Data allocation for internal table rows Dynamically

Question

Hi Friends
I have requirement like below:
I have one internal table with 400 amounts columns, I will get the value from another program
that indicates to which column I have to add the values. I dont want to write the case statement
because I need to write 400 WHEN statements.
Is there any alternative way dynamically I can choose the internal table column and assign the value which
I am getting from external program.
Please help on this as soon as possible.
Points will be rewarded
Thanks
Praveen

Answer 1

Hi Praveen,
you may use the ASSIGN COMPONENT ... OF STRUCTURE ... statement.
It allows to assign the field by name or by sequence.
Assume you columns have names like amount_001 to amount_999 and are fields of structure ls_amounts. The do as decribed here roughly:
data:
  lv_fieldseq type NUMC_3,
  lv_fieldname type fieldname,
  lv_amount type (???).
fieldsymbols:
  <amount> type any.
* fetch amount and field sequence from external data into  lv_amount and lv_fieldseq
concatenate 'AMOUNT_' lv_fieldseq into lv_fieldname.
* <amount> is something like a pointer
assign component (lv_fieldname) of structure ls_amounts to <amount>.
add lv_amount  to <amount>. 
if you are sure you have the correct position of the amount field in the structure stored in variable lv_position, you may use
assign component lv_position of structure ls_amounts to <amount>.
I prefer the ASSIGN (fieldname) for reasons of more transparency and less danger in case of structural changes.
Regards,
Clemens
Regards,
Clemens