Soroosh Sardari <soroosh(dot)sardari(at)gmail(dot)com> writes:
> I need to get a Relation instance but I have only a RelFileNode!
Why do you think you need to do that? Such a lookup is inherently the
wrong thing, because relations' relfilenode values are not fixed (unless
you have a lock on the relation, which presumably you don't).
regards, tom lane