Re: Getting the type Oid in a CREATE TYPE output function .. - Mailing list pgsql-hackers

Weslee Bilodeau <weslee.bilodeau@hypermediasystems.com> writes:
> I'm trying to create a few new types, and based on the type in/out
> functions will operate a bit differently.
> For the input function finding the type Oid is easy -
>   Oid our_type_oid = PG_GETARG_OID(1);
> For output though I'm having difficulty finding out the type Oid.

You can't, and if you could, relying on it would be a security hole
in your function (somebody could invoke the function manually and pass
it a false OID value).  You have to put everything you need to know
right into the Datum.
        regards, tom lane