77 lines
2.5 KiB
PHP
77 lines
2.5 KiB
PHP
<?php
|
|
// $Id$
|
|
|
|
/**
|
|
* @file
|
|
* Database interface code for MySQL database servers.
|
|
*/
|
|
|
|
/**
|
|
* @ingroup database
|
|
* @{
|
|
*/
|
|
|
|
class DatabaseConnection_mysql extends DatabaseConnection {
|
|
|
|
public function __construct(array $connection_options = array()) {
|
|
// This driver defaults to non transaction support.
|
|
$this->transactionSupport = !empty($connection_options['transactions']);
|
|
|
|
// MySQL never supports transactional DDL.
|
|
$this->transactionalDDLSupport = FALSE;
|
|
|
|
// Default to TCP connection on port 3306.
|
|
if (empty($connection_options['port'])) {
|
|
$connection_options['port'] = 3306;
|
|
}
|
|
|
|
$dsn = 'mysql:host=' . $connection_options['host'] . ';port=' . $connection_options['port'] . ';dbname=' . $connection_options['database'];
|
|
parent::__construct($dsn, $connection_options['username'], $connection_options['password'], array(
|
|
// So we don't have to mess around with cursors and unbuffered queries by default.
|
|
PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => TRUE,
|
|
// Because MySQL's prepared statements skip the query cache, because it's dumb.
|
|
PDO::ATTR_EMULATE_PREPARES => TRUE,
|
|
// Force column names to lower case.
|
|
PDO::ATTR_CASE => PDO::CASE_LOWER,
|
|
));
|
|
|
|
// Force MySQL to use the UTF-8 character set by default.
|
|
$this->exec('SET NAMES "utf8"');
|
|
|
|
// Force MySQL's behavior to conform more closely to SQL standards.
|
|
// This allows Drupal to run almost seamlessly on many different
|
|
// kinds of database systems. These settings force MySQL to behave
|
|
// the same as postgresql, or sqlite in regards to syntax interpretation
|
|
// and invalid data handling. See http://drupal.org/node/344575 for further disscussion.
|
|
$this->exec("SET sql_mode='ANSI,TRADITIONAL'");
|
|
}
|
|
|
|
public function queryRange($query, $from, $count, array $args = array(), array $options = array()) {
|
|
return $this->query($query . ' LIMIT ' . $from . ', ' . $count, $args, $options);
|
|
}
|
|
|
|
public function queryTemporary($query, array $args = array(), array $options = array()) {
|
|
$tablename = $this->generateTemporaryTableName();
|
|
$this->query(preg_replace('/^SELECT/i', 'CREATE TEMPORARY TABLE {' . $tablename . '} Engine=MEMORY SELECT', $query), $args, $options);
|
|
return $tablename;
|
|
}
|
|
|
|
public function driver() {
|
|
return 'mysql';
|
|
}
|
|
|
|
public function databaseType() {
|
|
return 'mysql';
|
|
}
|
|
|
|
public function mapConditionOperator($operator) {
|
|
// We don't want to override any of the defaults.
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* @} End of "ingroup database".
|
|
*/
|