decimal operators annotations

DecimalOperators.java

    @ScalarOperator(ADD)
    @SqlType("decimal(min(38, p + 1), s)")
    public static long addShortShortShort(@SqlType("decimal(p,s)") long a, @SqlType("decimal(p,s)") long b)
    {
        return a + b;
    }

    @ScalarOperator(ADD)
    @SqlType("decimal(min(38, p + 1), s)")
    public static Slice addShortShortLong(@SqlType("decimal(p,s)") long a, @SqlType("decimal(p,s)") long b)
    {
        BigInteger aBigInteger = BigInteger.valueOf(a);
        BigInteger bBigInteger = BigInteger.valueOf(b);
        BigInteger result = aBigInteger.add(bBigInteger);
        return LongDecimalType.unscaledValueToSlice(result);
    }

    @ScalarOperator(ADD)
    @SqlType("decimal(min(38, p + 1), s)")
    public static Slice addLongLongLong(@SqlType("decimal(p,s)") Slice a, @SqlType("decimal(p,s)") Slice b)
    {
        BigInteger aBigInteger = LongDecimalType.unscaledValueToBigInteger(a);
        BigInteger bBigInteger = LongDecimalType.unscaledValueToBigInteger(b);
        BigInteger result = aBigInteger.add(bBigInteger);
        checkOverflow(result);
        return LongDecimalType.unscaledValueToSlice(result);
    }