pgsql: Match RelOptInfos by relids not pointer equality. - Mailing list pgsql-committers

Match RelOptInfos by relids not pointer equality.

Commit 1c2cb2744 added some code that tried to detect whether two
RelOptInfos were the "same" rel by pointer comparison; but it turns
out that inheritance_planner breaks that, through its shenanigans
with copying some relations forward into new subproblems.  Compare
relid sets instead.  Add a regression test case to exercise this
area.

Problem reported by Rushabh Lathia; diagnosis and fix by Amit Langote,
modified a bit by me.

Discussion: https://postgr.es/m/CAGPqQf3anJGj65bqAQ9edDr8gF7qig6_avRgwMT9MsZ19COUPw@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/11e22e486d8da6cef4d954c6f2952097df276fa7

Modified Files
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src/backend/partitioning/partprune.c          |  2 +-
src/test/regress/expected/partition_prune.out | 79 +++++++++++++++++++++++++++
src/test/regress/sql/partition_prune.sql      |  6 ++
3 files changed, 86 insertions(+), 1 deletion(-)