Horton

Re: [PATCHES] GIN improvements

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: Jeff Davis <pgsql@j-davis.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Teodor Sigaev <teodor@sigaev.ru>, Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>, Pgsql Hackers <pgsql-hackers@postgresql.org>
Date: 2009-02-04T19:40:03Z
Lists: pgsql-hackers 
On Wed, Feb 4, 2009 at 1:39 PM, Jeff Davis <pgsql@j-davis.com> wrote:
> On Mon, 2009-02-02 at 20:38 -0500, Tom Lane wrote:
>> Also, I really think it's a pretty bad idea to make index cost
>> estimation depend on the current state of the index's pending list
>> --- that state seems far too transient to base plan choices on.
>
> I'm confused by this. Don't we want to base the plan choice on the most
> current data, even if it is transient?
>
> Regards,
>        Jeff Davis

Well, there's nothing to force that plan to be invalidated when the
state of the pending list changes, is there?

...Robert