From: Simon Riggs <simon@2ndquadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Kevin Grittner <Kevin.Grittner@wicourts.gov>
Cc: pgsql-performance@postgresql.org, Andreas Kretschmer <akretschmer@spamfence.net>
Subject: Re: BETWEEN optimizer problems with single-value
Date: Thu, 16 Mar 2006 00:07:06 +0000
Message-ID: <1142467626.3859.207.camel@localhost.localdomain> (raw)
In-Reply-To: <28798.1142450270@sss.pgh.pa.us>
References: <44180105.EE98.0025.0@wicourts.gov>
<20060315181735.GA22240@KanotixBox>
<44180D33.EE98.0025.0@wicourts.gov>
<28798.1142450270@sss.pgh.pa.us>
On Wed, 2006-03-15 at 14:17 -0500, Tom Lane wrote:
> It looks to me like this is a matter of bad cost estimation, ie, it's
> thinking the other index is cheaper to use. Why that is is not clear.
> Can we see the pg_stats rows for ctofcNo and calDate?
ISTM that when the BETWEEN constants match we end up in this part of
clauselist_selectivity()...
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To: pgsql-performance@postgresql.org
Cc: simon@2ndquadrant.com, tgl@sss.pgh.pa.us, Kevin.Grittner@wicourts.gov, akretschmer@spamfence.net
Subject: Re: BETWEEN optimizer problems with single-value
In-Reply-To: <1142467626.3859.207.camel@localhost.localdomain>
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