Update routine infinite loop

Question

Hello Experts,
For loading ODS2 we are making a lookup on ODS1 for 0material based on
purchaing document number, item line item.
Is there any mistake in the start routine or update routine.
Because the load goes in infinite loop. I think update routine should be changed.
Any suggestions are appreciated
Start routine:
data: begin of itab occurs 0,
        pur_doc like /BIC/AZODS100-OI_EBELN,
        item like /BIC/AZODS100-OI_EBELP,
        material like /BIC/AZODS100-material,
      end of itab.
clear itab.
select OI_EBELN OI_EBELP MAT_PLANT from /BIC/AZODS100
         into table itab.
Update routine for 0material
loop at itab where pur_doc = COMM_STRUCTURE-OI_EBELN
                   and item = COMM_STRUCTURE-OI_EBELP.
       RESULT = itab-matplant.
endloop.

Answer 1

Hi,
this takes a long time, because with each record of your data packaged it is doing the loop and scanning each row of the internal table. Use the following instead.
Start routine:
types: begin of t_itab,
pur_doc like /BIC/AZODS100-OI_EBELN,
item like /BIC/AZODS100-OI_EBELP,
material like /BIC/AZODS100-material,
end of t_itab.
data: itab type hashed table of t_itab with unique key pur_doc item.
select OI_EBELN OI_EBELP MAT_PLANT from /BIC/AZODS100
into table itab order by oi_ebeln oi_ebelp mat_plant.
I hope these fields are the key of the ods object.
Update routine for 0material
data: wa_itab type t_itab.
read table itab into wa_itab with table key pur_doc = COMM_STRUCTURE-OI_EBELN
item = COMM_STRUCTURE-OI_EBELP.
if sy-subrc = 0.
RESULT = wa_itab-matplant.
else.
clear result.
endif.
Hope this helps
regards
Siggi