forked from GNUsocial/gnu-social
1050 lines
32 KiB
PHP
1050 lines
32 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* The PEAR DB driver for PHP's mysql extension
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* for interacting with MySQL databases
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*
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* PHP version 5
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*
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* LICENSE: This source file is subject to version 3.0 of the PHP license
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* that is available through the world-wide-web at the following URI:
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* http://www.php.net/license/3_0.txt. If you did not receive a copy of
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* the PHP License and are unable to obtain it through the web, please
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* send a note to license@php.net so we can mail you a copy immediately.
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*
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* @category Database
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* @package DB
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* @author Stig Bakken <ssb@php.net>
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* @author Daniel Convissor <danielc@php.net>
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* @copyright 1997-2007 The PHP Group
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* @license http://www.php.net/license/3_0.txt PHP License 3.0
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* @version CVS: $Id$
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* @link http://pear.php.net/package/DB
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*/
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/**
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* Obtain the DB_common class so it can be extended from
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*/
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//require_once 'DB/common.php';
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require_once 'common.php';
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/**
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* The methods PEAR DB uses to interact with PHP's mysql extension
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* for interacting with MySQL databases
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*
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* These methods overload the ones declared in DB_common.
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*
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* @category Database
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* @package DB
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* @author Stig Bakken <ssb@php.net>
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* @author Daniel Convissor <danielc@php.net>
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* @copyright 1997-2007 The PHP Group
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* @license http://www.php.net/license/3_0.txt PHP License 3.0
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* @version Release: 1.9.2
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* @link http://pear.php.net/package/DB
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*/
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class DB_mysql extends DB_common
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{
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// {{{ properties
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/**
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* The DB driver type (mysql, oci8, odbc, etc.)
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* @var string
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*/
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public $phptype = 'mysql';
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/**
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* The database syntax variant to be used (db2, access, etc.), if any
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* @var string
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*/
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public $dbsyntax = 'mysql';
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/**
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* The capabilities of this DB implementation
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*
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* The 'new_link' element contains the PHP version that first provided
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* new_link support for this DBMS. Contains false if it's unsupported.
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*
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* Meaning of the 'limit' element:
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* + 'emulate' = emulate with fetch row by number
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* + 'alter' = alter the query
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* + false = skip rows
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*
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* @var array
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*/
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public $features = array(
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'limit' => 'alter',
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'new_link' => '4.2.0',
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'numrows' => true,
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'pconnect' => true,
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'prepare' => false,
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'ssl' => false,
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'transactions' => true,
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);
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/**
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* A mapping of native error codes to DB error codes
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* @var array
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*/
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public $errorcode_map = array(
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1004 => DB_ERROR_CANNOT_CREATE,
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1005 => DB_ERROR_CANNOT_CREATE,
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1006 => DB_ERROR_CANNOT_CREATE,
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1007 => DB_ERROR_ALREADY_EXISTS,
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1008 => DB_ERROR_CANNOT_DROP,
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1022 => DB_ERROR_ALREADY_EXISTS,
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1044 => DB_ERROR_ACCESS_VIOLATION,
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1046 => DB_ERROR_NODBSELECTED,
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1048 => DB_ERROR_CONSTRAINT,
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1049 => DB_ERROR_NOSUCHDB,
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1050 => DB_ERROR_ALREADY_EXISTS,
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1051 => DB_ERROR_NOSUCHTABLE,
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1054 => DB_ERROR_NOSUCHFIELD,
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1061 => DB_ERROR_ALREADY_EXISTS,
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1062 => DB_ERROR_ALREADY_EXISTS,
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1064 => DB_ERROR_SYNTAX,
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1091 => DB_ERROR_NOT_FOUND,
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1100 => DB_ERROR_NOT_LOCKED,
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1136 => DB_ERROR_VALUE_COUNT_ON_ROW,
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1142 => DB_ERROR_ACCESS_VIOLATION,
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1146 => DB_ERROR_NOSUCHTABLE,
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1216 => DB_ERROR_CONSTRAINT,
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1217 => DB_ERROR_CONSTRAINT,
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1356 => DB_ERROR_DIVZERO,
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1451 => DB_ERROR_CONSTRAINT,
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1452 => DB_ERROR_CONSTRAINT,
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);
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/**
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* The raw database connection created by PHP
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* @var resource
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*/
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public $connection;
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/**
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* The DSN information for connecting to a database
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* @var array
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*/
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public $dsn = array();
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/**
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* Should data manipulation queries be committed automatically?
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* @var bool
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* @access private
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*/
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public $autocommit = true;
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/**
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* The quantity of transactions begun
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*
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* {@internal While this is private, it can't actually be designated
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* private in PHP 5 because it is directly accessed in the test suite.}}
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*
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* @var integer
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* @access private
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*/
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public $transaction_opcount = 0;
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/**
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* The database specified in the DSN
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*
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* It's a fix to allow calls to different databases in the same script.
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*
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* @var string
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* @access private
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*/
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public $_db = '';
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// }}}
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// {{{ constructor
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/**
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* This constructor calls <kbd>parent::__construct()</kbd>
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*
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* @return void
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*/
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public function __construct()
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{
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parent::__construct();
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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 server, log in and open the database
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*
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* Don't call this method directly. Use DB::connect() instead.
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*
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* PEAR DB's mysql driver supports the following extra DSN options:
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* + new_link If set to true, causes subsequent calls to connect()
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* to return a new connection link instead of the
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* existing one. WARNING: this is not portable to
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* other DBMS's. Available since PEAR DB 1.7.0.
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* + client_flags Any combination of MYSQL_CLIENT_* constants.
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* Only used if PHP is at version 4.3.0 or greater.
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* Available since PEAR DB 1.7.0.
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*
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* @param array $dsn the data source name
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* @param bool $persistent should the connection be persistent?
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*
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* @return int|object
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*/
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public function connect($dsn, $persistent = false)
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{
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if (!PEAR::loadExtension('mysql')) {
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return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
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}
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$this->dsn = $dsn;
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if ($dsn['dbsyntax']) {
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$this->dbsyntax = $dsn['dbsyntax'];
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}
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$params = array();
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if ($dsn['protocol'] && $dsn['protocol'] == 'unix') {
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$params[0] = ':' . $dsn['socket'];
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} else {
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$params[0] = $dsn['hostspec'] ? $dsn['hostspec']
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: 'localhost';
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if ($dsn['port']) {
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$params[0] .= ':' . $dsn['port'];
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}
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}
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$params[] = $dsn['username'] ? $dsn['username'] : null;
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$params[] = $dsn['password'] ? $dsn['password'] : null;
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if (!$persistent) {
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if (isset($dsn['new_link'])
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&& ($dsn['new_link'] == 'true' || $dsn['new_link'] === true)) {
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$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($dsn['client_flags'])
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? $dsn['client_flags'] : null;
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}
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$connect_function = $persistent ? 'mysql_pconnect' : 'mysql_connect';
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$ini = ini_get('track_errors');
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$php_errormsg = '';
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if ($ini) {
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$this->connection = @call_user_func_array(
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$connect_function,
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$params
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);
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} else {
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@ini_set('track_errors', 1);
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$this->connection = @call_user_func_array(
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$connect_function,
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$params
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);
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@ini_set('track_errors', $ini);
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}
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if (!$this->connection) {
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if (($err = @mysql_error()) != '') {
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return $this->raiseError(
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DB_ERROR_CONNECT_FAILED,
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null,
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null,
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null,
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$err
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);
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} else {
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return $this->raiseError(
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DB_ERROR_CONNECT_FAILED,
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null,
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null,
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null,
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$php_errormsg
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);
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}
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}
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if ($dsn['database']) {
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if (!@mysql_select_db($dsn['database'], $this->connection)) {
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return $this->mysqlRaiseError();
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}
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$this->_db = $dsn['database'];
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}
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return DB_OK;
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}
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// }}}
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// {{{ disconnect()
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/**
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* Produces a DB_Error object regarding the current problem
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*
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* @param int $errno if the error is being manually raised pass a
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* DB_ERROR* constant here. If this isn't passed
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* the error information gathered from the DBMS.
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*
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* @return object the DB_Error object
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*
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* @see DB_common::raiseError(),
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* DB_mysql::errorNative(), DB_common::errorCode()
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*/
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public function mysqlRaiseError($errno = null)
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{
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if ($errno === null) {
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if ($this->options['portability'] & DB_PORTABILITY_ERRORS) {
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$this->errorcode_map[1022] = DB_ERROR_CONSTRAINT;
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$this->errorcode_map[1048] = DB_ERROR_CONSTRAINT_NOT_NULL;
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$this->errorcode_map[1062] = DB_ERROR_CONSTRAINT;
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} else {
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// Doing this in case mode changes during runtime.
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$this->errorcode_map[1022] = DB_ERROR_ALREADY_EXISTS;
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$this->errorcode_map[1048] = DB_ERROR_CONSTRAINT;
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$this->errorcode_map[1062] = DB_ERROR_ALREADY_EXISTS;
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}
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$errno = $this->errorCode(mysql_errno($this->connection));
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}
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return $this->raiseError(
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$errno,
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null,
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null,
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null,
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@mysql_errno($this->connection) . ' ** ' .
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@mysql_error($this->connection)
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);
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}
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// }}}
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// {{{ simpleQuery()
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/**
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* Disconnects from the database server
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*
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* @return bool TRUE on success, FALSE on failure
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*/
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public function disconnect()
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{
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$ret = @mysql_close($this->connection);
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$this->connection = null;
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return $ret;
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}
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// }}}
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// {{{ nextResult()
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/**
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* Sends a query to the database server
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*
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* Generally uses mysql_query(). If you want to use
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* mysql_unbuffered_query() set the "result_buffering" option to 0 using
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* setOptions(). This option was added in Release 1.7.0.
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*
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* @param string the SQL query string
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*
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* @return mixed + a PHP result resrouce for successful SELECT queries
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* + the DB_OK constant for other successful queries
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* + a DB_Error object on failure
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*/
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public function simpleQuery($query)
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{
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$ismanip = $this->_checkManip($query);
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$this->last_query = $query;
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$query = $this->modifyQuery($query);
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if ($this->_db) {
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if (!@mysql_select_db($this->_db, $this->connection)) {
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return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
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}
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}
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if (!$this->autocommit && $ismanip) {
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if ($this->transaction_opcount == 0) {
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$result = @mysql_query('SET AUTOCOMMIT=0', $this->connection);
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$result = @mysql_query('BEGIN', $this->connection);
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if (!$result) {
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return $this->mysqlRaiseError();
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}
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}
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$this->transaction_opcount++;
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}
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if (!$this->options['result_buffering']) {
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$result = @mysql_unbuffered_query($query, $this->connection);
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} else {
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$result = @mysql_query($query, $this->connection);
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}
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if (!$result) {
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return $this->mysqlRaiseError();
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}
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if (is_resource($result)) {
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return $result;
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}
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return DB_OK;
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}
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// }}}
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// {{{ fetchInto()
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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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* This little hack lets you know how many rows were deleted
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* when running a "DELETE FROM table" query. Only implemented
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* if the DB_PORTABILITY_DELETE_COUNT portability option is on.
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*
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* @param string $query the query string to modify
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*
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* @return string the modified query string
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*
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* @access protected
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* @see DB_common::setOption()
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*/
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public function modifyQuery($query)
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{
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if ($this->options['portability'] & DB_PORTABILITY_DELETE_COUNT) {
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// "DELETE FROM table" gives 0 affected rows in MySQL.
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// This little hack lets you know how many rows were deleted.
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if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
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$query = preg_replace(
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'/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
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'DELETE FROM \1 WHERE 1=1',
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$query
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);
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}
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}
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return $query;
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}
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// }}}
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// {{{ freeResult()
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/**
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* Move the internal mysql result pointer to the next available result
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*
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* This method has not been implemented yet.
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*
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* @param a valid sql result resource
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*
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* @return false
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*/
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public function nextResult($result)
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{
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return false;
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}
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// }}}
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// {{{ numCols()
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/**
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* Places a row from the result set into the given array
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*
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* Formating of the array and the data therein are configurable.
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* See DB_result::fetchInto() for more information.
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*
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* This method is not meant to be called directly. Use
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* DB_result::fetchInto() instead. It can't be declared "protected"
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* because DB_result is a separate object.
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*
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* @param resource $result the query result resource
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* @param array $arr the referenced array to put the data in
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* @param int $fetchmode how the resulting array should be indexed
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* @param int $rownum the row number to fetch (0 = first row)
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*
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* @return mixed DB_OK on success, NULL when the end of a result set is
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* reached or on failure
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*
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* @see DB_result::fetchInto()
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*/
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public function fetchInto($result, &$arr, $fetchmode, $rownum = null)
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{
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if ($rownum !== null) {
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if (!@mysql_data_seek($result, $rownum)) {
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return null;
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}
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}
|
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if ($fetchmode & DB_FETCHMODE_ASSOC) {
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$arr = @mysql_fetch_array($result, MYSQL_ASSOC);
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if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
|
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$arr = array_change_key_case($arr, CASE_LOWER);
|
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}
|
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} else {
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$arr = @mysql_fetch_row($result);
|
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}
|
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if (!$arr) {
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return null;
|
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}
|
|
if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
|
|
/*
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* Even though this DBMS already trims output, we do this because
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* a field might have intentional whitespace at the end that
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* gets removed by DB_PORTABILITY_RTRIM under another driver.
|
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*/
|
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$this->_rtrimArrayValues($arr);
|
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}
|
|
if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {
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$this->_convertNullArrayValuesToEmpty($arr);
|
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}
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return DB_OK;
|
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}
|
|
|
|
// }}}
|
|
// {{{ numRows()
|
|
|
|
/**
|
|
* Deletes the result set and frees the memory occupied by the result set
|
|
*
|
|
* This method is not meant to be called directly. Use
|
|
* DB_result::free() instead. It can't be declared "protected"
|
|
* because DB_result is a separate object.
|
|
*
|
|
* @param resource $result PHP's query result resource
|
|
*
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* @return bool TRUE on success, FALSE if $result is invalid
|
|
*
|
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* @see DB_result::free()
|
|
*/
|
|
public function freeResult($result)
|
|
{
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return is_resource($result) ? mysql_free_result($result) : false;
|
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}
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|
|
// }}}
|
|
// {{{ autoCommit()
|
|
|
|
/**
|
|
* Gets the number of columns in a result set
|
|
*
|
|
* This method is not meant to be called directly. Use
|
|
* DB_result::numCols() instead. It can't be declared "protected"
|
|
* because DB_result is a separate object.
|
|
*
|
|
* @param resource $result PHP's query result resource
|
|
*
|
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* @return int|object
|
|
*
|
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* @see DB_result::numCols()
|
|
*/
|
|
public function numCols($result)
|
|
{
|
|
$cols = @mysql_num_fields($result);
|
|
if (!$cols) {
|
|
return $this->mysqlRaiseError();
|
|
}
|
|
return $cols;
|
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}
|
|
|
|
// }}}
|
|
// {{{ commit()
|
|
|
|
/**
|
|
* Gets the number of rows in a result set
|
|
*
|
|
* This method is not meant to be called directly. Use
|
|
* DB_result::numRows() instead. It can't be declared "protected"
|
|
* because DB_result is a separate object.
|
|
*
|
|
* @param resource $result PHP's query result resource
|
|
*
|
|
* @return int|object
|
|
*
|
|
* @see DB_result::numRows()
|
|
*/
|
|
public function numRows($result)
|
|
{
|
|
$rows = @mysql_num_rows($result);
|
|
if ($rows === null) {
|
|
return $this->mysqlRaiseError();
|
|
}
|
|
return $rows;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ rollback()
|
|
|
|
/**
|
|
* Enables or disables automatic commits
|
|
*
|
|
* @param bool $onoff true turns it on, false turns it off
|
|
*
|
|
* @return int DB_OK on success. A DB_Error object if the driver
|
|
* doesn't support auto-committing transactions.
|
|
*/
|
|
public function autoCommit($onoff = false)
|
|
{
|
|
// XXX if $this->transaction_opcount > 0, we should probably
|
|
// issue a warning here.
|
|
$this->autocommit = $onoff ? true : false;
|
|
return DB_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ affectedRows()
|
|
|
|
/**
|
|
* Commits the current transaction
|
|
*
|
|
* @return int|object
|
|
*/
|
|
public function commit()
|
|
{
|
|
if ($this->transaction_opcount > 0) {
|
|
if ($this->_db) {
|
|
if (!@mysql_select_db($this->_db, $this->connection)) {
|
|
return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
|
|
}
|
|
}
|
|
$result = @mysql_query('COMMIT', $this->connection);
|
|
$result = @mysql_query('SET AUTOCOMMIT=1', $this->connection);
|
|
$this->transaction_opcount = 0;
|
|
if (!$result) {
|
|
return $this->mysqlRaiseError();
|
|
}
|
|
}
|
|
return DB_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ nextId()
|
|
|
|
/**
|
|
* Reverts the current transaction
|
|
*
|
|
* @return int|object
|
|
*/
|
|
public function rollback()
|
|
{
|
|
if ($this->transaction_opcount > 0) {
|
|
if ($this->_db) {
|
|
if (!@mysql_select_db($this->_db, $this->connection)) {
|
|
return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
|
|
}
|
|
}
|
|
$result = @mysql_query('ROLLBACK', $this->connection);
|
|
$result = @mysql_query('SET AUTOCOMMIT=1', $this->connection);
|
|
$this->transaction_opcount = 0;
|
|
if (!$result) {
|
|
return $this->mysqlRaiseError();
|
|
}
|
|
}
|
|
return DB_OK;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ createSequence()
|
|
|
|
/**
|
|
* Determines the number of rows affected by a data maniuplation query
|
|
*
|
|
* 0 is returned for queries that don't manipulate data.
|
|
*
|
|
* @return int the number of rows. A DB_Error object on failure.
|
|
*/
|
|
public function affectedRows()
|
|
{
|
|
if ($this->_last_query_manip) {
|
|
return @mysql_affected_rows($this->connection);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ dropSequence()
|
|
|
|
/**
|
|
* Returns the next free id in a sequence
|
|
*
|
|
* @param string $seq_name name of the sequence
|
|
* @param boolean $ondemand when true, the seqence is automatically
|
|
* created if it does not exist
|
|
*
|
|
* @return int|object
|
|
* A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::nextID(), DB_common::getSequenceName(),
|
|
* DB_mysql::createSequence(), DB_mysql::dropSequence()
|
|
*/
|
|
public function nextId($seq_name, $ondemand = true)
|
|
{
|
|
$seqname = $this->getSequenceName($seq_name);
|
|
do {
|
|
$repeat = 0;
|
|
$this->pushErrorHandling(PEAR_ERROR_RETURN);
|
|
$result = $this->query("UPDATE ${seqname} " .
|
|
'SET id=LAST_INSERT_ID(id+1)');
|
|
$this->popErrorHandling();
|
|
if ($result === DB_OK) {
|
|
// COMMON CASE
|
|
$id = @mysql_insert_id($this->connection);
|
|
if ($id != 0) {
|
|
return $id;
|
|
}
|
|
// EMPTY SEQ TABLE
|
|
// Sequence table must be empty for some reason, so fill
|
|
// it and return 1 and obtain a user-level lock
|
|
$result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)");
|
|
if (DB::isError($result)) {
|
|
return $this->raiseError($result);
|
|
}
|
|
if ($result == 0) {
|
|
// Failed to get the lock
|
|
return $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED);
|
|
}
|
|
|
|
// add the default value
|
|
$result = $this->query("REPLACE INTO ${seqname} (id) VALUES (0)");
|
|
if (DB::isError($result)) {
|
|
return $this->raiseError($result);
|
|
}
|
|
|
|
// Release the lock
|
|
$result = $this->getOne('SELECT RELEASE_LOCK('
|
|
. "'${seqname}_lock')");
|
|
if (DB::isError($result)) {
|
|
return $this->raiseError($result);
|
|
}
|
|
// We know what the result will be, so no need to try again
|
|
return 1;
|
|
} elseif ($ondemand && DB::isError($result) &&
|
|
$result->getCode() == DB_ERROR_NOSUCHTABLE) {
|
|
// ONDEMAND TABLE CREATION
|
|
$result = $this->createSequence($seq_name);
|
|
if (DB::isError($result)) {
|
|
return $this->raiseError($result);
|
|
} else {
|
|
$repeat = 1;
|
|
}
|
|
} elseif (DB::isError($result) &&
|
|
$result->getCode() == DB_ERROR_ALREADY_EXISTS) {
|
|
// BACKWARDS COMPAT
|
|
// see _BCsequence() comment
|
|
$result = $this->_BCsequence($seqname);
|
|
if (DB::isError($result)) {
|
|
return $this->raiseError($result);
|
|
}
|
|
$repeat = 1;
|
|
}
|
|
} while ($repeat);
|
|
|
|
return $this->raiseError($result);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _BCsequence()
|
|
|
|
/**
|
|
* Creates a new sequence
|
|
*
|
|
* @param string $seq_name name of the new sequence
|
|
*
|
|
* @return int DB_OK on success. A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::createSequence(), DB_common::getSequenceName(),
|
|
* DB_mysql::nextID(), DB_mysql::dropSequence()
|
|
*/
|
|
public function createSequence($seq_name)
|
|
{
|
|
$seqname = $this->getSequenceName($seq_name);
|
|
$res = $this->query('CREATE TABLE ' . $seqname
|
|
. ' (id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,'
|
|
. ' PRIMARY KEY(id))');
|
|
if (DB::isError($res)) {
|
|
return $res;
|
|
}
|
|
// insert yields value 1, nextId call will generate ID 2
|
|
$res = $this->query("INSERT INTO ${seqname} (id) VALUES (0)");
|
|
if (DB::isError($res)) {
|
|
return $res;
|
|
}
|
|
// so reset to zero
|
|
return $this->query("UPDATE ${seqname} SET id = 0");
|
|
}
|
|
|
|
// }}}
|
|
// {{{ quoteIdentifier()
|
|
|
|
/**
|
|
* Backwards compatibility with old sequence emulation implementation
|
|
* (clean up the dupes)
|
|
*
|
|
* @param string $seqname the sequence name to clean up
|
|
*
|
|
* @return bool|object
|
|
*
|
|
* @access private
|
|
*/
|
|
public function _BCsequence($seqname)
|
|
{
|
|
// Obtain a user-level lock... this will release any previous
|
|
// application locks, but unlike LOCK TABLES, it does not abort
|
|
// the current transaction and is much less frequently used.
|
|
$result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)");
|
|
if (DB::isError($result)) {
|
|
return $result;
|
|
}
|
|
if ($result == 0) {
|
|
// Failed to get the lock, can't do the conversion, bail
|
|
// with a DB_ERROR_NOT_LOCKED error
|
|
return $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED);
|
|
}
|
|
|
|
$highest_id = $this->getOne("SELECT MAX(id) FROM ${seqname}");
|
|
if (DB::isError($highest_id)) {
|
|
return $highest_id;
|
|
}
|
|
// This should kill all rows except the highest
|
|
// We should probably do something if $highest_id isn't
|
|
// numeric, but I'm at a loss as how to handle that...
|
|
$result = $this->query('DELETE FROM ' . $seqname
|
|
. " WHERE id <> $highest_id");
|
|
if (DB::isError($result)) {
|
|
return $result;
|
|
}
|
|
|
|
// If another thread has been waiting for this lock,
|
|
// it will go thru the above procedure, but will have no
|
|
// real effect
|
|
$result = $this->getOne("SELECT RELEASE_LOCK('${seqname}_lock')");
|
|
if (DB::isError($result)) {
|
|
return $result;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ escapeSimple()
|
|
|
|
/**
|
|
* Deletes a sequence
|
|
*
|
|
* @param string $seq_name name of the sequence to be deleted
|
|
*
|
|
* @return int DB_OK on success. A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::dropSequence(), DB_common::getSequenceName(),
|
|
* DB_mysql::nextID(), DB_mysql::createSequence()
|
|
*/
|
|
public function dropSequence($seq_name)
|
|
{
|
|
return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));
|
|
}
|
|
|
|
// }}}
|
|
// {{{ modifyQuery()
|
|
|
|
/**
|
|
* Quotes a string so it can be safely used as a table or column name
|
|
* (WARNING: using names that require this is a REALLY BAD IDEA)
|
|
*
|
|
* WARNING: Older versions of MySQL can't handle the backtick
|
|
* character (<kbd>`</kbd>) in table or column names.
|
|
*
|
|
* @param string $str identifier name to be quoted
|
|
*
|
|
* @return string quoted identifier string
|
|
*
|
|
* @see DB_common::quoteIdentifier()
|
|
* @since Method available since Release 1.6.0
|
|
*/
|
|
public function quoteIdentifier($str)
|
|
{
|
|
return '`' . str_replace('`', '``', $str) . '`';
|
|
}
|
|
|
|
// }}}
|
|
// {{{ modifyLimitQuery()
|
|
|
|
/**
|
|
* Escapes a string according to the current DBMS's standards
|
|
*
|
|
* @param string $str the string to be escaped
|
|
*
|
|
* @return string the escaped string
|
|
*
|
|
* @see DB_common::quoteSmart()
|
|
* @since Method available since Release 1.6.0
|
|
*/
|
|
public function escapeSimple($str)
|
|
{
|
|
if (function_exists('mysql_real_escape_string')) {
|
|
return @mysql_real_escape_string($str, $this->connection);
|
|
} else {
|
|
return @mysql_escape_string($str);
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ mysqlRaiseError()
|
|
|
|
/**
|
|
* Adds LIMIT clauses to a query string according to current DBMS standards
|
|
*
|
|
* @param string $query the query to modify
|
|
* @param int $from the row to start to fetching (0 = the first row)
|
|
* @param int $count the numbers of rows to fetch
|
|
* @param mixed $params array, string or numeric data to be used in
|
|
* execution of the statement. Quantity of items
|
|
* passed must match quantity of placeholders in
|
|
* query: meaning 1 placeholder for non-array
|
|
* parameters or 1 placeholder per array element.
|
|
*
|
|
* @return string the query string with LIMIT clauses added
|
|
*
|
|
* @access protected
|
|
*/
|
|
public function modifyLimitQuery($query, $from, $count, $params = array())
|
|
{
|
|
if (DB::isManip($query) || $this->_next_query_manip) {
|
|
return $query . " LIMIT $count";
|
|
} else {
|
|
return $query . " LIMIT $from, $count";
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ errorNative()
|
|
|
|
/**
|
|
* Gets the DBMS' native error code produced by the last query
|
|
*
|
|
* @return int the DBMS' error code
|
|
*/
|
|
public function errorNative()
|
|
{
|
|
return @mysql_errno($this->connection);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ tableInfo()
|
|
|
|
/**
|
|
* Returns information about a table or a result set
|
|
*
|
|
* @param object|string $result DB_result object from a query or a
|
|
* string containing the name of a table.
|
|
* While this also accepts a query result
|
|
* resource identifier, this behavior is
|
|
* deprecated.
|
|
* @param int $mode a valid tableInfo mode
|
|
*
|
|
* @return array|object
|
|
* A DB_Error object on failure.
|
|
*
|
|
* @see DB_common::tableInfo()
|
|
*/
|
|
public function tableInfo($result, $mode = null)
|
|
{
|
|
if (is_string($result)) {
|
|
// Fix for bug #11580.
|
|
if ($this->_db) {
|
|
if (!@mysql_select_db($this->_db, $this->connection)) {
|
|
return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Probably received a table name.
|
|
* Create a result resource identifier.
|
|
*/
|
|
$id = @mysql_query(
|
|
"SELECT * FROM $result LIMIT 0",
|
|
$this->connection
|
|
);
|
|
$got_string = true;
|
|
} elseif (isset($result->result)) {
|
|
/*
|
|
* Probably received a result object.
|
|
* Extract the result resource identifier.
|
|
*/
|
|
$id = $result->result;
|
|
$got_string = false;
|
|
} else {
|
|
/*
|
|
* Probably received a result resource identifier.
|
|
* Copy it.
|
|
* Deprecated. Here for compatibility only.
|
|
*/
|
|
$id = $result;
|
|
$got_string = false;
|
|
}
|
|
|
|
if (!is_resource($id)) {
|
|
return $this->mysqlRaiseError(DB_ERROR_NEED_MORE_DATA);
|
|
}
|
|
|
|
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
|
|
$case_func = 'strtolower';
|
|
} else {
|
|
$case_func = 'strval';
|
|
}
|
|
|
|
$count = @mysql_num_fields($id);
|
|
$res = array();
|
|
|
|
if ($mode) {
|
|
$res['num_fields'] = $count;
|
|
}
|
|
|
|
for ($i = 0; $i < $count; $i++) {
|
|
$res[$i] = array(
|
|
'table' => $case_func(@mysql_field_table($id, $i)),
|
|
'name' => $case_func(@mysql_field_name($id, $i)),
|
|
'type' => @mysql_field_type($id, $i),
|
|
'len' => @mysql_field_len($id, $i),
|
|
'flags' => @mysql_field_flags($id, $i),
|
|
);
|
|
if ($mode & DB_TABLEINFO_ORDER) {
|
|
$res['order'][$res[$i]['name']] = $i;
|
|
}
|
|
if ($mode & DB_TABLEINFO_ORDERTABLE) {
|
|
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
|
|
}
|
|
}
|
|
|
|
// free the result only if we were called on a table
|
|
if ($got_string) {
|
|
@mysql_free_result($id);
|
|
}
|
|
return $res;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getSpecialQuery()
|
|
|
|
/**
|
|
* Obtains the query string needed for listing a given type of objects
|
|
*
|
|
* @param string $type the kind of objects you want to retrieve
|
|
*
|
|
* @return string the SQL query string or null if the driver doesn't
|
|
* support the object type requested
|
|
*
|
|
* @access protected
|
|
* @see DB_common::getListOf()
|
|
*/
|
|
public function getSpecialQuery($type)
|
|
{
|
|
switch ($type) {
|
|
case 'tables':
|
|
return 'SHOW TABLES';
|
|
case 'users':
|
|
return 'SELECT DISTINCT User FROM mysql.user';
|
|
case 'databases':
|
|
return 'SHOW DATABASES';
|
|
default:
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|