Function getSubscriptingRoutines

src/backend/utils/cache/lsyscache.c:3730–3740

* getSubscriptingRoutines * * Given the type OID, fetch the type's subscripting methods struct. * Return NULL if type is not subscriptable. * * If typelemp isn't NULL, we also store the type's typelem value there. * This saves some callers an extra catalog lookup. */

 * This saves some callers an extra catalog lookup.
 */
const struct SubscriptRoutines *
getSubscriptingRoutines(Oid typid, Oid *typelemp)
{
	RegProcedure typsubscript = get_typsubscript(typid, typelemp);

	if (!OidIsValid(typsubscript))
		return NULL;

	return (const struct SubscriptRoutines *)
		DatumGetPointer(OidFunctionCall0(typsubscript));
}


/*				---------- STATISTICS CACHE ----------					 */