Re: Sub-optimal plan chosen
От | Robert Haas |
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Тема | Re: Sub-optimal plan chosen |
Дата | |
Msg-id | 603c8f070909101002s33b4226esdd0fb2601828fc35@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Sub-optimal plan chosen (bricklen <bricklen@gmail.com>) |
Ответы |
Re: Sub-optimal plan chosen
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Список | pgsql-performance |
On Thu, Sep 10, 2009 at 12:56 PM, bricklen <bricklen@gmail.com> wrote: > On Thu, Sep 10, 2009 at 8:43 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote: >> >> bricklen <bricklen@gmail.com> writes: >> > Is there any other data I can provide to shed some light on this? >> >> The table and index definitions? >> >> The straight indexscan would probably win if the index column order >> were ofid, date instead of date, ofid. I can't tell if you have >> any other queries for which the existing column order is preferable, >> though. >> >> regards, tom lane > > > Changing the order of the WHERE predicates didn't help. He's talking about the index definition, not the WHERE clause. The order of the WHERE clause is totally irrelevant. ...Robert
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