Subject: Re: question on UPDATE TABLE
From: Wei Weng <wweng@kencast.com>
To: pgsql-sql@postgresql.org
In-Reply-To: <20020823124920.H23447-100000@megazone23.bigpanda.com>
References: <20020823124920.H23447-100000@megazone23.bigpanda.com>
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Date: 23 Aug 2002 15:56:56 -0400
Message-Id: <1030132646.29122.10.camel@Monet>
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Thanks a lot! It works. :)

On Fri, 2002-08-23 at 15:51, Stephan Szabo wrote:
> On 23 Aug 2002, Wei Weng wrote:
> 
> > I have this query
> >
> > UPDATE ONLY ContentSummaries
> > SET AccessID = '685d96de-1d09-11b2-beec-0001031d54ce'
> > FROM Categories AS cat, ContentTypes AS ct, ContentSummaries AS cs LEFT
> > OUTER JOIN Publishers AS pb ON (pb.PublisherID = cs.PublisherID)
> > WHERE cs.CreationDate IS NOT NULL AND cat.CategoryID = cs.CategoryID AND
> > ct.ContentTypeID = cs.ContentTypeID AND cat.CategoryID =
> > '391b11d0-1d09-11b2-a312-0001031d54ce'
> 
> You do realize you're getting two copies of ContentSummaries in this
> update and only one is actually being constrained afaics (and it's not the
> one being updated).  Perhaps something like
> cs.ContentTypeID=ContentSummaries.ContentTypeID or something like that
> in the where clause?
> 
> 
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-- 
Wei Weng
Network Software Engineer
KenCast Inc.