Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> writes:
> You could make INNER_VAR -1 and so on. Then it would probably break
> quite clearly if it's not signedness clean.
I kinda like this, because it'd avoid having random large constants
in the code.
We'd have to change Var.varno and some other places from Index to
plain int, or else invent a typedef --- but the number of places
currently using plain int for this sort of purpose is very large,
so probably a new typedef is not worth the hassle.
regards, tom lane