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Re: Need to increase performance of a query

От: Anne Rosset
Тема: Re: Need to increase performance of a query
Дата: ,
Msg-id: 4C11570F.9050209@collab.net
(см: обсуждение, исходный текст)
Ответ на: Re: Need to increase performance of a query  (Joe Conway)
Список: pgsql-performance

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Need to increase performance of a query  (Anne Rosset, )
 Re: Need to increase performance of a query  (Jesper Krogh, )
  Re: Need to increase performance of a query  (Anne Rosset, )
   Re: Need to increase performance of a query  (Jochen Erwied, )
 Re: Need to increase performance of a query  (hubert depesz lubaczewski, )
 Re: Need to increase performance of a query  (Anne Rosset, )
  Re: Need to increase performance of a query  (Kenneth Marshall, )
   Re: Need to increase performance of a query  (Anne Rosset, )
  Re: Need to increase performance of a query  (Jochen Erwied, )
   Re: Need to increase performance of a query  (Anne Rosset, )
  Re: Need to increase performance of a query  (Craig James, )
   Re: Need to increase performance of a query  (Anne Rosset, )
    Re: Need to increase performance of a query  (Joe Conway, )
     Re: Need to increase performance of a query  (Joe Conway, )
      Re: Need to increase performance of a query  (Anne Rosset, )
       Re: Need to increase performance of a query  (Joe Conway, )
        Re: Need to increase performance of a query  (Anne Rosset, )
   Re: Need to increase performance of a query  (Heikki Linnakangas, )
    Re: Need to increase performance of a query  (Anne Rosset, )
     Re: Need to increase performance of a query  (Heikki Linnakangas, ) 
Joe Conway wrote:
> On 06/10/2010 01:21 PM, Anne Rosset wrote:
>
>>>
>>>
>> I tried that and it didn't make any difference. Same query plan.
>>
>
> A little experimentation suggests this might work:
>
> create index item_rank_project on item_rank(project_id, rank) where
> pf_id IS NULL;
>
> Joe
>
>
Yes it does. Thanks a lot!
Anne

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