presto-spi/src/main/java/io/prestosql/spi/type/UnscaledDecimal128Arithmetic.java/UnscaledDecimal128Arithmetic/incrementUnsafe
class UnscaledDecimal128Arithmetic:    public static void incrementUnsafe(Slice decimal)
    {
        long low = getLong(decimal, 0);
        if (low != ALL_BITS_SET_64) {
            setRawLong(decimal, 0, low + 1);
            return;
        }

        long high = getLong(decimal, 1);
        setNegativeLong(decimal, high + 1, isNegative(decimal));
    }