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From: Heikki Linnakangas <heikki@enterprisedb.com>
To: Anton <anton200@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: partitioned table and ORDER BY indexed_field DESC LIMIT 1
Date: Sat, 27 Oct 2007 10:11:32 +0100
Message-ID: <472300C4.70800@enterprisedb.com> (raw)
In-Reply-To: <8cac8dd0710270153v5d6a6dfar1850597750bf17e2@mail.gmail.com>
References: <46CEB522.9030907@enterprisedb.com>
	<C2F454A1.3CA32%llonergan@greenplum.com>
	<8cac8dd0710262126t147f8974rb58a1e7c615e0725@mail.gmail.com>
	<8491.1193463449@sss.pgh.pa.us>
	<8cac8dd0710270153v5d6a6dfar1850597750bf17e2@mail.gmail.com>

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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