From: Tom Lane <tgl@sss.pgh.pa.us>
To: Gavin Hamill <gdh@laterooms.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Slow query - possible bug?
Date: Thu, 13 Apr 2006 11:26:50 -0400
Message-ID: <20329.1144942010@sss.pgh.pa.us> (raw)
In-Reply-To: <443E4C9D.3090301@laterooms.com>
References: <443E3DF5.4020207@laterooms.com>
<3c1395330604130546g6b091f75x511955817fe65dcd@mail.gmail.com>
<443E4C9D.3090301@laterooms.com>
Gavin Hamill <gdh@laterooms.com> writes:
> If I replace the
> (allocation0_."Date" between '2006-06-09 00:00:00.000000' and
> '2006-06-09 00:00:00.000000')
> with
> allocation0_."Date" ='2006-04-09 00:00:00.000000'
> then the query comes back in a few milliseconds (as I'd expect :)
Could we see EXPLAIN ANALYZE for
* both forms of the date condition, with the roomid condition;
* both forms of the date condition, WITHOUT the roomid condition;
* just the roomid condition
I'm thinking the planner is misestimating something, but it's hard
to tell what without breaking it down.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, gdh@laterooms.com
Subject: Re: Slow query - possible bug?
In-Reply-To: <20329.1144942010@sss.pgh.pa.us>
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