"Lee Wu" <Lwu@mxlogic.com> writes:
> We have table is database which cannot be displayed by
> either \d, or \dt or pg_class.
> But we can select, DML on it.
You could not possibly be selecting from it if it's not in pg_class.
I expect this is pilot error on your part, but there's not enough info
here to guess just what. Could you show exact examples of a successful
select, the other inquiries you tried, and exactly what you got from
them?
regards, tom lane