Optimize Performance in getting Quantity of Open PO per Material and Plant

Question

Hi,
Recently I have a project that requires me to get the quantity of the open Purchase Orders (no Goods Reciept yet). The current code I have to get this are as follows (with some alterations):
<b>select MATNR WERKS MENGE
from EKPO into table i_purchase
for all entries in i_tab
where MATNR = i_tab-MATNR
   and WERKS = i_tab-WERKS
   and ELIKZ = space.
loop at i_tab.
       loop at i_purchase where matnr = i_tab-matnr
                                      and werks = i_tab-werks.
           i_tab-menge = i_tab-menge + i_purchase-menge.
       endloop.
modify i_tab.
clear i_tab.
endloop.</b>
Now there is nothing wrong with the program here its just that the user I know would tend to proccess a large number of materials per report and would cause a <b>Time Out</b> because of the data being proccessed. It also needs to be run online so background processing is out of the question.
Question is, is there a better way where I can get the same results with a better performance and possible avoiding the same time out again (i.e. other database tables, improved logic, coding impmlementation, etc.) ?
Hope to hear from you soon.
Take care and good day.

Answer 1

Hi,
Try this:
IN select stmt:
1.  use select statement validating i_tab. like:
if i_tab is not initial.
select MATNR WERKS MENGE
from EKPO into table i_purchase
for all entries in i_tab
where MATNR = i_tab-MATNR
and WERKS = i_tab-WERKS
and ELIKZ = space.
endif.
2. Chk this possiblility:  do not add elikz = space condition into wyhere clause of select stmt and remove unwated entries from i_tab using DELETE i_tab where elikz =ne space. this will surely improve performance of select stmt as elikz is not a key field.  but this chk once.
In LOOP:
1. donot use loop stmt insterasd use read table stmt for that sort itab with fields MATNR WERKS. and then use BINARY SEARCH in thi s clause. using bs will improver ur prg perfromance drastically.
2. instead of loop at itab use field symbol this is also very help ful. but try above oprtion and then go for it... any way loop with fs is better than loop at itab .
Hope this will help u.
Jogdand M B