From: Tom Lane <tgl@sss.pgh.pa.us>
To: Hari Warrier <hbhaskaran@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Getting pg to use index on an inherited table (8.1.1)
Date: Tue, 17 Jan 2006 23:07:05 -0500
Message-ID: <4296.1137557225@sss.pgh.pa.us> (raw)
In-Reply-To: <43CDB628.3030007@gmail.com>
References: <43CDB628.3030007@gmail.com>
Hari Warrier <hbhaskaran@gmail.com> writes:
> A query on foobar2 (child table) uses the index, whereas the same query
> via foobar (parent) doesn't.
A query just on foobar should be able to use the index AFAIR. The
problem here is that you have a join, and we are not very good about
situations involving joins against inheritance sets (nor joins against
UNION ALL subqueries, which is really about the same thing).
I'm hoping to get a chance to look into improving this during the 8.2
development cycle.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, hbhaskaran@gmail.com
Subject: Re: Getting pg to use index on an inherited table (8.1.1)
In-Reply-To: <4296.1137557225@sss.pgh.pa.us>
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