Passing NULL to a function called with OidFunctionCall3

[Bborie Park <bkpark@xxxxxxxxxxx>]

Hey all,

I'm trying to make use of OidFunctionCall3 and am wondering how to 
resolve an issue.  I need to be able to pass to the function called with 
OidFunctionCall3 a NULL and am having difficulty figuring out how.

{{{
/* build fcnarg */
for (i = 0; i < set_count; i++) {
	if (_haspixel[i]) {
		fcnarg[i] = Float8GetDatum(_pixel[i]);
		POSTGIS_RT_DEBUGF(4, "arg %d is %f", i, _pixel[i]);
	}
	else {
		fcnarg[i] = (Datum) NULL;
		POSTGIS_RT_DEBUGF(4, "arg %d is NULL", i);
	}
}
datum = OidFunctionCall3(fcnoid, fcnarg[0], fcnarg[1], fcnuserarg);
}}}

The above does not work (segfault).  What is the correct way to pass a 
NULL to the function being called?  Should I be using a different 
function other than OidFunctionCall3?

Thanks,
Bborie
--
Bborie Park
Programmer
Center for Vectorborne Diseases
UC Davis
530-752-8380
bkpark@xxxxxxxxxxx

--
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general