<?php
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// vim: set et ts=4 sw=4 fdm=marker:
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// +----------------------------------------------------------------------+
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// | PHP versions 4 and 5 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
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// | Stig. S. Bakken, Lukas Smith |
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// | All rights reserved. |
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// +----------------------------------------------------------------------+
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// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
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// | API as well as database abstraction for PHP applications. |
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// | This LICENSE is in the BSD license style. |
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// | |
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// | Redistribution and use in source and binary forms, with or without |
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// | modification, are permitted provided that the following conditions |
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// | are met: |
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// | |
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// | Redistributions of source code must retain the above copyright |
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// | notice, this list of conditions and the following disclaimer. |
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// | |
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// | Redistributions in binary form must reproduce the above copyright |
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// | notice, this list of conditions and the following disclaimer in the |
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// | documentation and/or other materials provided with the distribution. |
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// | |
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// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
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// | Lukas Smith nor the names of his contributors may be used to endorse |
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// | or promote products derived from this software without specific prior|
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// | written permission. |
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// | |
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// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
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// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
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// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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// | POSSIBILITY OF SUCH DAMAGE. |
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// +----------------------------------------------------------------------+
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// | Author: Lukas Smith <smith@pooteeweet.org> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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//
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/**
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* MDB2 MySQL driver
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*
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* @package MDB2
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* @category Database
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* @author Lukas Smith <smith@pooteeweet.org>
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*/
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class MDB2_Driver_mysql extends MDB2_Driver_Common
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{
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// {{{ properties
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var $escape_quotes = "\\";
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// }}}
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// {{{ constructor
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/**
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* Constructor
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*/
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function __construct()
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{
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parent::__construct();
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$this->phptype = 'mysql';
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$this->dbsyntax = 'mysql';
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$this->supported['sequences'] = 'emulated';
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$this->supported['indexes'] = true;
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$this->supported['affected_rows'] = true;
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$this->supported['transactions'] = false;
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$this->supported['summary_functions'] = true;
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$this->supported['order_by_text'] = true;
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$this->supported['current_id'] = 'emulated';
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$this->supported['limit_queries'] = true;
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$this->supported['LOBs'] = true;
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$this->supported['replace'] = true;
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$this->supported['sub_selects'] = 'emulated';
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$this->supported['auto_increment'] = true;
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$this->supported['primary_key'] = true;
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$this->options['default_table_type'] = null;
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}
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// }}}
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// {{{ errorInfo()
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/**
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* This method is used to collect information about an error
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*
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* @param integer $error
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* @return array
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* @access public
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*/
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function errorInfo($error = null)
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{
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if ($this->connection) {
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$native_code = @mysql_errno($this->connection);
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$native_msg = @mysql_error($this->connection);
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} else {
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$native_code = @mysql_errno();
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$native_msg = @mysql_error();
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}
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if (is_null($error)) {
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static $ecode_map;
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if (empty($ecode_map)) {
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$ecode_map = array(
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1004 => MDB2_ERROR_CANNOT_CREATE,
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1005 => MDB2_ERROR_CANNOT_CREATE,
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1006 => MDB2_ERROR_CANNOT_CREATE,
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1007 => MDB2_ERROR_ALREADY_EXISTS,
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1008 => MDB2_ERROR_CANNOT_DROP,
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1022 => MDB2_ERROR_ALREADY_EXISTS,
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1044 => MDB2_ERROR_ACCESS_VIOLATION,
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1046 => MDB2_ERROR_NODBSELECTED,
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1048 => MDB2_ERROR_CONSTRAINT,
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1049 => MDB2_ERROR_NOSUCHDB,
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1050 => MDB2_ERROR_ALREADY_EXISTS,
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1051 => MDB2_ERROR_NOSUCHTABLE,
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1054 => MDB2_ERROR_NOSUCHFIELD,
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1061 => MDB2_ERROR_ALREADY_EXISTS,
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1062 => MDB2_ERROR_ALREADY_EXISTS,
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1064 => MDB2_ERROR_SYNTAX,
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1091 => MDB2_ERROR_NOT_FOUND,
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1100 => MDB2_ERROR_NOT_LOCKED,
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1136 => MDB2_ERROR_VALUE_COUNT_ON_ROW,
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1142 => MDB2_ERROR_ACCESS_VIOLATION,
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1146 => MDB2_ERROR_NOSUCHTABLE,
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1216 => MDB2_ERROR_CONSTRAINT,
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1217 => MDB2_ERROR_CONSTRAINT,
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);
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}
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if ($this->options['portability'] & MDB2_PORTABILITY_ERRORS) {
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$ecode_map[1022] = MDB2_ERROR_CONSTRAINT;
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$ecode_map[1048] = MDB2_ERROR_CONSTRAINT_NOT_NULL;
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$ecode_map[1062] = MDB2_ERROR_CONSTRAINT;
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} else {
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// Doing this in case mode changes during runtime.
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$ecode_map[1022] = MDB2_ERROR_ALREADY_EXISTS;
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$ecode_map[1048] = MDB2_ERROR_CONSTRAINT;
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$ecode_map[1062] = MDB2_ERROR_ALREADY_EXISTS;
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}
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if (isset($ecode_map[$native_code])) {
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$error = $ecode_map[$native_code];
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}
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}
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return array($error, $native_code, $native_msg);
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}
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// }}}
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// {{{ escape()
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/**
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* Quotes a string so it can be safely used in a query. It will quote
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* the text so it can safely be used within a query.
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*
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* @param string $text the input string to quote
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* @return string quoted string
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* @access public
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*/
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function escape($text)
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{
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return @mysql_real_escape_string($text);
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}
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// }}}
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// {{{ quoteIdentifier()
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/**
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* Quote a string so it can be safely used as a table or column name
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*
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* Quoting style depends on which database driver is being used.
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*
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* MySQL can't handle the backtick character (<kbd>`</kbd>) in
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* table or column names.
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*
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* @param string $str identifier name to be quoted
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*
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* @return string quoted identifier string
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*
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* @access public
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* @internal
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*/
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function quoteIdentifier($str)
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{
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return '`' . $str . '`';
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}
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// }}}
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// {{{ beginTransaction()
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/**
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* Start a transaction.
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function beginTransaction()
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{
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$this->debug('starting transaction', 'beginTransaction');
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if (!$this->supports('transactions')) {
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return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
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'beginTransaction: transactions are not in use');
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}
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if ($this->in_transaction) {
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return MDB2_OK; //nothing to do
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}
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if (!$this->destructor_registered && $this->opened_persistent) {
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$this->destructor_registered = true;
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register_shutdown_function('MDB2_closeOpenTransactions');
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}
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$result = $this->_doQuery('SET AUTOCOMMIT = 0', true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$this->in_transaction = true;
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return MDB2_OK;
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}
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// }}}
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// {{{ commit()
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/**
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* Commit the database changes done during a transaction that is in
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* progress.
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function commit()
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{
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$this->debug('commit transaction', 'commit');
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if (!$this->supports('transactions')) {
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return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
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'commit: transactions are not in use');
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}
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if (!$this->in_transaction) {
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return $this->raiseError(MDB2_ERROR, null, null,
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'commit: transaction changes are being auto committed');
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}
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$result = $this->_doQuery('COMMIT', true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$result = $this->_doQuery('SET AUTOCOMMIT = 1', true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$this->in_transaction = false;
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return MDB2_OK;
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}
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// }}}
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// {{{ rollback()
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/**
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* Cancel any database changes done during a transaction that is in
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* progress.
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function rollback()
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{
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$this->debug('rolling back transaction', 'rollback');
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if (!$this->supports('transactions')) {
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return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
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'rollback: transactions are not in use');
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}
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if (!$this->in_transaction) {
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return $this->raiseError(MDB2_ERROR, null, null,
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'rollback: transactions can not be rolled back when changes are auto committed');
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}
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$result = $this->_doQuery('ROLLBACK', true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$result = $this->_doQuery('SET AUTOCOMMIT = 1', true);
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if (PEAR::isError($result)) {
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return $result;
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}
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$this->in_transaction = false;
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return MDB2_OK;
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}
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// }}}
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// {{{ connect()
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/**
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* Connect to the database
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*
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* @return true on success, MDB2 Error Object on failure
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*/
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function connect()
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{
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if (is_resource($this->connection)) {
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if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
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&& $this->opened_persistent == $this->options['persistent']
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) {
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return MDB2_OK;
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}
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$this->disconnect(false);
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}
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if (!PEAR::loadExtension($this->phptype)) {
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return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
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'connect: extension '.$this->phptype.' is not compiled into PHP');
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}
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$params = array();
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if ($this->dsn['protocol'] && $this->dsn['protocol'] == 'unix') {
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$params[0] = ':' . $this->dsn['socket'];
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} else {
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$params[0] = $this->dsn['hostspec'] ? $this->dsn['hostspec']
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: 'localhost';
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if ($this->dsn['port']) {
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$params[0].= ':' . $this->dsn['port'];
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}
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}
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$params[] = $this->dsn['username'] ? $this->dsn['username'] : null;
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$params[] = $this->dsn['password'] ? $this->dsn['password'] : null;
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if (!$this->options['persistent']) {
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if (isset($this->dsn['new_link'])
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&& ($this->dsn['new_link'] == 'true' || $this->dsn['new_link'] === true)
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) {
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$params[] = true;
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} else {
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$params[] = false;
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}
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}
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if (version_compare(phpversion(), '4.3.0', '>=')) {
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$params[] = isset($this->dsn['client_flags'])
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? $this->dsn['client_flags'] : null;
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}
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$connect_function = $this->options['persistent'] ? 'mysql_pconnect' : 'mysql_connect';
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@ini_set('track_errors', true);
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$php_errormsg = '';
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$connection = @call_user_func_array($connect_function, $params);
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@ini_restore('track_errors');
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if (!$connection) {
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if (($err = @mysql_error()) != '') {
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return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null, $err);
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} else {
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return $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null, $php_errormsg);
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}
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}
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$this->connection = $connection;
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$this->connected_dsn = $this->dsn;
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$this->connected_database_name = '';
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$this->opened_persistent = $this->options['persistent'];
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$this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
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$this->supported['transactions'] = false;
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if ($this->options['default_table_type']) {
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switch (strtoupper($this->options['default_table_type'])) {
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case 'BERKELEYDB':
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$this->options['default_table_type'] = 'BDB';
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case 'BDB':
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case 'INNODB':
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case 'GEMINI':
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$this->supported['transactions'] = true;
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break;
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case 'HEAP':
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case 'ISAM':
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case 'MERGE':
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case 'MRG_MYISAM':
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case 'MYISAM':
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break;
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default:
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$this->warnings[] = $default_table_type.
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' is not a supported default table type';
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}
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}
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if ($this->options['use_transactions'] && !$this->supports('transactions')) {
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$this->warnings[] = $this->options['default_table_type'].
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' is not a transaction-safe default table type; switched to INNODB';
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$this->options['default_table_type'] = 'INNODB';
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$this->supported['transactions'] = true;
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}
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return MDB2_OK;
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}
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// }}}
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// {{{ disconnect()
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/**
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* Log out and disconnect from the database.
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*
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* @return mixed true on success, false if not connected and error
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* object on error
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* @access public
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*/
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function disconnect($force = true)
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{
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if (is_resource($this->connection)) {
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if (!$this->opened_persistent || $force) {
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@mysql_close($this->connection);
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}
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$this->connection = 0;
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}
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return MDB2_OK;
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}
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// }}}
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// {{{ _doQuery()
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/**
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* Execute a query
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* @param string $query query
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* @param boolean $isManip if the query is a manipulation query
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* @param resource $connection
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* @param string $database_name
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* @return result or error object
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* @access protected
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*/
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function _doQuery($query, $isManip = false, $connection = null, $database_name = null)
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{
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$this->last_query = $query;
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$this->debug($query, 'query');
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if ($this->options['disable_query']) {
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if ($isManip) {
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return 0;
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}
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return null;
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}
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if (is_null($connection)) {
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$err = $this->connect();
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if (PEAR::isError($err)) {
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return $err;
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}
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$connection = $this->connection;
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}
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if (is_null($database_name)) {
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$database_name = $this->database_name;
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}
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if ($database_name) {
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if ($database_name != $this->connected_database_name) {
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if (!@mysql_select_db($database_name, $connection)) {
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return $this->raiseError();
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}
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$this->connected_database_name = $database_name;
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}
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}
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$function = $this->options['result_buffering']
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? 'mysql_query' : 'mysql_unbuffered_query';
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$result = @$function($query, $connection);
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if (!$result) {
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return $this->raiseError();
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}
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if ($isManip) {
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return @mysql_affected_rows($connection);
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}
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return $result;
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}
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// }}}
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// {{{ _modifyQuery()
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/**
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* Changes a query string for various DBMS specific reasons
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*
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* @param string $query query to modify
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* @return the new (modified) query
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* @access protected
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*/
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function _modifyQuery($query, $isManip, $limit, $offset)
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{
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if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) {
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// "DELETE FROM table" gives 0 affected rows in MySQL.
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// This little hack lets you know how many rows were deleted.
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if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
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$query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
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'DELETE FROM \1 WHERE 1=1', $query);
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}
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}
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if ($limit > 0
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&& !preg_match('/LIMIT\s*\d(\s*(,|OFFSET)\s*\d+)?/i', $query)
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) {
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$query = rtrim($query);
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if (substr($query, -1) == ';') {
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$query = substr($query, 0, -1);
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}
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if ($isManip) {
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return $query . " LIMIT $limit";
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} else {
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return $query . " LIMIT $offset, $limit";
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}
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}
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return $query;
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}
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// }}}
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// {{{ replace()
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/**
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* Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
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* query, except that if there is already a row in the table with the same
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* key field values, the REPLACE query just updates its values instead of
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* inserting a new row.
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*
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* The REPLACE type of query does not make part of the SQL standards. Since
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* practically only MySQL implements it natively, this type of query is
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* emulated through this method for other DBMS using standard types of
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* queries inside a transaction to assure the atomicity of the operation.
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*
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* @access public
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*
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* @param string $table name of the table on which the REPLACE query will
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* be executed.
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* @param array $fields associative array that describes the fields and the
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* values that will be inserted or updated in the specified table. The
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* indexes of the array are the names of all the fields of the table. The
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* values of the array are also associative arrays that describe the
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* values and other properties of the table fields.
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*
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* Here follows a list of field properties that need to be specified:
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*
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* value:
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* Value to be assigned to the specified field. This value may be
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* of specified in database independent type format as this
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* function can perform the necessary datatype conversions.
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*
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* Default:
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* this property is required unless the Null property
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* is set to 1.
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*
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* type
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* Name of the type of the field. Currently, all types Metabase
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* are supported except for clob and blob.
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*
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* Default: no type conversion
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*
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* null
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* Boolean property that indicates that the value for this field
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* should be set to null.
|
*
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* The default value for fields missing in INSERT queries may be
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* specified the definition of a table. Often, the default value
|
* is already null, but since the REPLACE may be emulated using
|
* an UPDATE query, make sure that all fields of the table are
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* listed in this function argument array.
|
*
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* Default: 0
|
*
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* key
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* Boolean property that indicates that this field should be
|
* handled as a primary key or at least as part of the compound
|
* unique index of the table that will determine the row that will
|
* updated if it exists or inserted a new row otherwise.
|
*
|
* This function will fail if no key field is specified or if the
|
* value of a key field is set to null because fields that are
|
* part of unique index they may not be null.
|
*
|
* Default: 0
|
*
|
* @return mixed MDB2_OK on success, a MDB2 error on failure
|
*/
|
function replace($table, $fields)
|
{
|
$count = count($fields);
|
$query = $values = '';
|
$keys = $colnum = 0;
|
for (reset($fields); $colnum < $count; next($fields), $colnum++) {
|
$name = key($fields);
|
if ($colnum > 0) {
|
$query .= ',';
|
$values.= ',';
|
}
|
$query.= $name;
|
if (isset($fields[$name]['null']) && $fields[$name]['null']) {
|
$value = 'NULL';
|
} else {
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$value = $this->quote($fields[$name]['value'], $fields[$name]['type']);
|
}
|
$values.= $value;
|
if (isset($fields[$name]['key']) && $fields[$name]['key']) {
|
if ($value === 'NULL') {
|
return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
|
'replace: key value '.$name.' may not be NULL');
|
}
|
$keys++;
|
}
|
}
|
if ($keys == 0) {
|
return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
|
'replace: not specified which fields are keys');
|
}
|
$query = "REPLACE INTO $table ($query) VALUES ($values)";
|
$this->last_query = $query;
|
$this->debug($query, 'query');
|
return $this->_doQuery($query, true);
|
}
|
|
// }}}
|
// {{{ nextID()
|
|
/**
|
* returns the next free id of a sequence
|
*
|
* @param string $seq_name name of the sequence
|
* @param boolean $ondemand when true the seqence is
|
* automatic created, if it
|
* not exists
|
*
|
* @return mixed MDB2 Error Object or id
|
* @access public
|
*/
|
function nextID($seq_name, $ondemand = true)
|
{
|
$sequence_name = $this->getSequenceName($seq_name);
|
$query = "INSERT INTO $sequence_name (".$this->options['seqcol_name'].") VALUES (NULL)";
|
$this->expectError(MDB2_ERROR_NOSUCHTABLE);
|
$result = $this->_doQuery($query, true);
|
$this->popExpect();
|
if (PEAR::isError($result)) {
|
if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
|
$this->loadModule('Manager');
|
// Since we are creating the sequence on demand
|
// we know the first id = 1 so initialize the
|
// sequence at 2
|
$result = $this->manager->createSequence($seq_name, 2);
|
if (PEAR::isError($result)) {
|
return $this->raiseError(MDB2_ERROR, null, null,
|
'nextID: on demand sequence '.$seq_name.' could not be created');
|
} else {
|
// First ID of a newly created sequence is 1
|
return 1;
|
}
|
}
|
return $result;
|
}
|
$value = $this->queryOne('SELECT LAST_INSERT_ID()', 'integer');
|
if (is_numeric($value)) {
|
$query = "DELETE FROM $sequence_name WHERE ".$this->options['seqcol_name']." < $value";
|
$result = $this->_doQuery($query, true);
|
if (PEAR::isError($result)) {
|
$this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
|
}
|
}
|
return $value;
|
}
|
|
// }}}
|
// {{{ lastInsertID()
|
|
/**
|
* returns the autoincrement ID if supported or $id
|
*
|
* @param mixed $id value as returned by getBeforeId()
|
* @param string $table name of the table into which a new row was inserted
|
* @return mixed MDB2 Error Object or id
|
* @access public
|
*/
|
function lastInsertID($table = null, $field = null)
|
{
|
return $this->queryOne('SELECT LAST_INSERT_ID()', 'integer');
|
}
|
|
// }}}
|
// {{{ currID()
|
|
/**
|
* returns the current id of a sequence
|
*
|
* @param string $seq_name name of the sequence
|
* @return mixed MDB2 Error Object or id
|
* @access public
|
*/
|
function currID($seq_name)
|
{
|
$sequence_name = $this->getSequenceName($seq_name);
|
$query = "SELECT MAX(".$this->options['seqcol_name'].") FROM $sequence_name";
|
return $this->queryOne($query, 'integer');
|
}
|
}
|
|
class MDB2_Result_mysql extends MDB2_Result_Common
|
{
|
// }}}
|
// {{{ fetchRow()
|
|
/**
|
* Fetch a row and insert the data into an existing array.
|
*
|
* @param int $fetchmode how the array data should be indexed
|
* @param int $rownum number of the row where the data can be found
|
* @return int data array on success, a MDB2 error on failure
|
* @access public
|
*/
|
function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
|
{
|
if (!is_null($rownum)) {
|
$seek = $this->seek($rownum);
|
if (PEAR::isError($seek)) {
|
return $seek;
|
}
|
}
|
if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
|
$fetchmode = $this->db->fetchmode;
|
}
|
if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
|
$row = @mysql_fetch_assoc($this->result);
|
if (is_array($row)
|
&& $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
|
) {
|
$row = array_change_key_case($row, $this->db->options['field_case']);
|
}
|
} else {
|
$row = @mysql_fetch_row($this->result);
|
}
|
|
if (!$row) {
|
if (is_null($this->result)) {
|
$err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
'fetchRow: resultset has already been freed');
|
return $err;
|
}
|
$null = null;
|
return $null;
|
}
|
if ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL) {
|
$this->db->_fixResultArrayValues($row, MDB2_PORTABILITY_EMPTY_TO_NULL);
|
}
|
if (!empty($this->values)) {
|
$this->_assignBindColumns($row);
|
}
|
if (!empty($this->types)) {
|
$row = $this->db->datatype->convertResultRow($this->types, $row);
|
}
|
if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
|
$object_class = $this->db->options['fetch_class'];
|
if ($object_class == 'stdClass') {
|
$row = (object) $row;
|
} else {
|
$row = &new $object_class($row);
|
}
|
}
|
++$this->rownum;
|
return $row;
|
}
|
|
// }}}
|
// {{{ _getColumnNames()
|
|
/**
|
* Retrieve the names of columns returned by the DBMS in a query result.
|
*
|
* @return mixed an associative array variable
|
* that will hold the names of columns. The
|
* indexes of the array are the column names
|
* mapped to lower case and the values are the
|
* respective numbers of the columns starting
|
* from 0. Some DBMS may not return any
|
* columns when the result set does not
|
* contain any rows.
|
*
|
* a MDB2 error on failure
|
* @access private
|
*/
|
function _getColumnNames()
|
{
|
$columns = array();
|
$numcols = $this->numCols();
|
if (PEAR::isError($numcols)) {
|
return $numcols;
|
}
|
for ($column = 0; $column < $numcols; $column++) {
|
$column_name = @mysql_field_name($this->result, $column);
|
$columns[$column_name] = $column;
|
}
|
if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
|
$columns = array_change_key_case($columns, $this->db->options['field_case']);
|
}
|
return $columns;
|
}
|
|
// }}}
|
// {{{ numCols()
|
|
/**
|
* Count the number of columns returned by the DBMS in a query result.
|
*
|
* @return mixed integer value with the number of columns, a MDB2 error
|
* on failure
|
* @access public
|
*/
|
function numCols()
|
{
|
$cols = @mysql_num_fields($this->result);
|
if (is_null($cols)) {
|
if (is_null($this->result)) {
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
'numCols: resultset has already been freed');
|
}
|
return $this->db->raiseError();
|
}
|
return $cols;
|
}
|
|
// }}}
|
// {{{ free()
|
|
/**
|
* Free the internal resources associated with result.
|
*
|
* @return boolean true on success, false if result is invalid
|
* @access public
|
*/
|
function free()
|
{
|
$free = @mysql_free_result($this->result);
|
if (!$free) {
|
if (is_null($this->result)) {
|
return MDB2_OK;
|
}
|
return $this->db->raiseError();
|
}
|
$this->result = null;
|
return MDB2_OK;
|
}
|
}
|
|
class MDB2_BufferedResult_mysql extends MDB2_Result_mysql
|
{
|
// }}}
|
// {{{ seek()
|
|
/**
|
* seek to a specific row in a result set
|
*
|
* @param int $rownum number of the row where the data can be found
|
* @return mixed MDB2_OK on success, a MDB2 error on failure
|
* @access public
|
*/
|
function seek($rownum = 0)
|
{
|
if ($this->rownum != ($rownum - 1) && !@mysql_data_seek($this->result, $rownum)) {
|
if (is_null($this->result)) {
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
'seek: resultset has already been freed');
|
}
|
return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
|
'seek: tried to seek to an invalid row number ('.$rownum.')');
|
}
|
$this->rownum = $rownum - 1;
|
return MDB2_OK;
|
}
|
|
// }}}
|
// {{{ valid()
|
|
/**
|
* check if the end of the result set has been reached
|
*
|
* @return mixed true or false on sucess, a MDB2 error on failure
|
* @access public
|
*/
|
function valid()
|
{
|
$numrows = $this->numRows();
|
if (PEAR::isError($numrows)) {
|
return $numrows;
|
}
|
return $this->rownum < ($numrows - 1);
|
}
|
|
// }}}
|
// {{{ numRows()
|
|
/**
|
* returns the number of rows in a result object
|
*
|
* @return mixed MDB2 Error Object or the number of rows
|
* @access public
|
*/
|
function numRows()
|
{
|
$rows = @mysql_num_rows($this->result);
|
if (is_null($rows)) {
|
if (is_null($this->result)) {
|
return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
'numRows: resultset has already been freed');
|
}
|
return $this->raiseError();
|
}
|
return $rows;
|
}
|
}
|
|
class MDB2_Statement_mysql extends MDB2_Statement_Common
|
{
|
|
}
|
?>
|
