From: Arnaud Lesauvage <thewild@freesurf.fr>
To: Heikki Linnakangas <heikki@enterprisedb.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Index on two columns not used
Date: Wed, 18 Oct 2006 17:05:48 +0200
Message-ID: <453642CC.8070804@freesurf.fr> (raw)
In-Reply-To: <45363F3B.1080109@enterprisedb.com>
References: <45360E25.9010403@freesurf.fr>
<45361295.9050504@enterprisedb.com>
<45361A2D.6080702@freesurf.fr>
<453632C5.50501@enterprisedb.com>
<453636F1.7000903@freesurf.fr>
<45363F3B.1080109@enterprisedb.com>
Heikki Linnakangas a écrit :
> Arnaud Lesauvage wrote:
>> It is quite typical, yes. It is the base query of a view. In fact, most
>> views have a lot more joins (they join with all the upper-level tables).
>> But 150ms is OK, indeed.
>
> If the query using the view does anything more than a "SELECT * FROM
> view", you should do an explain analyze of the query instead of the
> definition of the view. The access plan might look very different.
The views are used as linked tables in an Access Frontend.
Some accesses are "select * from view", others might filter
on a country_id or something similar.
For the moment performance is good, so I think I'll keep a
normalized database as long as it is possible !
Thanks for your help Heikki !
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To: pgsql-performance@postgresql.org
Cc: thewild@freesurf.fr, heikki@enterprisedb.com
Subject: Re: Index on two columns not used
In-Reply-To: <453642CC.8070804@freesurf.fr>
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