Source for file mysql.php
Documentation is available at mysql.php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
* The PEAR DB driver for PHP's mysql extension
* for interacting with MySQL databases
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
* @author Stig Bakken <ssb@php.net>
* @author Daniel Convissor <danielc@php.net>
* @copyright 1997-2007 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id: mysql.php,v 1.126 2007/09/21 13:32:52 aharvey Exp $
* @link http://pear.php.net/package/DB
* Obtain the DB_common class so it can be extended from
require_once 'DB/common.php';
* The methods PEAR DB uses to interact with PHP's mysql extension
* for interacting with MySQL databases
* These methods overload the ones declared in DB_common.
* @author Stig Bakken <ssb@php.net>
* @author Daniel Convissor <danielc@php.net>
* @copyright 1997-2007 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: 1.7.14RC1
* @link http://pear.php.net/package/DB
* The DB driver type (mysql, oci8, odbc, etc.)
* The database syntax variant to be used (db2, access, etc.), if any
* The capabilities of this DB implementation
* The 'new_link' element contains the PHP version that first provided
* new_link support for this DBMS. Contains false if it's unsupported.
* Meaning of the 'limit' element:
* + 'emulate' = emulate with fetch row by number
* + 'alter' = alter the query
* A mapping of native error codes to DB error codes
1004 => DB_ERROR_CANNOT_CREATE ,
1005 => DB_ERROR_CANNOT_CREATE ,
1006 => DB_ERROR_CANNOT_CREATE ,
1007 => DB_ERROR_ALREADY_EXISTS ,
1008 => DB_ERROR_CANNOT_DROP ,
1022 => DB_ERROR_ALREADY_EXISTS ,
1044 => DB_ERROR_ACCESS_VIOLATION ,
1046 => DB_ERROR_NODBSELECTED ,
1048 => DB_ERROR_CONSTRAINT ,
1049 => DB_ERROR_NOSUCHDB ,
1050 => DB_ERROR_ALREADY_EXISTS ,
1051 => DB_ERROR_NOSUCHTABLE ,
1054 => DB_ERROR_NOSUCHFIELD ,
1061 => DB_ERROR_ALREADY_EXISTS ,
1062 => DB_ERROR_ALREADY_EXISTS ,
1091 => DB_ERROR_NOT_FOUND ,
1100 => DB_ERROR_NOT_LOCKED ,
1136 => DB_ERROR_VALUE_COUNT_ON_ROW ,
1142 => DB_ERROR_ACCESS_VIOLATION ,
1146 => DB_ERROR_NOSUCHTABLE ,
1216 => DB_ERROR_CONSTRAINT ,
1217 => DB_ERROR_CONSTRAINT ,
1356 => DB_ERROR_DIVZERO ,
1451 => DB_ERROR_CONSTRAINT ,
1452 => DB_ERROR_CONSTRAINT ,
* The raw database connection created by PHP
* The DSN information for connecting to a database
* Should data manipulation queries be committed automatically?
* The quantity of transactions begun
* {@internal While this is private, it can't actually be designated
* private in PHP 5 because it is directly accessed in the test suite.}}}
var $transaction_opcount = 0;
* The database specified in the DSN
* It's a fix to allow calls to different databases in the same script.
* This constructor calls <kbd>$this->DB_common()</kbd>
* Connect to the database server, log in and open the database
* Don't call this method directly. Use DB::connect() instead.
* PEAR DB's mysql driver supports the following extra DSN options:
* + new_link If set to true, causes subsequent calls to connect()
* to return a new connection link instead of the
* existing one. WARNING: this is not portable to
* other DBMS's. Available since PEAR DB 1.7.0.
* + client_flags Any combination of MYSQL_CLIENT_* constants.
* Only used if PHP is at version 4.3.0 or greater.
* Available since PEAR DB 1.7.0.
* @param array $dsn the data source name
* @param bool $persistent should the connection be persistent?
* @return int DB_OK on success. A DB_Error object on failure.
function connect($dsn, $persistent = false )
if (!PEAR ::loadExtension ('mysql')) {
if ($dsn['protocol'] && $dsn['protocol'] == 'unix') {
$params[0 ] = ':' . $dsn['socket'];
$params[0 ] = $dsn['hostspec'] ? $dsn['hostspec']
$params[0 ] .= ':' . $dsn['port'];
$params[] = $dsn['username'] ? $dsn['username'] : null;
$params[] = $dsn['password'] ? $dsn['password'] : null;
if (isset ($dsn['new_link'])
&& ($dsn['new_link'] == 'true' || $dsn['new_link'] === true ))
$params[] = isset ($dsn['client_flags'])
? $dsn['client_flags'] : null;
$connect_function = $persistent ? 'mysql_pconnect' : 'mysql_connect';
$this->_db = $dsn['database'];
* Disconnects from the database server
* @return bool TRUE on success, FALSE on failure
* Sends a query to the database server
* Generally uses mysql_query(). If you want to use
* mysql_unbuffered_query() set the "result_buffering" option to 0 using
* setOptions(). This option was added in Release 1.7.0.
* @param string the SQL query string
* @return mixed + a PHP result resrouce for successful SELECT queries
* + the DB_OK constant for other successful queries
* + a DB_Error object on failure
if (!$this->autocommit && $ismanip) {
if ($this->transaction_opcount == 0 ) {
$this->transaction_opcount++;
if (!$this->options['result_buffering']) {
* Move the internal mysql result pointer to the next available result
* This method has not been implemented yet.
* @param a valid sql result resource
* Places a row from the result set into the given array
* Formating of the array and the data therein are configurable.
* See DB_result::fetchInto() for more information.
* This method is not meant to be called directly. Use
* DB_result::fetchInto() instead. It can't be declared "protected"
* because DB_result is a separate object.
* @param resource $result the query result resource
* @param array $arr the referenced array to put the data in
* @param int $fetchmode how the resulting array should be indexed
* @param int $rownum the row number to fetch (0 = first row)
* @return mixed DB_OK on success, NULL when the end of a result set is
* @see DB_result::fetchInto()
function fetchInto($result, &$arr, $fetchmode, $rownum = null )
* Even though this DBMS already trims output, we do this because
* a field might have intentional whitespace at the end that
* gets removed by DB_PORTABILITY_RTRIM under another driver.
* 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
* @return bool TRUE on success, FALSE if $result is invalid
* 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
* @return int the number of columns. A DB_Error object on failure.
* @see DB_result::numCols()
* 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 the number of rows. A DB_Error object on failure.
* @see DB_result::numRows()
* 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.
// XXX if $this->transaction_opcount > 0, we should probably
$this->autocommit = $onoff ? true : false;
* Commits the current transaction
* @return int DB_OK on success. A DB_Error object on failure.
if ($this->transaction_opcount > 0 ) {
$this->transaction_opcount = 0;
* Reverts the current transaction
* @return int DB_OK on success. A DB_Error object on failure.
if ($this->transaction_opcount > 0 ) {
$this->transaction_opcount = 0;
* 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.
* Returns the next free id in a sequence
* @param string $seq_name name of the sequence
* @param boolean $ondemand when true, the seqence is automatically
* created if it does not exist
* @return int the next id number in the sequence.
* A DB_Error object on failure.
* @see DB_common::nextID(), DB_common::getSequenceName(),
* DB_mysql::createSequence(), DB_mysql::dropSequence()
function nextId($seq_name, $ondemand = true )
$this->pushErrorHandling (PEAR_ERROR_RETURN );
$result = $this->query(" UPDATE ${seqname} ".
'SET id=LAST_INSERT_ID(id+1)');
$this->popErrorHandling ();
// 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)" );
// Failed to get the lock
$result = $this->query(" REPLACE INTO ${seqname} (id) VALUES (0)" );
$result = $this->getOne('SELECT RELEASE_LOCK('
// We know what the result will be, so no need to try again
} elseif ($ondemand && DB::isError($result) &&
// ONDEMAND TABLE CREATION
|