From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Laurent Martelli <laurent(at)aopsys(dot)com> |
Cc: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: optimizing select ... not in (select ...) |
Date: | 2001-08-13 15:59:48 |
Message-ID: | 200108131559.f7DFxmS19276@candle.pha.pa.us |
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Thread: | |
Lists: | pgsql-sql |
Can it be redone using NOT EXISTS?
> I have this query :
>
> select distinct on (Pictures.PictureID) * from Pictures where Pictures.PictureID not in (select distinct PictureID from Keywords);
>
> and I find it a bit slow. Does anybody have suggestions to run this
> faster ? (I have indexes on PictureID on both Pictures and Keywords)
>
> --
> Laurent Martelli
> laurent(at)aopsys(dot)com http://www.bearteam.org/~laurent/
>
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--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
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