (strlen($where)>0 ? '
                        WHERE
                            '.$this->quoteWhereClause($where) : '');
                    }
                    if (count($blobfields)) $query[1] = $blobfields;
                    if (count($clobfields)) $query[2] = $clobfields;
                    if ($this->debugOutput || $this->store_lastBuiltQuery) $this->debug_lastBuiltQuery = $query[0];
                } else {
                    $query = 'UPDATE '.$this->quoteFromTables($table).'
                    SET
                        '.implode(',
                        ',$nArr).
                        (strlen($where)>0 ? '
                    WHERE
                        '.$this->quoteWhereClause($where) : '');

                        if ($this->debugOutput || $this->store_lastBuiltQuery) $this->debug_lastBuiltQuery = $query;
                }

                return $query;
            }
        } else {
            die('<strong>TYPO3 Fatal Error:</strong> "Where" clause argument for UPDATE query was not a string in $this->UPDATEquery() !');
        }
    }

    /**
     * Creates a DELETE SQL-statement for $table where $where-clause
     * Usage count/core: 3
     *
     * @param   string      See exec_DELETEquery()
     * @param   string      See exec_DELETEquery()
     * @return  string      Full SQL query for DELETE
     */
    public function DELETEquery($table, $where) {
        if (is_string($where)) {
            $table = $this->quoteFromTables($table);
            $where = $this->quoteWhereClause($where);

            $query = parent::DELETEquery($table, $where);

            if ($this->debugOutput || $this->store_lastBuiltQuery) $this->debug_lastBuiltQuery = $query;
            return $query;
        } else {
            die('<strong>TYPO3 Fatal Error:</strong> "Where" clause argument for DELETE query was not a string in $this->DELETEquery() !');
        }
    }

    /**
     * Creates a SELECT SQL-statement
     * Usage count/core: 11
     *
     * @param   string      See exec_SELECTquery()
     * @param   string      See exec_SELECTquery()
     * @param   string      See exec_SELECTquery()
     * @param   string      See exec_SELECTquery()
     * @param   string      See exec_SELECTquery()
     * @param   string      See exec_SELECTquery()
     * @return  string      Full SQL query for SELECT
     */
    public function SELECTquery($select_fields, $from_table, $where_clause, $groupBy = '', $orderBy = '', $limit = '') {
        $select_fields = $this->quoteFieldNames($select_fields);
        $from_table = $this->quoteFromTables($from_table);
        $where_clause = $this->quoteWhereClause($where_clause);
        $groupBy = $this->quoteGroupBy($groupBy);
        $orderBy = $this->quoteOrderBy($orderBy);

            // Call parent method to build actual query
        $query = parent::SELECTquery($select_fields,$from_table,$where_clause,$groupBy,$orderBy,$limit);

        if ($this->debugOutput || $this->store_lastBuiltQuery) $this->debug_lastBuiltQuery = $query;

        return $query;
    }

    /**
     * Creates a TRUNCATE TABLE SQL-statement
     * 
     * @param   string      See exec_TRUNCATEquery()
     * @return  string      Full SQL query for TRUNCATE TABLE
     */
    public function TRUNCATEquery($table) {
        $table = $this->quoteFromTables($table);

            // Call parent method to build actual query
        $query = parent::TRUNCATEquery($table);

        if ($this->debugOutput || $this->store_lastBuiltQuery) {
            $this->debug_lastBuiltQuery = $query;
        }

        return $query;
    }


    /**************************************
    *
    * Functions for quoting table/field names
    *
    **************************************/

    /**
     * Quotes components of a SELECT subquery.
     * 
     * @param array $components Array of SQL query components
     * @return array
     */
    protected function quoteSELECTsubquery(array $components) {
        $components['SELECT'] = $this->_quoteFieldNames($components['SELECT']);
        $components['FROM'] = $this->_quoteFromTables($components['FROM']);
        $components['WHERE'] = $this->_quoteWhereClause($components['WHERE']);
        return $components;
    }

    /**
     * Quotes field (and table) names with the quote character suitable for the DB being used
     * Use quoteFieldNames instead!
     *
     * @param   string      List of fields to be selected from DB
     * @return  string      Quoted list of fields to be selected from DB
     * @deprecated since TYPO3 4.0
     */
    public function quoteSelectFields($select_fields) {
        $this->quoteFieldNames($select_fields);
    }

    /**
     * Quotes field (and table) names with the quote character suitable for the DB being used
     *
     * @param   string      List of fields to be used in query to DB
     * @return  string      Quoted list of fields to be in query to DB
     */
    public function quoteFieldNames($select_fields) {
        if ($select_fields == '') return '';
        if ($this->runningNative()) return $select_fields;

        $select_fields = $this->SQLparser->parseFieldList($select_fields);
        if ($this->SQLparser->parse_error) {
            die($this->SQLparser->parse_error . ' in ' . __FILE__ . ' : ' . __LINE__);
        }
        $select_fields = $this->_quoteFieldNames($select_fields);

        return $this->SQLparser->compileFieldList($select_fields);
    }

    /**
     * Quotes field (and table) names in a SQL SELECT clause acccording to DB rules
     *
     * @param array $select_fields The parsed fields to quote
     * @return array
     * @see quoteFieldNames()
     */
    protected function _quoteFieldNames(array $select_fields) {
        foreach ($select_fields as $k => $v) {
            if ($select_fields[$k]['field'] != '' && $select_fields[$k]['field'] != '*' && !is_numeric($select_fields[$k]['field'])) {
                $select_fields[$k]['field'] = $this->quoteName($select_fields[$k]['field']);
            }
            if ($select_fields[$k]['table'] != '' && !is_numeric($select_fields[$k]['table'])) {
                $select_fields[$k]['table'] = $this->quoteName($select_fields[$k]['table']);
            }
            if ($select_fields[$k]['as'] != '') {
                $select_fields[$k]['as'] = $this->quoteName($select_fields[$k]['as']);
            }
            if (isset($select_fields[$k]['func_content.']) && $select_fields[$k]['func_content.'][0]['func_content'] != '*'){
                $select_fields[$k]['func_content.'][0]['func_content'] = $this->quoteFieldNames($select_fields[$k]['func_content.'][0]['func_content']);
                $select_fields[$k]['func_content'] = $this->quoteFieldNames($select_fields[$k]['func_content']);
            }
            if (isset($select_fields[$k]['flow-control'])) {
                    // Quoting flow-control statements
                if ($select_fields[$k]['flow-control']['type'] === 'CASE') {
                    if (isset($select_fields[$k]['flow-control']['case_field'])) {
                        $select_fields[$k]['flow-control']['case_field'] = $this->quoteFieldNames($select_fields[$k]['flow-control']['case_field']);
                    }
                    foreach ($select_fields[$k]['flow-control']['when'] as $key => $when) {
                        $select_fields[$k]['flow-control']['when'][$key]['when_value'] = $this->_quoteWhereClause($when['when_value']);
                    } 
                }
            }
        }

        return $select_fields;
    }

    /**
     * Quotes table names with the quote character suitable for the DB being used
     *
     * @param   string      List of tables to be selected from DB
     * @return  string      Quoted list of tables to be selected from DB
     */
    public function quoteFromTables($from_table) {
        if ($from_table == '') return '';
        if ($this->runningNative()) return $from_table;

        $from_table = $this->SQLparser->parseFromTables($from_table);
        $from_table = $this->_quoteFromTables($from_table);
        return $this->SQLparser->compileFromTables($from_table);
    }

    /**
     * Quotes table names in a SQL FROM clause acccording to DB rules
     *
     * @param array $from_table The parsed FROM clause to quote
     * @return array
     * @see quoteFromTables()
     */
    protected function _quoteFromTables(array $from_table) {
        foreach ($from_table as $k => $v) {
            $from_table[$k]['table'] = $this->quoteName($from_table[$k]['table']);
            if ($from_table[$k]['as'] != '') {
                $from_table[$k]['as'] = $this->quoteName($from_table[$k]['as']);
            }
            if (is_array($v['JOIN'])) {
                foreach ($v['JOIN'] as $joinCnt => $join) {
                    $from_table[$k]['JOIN'][$joinCnt]['withTable'] = $this->quoteName($join['withTable']);
                    $from_table[$k]['JOIN'][$joinCnt]['as'] = ($join['as']) ? $this->quoteName($join['as']) : '';
                    $from_table[$k]['JOIN'][$joinCnt]['ON'][0]['table'] = ($join['ON'][0]['table']) ? $this->quoteName($join['ON'][0]['table']) : '';
                    $from_table[$k]['JOIN'][$joinCnt]['ON'][0]['field'] = $this->quoteName($join['ON'][0]['field']);
                    $from_table[$k]['JOIN'][$joinCnt]['ON'][1]['table'] = ($join['ON'][1]['table']) ? $this->quoteName($join['ON'][1]['table']) : '';
                    $from_table[$k]['JOIN'][$joinCnt]['ON'][1]['field'] = $this->quoteName($join['ON'][1]['field']);
                }
            }
        }

        return $from_table;
    }

    /**
     * Quotes the field (and table) names within a where clause with the quote character suitable for the DB being used
     *
     * @param   string      A where clause that can e parsed by parseWhereClause
     * @return  string      Usable where clause with quoted field/table names
     */
    public function quoteWhereClause($where_clause) {
        if ($where_clause === '' || $this->runningNative()) return $where_clause;

        $where_clause = $this->SQLparser->parseWhereClause($where_clause);
        if (is_array($where_clause)) {
            $where_clause = $this->_quoteWhereClause($where_clause);
            $where_clause = $this->SQLparser->compileWhereClause($where_clause);
        } else {
            die('Could not parse where clause in ' . __FILE__ . ' : ' . __LINE__);
        }

        return $where_clause;
    }

    /**
     * Quotes field names in a SQL WHERE clause acccording to DB rules
     *
     * @param   array       $where_clause The parsed WHERE clause to quote
     * @return  array
     * @see quoteWhereClause()
     */
    protected function _quoteWhereClause(array $where_clause) {
        foreach ($where_clause as $k => $v) {
                // Look for sublevel:
            if (is_array($where_clause[$k]['sub'])) {
                $where_clause[$k]['sub'] = $this->_quoteWhereClause($where_clause[$k]['sub']);
            } elseif (isset($v['func'])) {
                switch ($where_clause[$k]['func']['type']) {
                    case 'EXISTS':
                        $where_clause[$k]['func']['subquery'] = $this->quoteSELECTsubquery($v['func']['subquery']);
                        break;
                    case 'IFNULL':
                    case 'LOCATE':
                        if ($where_clause[$k]['func']['table'] != '') {
                            $where_clause[$k]['func']['table'] = $this->quoteName($v['func']['table']);
                        }
                        if ($where_clause[$k]['func']['field'] != '') {
                            $where_clause[$k]['func']['field'] = $this->quoteName($v['func']['field']);
                        }
                    break;
                }
            } else {
                if ($where_clause[$k]['table'] != '') {
                    $where_clause[$k]['table'] = $this->quoteName($where_clause[$k]['table']);
                }
                if (!is_numeric($where_clause[$k]['field'])) {
                    $where_clause[$k]['field'] = $this->quoteName($where_clause[$k]['field']);
                }
                if (isset($where_clause[$k]['calc_table'])) {
                    if ($where_clause[$k]['calc_table'] != '') {
                        $where_clause[$k]['calc_table'] = $this->quoteName($where_clause[$k]['calc_table']);
                    }
                    if ($where_clause[$k]['calc_field'] != '') {
                        $where_clause[$k]['calc_field'] = $this->quoteName($where_clause[$k]['calc_field']);
                    }
                }
            }
            if ($where_clause[$k]['comparator']) {
                if (isset($v['value']['operator'])) {
                    foreach ($where_clause[$k]['value']['args'] as $argK => $fieldDef) {
                        $where_clause[$k]['value']['args'][$argK]['table'] = $this->quoteName($fieldDef['table']);
                        $where_clause[$k]['value']['args'][$argK]['field'] = $this->quoteName($fieldDef['field']);
                    }
                } else {
                        // Detecting value type; list or plain:
                    if (t3lib_div::inList('NOTIN,IN', strtoupper(str_replace(array(' ',"\n", "\r", "\t"), '', $where_clause[$k]['comparator'])))) {
                        if (isset($v['subquery'])) {
                            $where_clause[$k]['subquery'] = $this->quoteSELECTsubquery($v['subquery']);
                        }
                    } else {
                        if ((!isset($where_clause[$k]['value'][1]) || $where_clause[$k]['value'][1] == '') && is_string($where_clause[$k]['value'][0]) && strstr($where_clause[$k]['value'][0], '.')) {
                            $where_clause[$k]['value'][0] = $this->quoteFieldNames($where_clause[$k]['value'][0]);
                        }
                    }
                }
            }
        }

        return $where_clause;
    }

    /**
     * [Describe function...]
     *
     * @param   [type]      $$groupBy: ...
     * @return  [type]      ...
     */
    protected function quoteGroupBy($groupBy) {
        if ($groupBy === '') return '';
        if ($this->runningNative()) return $groupBy;

        $groupBy = $this->SQLparser->parseFieldList($groupBy);
        foreach ($groupBy as $k => $v) {
            $groupBy[$k]['field'] = $this->quoteName($groupBy[$k]['field']);
            if ($groupBy[$k]['table'] != '') {
                $groupBy[$k]['table'] = $this->quoteName($groupBy[$k]['table']);
            }
        }
        return $this->SQLparser->compileFieldList($groupBy);
    }

    /**
     * [Describe function...]
     *
     * @param   [type]      $$orderBy: ...
     * @return  [type]      ...
     */
    protected function quoteOrderBy($orderBy) {
        if ($orderBy === '') return '';
        if ($this->runningNative()) return $orderBy;

        $orderBy = $this->SQLparser->parseFieldList($orderBy);
        foreach ($orderBy as $k => $v) {
            $orderBy[$k]['field'] = $this->quoteName($orderBy[$k]['field']);
            if ($orderBy[$k]['table'] != '') {
                $orderBy[$k]['table'] = $this->quoteName($orderBy[$k]['table']);
            }
        }
        return $this->SQLparser->compileFieldList($orderBy);
    }



    /**************************************
    *
    * Various helper functions
    *
    **************************************/

    /**
     * Escaping and quoting values for SQL statements.
     *
     * @param   string      Input string
     * @param   string      Table name for which to quote string. Just enter the table that the field-value is selected from (and any DBAL will look up which handler to use and then how to quote the string!).
     * @return  string      Output string; Wrapped in single quotes and quotes in the string (" / ') and \ will be backslashed (or otherwise based on DBAL handler)
     * @see quoteStr()
     */
    public function fullQuoteStr($str, $table) {
        return '\'' . $this->quoteStr($str, $table) . '\'';
    }

    /**
     * Substitution for PHP function "addslashes()"
     * NOTICE: You must wrap the output of this function in SINGLE QUOTES to be DBAL compatible. Unless you have to apply the single quotes yourself you should rather use ->fullQuoteStr()!
     *
     * @param   string      Input string
     * @param   string      Table name for which to quote string. Just enter the table that the field-value is selected from (and any DBAL will look up which handler to use and then how to quote the string!).
     * @return  string      Output string; Quotes (" / ') and \ will be backslashed (or otherwise based on DBAL handler)
     * @see quoteStr()
     */
    public function quoteStr($str, $table) {
        $this->lastHandlerKey = $this->handler_getFromTableList($table);
        switch ((string)$this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $str = mysql_real_escape_string($str, $this->handlerInstance[$this->lastHandlerKey]['link']);
                break;
            case 'adodb':
                $str = substr($this->handlerInstance[$this->lastHandlerKey]->qstr($str), 1, -1);
                break;
            case 'userdefined':
                $str = $this->handlerInstance[$this->lastHandlerKey]->quoteStr($str);
                break;
            default:
                die('No handler found!!!');
                break;
        }

        return $str;
    }

    /**
     * Quotes an object name (table name, field, ...)
     *
     * @param   string      Object's name
     * @param   string      Handler key
     * @param   boolean     If method NameQuote() is not used, whether to use backticks instead of driver-specific quotes
     * @return  string      Properly-quoted object's name
     */
    public function quoteName($name, $handlerKey = NULL, $useBackticks = FALSE) {
        $handlerKey = $handlerKey ? $handlerKey : $this->lastHandlerKey;
        $useNameQuote = isset($this->handlerCfg[$handlerKey]['config']['useNameQuote']) ? $this->handlerCfg[$handlerKey]['config']['useNameQuote'] : FALSE;
        if ($useNameQuote) {
            return $this->handlerInstance[$handlerKey]->DataDictionary->NameQuote($name);
        } else {
            $quote = $useBackticks ? '`' : $this->handlerInstance[$handlerKey]->nameQuote;
            return $quote . $name . $quote;
        }
    }

    /**
     * Return MetaType for native field type (ADOdb only!)
     *
     * @param   string      native type as reported by admin_get_fields()
     * @param   string      Table name for which query type string. Important for detection of DBMS handler of the query!
     * @return  string      Meta type (currenly ADOdb syntax only, http://phplens.com/lens/adodb/docs-adodb.htm#metatype)
     */
    public function MetaType($type, $table, $max_length = -1) {
        $this->lastHandlerKey = $this->handler_getFromTableList($table);
        $str = '';
        switch ((string)$this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $str = $type;
                break;
            case 'adodb':
                if (in_array($table, $this->cache_fieldType)) {
                    $rs = $this->handlerInstance[$this->lastHandlerKey]->SelectLimit('SELECT * FROM ' . $this->quoteFromTables($table), 1);
                    $str = $rs->MetaType($type, $max_length);
                }
                break;
            case 'userdefined':
                $str = $this->handlerInstance[$this->lastHandlerKey]->MetaType($str,$table,$max_length);
                break;
            default:
                die('No handler found!!!');
                break;
        }

        return $str;
    }


    /**
     * Return MetaType for native MySQL field type
     *
     * @param   string      native type as reported as in mysqldump files
     * @return  string      Meta type (currenly ADOdb syntax only, http://phplens.com/lens/adodb/docs-adodb.htm#metatype)
     */
    public function MySQLMetaType($t) {

        switch (strtoupper($t)) {
            case 'STRING':
            case 'CHAR':
            case 'VARCHAR':
            case 'TINYBLOB':
            case 'TINYTEXT':
            case 'ENUM':
            case 'SET': return 'C';

            case 'TEXT':
            case 'LONGTEXT':
            case 'MEDIUMTEXT': return 'XL';

            case 'IMAGE':
            case 'LONGBLOB':
            case 'BLOB':
            case 'MEDIUMBLOB': return 'B';

            case 'YEAR':
            case 'DATE': return 'D';

            case 'TIME':
            case 'DATETIME':
            case 'TIMESTAMP': return 'T';

            case 'FLOAT':
            case 'DOUBLE': return 'F';

            case 'INT':
            case 'INTEGER':
            case 'TINYINT':
            case 'SMALLINT':
            case 'MEDIUMINT':
            case 'BIGINT': return 'I8'; // we always return I8 to be on the safe side. Under some circumstances the fields are to small otherwise...

            default: return 'N';
        }
    }

    /**
     * Return actual MySQL type for meta field type
     *
     * @param   string      Meta type (currenly ADOdb syntax only, http://phplens.com/lens/adodb/docs-adodb.htm#metatype)
     * @return  string      native type as reported as in mysqldump files, uppercase
     */
    public function MySQLActualType($meta) {
        switch (strtoupper($meta)) {
            case 'C': return 'VARCHAR';
            case 'XL':
            case 'X': return 'LONGTEXT';

            case 'C2': return 'VARCHAR';
            case 'X2': return 'LONGTEXT';

            case 'B': return 'LONGBLOB';

            case 'D': return 'DATE';
            case 'T': return 'DATETIME';
            case 'L': return 'TINYINT';

            case 'I':
            case 'I1':
            case 'I2':
            case 'I4':
            case 'I8': return 'BIGINT'; // we only have I8 in DBAL, see MySQLMetaType()

            case 'F': return 'DOUBLE';
            case 'N': return 'NUMERIC';

            default: return $meta;
        }
    }




    /**************************************
    *
    * SQL wrapper functions (Overriding parent methods)
    * (For use in your applications)
    *
    **************************************/

    /**
     * Returns the error status on the most recent sql() execution (based on $this->lastHandlerKey)
     *
     * @return  string      Handler error strings
     */
    public function sql_error() {
        switch ($this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $output = mysql_error($this->handlerInstance[$this->lastHandlerKey]['link']);
                break;
            case 'adodb':
                $output = $this->handlerInstance[$this->lastHandlerKey]->ErrorMsg();
                break;
            case 'userdefined':
                $output = $this->handlerInstance[$this->lastHandlerKey]->sql_error();
                break;
        }
        return $output;
    }

    /**
     * Returns the error number on the most recent sql() execution (based on $this->lastHandlerKey)
     *
     * @return  int     Handler error number
     */
    public function sql_errno() {
        switch ($this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $output = mysql_errno($this->handlerInstance[$this->lastHandlerKey]['link']);
                break;
            case 'adodb':
                $output = $this->handlerInstance[$this->lastHandlerKey]->ErrorNo();
                break;
            case 'userdefined':
                $output = $this->handlerInstance[$this->lastHandlerKey]->sql_errno();
                break;
        }
        return $output;
    }

    /**
     * Returns the number of selected rows.
     *
     * @param   pointer     Result pointer / DBAL object
     * @return  integer     Number of resulting rows.
     */
    public function sql_num_rows(&$res) {
        if ($res === FALSE) return 0;

        $handlerType = is_object($res) ? $res->TYPO3_DBAL_handlerType : 'native';
        switch ($handlerType) {
            case 'native':
                $output = mysql_num_rows($res);
                break;
            case 'adodb':
                $output = method_exists($res, 'RecordCount') ? $res->RecordCount() : 0;
                break;
            case 'userdefined':
                $output = $res->sql_num_rows();
                break;
        }
        return $output;
    }

    /**
     * Returns an associative array that corresponds to the fetched row, or FALSE if there are no more rows.
     *
     * @param   pointer     MySQL result pointer (of SELECT query) / DBAL object
     * @return  array       Associative array of result row.
     */
    public function sql_fetch_assoc(&$res) {
        $output = array();

        $handlerType = is_object($res) ? $res->TYPO3_DBAL_handlerType : (is_resource($res) ? 'native' : FALSE);
        switch ($handlerType) {
            case 'native':
                $output = mysql_fetch_assoc($res);
                $tableList = $this->resourceIdToTableNameMap[(string)$res]; // Reading list of tables from SELECT query:
                break;
            case 'adodb':
                    // Check if method exists for the current $res object.
                    // If a table exists in TCA but not in the db, a error
                    // occured because $res is not a valid object.
                if (method_exists($res, 'FetchRow')) {
                    $output = $res->FetchRow();
                    $tableList = $res->TYPO3_DBAL_tableList;    // Reading list of tables from SELECT query:

                        // Removing all numeric/integer keys.
                        // A workaround because in ADOdb we would need to know what we want before executing the query...
                    if (is_array($output)) {
                        foreach ($output as $key => $value) {
                            if (is_integer($key)) {
                                unset($output[$key]);
                            }
                            elseif ($value === ' ' && $this->runningADOdbDriver('mssql')) $output[$key] = ''; // MSSQL does not know such thing as an empty string. So it returns one space instead, which we must fix.
                        }
                    }
                }
                break;
            case 'userdefined':
                $output = $res->sql_fetch_assoc();
                $tableList = $res->TYPO3_DBAL_tableList;    // Reading list of tables from SELECT query:
                break;
        }

            // Table/Fieldname mapping:
        if (is_array($output)) {
            if ($tables = $this->map_needMapping($tableList,TRUE)) {
                $output = $this->map_assocArray($output,$tables,1);
            }
        }

            // Return result:
        return $output;
    }

    /**
     * Returns an array that corresponds to the fetched row, or FALSE if there are no more rows.
     * The array contains the values in numerical indices.
     *
     * @param   pointer     MySQL result pointer (of SELECT query) / DBAL object
     * @return  array       Array with result rows.
     */
    public function sql_fetch_row(&$res) {
        $handlerType = is_object($res) ? $res->TYPO3_DBAL_handlerType : 'native';
        switch ($handlerType) {
            case 'native':
                $output = mysql_fetch_row($res);
                break;
            case 'adodb':
                    // Check if method exists for the current $res object.
                    // If a table exists in TCA but not in the db, a error
                    // occured because $res is not a valid object.
                if (method_exists($res, 'FetchRow')) {
                    $output = $res->FetchRow();

                        // Removing all assoc. keys.
                        // A workaround because in ADOdb we would need to know what we want before executing the query...
                    if (is_array($output)) {
                        foreach ($output as $key => $value) {
                            if (!is_integer($key))  unset($output[$key]);
                            elseif ($value === ' ' && $this->runningADOdbDriver('mssql')) $output[$key] = ''; // MSSQL does not know such thing as an empty string. So it returns one space instead, which we must fix.
                        }
                    }
                }
                break;
            case 'userdefined':
                $output = $res->sql_fetch_row();
                break;
        }
        return $output;
    }

    /**
     * Free result memory / unset result object
     *
     * @param   pointer     MySQL result pointer to free / DBAL object
     * @return  boolean     Returns TRUE on success or FALSE on failure.
     */
    public function sql_free_result(&$res) {
        if ($res === FALSE) return FALSE;

        $handlerType = is_object($res) ? $res->TYPO3_DBAL_handlerType : 'native';
        switch ($handlerType) {
            case 'native':
                $output = mysql_free_result($res);
                break;
            case 'adodb':
                if (method_exists($res, 'Close')) {
                    $res->Close();
                    unset($res);
                    $output = TRUE;
                } else {
                    $output = FALSE;
                }
                break;
            case 'userdefined':
                unset($res);
                break;
        }
        return $output;
    }

    /**
     * Get the ID generated from the previous INSERT operation
     *
     * @return  integer     The uid of the last inserted record.
     */
    public function sql_insert_id() {
        switch ($this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $output = mysql_insert_id($this->handlerInstance[$this->lastHandlerKey]['link']);
                break;
            case 'adodb':
                $output = $this->handlerInstance[$this->lastHandlerKey]->last_insert_id;
                break;
            case 'userdefined':
                $output = $this->handlerInstance[$this->lastHandlerKey]->sql_insert_id();
                break;
        }
        return $output;
    }

    /**
     * Returns the number of rows affected by the last INSERT, UPDATE or DELETE query
     *
     * @return  integer     Number of rows affected by last query
     */
    public function sql_affected_rows() {
        switch ($this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $output = mysql_affected_rows();
                break;
            case 'adodb':
                $output = $this->handlerInstance[$this->lastHandlerKey]->Affected_Rows();
                break;
            case 'userdefined':
                $output = $this->handlerInstance[$this->lastHandlerKey]->sql_affected_rows();
                break;
        }
        return $output;
    }

    /**
     * Move internal result pointer
     *
     * @param   pointer     MySQL result pointer (of SELECT query) / DBAL object
     * @param   integer     Seek result number.
     * @return  boolean     Returns TRUE on success or FALSE on failure.
     */
    public function sql_data_seek(&$res, $seek) {
        $handlerType = is_object($res) ? $res->TYPO3_DBAL_handlerType : 'native';
        switch ($handlerType) {
            case 'native':
                $output = mysql_data_seek($res,$seek);
                break;
            case 'adodb':
                $output = $res->Move($seek);
                break;
            case 'userdefined':
                $output = $res->sql_data_seek($seek);
                break;
        }
        return $output;
    }

    /**
     * Get the type of the specified field in a result
     *
     * If the first parameter is a string, it is used as table name for the lookup.
     *
     * @param   pointer     MySQL result pointer (of SELECT query) / DBAL object / table name
     * @param   integer     Field index. In case of ADOdb a string (field name!) FIXME
     * @return  string      Returns the type of the specified field index
     */
    public function sql_field_metatype($table, $field) {
            // If $table and/or $field are mapped, use the original names instead
        foreach ($this->mapping as $tableName => $tableMapInfo) {
            if (isset($tableMapInfo['mapTableName']) && $tableMapInfo['mapTableName'] === $table) {
                    // Table name is mapped => use original name
                $table = $tableName;
            }

            if (isset($tableMapInfo['mapFieldNames'])) {
                foreach ($tableMapInfo['mapFieldNames'] as $fieldName => $fieldMapInfo) {
                    if ($fieldMapInfo === $field) {
                            // Field name is mapped => use original name
                        $field = $fieldName;
                    }
                }
            }
        }

        return $this->cache_fieldType[$table][$field]['metaType'];
    }

    /**
     * Get the type of the specified field in a result
     *
     * If the first parameter is a string, it is used as table name for the lookup.
     *
     * @param   pointer     MySQL result pointer (of SELECT query) / DBAL object / table name
     * @param   integer     Field index. In case of ADOdb a string (field name!) FIXME
     * @return  string      Returns the type of the specified field index
     */
    public function sql_field_type(&$res,$pointer) {
        if ($res === null) {
            debug(array('no res in sql_field_type!'));
            return 'text';
        }
        elseif (is_string($res)){
            if ($res === 'tx_dbal_debuglog') return 'text';
            $handlerType = 'adodb';
        }
        else {
            $handlerType = is_object($res) ? $res->TYPO3_DBAL_handlerType :  'native';
        }

        switch ($handlerType) {
            case 'native':
                $output = mysql_field_type($res,$pointer);
                break;
            case 'adodb':
                if (is_string($pointer)){
                    $output = $this->cache_fieldType[$res][$pointer]['type'];
                }

                break;
            case 'userdefined':
                $output = $res->sql_field_type($pointer);
                break;
        }

        return $output;
    }








    /**********
    *
    * Legacy functions, bound to _DEFAULT handler. (Overriding parent methods)
    * Deprecated or still experimental.
    *
    **********/

    /**
     * Executes query (on DEFAULT handler!)
     * DEPRECATED - use exec_* functions from this class instead!
     *
     * @param   string      Database name
     * @param   string      Query to execute
     * @return  pointer     Result pointer
     * @deprecated since TYPO3 4.1
     */
    public function sql($db,$query) {
        return $this->sql_query($query);
    }

    /**
     * Executes a query
     * EXPERIMENTAL - This method will make its best to handle the query correctly
     * but if it cannot, it will simply pass the query to DEFAULT handler.
     *
     * You should use exec_* function from this class instead!
     * If you don't, anything that does not use the _DEFAULT handler will probably break!
     * 
     * This method was deprecated in TYPO3 4.1 but is considered experimental since TYPO3 4.4
     * as it tries to handle the query correctly anyway.
     *
     * @param   string      Query to execute
     * @return  pointer     Result pointer / DBAL object
     */
    public function sql_query($query) {
            // This method is heavily used by Extbase, try to handle it with DBAL-native methods
        $queryParts = $this->SQLparser->parseSQL($query);
        if (is_array($queryParts) && t3lib_div::inList('SELECT,UPDATE,INSERT,DELETE', $queryParts['type'])) {
            return $this->exec_query($queryParts);
        }

        switch ($this->handlerCfg['_DEFAULT']['type']) {
            case 'native':
                $sqlResult = mysql_query($query, $this->handlerInstance['_DEFAULT']['link']);
                break;
            case 'adodb':
                $sqlResult = $this->handlerInstance['_DEFAULT']->Execute($query);
                $sqlResult->TYPO3_DBAL_handlerType = 'adodb';
                break;
            case 'userdefined':
                $sqlResult = $this->handlerInstance['_DEFAULT']->sql_query($query);
                $sqlResult->TYPO3_DBAL_handlerType = 'userdefined';
                break;
        }

        if ($this->printErrors && $this->sql_error()) {
            debug(array($this->lastQuery, $this->sql_error()));
        }

        return $sqlResult;
    }

    /**
     * Opening the _DEFAULT connection handler to the database.
     * This is typically done by the scripts "init.php" in the backend or "index_ts.php" in the frontend (tslib_fe->connectToMySQL())
     * You wouldn't need to use this at any time - let TYPO3 core handle this.
     *
     * @param   string      Database host IP/domain
     * @param   string      Username to connect with.
     * @param   string      Password to connect with.
     * @return  mixed       Returns handler connection value
     * @deprecated since TYPO3 4.1
     * @see handler_init()
     */
    public function sql_pconnect($TYPO3_db_host, $TYPO3_db_username, $TYPO3_db_password) {
            // Overriding the _DEFAULT handler configuration of username, password, localhost and database name:
        $this->handlerCfg['_DEFAULT']['config']['username'] = $TYPO3_db_username;
        $this->handlerCfg['_DEFAULT']['config']['password'] = $TYPO3_db_password;
        $this->handlerCfg['_DEFAULT']['config']['host'] = $TYPO3_db_host;
        $this->handlerCfg['_DEFAULT']['config']['database'] = TYPO3_db;

            // Initializing and output value:
        $sqlResult = $this->handler_init('_DEFAULT');
        return $sqlResult;
    }

    /**
     * Select database for _DEFAULT handler.
     *
     * @param   string      Database to connect to.
     * @return  boolean     Always returns TRUE; function is obsolete, database selection is made in handler_init() function!
     * @deprecated since TYPO3 4.1
     */
    public function sql_select_db($TYPO3_db) {
        return TRUE;
    }















    /**************************************
    *
    * SQL admin functions
    * (For use in the Install Tool and Extension Manager)
    *
    **************************************/

    /**
     * Listing databases from current MySQL connection. NOTICE: It WILL try to select those databases and thus break selection of current database.
     * Use in Install Tool only!
     * Usage count/core: 1
     *
     * @return  array       Each entry represents a database name
     */
    public function admin_get_dbs() {
        $dbArr = array();
        switch ($this->handlerCfg['_DEFAULT']['type']) {
            case 'native':
                $db_list = mysql_list_dbs($this->link);
                while ($row = mysql_fetch_object($db_list)) {
                    if ($this->sql_select_db($row->Database)) {
                        $dbArr[] = $row->Database;
                    }
                }
                break;
            case 'adodb':
                    // check needed for install tool - otherwise it will just die because the call to
                    // MetaDatabases is done on a stdClass instance
                if (method_exists($this->handlerInstance['_DEFAULT'],'MetaDatabases')) {
                    $sqlDBs = $this->handlerInstance['_DEFAULT']->MetaDatabases();
                    if (is_array($sqlDBs)) {
                        foreach ($sqlDBs as $k => $theDB) {
                            $dbArr[] = $theDB;
                        }
                    }
                }
                break;
            case 'userdefined':
                $dbArr = $this->handlerInstance['_DEFAULT']->admin_get_tables();
                break;
        }

        return $dbArr;
    }

    /**
     * Returns the list of tables from the system (quering the DBMSs)
     * It looks up all tables from the DBMS of the _DEFAULT handler and then add all tables *configured* to be managed by other handlers
     *
     * When fetching the tables, it skips tables whose names begin with BIN$, as this is taken as a table coming from the "Recycle Bin" on Oracle.
     *
     * @return  array       Tables in an array (tablename is in both key and value)
     * @todo    Should the check for Oracle Recycle Bin stuff be moved elsewhere?
     * @todo    Should return table details in value! see t3lib_db::admin_get_tables()
     */
    public function admin_get_tables() {
        $whichTables = array();

            // Getting real list of tables:
        switch ($this->handlerCfg['_DEFAULT']['type']) {
            case 'native':
                $tables_result = mysql_query('SHOW TABLE STATUS FROM `' . TYPO3_db . '`', $this->handlerInstance['_DEFAULT']['link']);
                if (!$this->sql_error()) {
                    while ($theTable = $this->sql_fetch_assoc($tables_result)) {
                        $whichTables[current($theTable)] = current($theTable);
                    }
                }
                break;
            case 'adodb':
                $sqlTables = $this->handlerInstance['_DEFAULT']->MetaTables('TABLES');
                while (list($k, $theTable) = each($sqlTables)) {
                    if (preg_match('/BIN\$/', $theTable)) continue; // skip tables from the Oracle 10 Recycle Bin
                    $whichTables[$theTable] = $theTable;
                }
                break;
            case 'userdefined':
                $whichTables = $this->handlerInstance['_DEFAULT']->admin_get_tables();
                break;
        }

            // Check mapping:
        if (is_array($this->mapping) && count($this->mapping)) {

                // Mapping table names in reverse, first getting list of real table names:
            $tMap = array();
            foreach ($this->mapping as $tN => $tMapInfo) {
                if (isset($tMapInfo['mapTableName']))   $tMap[$tMapInfo['mapTableName']]=$tN;
            }

                // Do mapping:
            $newList=array();
            foreach ($whichTables as $tN) {
                if (isset($tMap[$tN]))  $tN = $tMap[$tN];
                $newList[$tN] = $tN;
            }

            $whichTables = $newList;
        }

            // Adding tables configured to reside in other DBMS (handler by other handlers than the default):
        if (is_array($this->table2handlerKeys)) {
            foreach ($this->table2handlerKeys as $key => $handlerKey) {
                $whichTables[$key] = $key;
            }
        }

        return $whichTables;
    }

    /**
     * Returns information about each field in the $table (quering the DBMS)
     * In a DBAL this should look up the right handler for the table and return compatible information
     * This function is important not only for the Install Tool but probably for DBALs as well since they might need to look up table specific information in order to construct correct queries. In such cases this information should probably be cached for quick delivery
     *
     * @param   string      Table name
     * @return  array       Field information in an associative array with fieldname => field row
     */
    public function admin_get_fields($tableName) {
        $output = array();

            // Do field mapping if needed:
        $ORIG_tableName = $tableName;
        if ($tableArray = $this->map_needMapping($tableName)) {

                // Table name:
            if ($this->mapping[$tableName]['mapTableName']) {
                $tableName = $this->mapping[$tableName]['mapTableName'];
            }
        }

            // Find columns
        $this->lastHandlerKey = $this->handler_getFromTableList($ORIG_tableName);
        switch ((string)$this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $columns_res = mysql_query('SHOW columns FROM '.$tableName, $this->handlerInstance[$this->lastHandlerKey]['link']);
                while($fieldRow = mysql_fetch_assoc($columns_res)) {
                    $output[$fieldRow['Field']] = $fieldRow;
                }
                break;
            case 'adodb':
                $fieldRows = $this->handlerInstance[$this->lastHandlerKey]->MetaColumns($tableName, FALSE);
                if (is_array($fieldRows)) {
                    foreach ($fieldRows as $k => $fieldRow) {
                        settype($fieldRow, 'array');
                        $fieldRow['Field'] = $fieldRow['name'];
                        $ntype = $this->MySQLActualType($this->MetaType($fieldRow['type'],$tableName));
                        $ntype .= (($fieldRow['max_length'] != -1) ? (($ntype == 'INT') ? '(11)' :'('.$fieldRow['max_length'].')') : '');
                        $fieldRow['Type'] = strtolower($ntype);
                        $fieldRow['Null'] = '';
                        $fieldRow['Key'] = '';
                        $fieldRow['Default'] = $fieldRow['default_value'];
                        $fieldRow['Extra'] = '';
                        $output[$fieldRow['name']] = $fieldRow;
                    }
                }
                break;
            case 'userdefined':
                $output = $this->handlerInstance[$this->lastHandlerKey]->admin_get_fields($tableName);
                break;
        }

            // mapping should be done:
        if (is_array($tableArray) && is_array($this->mapping[$ORIG_tableName]['mapFieldNames'])) {
            $revFields = array_flip($this->mapping[$ORIG_tableName]['mapFieldNames']);

            $newOutput = array();
            foreach ($output as $fN => $fInfo) {
                if (isset($revFields[$fN])) {
                    $fN = $revFields[$fN];
                    $fInfo['Field'] = $fN;
                }
                $newOutput[$fN] = $fInfo;
            }
            $output = $newOutput;
        }

        return $output;
    }

    /**
     * Returns information about each index key in the $table (quering the DBMS)
     * In a DBAL this should look up the right handler for the table and return compatible information
     *
     * @param   string      Table name
     * @return  array       Key information in a numeric array
     */
    public function admin_get_keys($tableName) {
        $output = array();

            // Do field mapping if needed:
        $ORIG_tableName = $tableName;
        if ($tableArray = $this->map_needMapping($tableName)) {

                // Table name:
            if ($this->mapping[$tableName]['mapTableName']) {
                $tableName = $this->mapping[$tableName]['mapTableName'];
            }
        }

            // Find columns
        $this->lastHandlerKey = $this->handler_getFromTableList($ORIG_tableName);
        switch ((string)$this->handlerCfg[$this->lastHandlerKey]['type']) {
            case 'native':
                $keyRes = mysql_query('SHOW keys FROM '.$tableName, $this->handlerInstance[$this->lastHandlerKey]['link']);
                while($keyRow = mysql_fetch_assoc($keyRes)) {
                    $output[] = $keyRow;
                }
                break;
            case 'adodb':
                $keyRows = $this->handlerInstance[$this->lastHandlerKey]->MetaIndexes($tableName);
                if ($keyRows !== FALSE) {
                    while (list($k, $theKey) = each($keyRows)) {
                        $theKey['Table'] = $tableName;
                        $theKey['Non_unique'] = (int) !$theKey['unique'];
                        $theKey['Key_name'] = str_replace($tableName.'_','',$k);
    
                            // the following are probably not needed anyway...
                        $theKey['Collation'] = '';
                        $theKey['Cardinality'] = '';
                        $theKey['Sub_part'] = '';
                        $theKey['Packed'] = '';
                        $theKey['Null'] = '';
                        $theKey['Index_type'] = '';
                        $theKey['Comment'] = '';
    
                            // now map multiple fields into multiple rows (we mimic MySQL, remember...)
                        $keycols = $theKey['columns'];
                        while (list($c, $theCol) = each($keycols)) {
                            $theKey['Seq_in_index'] = $c+1;
                            $theKey['Column_name'] = $theCol;
                            $output[] = $theKey;
                        }
                    }
                }
                $priKeyRow = $this->handlerInstance[$this->lastHandlerKey]->MetaPrimaryKeys($tableName);
                $theKey = array();
                $theKey['Table'] = $tableName;
                $theKey['Non_unique'] = 0;
                $theKey['Key_name'] = 'PRIMARY';
    
                    // the following are probably not needed anyway...
                $theKey['Collation'] = '';
                $theKey['Cardinality'] = '';
                $theKey['Sub_part'] = '';
                $theKey['Packed'] = '';
                $theKey['Null'] = '';
                $theKey['Index_type'] = '';
                $theKey['Comment'] = '';
    
                    // now map multiple fields into multiple rows (we mimic MySQL, remember...)
                if ($priKeyRow !== FALSE) {
                    while (list($c, $theCol) = each($priKeyRow)) {
                        $theKey['Seq_in_index'] = $c+1;
                        $theKey['Column_name'] = $theCol;
                        $output[] = $theKey;
                    }
                }
                break;
            case 'userdefined':
                $output = $this->handlerInstance[$this->lastHandlerKey]->admin_get_keys($tableName);
                break;
        }

            // mapping should be done:
        if (is_array($tableArray) && is_array($this->mapping[$ORIG_tableName]['mapFieldNames'])) {
            $revFields = array_flip($this->mapping[$ORIG_tableName]['mapFieldNames']);

            $newOutput = array();
            foreach ($output as $kN => $kInfo) {
                    // Table:
                $kInfo['Table'] = $ORIG_tableName;

                    // Column
                if (isset($revFields[$kInfo['Column_name']])) {
                    $kInfo['Column_name'] = $revFields[$kInfo['Column_name']];
                }

                    // Write it back:
                $newOutput[$kN] = $kInfo;
            }
            $output = $newOutput;
        }

        return $output;
    }

    /**
     * mysql() wrapper function, used by the Install Tool.
     *
     * @return  array
     */
    public function admin_get_charsets() {
        return array();
    }

    /**
     * mysql() wrapper function, used by the Install Tool and EM for all queries regarding management of the database!
     *
     * @param   string      Query to execute
     * @return  pointer     Result pointer
     */
    public function admin_query($query) {
        $parsedQuery = $this->SQLparser->parseSQL($query);
        $ORIG_table = $parsedQuery['TABLE'];

        if (is_array($parsedQuery)) {

                // Process query based on type:
            switch ($parsedQuery['type']) {
                case 'CREATETABLE':
                case 'ALTERTABLE':
                case 'DROPTABLE':
                    if (file_exists(PATH_typo3conf.'temp_fieldInfo.php')) unlink(PATH_typo3conf.'temp_fieldInfo.php');
                    $this->map_genericQueryParsed($parsedQuery);
                    break;
                case 'INSERT':
                case 'TRUNCATETABLE':
                    $this->map_genericQueryParsed($parsedQuery);
                    break;
                case 'CREATEDATABASE':
                    die('Creating a database with DBAL is not supported. Did you really read the manual?');
                    break;
                default:
                    die('ERROR: Invalid Query type ('.$parsedQuery['type'].') for ->admin_query() function!: "'.htmlspecialchars($query).'"');
                    break;
            }

                // Setting query array (for other applications to access if needed)
            $this->lastParsedAndMappedQueryArray = $parsedQuery;

                // Execute query (based on handler derived from the TABLE name which we actually know for once!)
            $this->lastHandlerKey = $this->handler_getFromTableList($ORIG_table);
            switch ((string)$this->handlerCfg[$this->lastHandlerKey]['type']) {
                case 'native':
                        // Compiling query:
                    $compiledQuery =  $this->SQLparser->compileSQL($this->lastParsedAndMappedQueryArray);

                    if ($this->lastParsedAndMappedQueryArray['type']=='INSERT') {
                        return mysql_query($compiledQuery, $this->link);
                    }
                    return mysql_query($compiledQuery[0], $this->link);
                    break;
                case 'adodb':
                        // Compiling query:
                    $compiledQuery =  $this->SQLparser->compileSQL($this->lastParsedAndMappedQueryArray);
                    switch ($this->lastParsedAndMappedQueryArray['type']) {
                        case 'INSERT':
                            return $this->exec_INSERTquery($this->lastParsedAndMappedQueryArray['TABLE'], $compiledQuery);
                        case 'TRUNCATETABLE':
                            return $this->exec_TRUNCATEquery($this->lastParsedAndMappedQueryArray['TABLE']);
                    }
                    return $this->handlerInstance[$this->lastHandlerKey]->DataDictionary->ExecuteSQLArray($compiledQuery);
                    break;
                case 'userdefined':
                        // Compiling query:
                    $compiledQuery =  $this->SQLparser->compileSQL($this->lastParsedAndMappedQueryArray);

                    return $this->handlerInstance[$this->lastHandlerKey]->admin_query($compiledQuery);
                    break;
            }
        } else die('ERROR: Query could not be parsed: "'.htmlspecialchars($parsedQuery).'". Query: "'.htmlspecialchars($query).'"');
    }










    /************************************
    *
    * Handler management
    *
    **************************************/

    /**
     * Return the handler key pointing to an appropriate database handler as found in $this->handlerCfg array
     * Notice: TWO or more tables in the table list MUST use the SAME handler key - otherwise a fatal error is thrown! (Logically, no database can possibly join two tables from separate sources!)
     *
     * @param   string      Table list, eg. "pages" or "pages, tt_content" or "pages AS A, tt_content AS B"
     * @return  string      Handler key (see $this->handlerCfg array) for table
     */
    public function handler_getFromTableList($tableList) {

        $key = $tableList;

        if (!isset($this->cache_handlerKeyFromTableList[$key])) {

                // Get tables separated:
            $_tableList = $tableList;
            $tableArray = $this->SQLparser->parseFromTables($_tableList);

                // If success, traverse the tables:
            if (is_array($tableArray) && count($tableArray)) {
                $outputHandlerKey = '';

                foreach ($tableArray as $vArray) {
                        // Find handler key, select "_DEFAULT" if none is specifically configured:
                    $handlerKey = $this->table2handlerKeys[$vArray['table']] ? $this->table2handlerKeys[$vArray['table']] : '_DEFAULT';

                        // In case of separate handler keys for joined tables:
                    if ($outputHandlerKey && $handlerKey != $outputHandlerKey) {
                        die('DBAL fatal error: Tables in this list "'.$tableList.'" didn\'t use the same DB handler!');
                    }

                    $outputHandlerKey = $handlerKey;
                }

                    // Check initialized state; if handler is NOT initialized (connected) then we will connect it!
                if (!isset($this->handlerInstance[$outputHandlerKey])) {
                    $this->handler_init($outputHandlerKey);
                }

                    // Return handler key:
                $this->cache_handlerKeyFromTableList[$key] = $outputHandlerKey;
            } else {
                die('DBAL fatal error: No handler found in handler_getFromTableList() for: "'.$tableList.'" ('.$tableArray.')');
            }
        }

        return $this->cache_handlerKeyFromTableList[$key];
    }

    /**
     * Initialize handler (connecting to database)
     *
     * @param   string      Handler key
     * @return  boolean     If connection went well, return TRUE
     * @see handler_getFromTableList()
     */
    public function handler_init($handlerKey) {

            // Find handler configuration:
        $cfgArray = $this->handlerCfg[$handlerKey];
        $handlerType = (string)$cfgArray['type'];
        $output = FALSE;

        if (is_array($cfgArray)) {
            switch ($handlerType) {
                case 'native':
                    if ($GLOBALS['TYPO3_CONF_VARS']['SYS']['no_pconnect']) {
                        $link = mysql_connect($cfgArray['config']['host'].(isset($cfgArray['config']['port']) ? ':'.$cfgArray['config']['port'] : ''), $cfgArray['config']['username'], $cfgArray['config']['password'], TRUE);
                    } else {
                        $link = mysql_pconnect($cfgArray['config']['host'].(isset($cfgArray['config']['port']) ? ':'.$cfgArray['config']['port'] : ''), $cfgArray['config']['username'], $cfgArray['config']['password']);
                    }

                        // Set handler instance:
                    $this->handlerInstance[$handlerKey] = array('handlerType' => 'native', 'link' => $link);

                        // If link succeeded:
                    if ($link) {
                            // For default, set ->link (see t3lib_DB)
                        if ($handlerKey == '_DEFAULT') {
                            $this->link = $link;
                        }

                            // Select database as well:
                        if (mysql_select_db($cfgArray['config']['database'], $link)) {
                            $output = TRUE;
                        }
                        $setDBinit = t3lib_div::trimExplode(chr(10), $GLOBALS['TYPO3_CONF_VARS']['SYS']['setDBinit'], 1);
                        foreach ($setDBinit as $v) {
                            if (mysql_query($v, $this->link) === FALSE) {
                                t3lib_div::sysLog('Could not initialize DB connection with query "'.$v.'".','Core',3);
                            }
                        }
                    } else {
                        t3lib_div::sysLog('Could not connect to MySQL server '.$cfgArray['config']['host'].' with user '.$cfgArray['config']['username'].'.','Core',4);
                    }
                    break;
                case 'adodb':
                    $output = TRUE;
                    require_once(t3lib_extMgm::extPath('adodb').'adodb/adodb.inc.php');
                    if (!defined('ADODB_FORCE_NULLS')) define('ADODB_FORCE_NULLS', 1);
                    $GLOBALS['ADODB_FORCE_TYPE'] = ADODB_FORCE_VALUE;
                    $GLOBALS['ADODB_FETCH_MODE'] = ADODB_FETCH_BOTH;

                    $this->handlerInstance[$handlerKey] = &ADONewConnection($cfgArray['config']['driver']);

                        // Set driver-specific options
                    if (isset($cfgArray['config']['driverOptions'])) {
                        foreach ($cfgArray['config']['driverOptions'] as $optionName => $optionValue) {
                            $optionSetterName = 'set' . ucfirst($optionName);
                            if (method_exists($this->handlerInstance[$handlerKey], $optionSetterName)) {
                                $this->handlerInstance[$handlerKey]->$optionSetterName($optionValue);
                            } else {
                                $this->handlerInstance[$handlerKey]->$optionName = $optionValue;
                            }
                        }
                    }

                    if ($GLOBALS['TYPO3_CONF_VARS']['SYS']['no_pconnect']) {
                        $this->handlerInstance[$handlerKey]->Connect($cfgArray['config']['host'].(isset($cfgArray['config']['port']) ? ':'.$cfgArray['config']['port'] : ''),$cfgArray['config']['username'],$cfgArray['config']['password'],$cfgArray['config']['database']);
                    } else {
                        $this->handlerInstance[$handlerKey]->PConnect($cfgArray['config']['host'].(isset($cfgArray['config']['port']) ? ':'.$cfgArray['config']['port'] : ''),$cfgArray['config']['username'],$cfgArray['config']['password'],$cfgArray['config']['database']);
                    }
                    if (!$this->handlerInstance[$handlerKey]->isConnected()) {
                        $dsn = $cfgArray['config']['driver'].'://'.$cfgArray['config']['username'].
                            (strlen($cfgArray['config']['password']) ? ':XXXX@' : '').
                            $cfgArray['config']['host'].(isset($cfgArray['config']['port']) ? ':'.$cfgArray['config']['port'] : '').'/'.$cfgArray['config']['database'].
                            ($GLOBALS['TYPO3_CONF_VARS']['SYS']['no_pconnect'] ? '' : '?persistent=1');
                        t3lib_div::sysLog('Could not connect to DB server using ADOdb on '.$cfgArray['config']['host'].' with user '.$cfgArray['config']['username'].'.','Core',4);
                        error_log('DBAL error: Connection to '.$dsn.' failed. Maybe PHP doesn\'t support the database?');
                        $output = FALSE;
                    } else {
                        $this->handlerInstance[$handlerKey]->DataDictionary  = NewDataDictionary($this->handlerInstance[$handlerKey]);
                        $this->handlerInstance[$handlerKey]->last_insert_id = 0;
                        if (isset($cfgArray['config']['sequenceStart'])) {
                            $this->handlerInstance[$handlerKey]->sequenceStart = $cfgArray['config']['sequenceStart'];
                        } else {
                            $this->handlerInstance[$handlerKey]->sequenceStart = 1;
                        }
                    }
                    break;
                case 'userdefined':
                        // Find class file:
                    $fileName = t3lib_div::getFileAbsFileName($cfgArray['config']['classFile']);
                    if (@is_file($fileName)) {
                        require_once($fileName);
                    } else die('DBAL error: "'.$fileName.'" was not a file to include.');

                        // Initialize:
                    $this->handlerInstance[$handlerKey] = t3lib_div::makeInstance($cfgArray['config']['class']);
                    $this->handlerInstance[$handlerKey]->init($cfgArray,$this);

                    if (is_object($this->handlerInstance[$handlerKey])) {
                        $output = TRUE;
                    }
                    break;
                default:
                    die('ERROR: Invalid handler type: "'.$cfgArray['type'].'"');
                    break;
            }

            return $output;
        } else die('ERROR: No handler for key "'.$handlerKey.'"');
    }


    /**
     * Checks whether the DBAL is currently inside an operation running on the "native" DB handler (i.e. MySQL)
     *
     * @return boolean  True if running on "native" DB handler (i.e. MySQL)
     */
    public function runningNative() {
        return ((string)$this->handlerCfg[$this->lastHandlerKey]['type']==='native');
    }


    /**
     * Checks whether the ADOdb handler is running with a driver that contains the argument
     *
     * @param string    $driver Driver name, matched with strstr().
     * @return boolean  True if running with the given driver
     */
    public function runningADOdbDriver($driver) {
        return strstr($this->handlerCfg[$this->lastHandlerKey]['config']['driver'], $driver);
    }










    /************************************
    *
    * Table/Field mapping
    *
    **************************************/

    /**
     * Checks if mapping is needed for a table(list)
     *
     * @param   string      List of tables in query
     * @param   boolean     If TRUE, it will check only if FIELDs are configured and ignore the mapped table name if any.
     * @return  mixed       Returns an array of table names (parsed version of input table) if mapping is needed, otherwise just FALSE.
     */
    protected function map_needMapping($tableList, $fieldMappingOnly = FALSE) {
        $key = $tableList.'|'.$fieldMappingOnly;
        if (!isset($this->cache_mappingFromTableList[$key])) {
            $this->cache_mappingFromTableList[$key] = FALSE;    // Default:

            $tables = $this->SQLparser->parseFromTables($tableList);
            if (is_array($tables)) {
                foreach ($tables as $tableCfg) {
                    if ($fieldMappingOnly) {
                        if (is_array($this->mapping[$tableCfg['table']]['mapFieldNames'])) {
                            $this->cache_mappingFromTableList[$key] = $tables;
                        } elseif (is_array($tableCfg['JOIN'])) {
                            foreach ($tableCfg['JOIN'] as $join) {
                                if (is_array($this->mapping[$join['withTable']]['mapFieldNames'])) {
                                    $this->cache_mappingFromTableList[$key] = $tables;
                                    break;
                                }
                            }
                        }
                    } else {
                        if (is_array($this->mapping[$tableCfg['table']])) {
                            $this->cache_mappingFromTableList[$key] = $tables;
                        } elseif (is_array($tableCfg['JOIN'])) {
                            foreach ($tableCfg['JOIN'] as $join) {
                                if (is_array($this->mapping[$join['withTable']])) {
                                    $this->cache_mappingFromTableList[$key] = $tables;
                                    break;
                                }
                            }
                        }
                    }
                }
            }
        }

        return $this->cache_mappingFromTableList[$key];
    }

    /**
     * Takes an associated array with field => value pairs and remaps the field names if configured for this table in $this->mapping array.
     * Be careful not to map a field name to another existing fields name (although you can use this to swap fieldnames of course...:-)
     * Observe mapping problems with join-results (more than one table): Joined queries should always prefix the table name to avoid problems with this.
     * Observe that alias fields are not mapped of course (should not be a problem though)
     *
     * @param   array       Input array, associative keys
     * @param   array       Array of tables from the query. Normally just one table; many tables in case of a join. NOTICE: for multiple tables (with joins) there MIGHT occur trouble with fields of the same name in the two tables: This function traverses the mapping information for BOTH tables and applies mapping without checking from which table the field really came!
     * @param   boolean     If TRUE, reverse direction. Default direction is to map an array going INTO the database (thus mapping TYPO3 fieldnames to PHYSICAL field names!)
     * @return  array       Output array, with mapped associative keys.
     */
    protected function map_assocArray($input, $tables, $rev = FALSE) {
            // Traverse tables from query (hopefully only one table):
        foreach ($tables as $tableCfg) {
            if (is_array($this->mapping[$tableCfg['table']]['mapFieldNames'])) {

                    // Get the map (reversed if needed):
                if ($rev) {
                    $theMap = array_flip($this->mapping[$tableCfg['table']]['mapFieldNames']);
                } else {
                    $theMap = $this->mapping[$tableCfg['table']]['mapFieldNames'];
                }

                    // Traverse selected record, map fieldnames:
                $output = array();
                foreach ($input as $fN => $value) {

                        // Set the field name, change it if found in mapping array:
                    if ($theMap[$fN]) {
                        $newKey = $theMap[$fN];
                    } else {
                        $newKey = $fN;
                    }

                        // Set value to fieldname:
                    $output[$newKey] = $value;
                }

                    // When done, override the $input array with the result:
                $input = $output;
            }
        }

            // Return input array (which might have been altered in the mean time)
        return $input;
    }

    /**
     * Remaps table/field names in a SELECT query's parts
     * Notice: All arguments are passed by reference!
     *
     * @param   string      List of fields to select from the table. This is what comes right after "SELECT ...". Required value.
     * @param   string      Table(s) from which to select. This is what comes right after "FROM ...". Require value.
     * @param   string      Where clause. This is what comes right after "WHERE ...". Can be blank.
     * @param   string      Group by field(s)
     * @param   string      Order by field(s)
     * @return  void
     * @see exec_SELECTquery()
     */
    protected function map_remapSELECTQueryParts(&$select_fields, &$from_table, &$where_clause, &$groupBy, &$orderBy) {
            // Tables:
        $tables = $this->SQLparser->parseFromTables($from_table);
        $defaultTable = $tables[0]['table'];
        foreach ($tables as $k => $v) {
            if ($this->mapping[$v['table']]['mapTableName']) {
                $tables[$k]['table'] = $this->mapping[$v['table']]['mapTableName'];
            }
                // Mapping JOINS
            if (is_array($v['JOIN'])) {
                foreach($v['JOIN'] as $joinCnt => $join) {
                        // Mapping withTable of the JOIN
                    if ($this->mapping[$join['withTable']]['mapTableName']) {
                        $tables[$k]['JOIN'][$joinCnt]['withTable'] = $this->mapping[$join['withTable']]['mapTableName'];                    
                    }
                    $onPartsArray = array();
                        // Mapping ON parts of the JOIN
                    if (is_array($join['ON'])) {
                        foreach ($join['ON'] as $onParts) {
                            if (isset($this->mapping[$onParts['table']]['mapFieldNames'][$onParts['field']])) {
                                $onParts['field'] = $this->mapping[$onParts['table']]['mapFieldNames'][$onParts['field']];
                            }
                            if (isset($this->mapping[$onParts['table']]['mapTableName'])) {
                                $onParts['table'] = $this->mapping[$onParts['table']]['mapTableName'];
                            }
                            $onPartsArray[] = $onParts;
                        }
                        $tables[$k]['JOIN'][$joinCnt]['ON'] = $onPartsArray;
                    }
                }
            }
        }
        $from_table = $this->SQLparser->compileFromTables($tables);

            // Where clause:
        $whereParts = $this->SQLparser->parseWhereClause($where_clause);
        $this->map_sqlParts($whereParts,$defaultTable);
        $where_clause = $this->SQLparser->compileWhereClause($whereParts, FALSE);

            // Select fields:
        $expFields = $this->SQLparser->parseFieldList($select_fields);
        $this->map_sqlParts($expFields,$defaultTable);
        $select_fields = $this->SQLparser->compileFieldList($expFields, FALSE, FALSE);

            // Group By fields
        $expFields = $this->SQLparser->parseFieldList($groupBy);
        $this->map_sqlParts($expFields,$defaultTable);
        $groupBy = $this->SQLparser->compileFieldList($expFields);

            // Order By fields
        $expFields = $this->SQLparser->parseFieldList($orderBy);
        $this->map_sqlParts($expFields,$defaultTable);
        $orderBy = $this->SQLparser->compileFieldList($expFields);
    }

    /**
     * Generic mapping of table/field names arrays (as parsed by tx_dbal_sqlengine)
     *
     * @param   array       Array with parsed SQL parts; Takes both fields, tables, where-parts, group and order-by. Passed by reference.
     * @param   string      Default table name to assume if no table is found in $sqlPartArray
     * @return  void
     * @access private
     * @see map_remapSELECTQueryParts()
     */
    protected function map_sqlParts(&$sqlPartArray, $defaultTable) {
            // Traverse sql Part array:
        if (is_array($sqlPartArray)) {
            foreach ($sqlPartArray as $k => $v) {

                if (isset($sqlPartArray[$k]['type'])) {
                    switch ($sqlPartArray[$k]['type']) {
                        case 'flow-control':
                            $temp = array($sqlPartArray[$k]['flow-control']);
                            $this->map_sqlParts($temp, $defaultTable);  // Call recursively!
                            $sqlPartArray[$k]['flow-control'] = $temp[0];
                            break;
                        case 'CASE':
                            if (isset($sqlPartArray[$k]['case_field'])) {
                                $fieldArray = explode('.', $sqlPartArray[$k]['case_field']);
                                if (count($fieldArray) == 1 && is_array($this->mapping[$defaultTable]['mapFieldNames']) && isset($this->mapping[$defaultTable]['mapFieldNames'][$fieldArray[0]])) {
                                    $sqlPartArray[$k]['case_field'] = $this->mapping[$defaultTable]['mapFieldNames'][$fieldArray[0]];
                                }
                                elseif (count($fieldArray) == 2) {
                                        // Map the external table
                                    $table = $fieldArray[0];
                                    if (isset($this->mapping[$fieldArray[0]]['mapTableName'])) {
                                        $table = $this->mapping[$fieldArray[0]]['mapTableName'];
                                    }
                                        // Map the field itself
                                    $field = $fieldArray[1];
                                    if (is_array($this->mapping[$fieldArray[0]]['mapFieldNames']) && isset($this->mapping[$fieldArray[0]]['mapFieldNames'][$fieldArray[1]])) {
                                        $field = $this->mapping[$fieldArray[0]]['mapFieldNames'][$fieldArray[1]];
                                    }
                                    $sqlPartArray[$k]['case_field'] = $table . '.' . $field;
                                }
                            }
                            foreach ($sqlPartArray[$k]['when'] as $key => $when) {
                                $this->map_sqlParts($sqlPartArray[$k]['when'][$key]['when_value'], $defaultTable);
                            }
                            break;
                    }
                }

                    // Look for sublevel (WHERE parts only)
                if (is_array($sqlPartArray[$k]['sub'])) {
                    $this->map_sqlParts($sqlPartArray[$k]['sub'], $defaultTable);   // Call recursively!
                } elseif (isset($sqlPartArray[$k]['func'])) {
                    switch ($sqlPartArray[$k]['func']['type']) {
                        case 'EXISTS':
                            $subqueryDefaultTable = $sqlPartArray[$k]['func']['subquery']['FROM'][0]['table'];
                            $this->map_sqlParts($sqlPartArray[$k]['func']['subquery']['SELECT'], $subqueryDefaultTable);
                            $this->map_sqlParts($sqlPartArray[$k]['func']['subquery']['FROM'], $subqueryDefaultTable);
                            $this->map_sqlParts($sqlPartArray[$k]['func']['subquery']['WHERE'], $subqueryDefaultTable);
                            break;
                        case 'IFNULL':
                        case 'LOCATE':
                                // For the field, look for table mapping (generic):
                            $t = $sqlPartArray[$k]['func']['table'] ? $sqlPartArray[$k]['func']['table'] : $defaultTable;
                            if (is_array($this->mapping[$t]['mapFieldNames']) && $this->mapping[$t]['mapFieldNames'][$sqlPartArray[$k]['func']['field']]) {
                                $sqlPartArray[$k]['func']['field'] = $this->mapping[$t]['mapFieldNames'][$sqlPartArray[$k]['func']['field']];
                            }
                            if ($this->mapping[$t]['mapTableName']) {
                                $sqlPartArray[$k]['func']['table'] = $this->mapping[$t]['mapTableName'];
                            }
                            break;
                    }
                } else {
                        // For the field, look for table mapping (generic):
                    $t = $sqlPartArray[$k]['table'] ? $sqlPartArray[$k]['table'] : $defaultTable;

                        // Mapping field name, if set:
                    if (is_array($this->mapping[$t]['mapFieldNames']) && isset($this->mapping[$t]['mapFieldNames'][$sqlPartArray[$k]['field']])) {
                        $sqlPartArray[$k]['field'] = $this->mapping[$t]['mapFieldNames'][$sqlPartArray[$k]['field']];
                    }

                        // Mapping field name in SQL-functions like MIN(), MAX() or SUM()
                    if ($this->mapping[$t]['mapFieldNames']) {
                        $fieldArray = explode('.', $sqlPartArray[$k]['func_content']);
                        if (count($fieldArray) == 1 && is_array($this->mapping[$t]['mapFieldNames']) && isset($this->mapping[$t]['mapFieldNames'][$fieldArray[0]])) {
                            $sqlPartArray[$k]['func_content.'][0]['func_content'] = $this->mapping[$t]['mapFieldNames'][$fieldArray[0]];
                            $sqlPartArray[$k]['func_content'] = $this->mapping[$t]['mapFieldNames'][$fieldArray[0]];
                        }
                        elseif (count($fieldArray) == 2) {
                                // Map the external table
                            $table = $fieldArray[0];
                            if (isset($this->mapping[$fieldArray[0]]['mapTableName'])) {
                                $table = $this->mapping[$fieldArray[0]]['mapTableName'];
                            }
                                // Map the field itself
                            $field = $fieldArray[1];
                            if (is_array($this->mapping[$fieldArray[0]]['mapFieldNames']) && isset($this->mapping[$fieldArray[0]]['mapFieldNames'][$fieldArray[1]])) {
                                $field = $this->mapping[$fieldArray[0]]['mapFieldNames'][$fieldArray[1]];
                            }
                            $sqlPartArray[$k]['func_content.'][0]['func_content'] = $table . '.' . $field;
                            $sqlPartArray[$k]['func_content'] = $table . '.' . $field;
                        }

                            // Mapping flow-control statements
                        if (isset($sqlPartArray[$k]['flow-control'])) {                         
                            if (isset($sqlPartArray[$k]['flow-control']['type'])) {
                                $temp = array($sqlPartArray[$k]['flow-control']);
                                $this->map_sqlParts($temp, $t); // Call recursively!
                                $sqlPartArray[$k]['flow-control'] = $temp[0];
                            }
                        }
                    }

                        // Do we have a function (e.g., CONCAT)
                    if (isset($v['value']['operator'])) {
                        foreach ($sqlPartArray[$k]['value']['args'] as $argK => $fieldDef) {
                            if (isset($this->mapping[$fieldDef['table']]['mapTableName'])) {
                                $sqlPartArray[$k]['value']['args'][$argK]['table'] = $this->mapping[$fieldDef['table']]['mapTableName'];
                            }
                            if (is_array($this->mapping[$fieldDef['table']]['mapFieldNames']) && isset($this->mapping[$fieldDef['table']]['mapFieldNames'][$fieldDef['field']])) {
                                $sqlPartArray[$k]['value']['args'][$argK]['field'] = $this->mapping[$fieldDef['table']]['mapFieldNames'][$fieldDef['field']];   
                            }
                        }
                    }

                        // Do we have a subquery (WHERE parts only)?
                    if (isset($sqlPartArray[$k]['subquery'])) {
                        $subqueryDefaultTable = $sqlPartArray[$k]['subquery']['FROM'][0]['table'];
                        $this->map_sqlParts($sqlPartArray[$k]['subquery']['SELECT'], $subqueryDefaultTable);
                        $this->map_sqlParts($sqlPartArray[$k]['subquery']['FROM'], $subqueryDefaultTable);
                        $this->map_sqlParts($sqlPartArray[$k]['subquery']['WHERE'], $subqueryDefaultTable);
                    }

                        // do we have a field name in the value?
                        // this is a very simplistic check, beware
                    if (!is_numeric($sqlPartArray[$k]['value'][0]) && !isset($sqlPartArray[$k]['value'][1])) {
                        $fieldArray = explode('.', $sqlPartArray[$k]['value'][0]);
                        if (count($fieldArray) == 1 && is_array($this->mapping[$t]['mapFieldNames']) && isset($this->mapping[$t]['mapFieldNames'][$fieldArray[0]])) {
                            $sqlPartArray[$k]['value'][0] = $this->mapping[$t]['mapFieldNames'][$fieldArray[0]];
                        } elseif (count($fieldArray) == 2) {
                                // Map the external table
                            $table = $fieldArray[0];
                            if (isset($this->mapping[$fieldArray[0]]['mapTableName'])) {
                                $table = $this->mapping[$fieldArray[0]]['mapTableName'];
                            }
                                // Map the field itself
                            $field = $fieldArray[1];
                            if (is_array($this->mapping[$fieldArray[0]]['mapFieldNames']) && isset($this->mapping[$fieldArray[0]]['mapFieldNames'][$fieldArray[1]])) {
                                $field = $this->mapping[$fieldArray[0]]['mapFieldNames'][$fieldArray[1]];
                            }
                            $sqlPartArray[$k]['value'][0] = $table . '.' . $field;
                        }
                    }

                        // Map table?
                    if ($sqlPartArray[$k]['table'] && $this->mapping[$sqlPartArray[$k]['table']]['mapTableName']) {
                        $sqlPartArray[$k]['table'] = $this->mapping[$sqlPartArray[$k]['table']]['mapTableName'];
                    }
                }
            }
        }
    }

    /**
     * Will do table/field mapping on a general tx_dbal_sqlengine-compliant SQL query
     * (May still not support all query types...)
     *
     * @param   array       Parsed QUERY as from tx_dbal_sqlengine::parseSQL(). NOTICE: Passed by reference!
     * @return  void
     * @see tx_dbal_sqlengine::parseSQL()
     */
    protected function map_genericQueryParsed(&$parsedQuery) {

            // Getting table - same for all:
        $table = $parsedQuery['TABLE'];
        if ($table) {
                // Do field mapping if needed:
            if ($tableArray = $this->map_needMapping($table)) {

                    // Table name:
                if ($this->mapping[$table]['mapTableName']) {
                    $parsedQuery['TABLE'] = $this->mapping[$table]['mapTableName'];
                }

                    // Based on type, do additional changes:
                switch ($parsedQuery['type']) {
                    case 'ALTERTABLE':

                        // Changing field name:
                    $newFieldName = $this->mapping[$table]['mapFieldNames'][$parsedQuery['FIELD']];
                    if ($newFieldName) {
                        if ($parsedQuery['FIELD'] == $parsedQuery['newField']) {
                            $parsedQuery['FIELD'] = $parsedQuery['newField'] = $newFieldName;
                        } else $parsedQuery['FIELD'] = $newFieldName;
                    }

                        // Changing key field names:
                    if (is_array($parsedQuery['fields'])) {
                        $this->map_fieldNamesInArray($table,$parsedQuery['fields']);
                    }
                    break;
                    case 'CREATETABLE':
                        // Remapping fields:
                    if (is_array($parsedQuery['FIELDS'])) {
                        $newFieldsArray = array();
                        foreach ($parsedQuery['FIELDS'] as $fN => $fInfo) {
                            if ($this->mapping[$table]['mapFieldNames'][$fN]) {
                                $fN = $this->mapping[$table]['mapFieldNames'][$fN];
                            }
                            $newFieldsArray[$fN] = $fInfo;
                        }
                        $parsedQuery['FIELDS'] = $newFieldsArray;
                    }

                        // Remapping keys:
                    if (is_array($parsedQuery['KEYS'])) {
                        foreach ($parsedQuery['KEYS'] as $kN => $kInfo) {
                            $this->map_fieldNamesInArray($table,$parsedQuery['KEYS'][$kN]);
                        }
                    }
                    break;

                    /// ... and here support for all other query types should be!

                }
            }
        } else die('ERROR, mapping: No table found in parsed Query array...');
    }

    /**
     * Re-mapping field names in array
     *
     * @param   string      (TYPO3) Table name for fields.
     * @param   array       Array of fieldnames to remap. Notice: Passed by reference!
     * @return  void
     */
    protected function map_fieldNamesInArray($table,&$fieldArray) {
        if (is_array($this->mapping[$table]['mapFieldNames'])) {
            foreach ($fieldArray as $k => $v) {
                if ($this->mapping[$table]['mapFieldNames'][$v]) {
                    $fieldArray[$k] = $this->mapping[$table]['mapFieldNames'][$v];
                }
            }
        }
    }

















    /**************************************
    *
    * Debugging
    *
    **************************************/

    /**
     * Debug handler for query execution
     *
     * @param   string      Function name from which this function is called.
     * @param   string      Execution time in ms of the query
     * @param   array       In-data of various kinds.
     * @return  void
     * @access private
     */
    public function debugHandler($function,$execTime,$inData) {
            // we don't want to log our own log/debug SQL
        $script = substr(PATH_thisScript,strlen(PATH_site));

        if (substr($script,-strlen('dbal/mod1/index.php'))!='dbal/mod1/index.php' && !strstr($inData['args'][0], 'tx_dbal_debuglog')) {
            $data = array();
            $errorFlag = 0;
            $joinTable = '';

            if ($this->sql_error()) {
                $data['sqlError'] = $this->sql_error();
                $errorFlag|=1;
            }

                // if lastQuery is empty (for whatever reason) at least log inData.args
            if (empty($this->lastQuery))
                $query = implode(' ',$inData['args']);
            else
                $query = $this->lastQuery;

            if ($this->conf['debugOptions']['backtrace']) {
                $backtrace = debug_backtrace();
                unset($backtrace[0]); // skip this very method :)
                $data['backtrace'] = array_slice($backtrace, 0, $this->conf['debugOptions']['backtrace']);
            }

            switch ($function) {
                case 'exec_INSERTquery':
                case 'exec_UPDATEquery':
                case 'exec_DELETEquery':
                    $this->debug_log($query,$execTime,$data,$joinTable,$errorFlag, $script);
                    break;

                case 'exec_SELECTquery':
                        // Get explain data:
                    if ($this->conf['debugOptions']['EXPLAIN'] && t3lib_div::inList('adodb,native',$inData['handlerType'])) {
                        $data['EXPLAIN'] = $this->debug_explain($this->lastQuery);
                    }

                        // Check parsing of Query:
                    if ($this->conf['debugOptions']['parseQuery']) {
                        $parseResults = array();
                        $parseResults['SELECT'] = $this->SQLparser->debug_parseSQLpart('SELECT',$inData['args'][1]);
                        $parseResults['FROM'] = $this->SQLparser->debug_parseSQLpart('FROM',$inData['args'][0]);
                        $parseResults['WHERE'] = $this->SQLparser->debug_parseSQLpart('WHERE',$inData['args'][2]);
                        $parseResults['GROUPBY'] = $this->SQLparser->debug_parseSQLpart('SELECT',$inData['args'][3]);   // Using select field list syntax
                        $parseResults['ORDERBY'] = $this->SQLparser->debug_parseSQLpart('SELECT',$inData['args'][4]);   // Using select field list syntax

                        foreach ($parseResults as $k => $v) {
                            if (!strlen($parseResults[$k])) unset($parseResults[$k]);
                        }
                        if (count($parseResults)) {
                            $data['parseError'] = $parseResults;
                            $errorFlag|=2;
                        }
                    }

                        // Checking joinTables:
                    if ($this->conf['debugOptions']['joinTables']) {
                        if (count(explode(',', $inData['ORIG_from_table']))>1) {
                            $joinTable = $inData['args'][0];
                        }
                    }

                        // Logging it:
                    $this->debug_log($query,$execTime,$data,$joinTable,$errorFlag, $script);
                    if (!empty($inData['args'][2]))
                        $this->debug_WHERE($inData['args'][0], $inData['args'][2], $script);
                    break;
            }
        }
    }

    /**
     * Logs the where clause for debugging purposes.
     *
     * @param string $table Table name(s) the query was targeted at
     * @param string $where The WHERE clause to be logged
     * @param string $script    The script calling the logging
     * @return void
     */
    public function debug_WHERE($table, $where, $script = '') {
        $insertArray = array (
            'tstamp' => $GLOBALS['EXEC_TIME'],
            'beuser_id' => intval($GLOBALS['BE_USER']->user['uid']),
            'script' => $script,
            'tablename' => $table,
            'whereclause' => $where
        );

        $this->exec_INSERTquery('tx_dbal_debuglog_where', $insertArray);
    }

    /**
     * Inserts row in the log table
     *
     * @param   string      The current query
     * @param   integer     Execution time of query in milliseconds
     * @param   array       Data to be stored serialized.
     * @param   string      Join string if there IS a join.
     * @param   integer     Error status.
     * @param string $script    The script calling the logging
     * @return  void
     */
    public function debug_log($query,$ms,$data,$join,$errorFlag, $script='') {
        if (is_array($query)) {
            $queryToLog = $query[0].' --  ';
            if (count($query[1])) {
                $queryToLog .= count($query[1]).' BLOB FIELDS: '.implode(', ',array_keys($query[1]));
            }
            if (count($query[2])) {
                $queryToLog .= count($query[2]).' CLOB FIELDS: '.implode(', ',array_keys($query[2]));
            }
        } else {
            $queryToLog = $query;
        }
        $insertArray = array (
            'tstamp' => $GLOBALS['EXEC_TIME'],
            'beuser_id' => intval($GLOBALS['BE_USER']->user['uid']),
            'script' => $script,
            'exec_time' => $ms,
            'table_join' => $join,
            'serdata' => serialize($data),
            'query' => $queryToLog,
            'errorFlag' => $errorFlag
        );

        $this->exec_INSERTquery('tx_dbal_debuglog', $insertArray);
    }

    /**
     * Perform EXPLAIN query on DEFAULT handler!
     *
     * @param   string      SELECT Query
     * @return  array       The Explain result rows in an array
     * @todo    Not supporting other than the default handler? And what about DBMS of other kinds than MySQL - support for EXPLAIN?
     */
    public function debug_explain($query) {
        $output = array();
        $hType = (string)$this->handlerCfg[$this->lastHandlerKey]['type'];
        switch ($hType) {
            case 'native':
                $res = $this->sql_query('EXPLAIN '.$query);
                while($row = $this->sql_fetch_assoc($res)) {
                    $output[] = $row;
                }
                break;
            case 'adodb':
                switch ($this->handlerCfg['_DEFAULT']['config']['driver']) {
                    case 'oci8':
                        $res = $this->sql_query('EXPLAIN PLAN '.$query);
                        $output[] = 'EXPLAIN PLAN data logged to default PLAN_TABLE';
                        break;
                    default:
                        $res = $this->sql_query('EXPLAIN '.$query);
                        while($row = $this->sql_fetch_assoc($res)) {
                            $output[] = $row;
                        }
                        break;
                }
            break;
        }

        return $output;
    }
}


if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['ext/dbal/class.ux_t3lib_db.php']) {
    include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['ext/dbal/class.ux_t3lib_db.php']);
}

?>

---