Re: FW: Simple join optimized badly?

От: Mark Kirkwood
Тема: Re: FW: Simple join optimized badly?
Дата: ,
Msg-id: 452E11FB.7070704@paradise.net.nz
(см: обсуждение, исходный текст)
Ответ на: FW: Simple join optimized badly?  ("H.J. Sanders")
Ответы: Re: FW: Simple join optimized badly?  ("Jim C. Nasby")
Список: pgsql-performance

Скрыть дерево обсуждения

FW: Simple join optimized badly?  ("H.J. Sanders", )
 Re: FW: Simple join optimized badly?  (Mark Kirkwood, )
  Re: FW: Simple join optimized badly?  ("Jim C. Nasby", )
   Re: FW: Simple join optimized badly?  (Tom Lane, )
    Re: FW: Simple join optimized badly?  ("Jim C. Nasby", )
     Re: FW: Simple join optimized badly?  (Mark Kirkwood, )
    Re: FW: Simple join optimized badly?  (Scott Marlowe, )
    Re: FW: Simple join optimized badly?  (Mark Kirkwood, )

H.J. Sanders wrote:

>  why not just like in some other (commercial) databases:
>
>  a statement to say: use index ............
>
>  I know this is against all though but if even the big ones can not resist
>  the pressure of their users, why not?
>

Yeah - some could not (e.g. Oracle), but some did (e.g. DB2), and it
seemed (to me anyway) significant DB2's optimizer worked much better
than Oracle's last time I used both of them (Oracle 8/9 and DB2 7/8).

cheers

Mark


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