Re: user defined function

Do you mean this function? Seems I cannot get much information from it...
/*
* record_out - output routine for pseudo-type RECORD.
*/
Datum
record_out(PG_FUNCTION_ARGS)
{
elog(ERROR, "Cannot display a value of type %s", "RECORD");

PG_RETURN_VOID(); /* keep compiler quiet */
}

On 1/24/06, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> Richard Huxton <dev(at)archonet(dot)com> writes:
> > Tom Lane wrote:
> >> You could do that in C, but none of the available PLs support it.
>
> > How would you define the signature for the function? One parameter of
> > type anyelement?
>
> Type RECORD would be a better choice --- ANYELEMENT allows scalar types
> which is not what you want here. (You could probably still do it with
> a function declared that way, but it'd have to take extra steps to
> defend itself against being passed, say, an integer.)
>
> If you're looking for a coding model, stripping down record_out() to
> just count nulls should get you there.
>
> regards, tom lane
>