Re: Serious performance problem

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От Tille, Andreas
Тема Re: Serious performance problem
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Msg-id Pine.LNX.4.33.0110301056320.6117-100000@wr-linux02.rki.ivbb.bund.de
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Ответ на Re: Serious performance problem  (Vsevolod Lobko <seva@sevasoft.kiev.ua>)
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On Mon, 29 Oct 2001, Vsevolod Lobko wrote:

> Seems that problem is very simple :))
> MSSql can do queries from indexes, without using actual table at all.
> Postgresql doesn't.
>
> So mssql avoids sequental scanning of big table, and simply does scan of
> index which is already in needed order and has very much less size.
Hmmm, could anyone imagine a simple or not *solution* of the Problem.
I´m thinking of some switch the database programmer could use if he
really knows what he is doing.

Kind regards
       Andreas.


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