Doctrine\DBAL\Connection::releaseSavepoint PHP Method

    public function releaseSavepoint($savepoint)
    {
        if (!$this->getDatabasePlatform()->supportsSavepoints()) {
            throw ConnectionException::savepointsNotSupported();
        }
        if ($this->platform->supportsReleaseSavepoints()) {
            $this->_conn->exec($this->platform->releaseSavePoint($savepoint));
        }
    }

 /**
  * {@inheritDoc}
  */
 public function releaseSavepoint($savepoint)
 {
     $this->connect('master');
     return parent::releaseSavepoint($savepoint);
 }