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<?php
/*
* $Id: Mysql.php 10831 2013-05-29 19:32:17Z btowles $
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.doctrine-project.org>.
*/
/**
*
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
* @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @package Doctrine
* @subpackage Transaction
* @link www.doctrine-project.org
* @since 1.0
* @version $Revision: 7490 $
*/
class Doctrine_Transaction_Mysql extends Doctrine_Transaction
{
/**
* createSavepoint
* creates a new savepoint
*
* @param string $savepoint name of a savepoint to set
* @return void
*/
protected function createSavePoint($savepoint)
{
$query = 'SAVEPOINT ' . $savepoint;
return $this->conn->execute($query);
}
/**
* releaseSavePoint
* releases given savepoint
*
* @param string $savepoint name of a savepoint to release
* @return void
*/
protected function releaseSavePoint($savepoint)
{
$query = 'RELEASE SAVEPOINT ' . $savepoint;
return $this->conn->execute($query);
}
/**
* rollbackSavePoint
* releases given savepoint
*
* @param string $savepoint name of a savepoint to rollback to
* @return void
*/
protected function rollbackSavePoint($savepoint)
{
$query = 'ROLLBACK TO SAVEPOINT ' . $savepoint;
return $this->conn->execute($query);
}
/**
* Set the transacton isolation level.
*
* @param string standard isolation level
* READ UNCOMMITTED (allows dirty reads)
* READ COMMITTED (prevents dirty reads)
* REPEATABLE READ (prevents nonrepeatable reads)
* SERIALIZABLE (prevents phantom reads)
*
* @throws Doctrine_Transaction_Exception if using unknown isolation level
* @throws PDOException if something fails at the PDO level
* @return void
*/
public function setIsolation($isolation)
{
switch ($isolation) {
case 'READ UNCOMMITTED':
case 'READ COMMITTED':
case 'REPEATABLE READ':
case 'SERIALIZABLE':
break;
default:
throw new Doctrine_Transaction_Exception('Isolation level ' . $isolation . ' is not supported.');
}
$query = 'SET SESSION TRANSACTION ISOLATION LEVEL ' . $isolation;
return $this->conn->execute($query);
}
/**
* getTransactionIsolation
*
* @return string returns the current session transaction isolation level
*/
public function getIsolation()
{
return $this->conn->fetchOne('SELECT @@tx_isolation');
}
}