In-order to read a specific line of an internal table you need to use the abap READ command.
READů TRANSPORTING NO FIELDS.
READ HASHED Table
READ into FIELD-SYMBOL
There was a new command for 4.6 which should be used when you are reading the itab with its full table key.
Here are a few examples how to use the READ statement
READ TABLE it_itab into wa_itab with TABLE KEY city = pa_city Country = pa_country. READ TABLE I_spfli index 3 ASSIGNING <fs_spfli> " fs_spfli contains values read from I_spfli, same as using WA.