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Subject: BUG #19724: ALTER TYPE ... ALTER ATTRIBUTE triggers internal error
 for base type of domain with check
To: pgsql-bugs@lists.postgresql.org
From: PG Bug reporting form <noreply@postgresql.org>
Cc: exclusion@gmail.com
Reply-To: exclusion@gmail.com, pgsql-bugs@lists.postgresql.org
Date: Sat, 26 Sep 2026 13:00:01 +0000
Message-ID: <19724-58468097b5b17d10@postgresql.org>
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The following bug has been logged on the website:

Bug reference:      19724
Logged by:          Alexander Lakhin
Email address:      exclusion@gmail.com
PostgreSQL version: 19beta4
Operating system:   Ubuntu 24.04
Description:       =20

The following script:
CREATE TYPE rt AS (i int);
CREATE DOMAIN dt AS int CHECK ((ROW(value)::rt).i > 0);
ALTER TYPE rt ALTER ATTRIBUTE i TYPE bigint;

triggers an internal
ERROR:  XX000: could not identify relation associated with constraint 16390
LOCATION:  ATPostAlterTypeCleanup, tablecmds.c:16147

Reproduced starting from af20e2d72.