@ConstantFunction(name = "add", argTypes = {LARGEINT, LARGEINT}, returnType = LARGEINT, isMonotonic = true)
    public static ConstantOperator addLargeInt(ConstantOperator first, ConstantOperator second) {
        return ConstantOperator.createLargeInt(first.getLargeInt().add(second.getLargeInt()));
    }
@Test
    public void addLargeInt() {
        assertEquals("200",
                ScalarOperatorFunctions.addLargeInt(O_LI_100, O_LI_100).getLargeInt().toString());
    }