◆ INPUT_AGG_COMB_STATE

#define INPUT_AGG_COMB_STATE	(	fcinfo,
		state1,
		state2
	)

Value:

  do {  \
    MemoryContext ctx = set_aggregation_context(fcinfo); \
    state1 = PG_ARGISNULL(0) ? NULL : (SkipList *) PG_GETARG_POINTER(0);  \
    state2 = PG_ARGISNULL(1) ? NULL : (SkipList *) PG_GETARG_POINTER(1);  \
    if (state1 == NULL && state2 == NULL)  \
      PG_RETURN_NULL();  \
    unset_aggregation_context(ctx); \
  } while (0)