Agora_Driver::getThreadRoot PHP Метод

    public function getThreadRoot($message_id)
    {
        $sql = 'SELECT message_thread FROM ' . $this->_threads_table . ' WHERE message_id = ?';
        try {
            $thread_id = $this->_db->selectValue($sql, array($message_id));
        } catch (Horde_Db_Exception $e) {
            throw new Agora_Exception($e->getMessage());
        }
        return $thread_id ? $thread_id : $message_id;
    }