From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
Subject: | pgsql: Rethink nullingrel marking rules in build_joinrel_tlist(). |
Date: | 2023-02-07 23:26:22 |
Message-ID: | E1pPXLx-00276a-DM@gemulon.postgresql.org |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-committers |
Rethink nullingrel marking rules in build_joinrel_tlist().
The logic for when to add the current outer join's own relid
to the nullingrels sets of output Vars and PHVs was overly
complicated and underly correct. Not sure why I didn't think
of this before, but since what we want is marking per the
syntactic structure, we can just consult our records about
the syntactic structure, ie syn_righthand/syn_lefthand.
Also, tighten the rule about when to add the commute_above_r
bits, in hopes of eliminating some squishy reasoning. I do not
know of a reason to think that that's broken as-is, but this way
seems better.
Per bug #17781 from Robins Tharakan.
Discussion: https://postgr.es/m/17781-c0405c8b3cd5e072@postgresql.org
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/fee7b77b9000f35e445de9954a8cbf241f181e60
Modified Files
--------------
src/backend/optimizer/util/relnode.c | 43 +++++++++++++++++++----------------
src/test/regress/expected/join.out | 44 ++++++++++++++++++++++++++++++++++++
src/test/regress/sql/join.sql | 28 +++++++++++++++++++++++
3 files changed, 96 insertions(+), 19 deletions(-)
From | Date | Subject | |
---|---|---|---|
Next Message | Amit Kapila | 2023-02-08 02:46:37 | pgsql: Fix the logical replication timeout during large DDLs. |
Previous Message | noreply | 2023-02-07 23:09:28 | pgsql: Tag refs/tags/REL_15_2 was created |