From: Tom Lane <tgl@sss.pgh.pa.us>
To: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: David Rowley <dgrowleyml@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: Performance improvement for joins where outer side is unique
Date: Thu, 26 Feb 2015 12:34:24 -0500
Message-ID: <12606.1424972064@sss.pgh.pa.us> (raw)
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Tomas Vondra <tomas.vondra@2ndquadrant.com> writes:
> FWIW this apparently happens because the code only expect that
> EquivalenceMembers only contain Var, but in this particular case that's
> not the case - it contains RelabelType (because oprcode is regproc, and
> needs to be relabeled to oid).
If it thinks an EquivalenceMember must be a Var, it's outright broken;
I'm pretty sure any nonvolatile expression is possible.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, tomas.vondra@2ndquadrant.com, dgrowleyml@gmail.com
Subject: Re: Performance improvement for joins where outer side is unique
In-Reply-To: <12606.1424972064@sss.pgh.pa.us>
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