From: Michael Fuhr <mike@fuhr.org>
To: Bo Lorentsen <bl@netgroup.dk>
Cc: Russell Simpkins <russellsimpkins@hotmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Number of rows in a cursor ?
Date: Wed, 24 Aug 2005 07:19:22 -0600
Message-ID: <20050824131921.GA39444@winnie.fuhr.org> (raw)
In-Reply-To: <430C6CFF.9070304@netgroup.dk>
References: <B74B7433CDDD2C4AA41D94832E32E19D92EE9A@EMEXM1112.dir.svc.accenture.com>
<430C4C70.2010005@netgroup.dk>
<BAY103-DAV72BF461390EA073012267B5A80@phx.gbl>
<430C6CFF.9070304@netgroup.dk>
On Wed, Aug 24, 2005 at 02:50:07PM +0200, Bo Lorentsen wrote:
> Russell Simpkins wrote:
> >If you need a count, why not just execute one of the methods to get a
> >count. i.e.e select count(id) ...
>
> The reason why i don't just make a count and then a selection of data
> is performance.
...which is the same reason a cursor doesn't know how many rows it will
fetch until you fetch them all (or MOVE to the end of the cursor,
which fetches the rows internally).
--
Michael Fuhr
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To: pgsql-sql@postgresql.org
Cc: mike@fuhr.org, bl@netgroup.dk, russellsimpkins@hotmail.com
Subject: Re: Number of rows in a cursor ?
In-Reply-To: <20050824131921.GA39444@winnie.fuhr.org>
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