Passing a table to a subrutine

Question

Hi,
I have an internal table itab[].
i want to pass this internal table to a subroutine
using field-symbol.
Can any one tell how to pass the field symbol of the table to the subroutine and subsequently process it. Thanks.

Answer 1

Hi Sibi,
You can not pass a field symbol to a form routine as defining subroutine parameters as field symbols is not allowed. You can pass a field symbol that points to a table to the form routine parameter which is a table. Then in the form routine you can create a local field symbol for the passed table and assign the passed table to the local field symbol and handle it as you like with in the form routine.
See below:
data itab type STANDARD TABLE OF sflight.
FIELD-SYMBOLS: <itab> type STANDARD TABLE,
               <gfs_itab> type sflight.
ASSIGN itab to <itab>. "assign the table to the field symbol
perform get_name USING <itab>. "pass the field symbol
loop at <itab> ASSIGNING <gfs_itab>. "use the modified table
  write :/ <gfs_itab>-carrid,
           <gfs_itab>-connid.
ENDLOOP.
form get_name using p_itab type standard table.
  FIELD-SYMBOLS: <lfs_itab> type STANDARD TABLE. "define a local field symbol
  data: lwa_itab type sflight.
  assign p_itab to <lfs_itab>. "assign the passed table to the local field symbol
" modified the local field symbol (table)
  lwa_itab-carrid = 'AA'.
  lwa_itab-connid = '123'.
  append lwa_itab to <lfs_itab>.
  lwa_itab-carrid = 'LH'.
  lwa_itab-connid = '456'.
  append lwa_itab to <lfs_itab>.
endform.
Hope this helps.
Thanks
Sanjeev