From: Tom Lane <tgl@sss.pgh.pa.us>
To: Dave Johansen <davejohansen@gmail.com>
Cc: pgsql-performance <pgsql-performance@postgresql.org>
Subject: Re: MAX() and multi-column index on a partitioned table?
Date: Fri, 22 May 2015 21:13:50 -0400
Message-ID: <21054.1432343630@sss.pgh.pa.us> (raw)
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Dave Johansen <davejohansen@gmail.com> writes:
> On Fri, May 22, 2015 at 3:42 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> What PG version are you using? 9.1 or newer should know how to do this
>> with a merge append of several indexscans.
> Sorry, I should have mentioned that in the original email. I'm using 8.4.20
> on RHEL 6. From your reply, it sounds like this is the expected behavior
> for 8.4 and 9.0. Is that the case?
Yeah, pre-9.1 is not very bright about that. You could factor the query
manually, perhaps, though it's surely a pain in the neck.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, davejohansen@gmail.com
Subject: Re: MAX() and multi-column index on a partitioned table?
In-Reply-To: <21054.1432343630@sss.pgh.pa.us>
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