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Subject: Re: BETWEEN optimizer problems with single-value
From: Simon Riggs <simon@2ndquadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Kevin Grittner <Kevin.Grittner@wicourts.gov>,
	pgsql-performance@postgresql.org,
	Andreas Kretschmer <akretschmer@spamfence.net>
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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()...