pgsql: ATTACH PARTITION: Don't match a PK with a UNIQUE constraint

From: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: ATTACH PARTITION: Don't match a PK with a UNIQUE constraint
Date: 2024-04-15 13:08:44
Message-ID: E1rwM4h-0029qR-PS@gemulon.postgresql.org
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ATTACH PARTITION: Don't match a PK with a UNIQUE constraint

When matching constraints in AttachPartitionEnsureIndexes() we weren't
testing the constraint type, which could make a UNIQUE key lacking a
not-null constraint incorrectly satisfy a primary key requirement. Fix
this by testing that the constraint types match. (Other possible
mismatches are verified by comparing index properties.)

Discussion: https://postgr.es/m/202402051447.wimb4xmtiiyb@alvherre.pgsql

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/cee8db3f680b737b64d747530b48d30828cf4790

Modified Files
--------------
src/backend/commands/tablecmds.c | 5 +++++
src/backend/utils/cache/lsyscache.c | 22 ++++++++++++++++++++++
src/include/utils/lsyscache.h | 2 ++
src/test/regress/expected/constraints.out | 16 ++++++++++++++++
src/test/regress/sql/constraints.sql | 7 +++++++
5 files changed, 52 insertions(+)

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