RE: Large OR query

From: Jeff Eckermann <jeckermann(at)verio(dot)net>
To: "'Zak McGregor'" <zak(at)mighty(dot)co(dot)za>, pgsql-general(at)postgresql(dot)org
Subject: RE: Large OR query
Date: 2001-06-12 13:37:33
Message-ID: 08CD1781F85AD4118E0800A0C9B8580B094AD2@NEZU
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I would load the 1000 values into a temporary table, and join on the ID
field. I usually find that approach gives much faster results.

> -----Original Message-----
> From: Zak McGregor [SMTP:zak(at)mighty(dot)co(dot)za]
> Sent: Tuesday, June 12, 2001 7:42 AM
> To: pgsql-general(at)postgresql(dot)org
> Subject: [GENERAL] Large OR query
>
> Hi all
>
> If I have say 1000 values for an ID field, what is the best way to
> select from a table all the corresponding records?
> I have tried
> select * from blah where id in (id1,id2,id3...id1000)
> and
> select * from blah where id=id1 or id=id2 ... or id=id1000
>
> and both are pretty slow.
> Is there a better way to do this please?
>
> Thanks
>
> Ciao
> --
> Zak McGregor http://www.carfolio.com - Over 7000 car specs online
> Web mercenary - currently for hire. Perl/html/.js/sql/cgi/GNUlinux/php +
> ---------------------------------------------------------------------
> "Trying to make bits uncopyable is like trying to make water not wet.
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> this into account, the sooner people will start making money again."
> -- Bruce Schneier
>
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