| From: | Alexandra Wang <alexandra(dot)wang(dot)oss(at)gmail(dot)com> |
|---|---|
| To: | jian he <jian(dot)universality(at)gmail(dot)com> |
| Cc: | pgsql-hackers(at)lists(dot)postgresql(dot)org, Tomas Vondra <tomas(at)vondra(dot)me>, Andrei Lepikhov <lepihov(at)gmail(dot)com>, Corey Huinker <corey(dot)huinker(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, hs(at)cybertec(dot)at, Jeff Davis <pgsql(at)j-davis(dot)com> |
| Subject: | Re: Is there value in having optimizer stats for joins/foreignkeys? |
| Date: | 2026-05-14 23:13:26 |
| Message-ID: | CAK98qZ3_4nPQ4DYXG_2QAD-A-BfmWs2psJ9N_HQ9rSDZb0HF3A@mail.gmail.com |
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| Lists: | pgsql-hackers |
Patch needed a rebase, so here's v5.
I've dropped the changes to catversion.h so hopefully I won't need to
rebase too often. Sorry about the noise!
While I was at it, I also addressed the issues Jian mentioned -- all
minor fixes in parse_utilcmd.c (a one-line detection fix for the ALTER
COLUMN error, an error guard for whole-row variables, and rewording
"equijoin" to "equality join"). Other than that, there are no major
changes in v5 compared to v2-v4. At this stage I'd really appreciate
feedback on the overall design approach.
Best,
Alex
--
Alexandra Wang
EDB: https://www.enterprisedb.com
| Attachment | Content-Type | Size |
|---|---|---|
| v5-0001-Add-join-MCV-statistics-for-selectivity-estimatio.patch | application/octet-stream | 219.3 KB |
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