Re: Collect frequency statistics for arrays

Excerpts from Tom Lane's message of jue mar 01 18:51:38 -0300 2012:
> 
> Alvaro Herrera <alvherre@commandprompt.com> writes:
> > Excerpts from Robert Haas's message of jue mar 01 12:00:08 -0300 2012:
> >> On Wed, Feb 29, 2012 at 5:43 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> >> I confess I am nervous about ripping this out.  I am pretty sure we
> >> will get complaints about it.  Performance optimizations that benefit
> >> group A at the expense of group B are always iffy, and I'm not sure
> >> the case of using an array as a path indicator is as uncommon as you
> >> seem to think.
> 
> > Maybe we should keep it as an option.
> 
> How would we make it optional?  There's noplace I can think of to stick
> such a knob ...

Uhm, attoptions?

"alter table foo alter column bar set extended_array_stats to on"
or something like that?

-- 
Álvaro Herrera <alvherre@commandprompt.com>
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