Code taking too much time to output

Question

Following  code is taking too much time to execute . (some time giving Time_out )
ind = sy-tabix.
    SELECT SINGLE * FROM mseg INTO mseg
       WHERE bwart = '102' AND
             lfbnr = itab-mblnr AND
             ebeln = itab-ebeln AND
             ebelp = itab-ebelp.
    IF sy-subrc = 0.
      DELETE itab INDEX ind.
      CONTINUE.
Is there any other way to write this code to reduce the output time.
Thanks

Answer 1

Hi,
I think you are executing this code in a loop which is causing the problem. The rule is "Never put SELECT statements inside a loop".
Try to rewrite the code as follows:
* Outside the loop
SELECT *
from MSEG
into table lt_mseg
for all entries in itab
where bwart = '102' AND
lfbnr = itab-mblnr AND
ebeln = itab-ebeln AND
ebelp = itab-ebelp.
Then inside the loop, do a READ on the internal table
Loop at itab.
read table lt_mseg with key bwart = '102'. "plus other conditions
if sy-subrc ne 0.
delete itab. "index is automatically determined here from SY-TABIX
endif.
endloop.
I think this should optimise performance. You can check your code's performance using SE30 or ST05.
Hope this helps! Please revert if you need anything else!!
Cheers,
Shailesh.
Always provide feedback for helpful answers!