Re: Do we still need constraint_exclusion?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Jaime Casanova" <jcasanov(at)systemguards(dot)com(dot)ec>
Cc: "Bruce Momjian" <bruce(at)momjian(dot)us>, "Stephen Frost" <sfrost(at)snowman(dot)net>, "Simon Riggs" <simon(at)2ndquadrant(dot)com>, jd(at)commandprompt(dot)com, "Robert Haas" <robertmhaas(at)gmail(dot)com>, "Greg Smith" <gsmith(at)gregsmith(dot)com>, "Gregory Stark" <stark(at)enterprisedb(dot)com>, "Josh Berkus" <josh(at)agliodbs(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Do we still need constraint_exclusion?
Date: 2009-01-08 04:54:07
Message-ID: 6636.1231390447@sss.pgh.pa.us
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"Jaime Casanova" <jcasanov(at)systemguards(dot)com(dot)ec> writes:
> what i still doesn't understand is why we need a third value at all?

There are cases for wanting all three.

regards, tom lane

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