Help needed in look up code

Question

Hello ALL,
I am new to ABAP and would like to check if any one can guide me through on the following issue.
DSO-1
Keys: promise#, doc_num, item_num,reason
DSO-2: promise#
field: withdrawn_reason
restrictiont: get only withdrawn reason with 1
DSO-3: doc_num, item_num,reason
fields required: Doc_amount, invoice_num
Target DSO-4: promise#, doc_num, item_num,reason, Doc_amount, invoice_num
I need to use a lookup code in DSO-1 to Target DSO-4 transformations. I think an end routine would work here.
here first I look DSO-2 for getting only those promise#'s that has withdrawn 1
then I have to look for DSO-3 to get doc_amount & invoice_num.
I am actually not much familiar with ABAP. it would be great if someone  can guide me on this.

Answer 1

Hi you can do it this way.
Fetch the values you require from DSO 2 and DSO 3 for your conditions
Use FOR ALL ENTRIES in SOURCE_PACKAGE to fetch all at once
i.e.
select fields from DSO2
into internal_table
for all entries in source_package
where promise#=source_package-promise#
and withdrawn ='1'
now select required data from DSO3 into another internal table.
i.e.
select fields from DSO3
into internal_table2
for all entries in internal_table
where doc_number = internal_table-doc_number
and item=internal_table-item
and reason = internal_table-reason.
Now write field routine to populate the doc_amount and invoice_num
in the field routine it would be something like
read table internal_table2 into work_area
with key doc_number = source_fields-doc_number
and item = source_fields-item
and reason = source_fields-reason.
if sy-subrc = 0. "this means the entry is found in the table
result = work_area-doc_amount.
"same to populate invoice_amount
"result = work_area-invoice_num.
endif.
Hope this helps.
Regards
Joe
Edited by: lazarus_joey on Feb 23, 2012 6:22 PM