Function func_signature_string

src/backend/parser/parse_func.c:2084–2090

* func_signature_string * As above, but function name is passed as a qualified name list. */

 *		As above, but function name is passed as a qualified name list.
 */
const char *
func_signature_string(List *funcname, int nargs,
					  List *argnames, const Oid *argtypes)
{
	return funcname_signature_string(NameListToString(funcname),
									 nargs, argnames, argtypes);
}

/*
 * LookupFuncNameInternal