Re: query slow problem

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От frank_lupo
Тема Re: query slow problem
Дата
Msg-id H00QE1$I01haKcNFANMKp4encvwuqwK_F3tEjBV94VVCs8qkAVBW@email.it
обсуждение исходный текст
Ответ на query slow problem  ("frank_lupo" <frank_lupo@email.it>)
Ответы Re: query slow problem  (Stephan Szabo <sszabo@megazone23.bigpanda.com>)
Список pgsql-general
>
> On Mon, 29 Jul 2002, frank_lupo wrote:
>
> > select id,de2 from irtab where id in (select distinct(ruolofunz)
from
> > irelbtes_1 where entpian=118331)\g
>
> In optimizes poorly currently in postgres, so you're generally better
> off converting to EXISTS or subselect in FROM.  Something like
> (untested):
>
> select id, de2 from irtabl where exists (select 1 from
>  irelbtes_1 where entpian=118331 and irtabl.id=ruolofunz)
>
> or
>
> select id, de2 from irtabl, (select distinct(ruolofunz) as r from
> irelbtes_1 where entpian=118331) as i
> where i.r=irtabl.id;
>
>
>
>
>

My problem is not resolved.

Thank

Bye !!
Frank Lupo (Wolf) !!



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