Horton

Re: multivariate statistics v14

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: David Steele <david@pgmasters.net>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>, Tatsuo Ishii <ishii@postgresql.org>, Tom Lane <tgl@sss.pgh.pa.us>, Álvaro Herrera <alvherre@2ndquadrant.com>, Petr Jelinek <petr@2ndquadrant.com>, Jeff Janes <jeff.janes@gmail.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2016-04-08T15:55:52Z
Lists: pgsql-hackers 
On Tue, Mar 29, 2016 at 11:18 AM, David Steele <david@pgmasters.net> wrote:
> On 3/28/16 4:42 AM, Tomas Vondra wrote:
>> Yes, those are valid omissions. I plan to address them, and I'd also
>> considering adding a section to 65.1 (How the Planner Uses Statistics),
>> explaining more thoroughly how the planner uses multivariate stats.
>
> It looks you need post a new patch so I have marked this "waiting on
> author".

Since no new version of this patch has been posted in the last 10
days, it seems clear that there will not be time for this to
reasonably become ready for committer and then get committed in the
few hours remaining before the deadline.  That is a bummer, since I
was hoping we would have this feature in this release, but hopefully
we will get it into 9.7.  I am marking it Returned with Feedback.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

Commits

  1. Collect and use multi-column dependency stats

  2. Implement SortSupport for macaddr data type

  3. Implement multivariate n-distinct coefficients

  4. Generate fmgr prototypes automatically