Andreas Pflug <pgadmin@pse-consulting.de> writes:
> Maybe my proposal wasn't clear enough:
> Just as an index references a pg_class entry by it's OID, not some value
> identifying it's physical storage, all objects might continue
> referencing columns by attnum.
That's exactly the same thing I am saying. Your mistake is to assume
that this function can be combined with identification of a (changeable)
logical column position. It can't. Changeability and immutability are
just not compatible requirements.
regards, tom lane
