Re: Sub-optimal plan chosen

From: bricklen <bricklen(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Sub-optimal plan chosen
Date: 2009-09-10 17:07:16
Message-ID: 33b743250909101007w9971c0bvba679957d4ef49d@mail.gmail.com
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On Thu, Sep 10, 2009 at 10:02 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:

> On Thu, Sep 10, 2009 at 12:56 PM, bricklen <bricklen(at)gmail(dot)com> wrote:
> > On Thu, Sep 10, 2009 at 8:43 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >>
> >> bricklen <bricklen(at)gmail(dot)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.
>
>
Ah, sorry, missed that.

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