Horde_Db_Adapter::transactionStarted PHP Метод

    public function transactionStarted();

 /**
  */
 public function read($id)
 {
     /* Begin a transaction. */
     // TODO: Rowlocking in Mysql
     if (!$this->_db->transactionStarted()) {
         $this->_db->beginDbTransaction();
     }
     /* Build query. */
     $query = sprintf('SELECT session_data FROM %s WHERE session_id = ?', $this->_params['table']);
     $values = array($id);
     /* Execute the query. */
     try {
         $columns = $this->_db->columns($this->_params['table']);
         return $columns['session_data']->binaryToString($this->_db->selectValue($query, $values));
     } catch (Horde_Db_Exception $e) {
         return '';
     }
 }