protected function _rollBack()
    {
        $this->_connect();
        $this->_connection->rollback();
        $this->_connection->autocommit(true);
    }
protected function _rollBack()
    {
        $this->_connect();
        $this->_connection->rollback();
        $this->_connection->autocommit(true);
    }
protected function _rollBack ( ) { $ this -> _connect ( ) ; $ this -> _connection -> rollback ( ) ; $ this -> _connection -> autocommit ( true ) ; }
Roll-back a transaction.

@return void
Roll - back a transaction .