@ConstantFunction(name = "bitand", argTypes = {SMALLINT, SMALLINT}, returnType = SMALLINT)
    public static ConstantOperator bitandSmallInt(ConstantOperator first, ConstantOperator second) {
        return ConstantOperator.createSmallInt((short) (first.getSmallint() & second.getSmallint()));
    }
@Test
    public void bitandSmallInt() {
        assertEquals(10, ScalarOperatorFunctions.bitandSmallInt(O_SI_10, O_SI_10).getSmallint());
    }