Horton

BUG #18541: Reattaching a partition referenced by a foreign key fails with an error

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From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: exclusion@gmail.com
Date: 2024-07-15T10:00:01Z
Lists: pgsql-bugs 
The following bug has been logged on the website:

Bug reference:      18541
Logged by:          Alexander Lakhin
Email address:      exclusion@gmail.com
PostgreSQL version: 17beta2
Operating system:   Ubuntu 22.04
Description:        

The following script:
CREATE TABLE t1 (a int, PRIMARY KEY (a));
CREATE TABLE t (a int, PRIMARY KEY (a), FOREIGN KEY (a) REFERENCES t1)
PARTITION BY LIST (a);
ALTER TABLE t ATTACH PARTITION t1 FOR VALUES IN (1);
ALTER TABLE t DETACH PARTITION t1;
ALTER TABLE t ATTACH PARTITION t1 FOR VALUES IN (1);

ends up with the error complaining about check triggers:
ERROR:  XX000: could not find ON INSERT check triggers of foreign key
constraint 16400
LOCATION:  GetForeignKeyCheckTriggers, tablecmds.c:11260

Reproduced on REL_15_STABLE (starting from f4566345c) .. master.

Commits

  1. Restructure foreign key handling code for ATTACH/DETACH

  2. Refuse ATTACH of a table referenced by a foreign key