Re: US Telephone Number Type

"Karen Hill" <karen_hill22@yahoo.com> writes:
> I did a quick google and someone mentioned that input and output
> functions need to be written in C.  Is that still the case?

Yeah, pretty much.  The main problem is that such functions need to deal
with whatever physical on-disk format you've chosen for the datatype,
and most of our PLs don't offer bit-level memory access.

If C functions seem like more work than you want to go to for this
problem, I concur with using a domain over text with a regex check
constraint ...

            regards, tom lane