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To: Richard Huxton <dev@archonet.com>
cc: Peter Koczan <pjkoczan@gmail.com>,
	pgsql-performance <pgsql-performance@postgresql.org>
Subject: Re: sequence query performance issues 
In-reply-to: <46FCB5F3.4080600@archonet.com> 
References: <4544e0330709271504g364fd042u161966fa448934f6@mail.gmail.com>
	<46FCB5F3.4080600@archonet.com>
Comments: In-reply-to Richard Huxton <dev@archonet.com>
	message dated "Fri, 28 Sep 2007 09:06:11 +0100"
Date: Fri, 28 Sep 2007 10:16:19 -0400
Message-ID: <886.1190988979@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
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Richard Huxton <dev@archonet.com> writes:
> Hmm - why is it doing that?

I'm betting that the OP's people.uid column is not an integer.  Existing
PG releases can't use hashed subplans for cross-data-type comparisons
(8.3 will be a bit smarter).

			regards, tom lane