| From: | Gaetano Mendola <mendola(at)bigfoot(dot)com> |
|---|---|
| To: | Timo Nentwig <timo(at)nitwit(dot)de> |
| Subject: | Re: Bug in optimizer |
| Date: | 2004-05-05 17:31:01 |
| Message-ID: | 409924D5.1090001@bigfoot.com |
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| Thread: | |
| Lists: | pgsql-bugs pgsql-performance |
Timo Nentwig wrote:
> This is very slow:
>
> SELECT urls.id FROM urls WHERE
> (
> urls.id <> ALL (SELECT html.urlid FROM html)
> );
>
> ...while this is quite fast:
>
> SELECT urls.id FROM urls WHERE
> (
> NOT (EXISTS (SELECT html.urlid FROM tml WHERE
> (
> html.urlid = urls.id
> )))
> );
Are you using the version 7.4.x ?
Regards
Gaetano Mendola
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