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From: Bricklen Anderson <BAnderson@PresiNET.com>
To: Yves Vindevogel <yves.vindevogel@implements.be>
Cc: pgsql-performance@postgresql.org
Subject: Re: Limit clause not using index
Date: Tue, 21 Jun 2005 07:40:34 -0700
Message-ID: <42B826E2.5080802@PresiNET.com> (raw)
In-Reply-To: <d0da86521cd54473cac40df63bb14546@implements.be>
References: <d0da86521cd54473cac40df63bb14546@implements.be>

Yves Vindevogel wrote:
> Hi, 
> 
> rvponp=# explain select * from tblprintjobs order by loginuser,
> desceventdate, desceventtime offset 25 limit 25 ;
>
> I have a very simple query on a big table.  When I issue a "limit"
> and/or "offset" clause, the query is not using the index. 
> Can anyone explain me this ? 

Do you have an index on (loginuser,desceventdate,desceventtime)?

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