From: Bruce Momjian <bruce@momjian.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: multivariate statistics v8
Date: Wed, 20 Jan 2016 16:37:43 -0500
Message-ID: <20160120213743.GA9092@momjian.us> (raw)
In-Reply-To: <CA+TgmoZjZT69k9ZcA73kqa4FES8wiJUJSf3hTeCc0YXV5ARpeA@mail.gmail.com>
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. +
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To: pgsql-hackers@postgresql.org
Cc: bruce@momjian.us, robertmhaas@gmail.com, tomas.vondra@2ndquadrant.com
Subject: Re: multivariate statistics v8
In-Reply-To: <20160120213743.GA9092@momjian.us>
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