Horton

BUG #18449: Altering column type fails when an SQL routine depends on the column

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From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: exclusion@gmail.com
Date: 2024-04-27T04:00:01Z
Lists: pgsql-bugs 
The following bug has been logged on the website:

Bug reference:      18449
Logged by:          Alexander Lakhin
Email address:      exclusion@gmail.com
PostgreSQL version: 16.2
Operating system:   Ubuntu 22.04
Description:        

The following script:
CREATE TABLE t(a int, b varchar);
CREATE FUNCTION f(i int) RETURNS text LANGUAGE SQL
RETURN (SELECT b FROM t WHERE a = $1);

ALTER TABLE t ALTER COLUMN b TYPE text;
fails with:
ERROR:  unexpected object depending on column: function f(integer)

on REL_14_STABLE .. master since e717a9a18.

Commits

  1. Throw a more on-point error for publications depending on columns.

  2. Throw a more on-point error for functions depending on columns.