From: PFC <lists@boutiquenumerique.com>
To: Szűcs Gábor <surrano@gmail.com>
To: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: where+orderby+limit not (always) using appropriate index?
Date: Wed, 18 May 2005 17:06:51 +0200
Message-ID: <op.sqy79pi8th1vuj@localhost> (raw)
In-Reply-To: <428B5179.6060202@gmail.com>
References: <428B5179.6060202@gmail.com>
> SELECT o FROM t WHERE i = 1 ORDER BY o LIMIT 1;
use :
ORDER BY i, o
If you have a multicol index and want to order on it, you should help the
planner by ORDERing BY all of the columns in the index...
It bit me a few times ;)
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To: pgsql-performance@postgresql.org
Cc: lists@boutiquenumerique.com, surrano@gmail.com
Subject: Re: where+orderby+limit not (always) using appropriate index?
In-Reply-To: <op.sqy79pi8th1vuj@localhost>
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