"Nikolay Samokhvalov" <nikolay@samokhvalov.com> writes:
> I remember several cases when people (e.g. me :-) ) were spending some
> time trying to find an error in some pl/pgsql function and the reason
> lied in incorrect work with arrays (i.e. messages like "index is out
> of bounds" and "index cannot be negative number" would help, surely).
Well, if indexes *couldn't* be negative numbers then that might be
helpful, but they can.
regards, tom lane