The following bug has been logged on the website:
Bug reference: 15546
Logged by: Stefan Kadow
Email address: git17(at)ska67(dot)de
PostgreSQL version: 9.6.10
Operating system: Debian 9.6 (Stretch)
Description:
Documentation describes:
ALTER LARGE OBJECT large_object_oid OWNER TO { new_owner | CURRENT_USER |
SESSION_USER }
You must be superuser or owner of the large object to use ALTER LARGE
OBJECT.
If you want to use this statement for assigning a "new owner", you have to
be a superuser.
If you are only the owner of the large object, you receive an error message
Postgresql-Error 42501 saying that you must be in the role of the "new
owner".