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From: Josh Berkus <josh@agliodbs.com>
To: Brendan Jurd <direvus@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: Constraint exclusion can't process simple constant expressions?
Date: Wed, 20 Apr 2011 19:18:23 -0700
Message-ID: <4DAF93EF.5070102@agliodbs.com> (raw)
In-Reply-To: <BANLkTimHBZzEwSR+YBXCLAopvKKuh=1i5A@mail.gmail.com>
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> You may be thinking of the STABLE volatility level.  It requires that
> the results of the function are the same for the same inputs, within
> the same transaction.

Right.  But CE will only pay attention to immutable values, not stable
ones, AFAICT.

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com



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