Andreas Seltenreich <seltenreich@gmx.de> writes:
> Tom Lane writes:
>> We've dealt with similar issues in places like pg_relation_size() by
>> making the functions return NULL instead of throwing an error for an
>> unmatched argument OID.
> Note that Michael Paquier sent a patch implementing this in another
> thread:
> https://www.postgresql.org/message-id/CAB7nPqTxF5dtxjEzB7xkJvOWxX8D_2atxmTu3PSnkhcWT_JY5A@mail.gmail.com
Ah, I had a feeling that this had come up recently, but failed to remember
that there was already a patch. Maybe we should just bump up the priority
of reviewing that patch.
regards, tom lane