felix(at)crowfix(dot)com writes:
> I am pretty certain no such SQL command exists. But is it possible to
> do something sneaky to the internal tables so that two names point to
> the same columnand everything just works?
No ... at least not for usefully large values of "work".
You might be able to do something involving a view that renames the
column in question, with as-yet-unconverted clients made to reference
the view. Offhand I'm not convinced that's easier than just fixing the
clients though ...
regards, tom lane