From: Stephan Szabo <sszabo@megazone23.bigpanda.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Gaetano Mendola <mendola@bigfoot.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Performance inside and outside view ( WAS Re: Select the
Date: Thu, 12 Sep 2002 08:22:54 -0700 (PDT)
Message-ID: <20020912081941.L45896-100000@megazone23.bigpanda.com> (raw)
In-Reply-To: <7350.1031842223@sss.pgh.pa.us>
On Thu, 12 Sep 2002, Tom Lane wrote:
> "Gaetano Mendola" <mendola@bigfoot.com> writes:
> > Yes that's right it's help me,
> > but here the optimizer have some problems:
>
> What's the datatype of id_user, and why are you quoting the compared
> constant in some cases but not others? I don't think the difference
> has anything to do with the view here ...
At least in current sources it would, since it can't push down the clause
(unless I'm misreading subquery_is_pushdown_safe and the comment) through
the distinct on.
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To: pgsql-sql@postgresql.org
Cc: sszabo@megazone23.bigpanda.com, tgl@sss.pgh.pa.us, mendola@bigfoot.com
Subject: Re: Performance inside and outside view ( WAS Re: Select the
In-Reply-To: <20020912081941.L45896-100000@megazone23.bigpanda.com>
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