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<?php
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/*
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* $Id: Mysql.php 7490 2010-03-29 19:53:27Z jwage $
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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 FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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/**
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*
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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* @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @package Doctrine
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* @subpackage Transaction
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* @link www.doctrine-project.org
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* @since 1.0
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* @version $Revision: 7490 $
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*/
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class Doctrine_Transaction_Mysql extends Doctrine_Transaction
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{
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/**
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* createSavepoint
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* creates a new savepoint
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*
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* @param string $savepoint name of a savepoint to set
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* @return void
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*/
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protected function createSavePoint($savepoint)
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{
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$query = 'SAVEPOINT ' . $savepoint;
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return $this->conn->execute($query);
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}
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/**
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* releaseSavePoint
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* releases given savepoint
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*
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* @param string $savepoint name of a savepoint to release
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* @return void
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*/
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protected function releaseSavePoint($savepoint)
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{
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$query = 'RELEASE SAVEPOINT ' . $savepoint;
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return $this->conn->execute($query);
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}
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/**
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* rollbackSavePoint
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* releases given savepoint
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*
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* @param string $savepoint name of a savepoint to rollback to
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* @return void
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*/
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protected function rollbackSavePoint($savepoint)
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{
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$query = 'ROLLBACK TO SAVEPOINT ' . $savepoint;
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return $this->conn->execute($query);
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}
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/**
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* Set the transacton isolation level.
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*
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* @param string standard isolation level
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* READ UNCOMMITTED (allows dirty reads)
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* READ COMMITTED (prevents dirty reads)
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* REPEATABLE READ (prevents nonrepeatable reads)
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* SERIALIZABLE (prevents phantom reads)
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*
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* @throws Doctrine_Transaction_Exception if using unknown isolation level
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* @throws PDOException if something fails at the PDO level
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* @return void
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*/
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public function setIsolation($isolation)
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{
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switch ($isolation) {
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case 'READ UNCOMMITTED':
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case 'READ COMMITTED':
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case 'REPEATABLE READ':
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case 'SERIALIZABLE':
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break;
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default:
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throw new Doctrine_Transaction_Exception('Isolation level ' . $isolation . ' is not supported.');
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}
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$query = 'SET SESSION TRANSACTION ISOLATION LEVEL ' . $isolation;
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return $this->conn->execute($query);
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}
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/**
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* getTransactionIsolation
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*
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* @return string returns the current session transaction isolation level
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*/
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public function getIsolation()
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{
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return $this->conn->fetchOne('SELECT @@tx_isolation');
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}
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}
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