topic Re: performance ..which one is better in Application Development and Automation Discussions

performance ..which one is better

Former Member — Sat, 16 Sep 2006 00:39:21 GMT

LOOP AT gt_bsak. " INTO wa_bsak.

SELECT SINGLE lifnr FROM lfb1

INTO wa_lifnr

WHERE lifnr = gt_bsak-lifnr

AND bukrs = gt_bsak-bukrs

AND uzawe EQ 'ZN'

IF sy-subrc = 0.

DELETE TABLE gt_bsak. "FROM wa_bsak.

EXIT.

ENDIF.

SELECT SINGLE bktxt FROM bkpf

INTO wa_bktxt

WHERE bukrs = gt_bsak-bukrs

AND belnr = gt_bsak-belnr

AND gjahr = gt_bsak-gjahr.

IF wa_bktxt+0(5) = 'OTPY:' OR

wa_bktxt+0(5) = 'OTPN:'.

DELETE TABLE gt_bsak. " FROM wa_bsak.

EXIT.

ENDIF.

ENDLOOP.

Is the above loop is ok ..performance point of view ? out of select single and SELECT up to 1 rows which one is the better ?

Former Member — Sat, 16 Sep 2006 00:46:05 GMT

Hi Sam,

Avoding a select is always better inside a loop. Whether it is select single or select up to one rows its always better to avoid.

But if the situation is such that you cannot avoid select within a loop then better to use SELECT SINGLE with all KEY FIELDS.

You can also use Field symbols with LOOP as described in the weblog by rich

/people/rich.heilman2/blog/2006/03/07/using-field-symbols-in-loop-statements--performance-boost

Cheers

Message was edited by: Vijayendra Rao

Former Member — Sat, 16 Sep 2006 03:20:22 GMT

I think logic may be more of a problem here than performance. Do you want to <b>EXIT</b> out of the loop or <b>CONTINUE</b> withe the next loop pass?

Rob