Re: partitioned table and ORDER BY indexed_field DESC LIMIT 1

From: "Luke Lonergan" <LLonergan(at)greenplum(dot)com>
To: "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com>, "Anton" <anton200(at)gmail(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: partitioned table and ORDER BY indexed_field DESC LIMIT 1
Date: 2007-10-27 19:12:06
Message-ID: C3E62232E3BCF24CBA20D72BFDCB6BF8044A24A1@MI8NYCMAIL08.Mi8.com
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And I repeat - 'we fixed that and submitted a patch' - you can find it in the unapplied patches queue.

The patch isn't ready for application, but someone can quickly implement it I'd expect.

- Luke

Msg is shrt cuz m on ma treo

-----Original Message-----
From: Heikki Linnakangas [mailto:heikki(at)enterprisedb(dot)com]
Sent: Saturday, October 27, 2007 05:20 AM Eastern Standard Time
To: Anton
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: [PERFORM] partitioned table and ORDER BY indexed_field DESC LIMIT 1

Anton wrote:
> I repost here my original question "Why it no uses indexes?" (on
> partitioned table and ORDER BY indexed_field DESC LIMIT 1), if you
> mean that you miss this discussion.

As I said back then:

The planner isn't smart enough to push the "ORDER BY ... LIMIT ..."
below the append node.

--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com

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