| 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 |
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| Lists: | pgsql-hackers |
On Fri, Mar 06, 2020 at 01:15:56AM +0100, Tomas Vondra wrote:
>Hi,
>
>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.
regards
--
Tomas Vondra http://www.2ndQuadrant.com
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 |
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