Re: Status of Fix Domain Casting TODO

On Mon, Jan 01, 2007 at 06:30:40PM -0600, Andrew Dunstan wrote:
> Tom Lane wrote:
> > "Jim C. Nasby" <jim(at)nasby(dot)net> writes:
> >> FWIW, I'm running into this trying to create a 'raw' domain that would
> >> automagically convert hex strings into actual binary data for storage in
> >> a bytea.
> >
> > I think you've got 0 chance of implementing that as a domain rather than
> > an independent type. Without or without revisions in the casting rules,
> > a domain has not got its own I/O functions, and never will.
>
>
> This might be less of an issue if we allowed such IO functions to be
> written in a loadable PL rather than in C.

I'm confused... couldn't I just write a cast function? Or is that what's
meant by I/O functions?

And yes, in this case I should be able to accomplish what I'm looking
for just using encode() and decode().
--
Jim Nasby jim(at)nasby(dot)net
EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)