protected function hydrateAllData()
    {
        $result = array();

        $data =  $this->_stmt->fetchAll(PDO::FETCH_ASSOC);
        foreach($data as $row)
        {
            $keys = array_keys($row);

            $result[ $row[ $keys[0] ] ] = $row[ $keys[1] ];
        }

        return $result;
    }