Robert Haas <robertmhaas@gmail.com> writes:
> What exactly do you mean by a SubOID? I'm not really following that part.
I assume he's talking about the object reference representation used in
pg_depend, which is actually class OID + object OID + sub-object ID.
The only object type that has sub-objects at the moment is tables,
wherein the sub-objects are columns and the sub-object IDs are column
numbers. The sub-object ID is zero for all other cases.
regards, tom lane