@ConstantFunction(name = "bitShiftLeft", argTypes = {SMALLINT, BIGINT}, returnType = SMALLINT)
    public static ConstantOperator bitShiftLeftSmallInt(ConstantOperator first, ConstantOperator second) {
        return ConstantOperator.createSmallInt((short) (first.getSmallint() << second.getBigint()));
    }
@Test
    public void bitShiftLeftSmallInt() {
        assertEquals(80, ScalarOperatorFunctions.bitShiftLeftSmallInt(O_SI_10, O_BI_3).getSmallint());
    }