Horton

Re: [COMMITTERS] pgsql: Collect and use multi-column dependency stats

David Rowley <david.rowley@2ndquadrant.com>

View thread View on postgr.es
From: David Rowley <david.rowley@2ndquadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Simon Riggs <simon@2ndquadrant.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2017-04-06T01:10:48Z
Lists: pgsql-hackers

Attachments

On 6 April 2017 at 13:05, David Rowley <david.rowley@2ndquadrant.com> wrote:
> I tested with the attached, and it does not seem to hurt planner
> performance executing:

Here's it again, this time with a comment on the
find_relation_from_clauses() function.

-- 
 David Rowley                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

Commits

  1. Reset API of clause_selectivity()

  2. Collect and use multi-column dependency stats

  3. Implement multivariate n-distinct coefficients