Re: Additional improvements to extended statistics

From: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Additional improvements to extended statistics
Date: 2020-03-06 12:58:00
Message-ID: 20200306125800.wln6p5oltgdiqpxy@development
Views: Raw Message | Whole Thread | Download mbox | Resend email
Lists: pgsql-hackers

On Fri, Mar 06, 2020 at 01:15:56AM +0100, Tomas Vondra wrote:
>Here is a rebased version of this patch series. I've polished the first
>two parts a bit - estimation of OR clauses and (Var op Var) clauses, and
>added a bunch of regression tests to exercise this code. It's not quite
>there yet, but I think it's feasible to get this committed for PG13.
>The last part (extended stats on expressions) is far from complete, and
>it's not feasible to get it into PG13. There's too much missing stuff.

Meh, the last part with stats on expression is not quite right and it
breaks the cputube tester, so here are the first two parts only. I don't
plan to pursue the 0003 part for PG13 anyway, as mentioned.


Tomas Vondra
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Attachment Content-Type Size
0001-Support-using-extended-stats-for-parts-of-O-20200306.patch text/plain 11.3 KB
0002-Support-clauses-of-the-form-Var-op-Var-20200306.patch text/plain 15.9 KB

In response to


Browse pgsql-hackers by date

  From Date Subject
Next Message Julien Rouhaud 2020-03-06 13:15:47 Add an optional timeout clause to isolationtester step.
Previous Message Julien Rouhaud 2020-03-06 12:36:48 Re: reindex concurrently and two toast indexes