Re: Sub-optimal plan chosen - Mailing list pgsql-performance

From Robert Haas
Subject Re: Sub-optimal plan chosen
Date
Msg-id 603c8f070909101002s33b4226esdd0fb2601828fc35@mail.gmail.com
Whole thread Raw
In response to Re: Sub-optimal plan chosen  (bricklen <bricklen@gmail.com>)
Responses Re: Sub-optimal plan chosen  (bricklen <bricklen@gmail.com>)
List 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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