BUG #15835: Errors altering data type of the column used in partial exclusion constraint

From: PG Bug reporting form <noreply(at)postgresql(dot)org>
To: pgsql-bugs(at)lists(dot)postgresql(dot)org
Cc: ladayaroslav(at)yandex(dot)ru
Subject: BUG #15835: Errors altering data type of the column used in partial exclusion constraint
Date: 2019-06-05 18:18:42
Message-ID: 15835-32d9b7a76c06a7a9@postgresql.org
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The following bug has been logged on the website:

Bug reference: 15835
Logged by: Yaroslav Schekin
Email address: ladayaroslav(at)yandex(dot)ru
PostgreSQL version: 11.3
Operating system: Any
Description:

Executing the below code:

CREATE TABLE t(some_id int);
ALTER TABLE t ADD EXCLUDE USING btree(some_id WITH =) WHERE (some_id IS NOT
NULL);
ALTER TABLE t ALTER COLUMN some_id TYPE bigint;

Produces the following errors (per PostgreSQL version):
9.4.19, 9.5.15, 9.6.13: ERROR: could not open relation with OID 195837
10.8: ERROR: cache lookup failed for relation 630589
11.3, 12beta1: ERROR: relation "t_some_id_excl" already exists

Responses

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