Functionscan estimates

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Functionscan estimates
Date: 2005-04-08 22:15:50
Message-ID: 200504081515.50340.josh@agliodbs.com
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Folks,

I'm wondering if it might be useful to be able to add estimated selectivity to
a function definition for purposes of query estimation. Currently function
scans automatically return a flat default 1000 estimated rows. It seems
like the DBA ought to be able to ALTER FUNCTION and give it a row estimate
for planning purposes.

Thoughts?

--
--Josh

Josh Berkus
Aglio Database Solutions
San Francisco

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