RE: sql not using existing indexes v6r1

Your order by is SVCFRFOM. Do you have an index on that? It might help you out.

Whenever I have a situation like this I use the Run SQL Scripts tool in iSeries Navigator.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-
bounces@xxxxxxxxxxxx] On Behalf Of franz400@xxxxxxxxxxxx
Sent: Tuesday, July 26, 2011 12:16 PM
To: midrange-l@xxxxxxxxxxxx
Subject: sql not using existing indexes v6r1

Select acct,chk#,chkdt, chkseq, svcfrom,svcto from checkhist where
acct=8111222 order by svcfrom,svcto,chk# File has 10 million + records There
are derived indexes, but non-derived with acct as 1st key field.
This account had 45 records
Executed a table scan
There is a QAQQINI in libl, left from V5R4 with Ignore_Derived_Index = *Yes I
had expected it would see the few records with this acct, build a temp table.
Is there something in the select stmt to avoid this behavior?
Jim Franz
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