Robert Treat <xzilla@users.sourceforge.net> writes:
> If I am understanding this correctly, they could only be displayed if selected
> explicitly right?
That's always been true. The behavior at the level of SQL commands
wouldn't change. The question is whether any apps out there examine
pg_attribute and expect these rows to be present. Most of the code
I've seen that examines pg_attribute explicitly disregards rows with
attnum < 0 ...
regards, tom lane