RE: SQL performance

["Hopkins, Bill" <BHopkins@xxxxxxxxxxxxx>]

When working with BPCS SQL's on a good size box I've seen an invoice runs go
for 5 days on 1500 invoices. SQL in question read 900,000 recs for each
invoice with no hits. I added one LF for that key/select ran in 20
minutes.Looked like it was doing *Loval Setll, Read all If to me.  Size of
box/LF's compiled in order for optimizer to find was important there. Early
2000 not sure if same now.

Bill H

-----Original Message-----
From: MWalter@hanoverwire.com [mailto:MWalter@hanoverwire.com]
Sent: Thursday, August 22, 2002 9:48 AM
To: rpg400-l@midrange.com
Subject: SQL performance


Hello all,

I am having a problem with query performance with embedded SQL in an RPGLE
procedure. The table in question has about 2m rows. If I issue an
interactive SQL statement, using the same criteria, the results are
relatively quick but the same statement within an RPGLE procedure is
ridiculous. The program ran for 1 1/2 hours and failed to process one
detail record. Any help would be appreciated. The table in question is a
saved inventory history table over which there are no indexes. Just the
primary key. I'd hate to create a logical file over this thing for one
procedure.


Thanks,

Mark


Mark Walter
Sr. Programmer/Analyst
Hanover Wire Cloth a div of CCX, Inc.
mwalter@hanoverwire.com
http://www.hanoverwire.com
717.637.3795 Ext.3040

_______________________________________________
This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
To post a message email: RPG400-L@midrange.com
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/cgi-bin/listinfo/rpg400-l
or email: RPG400-L-request@midrange.com
Before posting, please take a moment to review the archives
at http://archive.midrange.com/rpg400-l.