PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
> Effectively if FEELS like the check for an schema/extension
> "owning/belonging to" a schema/extension is failing.
> In this case, the schema DOES NOT EXIST. And the create if not exists
> FAILS! (Which feels like an edge case.
This is an intentional change to close a security hole: it is unsafe for
an extension script to use CREATE IF NOT EXISTS this way. (What if
a hostile attacker created the schema? Now you are depending on a
schema that the attacker has ownership privileges on.) Drop the
IF NOT EXISTS clause, if you're expecting the extension to create the
schema.
regards, tom lane