Re: BUG #18217: ALTER TABLE IF EXISTS not being honored with DROP CONSTRAINT IF EXISTS

PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
> I found this issue from running pg_restore with flags to clean and "if
> exists". pg_restore returns an error code which is generated from a query
> of the following form:

> ALTER TABLE IF EXISTS ONLY public.foo DROP CONSTRAINT IF EXISTS foo_pkey

This works for me in the current minor release (15.5):

$ psql
psql (15.5)
Type "help" for help.

postgres=# ALTER TABLE IF EXISTS ONLY public.foo DROP CONSTRAINT IF EXISTS foo_pkey;
NOTICE: relation "foo" does not exist, skipping
ALTER TABLE

Please update. If you can still reproduce the problem in the
current release, there must be some additional contributing
factor -- please try to provide a self-contained test case.

regards, tom lane