Date: Wed, 20 Jan 2016 16:37:43 -0500
From: Bruce Momjian <bruce@momjian.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>,
 "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Subject: Re: multivariate statistics v8
Message-ID: <20160120213743.GA9092@momjian.us>
References: <543AFA15.4080608@fuzzy.cz> <567AF104.80700@2ndquadrant.com>
 <CA+TgmoZjZT69k9ZcA73kqa4FES8wiJUJSf3hTeCc0YXV5ARpeA@mail.gmail.com>
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On Wed, Jan 20, 2016 at 02:20:38PM -0500, Robert Haas wrote:
> On Wed, Dec 23, 2015 at 2:07 PM, Tomas Vondra
> <tomas.vondra@2ndquadrant.com> wrote:
> >    The remaining question is how unique the statistics name should be.
> >    My initial plan was to make it unique within a table, but that of
> >    course does not work well with the DROP STATISTICS (it'd have to
> >    specify the table name also), and it'd also now work with statistics
> >    on multiple tables (which is one of the reasons for abandoning ALTER
> >    TABLE stuff).
> >
> >    So I think it should be unique across tables. Statistics are hardly
> >    a global object, so it should be unique within a schema. I thought
> >    that simply using the schema of the table would work, but that of
> >    course breaks with multiple tables in different schemas. So the only
> >    solution seems to be explicit schema for statistics.
> 
> That solution seems good to me.
> 
> (with apologies for not having looked at the rest of this much at all)

Woh, this will be an optimizer game-changer, from the user perspective!

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I. As I am, so you will be. +
+ Roman grave inscription                             +


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