From: Tom Lane <tgl@sss.pgh.pa.us>
To: Mark Liberman <mliberman@mixedsignals.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Stable function being evaluated more than once in a single query
Date: Wed, 11 Jan 2006 23:33:23 -0500
Message-ID: <935.1137040403@sss.pgh.pa.us> (raw)
In-Reply-To: <200601111641.20627.mliberman@mixedsignals.com>
References: <200601111641.20627.mliberman@mixedsignals.com>
Mark Liberman <mliberman@mixedsignals.com> writes:
> I've got a set-returning function, defined as STABLE, that I reference twice
> within a single query, yet appears to be evaluated via two seperate function
> scans.
There is no guarantee, express or implied, that this won't be the case.
(Seems like we just discussed this a couple days ago...)
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, mliberman@mixedsignals.com
Subject: Re: Stable function being evaluated more than once in a single query
In-Reply-To: <935.1137040403@sss.pgh.pa.us>
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