From: Ragnar <gnari@hive.is>
To: Daniel Caune <daniel.caune@ubisoft.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: CREATE INDEX with order clause
Date: Fri, 03 Feb 2006 09:27:11 +0000
Message-ID: <1138958832.18918.49.camel@localhost.localdomain> (raw)
In-Reply-To: <1E293D3FF63A3740B10AD5AAD88535D20171B758@UBIMAIL1.ubisoft.org>
References: <1E293D3FF63A3740B10AD5AAD88535D20171B758@UBIMAIL1.ubisoft.org>
On Wed, 2006-02-01 at 10:46 -0500, Daniel Caune wrote:
> Hi,
>
[snip need for reverse-sort operator class]
>
> SELECT GAME_CLIENT_VERSION
> FROM GSLOG_EVENT
> WHERE PLAYER_USERNAME = ?
> AND EVENT_NAME = ?
> AND EVENT_DATE_CREATED < ?
> ORDER BY EVENT_DATE_CREATED DESC
> LIMIT 1
>
>
> Actually, I¢m not sure that is useful; perhaps PostgreSQL handles
> pretty well such query using an index such as:
> CREATE INDEX IDX_GSLOG_EVENT_PLAYER_EVENT_TIME_DESC
> ON GSLOG_EVENT(PLAYER_USERNAME,
> EVENT_NAME,
> EVENT_DATE_CREATED);
>
>
> Any idea?
does index work with:
SELECT GAME_CLIENT_VERSION
FROM GSLOG_EVENT
WHERE PLAYER_USERNAME = ?
AND EVENT_NAME = ?
AND EVENT_DATE_CREATED < ?
ORDER BY PLAYER_USERNAM DESC,
EVENT_NAME DESC,
EVENT_DATE_CREATED DESC
LIMIT 1
gnari
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To: pgsql-sql@postgresql.org
Cc: gnari@hive.is, daniel.caune@ubisoft.com
Subject: Re: CREATE INDEX with order clause
In-Reply-To: <1138958832.18918.49.camel@localhost.localdomain>
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