OK - in that same vain, I thought of something even better - using dynamic SQL instead. It sped things up right away!
Thanks for putting me on the right track!
________________________________________
From: Scott Marlowe [scott.marlowe@gmail.com]
Sent: Tuesday, December 18, 2007 12:02 PM
To: Weber, Geoffrey M.
Cc: Tom Lane; pgsql-general@postgresql.org
Subject: Re: [GENERAL] Problem with index not being chosen inside PL/PgSQL function...
On Dec 18, 2007 10:54 AM, Weber, Geoffrey M.
<Geoffrey.Weber@mcleodusa.com> wrote:
> Tom,
>
> Yes, the distribution must be what's doing it. I guess I knew that subconciously, but was looking for something like
hintsto force the planner to do what I wanted. Instead it looks like I'll have to do a bit of tweaking with my
indexes. Probably a partial index on the 'not_displayed_id' column. It'll be very small and shouldn't cause much
overhead. I was trying to keep my index count down, and have had a dual-column index on (replaced_by_id,
not_displayed_id)to this point.
Fix not with a hammer that which you can fix with a screwdriver. Fix
not with a screwdriver that which you can fix with a knob
Have you tried increasing the stats target of the guilty column and
reanalyzing to see if that helps?
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