Horton

Re: Collect frequency statistics for arrays

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Alvaro Herrera <alvherre@commandprompt.com>
Cc: Robert Haas <robertmhaas@gmail.com>, Nathan Boley <npboley@gmail.com>, Alexander Korotkov <aekorotkov@gmail.com>, Noah Misch <noah@leadboat.com>, Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2012-03-01T22:44:58Z
Lists: pgsql-hackers 
Alvaro Herrera <alvherre@commandprompt.com> writes:
> Excerpts from Tom Lane's message of jue mar 01 18:51:38 -0300 2012:
>> How would we make it optional?  There's noplace I can think of to stick
>> such a knob ...

> Uhm, attoptions?

Oh, I had forgotten we had that mechanism already.  Yeah, that might
work.  I'm a bit tempted to design the option setting so that you can
select whether to keep the btree stats, the new stats, or both or
neither --- after all, there are probably plenty of databases where
nobody cares about the array-containment operators either.

That leaves the question of which setting should be the default ...

			regards, tom lane