| From: | Alexander Korotkov <akorotkov(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Don't constrain self-join removal due to PHVs |
| Date: | 2023-12-24 23:33:56 |
| Message-ID: | E1rHXym-00Bl71-8z@gemulon.postgresql.org |
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| Lists: | pgsql-committers |
Don't constrain self-join removal due to PHVs
Self-join removal appears to be safe to apply with placeholder variables
as long as we handle PlaceHolderVar in replace_varno_walker() and replace
relid in phinfo->ph_lateral.
Discussion: https://postgr.es/m/18187-831da249cbd2ff8e%40postgresql.org
Author: Richard Guo
Reviewed-by: Andrei Lepikhov
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/b5fb6736ed3b6875e2a4ca39d33325147f535137
Modified Files
--------------
src/backend/optimizer/plan/analyzejoins.c | 18 ++++----------
src/test/regress/expected/join.out | 39 ++++++++++++++++++++++---------
src/test/regress/sql/join.sql | 10 +++++---
3 files changed, 39 insertions(+), 28 deletions(-)
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