Performance issue - smart response required

Question

Hi Guyz,
SELECT * FROM regup
INTO CORRESPONDING FIELDS OF TABLE itab1
FOR ALL ENTRIES IN itab
WHERE bukrs = itab-bukrs
AND belnr = itab-belnr
AND lifnr = itab-lifnr
AND gjahr = itab-gjahr
AND vblnr NE space.
This query is taking 2.5 mins to execute, I have to increase its performance.
FYI
itab has 2677 number of records
and final data in table itab1 has 3536 number of enteries. Its taking huge time, 2.5 mins to execute this portion. How can I increase the performance of this query.
Pls it's urgent.
<i>Note: If google can fetch the data from around the globe in fractoin of seconds, then at least it's not impossible.</i>
Your answers will be rewarded.

Answer 1

It would be useful to know what business requirement this is trying to meet - it looks like you are trying to trawl through the payment run line items table for a series of document numbers, but you may already have some of this same data available from BKPF & BSEG, or at least more quickly accessible by travelling through these tables first.
For example, I'm not sure if it's site configured or standard, but I have seen the LAUFD and LAUFI value concatenated into the BKPF-BKTXT field on the paying (clearing) document, e.g. "20070205-123456", which would mean you could then get to the REGUP data much more efficiently.