From: | Richard Broersma Jr <rabroersma(at)yahoo(dot)com> |
---|---|
To: | "John D(dot) Burger" <john(at)mitre(dot)org>, PostgreSQL General <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Lifting WHERE conditions out of inner select |
Date: | 2007-10-08 20:09:29 |
Message-ID: | 94231.54546.qm@web31810.mail.mud.yahoo.com |
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Lists: | pgsql-general |
--- "John D. Burger" <john(at)mitre(dot)org> wrote:
> My question is, should the planner have figured this out, and we're
> just losing out because we're stuck in 7.4? Or is there some subtle
> difference in semantics I'm missing? The select results were the
> same in both cases, but I'm willing to believe that's an accident of
> our data.
I don't know if this helps.
SELECT lemma
FROM word AS W
INNER JOIN sense AS S
ON W.wordid = S.wordid
INNER JOIN semlinkref AS R
ON R.synset1id = S.synsetid
AND R.synset2id = S.synsetid
INNER JOIN synset AS T
ON S1.synsetid = T.synsetid
WHERE W.lemma = 'scramble'
AND R.linked = 1
AND R.pos='v'
ORDER BY lemma;
Regards,
Richard Broersma Jr.
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