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From: Josh Berkus <josh@agliodbs.com>
Reply-To: josh@agliodbs.com
Organization: Aglio Database Solutions
To: Itai Zukerman <zukerman@math-hat.com>
Subject: Re: count(*), EXISTS, indexes
Date: Fri, 11 Apr 2003 14:42:48 -0700
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Itai,

>   # explain select sum(weight) from rprofile rp where exists (select 1 fr=
om=20
rcount_prof rcp where rcp.profile ~<=3D rp.profile and ~rcp.psig ~<=3D rp.p=
sig=20
and rcp.filter=3D'{734,1944}');

I'm not familiar with the "~" that you have in the query.  What are those f=
or?

Do you have an index on rcp.profile, rcp.psig, rcp.filter?

--=20
-Josh Berkus
 Aglio Database Solutions
 San Francisco