"Russell Black" <russell(dot)black(at)iarchives(dot)com> writes:
> I'd be happy with something which was just plain case-insensitive.
> Given that, I would imagine it would be much less than 100 lines of C code,
> and could probably be done in plpgsql.
You'll still have to get your hands dirty with C. AFAIK there isn't any
way to define I/O functions for new datatypes in any of the PL languages
we have.
regards, tom lane