Re: Optimizing NOT IN plans / verify rewrite

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От Kevin Grittner
Тема Re: Optimizing NOT IN plans / verify rewrite
Дата
Msg-id 4C56F11B020000250003412A@gw.wicourts.gov
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Ответ на Re: Optimizing NOT IN plans / verify rewrite  ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>)
Список pgsql-performance
"Kevin Grittner" <Kevin.Grittner@wicourts.gov> wrote:

> DELETE FROM foo
>   where foo.b in (
>     select b from foo WHERE type = 'o'
>     except SELECT b FROM bar
>     except SELECT b FROM foo where type <> 'o');

Oops.  Maybe before I get excited I should try it with a query which
is actually logically equivalent.  :-(

-Kevin

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