From: Stephan Szabo <sszabo@megazone.bigpanda.com>
To: Josh Berkus <josh@agliodbs.com>
Cc: pgsql-performance@postgresql.org
Cc: J@planeti.biz
Subject: Re: Multiple Order By Criteria
Date: Tue, 17 Jan 2006 14:40:36 -0800 (PST)
Message-ID: <20060117143952.D47156@megazone.bigpanda.com> (raw)
In-Reply-To: <200601171425.38772.josh@agliodbs.com>
References: <05c301c61bb1$d88c6a00$681e140a@fatchubby>
<200601171425.38772.josh@agliodbs.com>
On Tue, 17 Jan 2006, Josh Berkus wrote:
> J,
>
> > I have an index built for each of these columns in my order by clause.
> > This query takes an unacceptable amount of time to execute. Here are the
> > results of the explain:
>
> You need a single index which has all five columns, in order.
I think he'll also need a reverse opclass for the first column in the
index or for the others since he's doing desc, asc, asc, asc, asc.
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To: pgsql-performance@postgresql.org
Cc: sszabo@megazone.bigpanda.com, josh@agliodbs.com, J@planeti.biz
Subject: Re: Multiple Order By Criteria
In-Reply-To: <20060117143952.D47156@megazone.bigpanda.com>
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