@HiveDecimalVersionV2
  public HiveDecimal fractionPortion() {
    HiveDecimal result = new HiveDecimal();
    result.fastFractionPortion();
    return result;
  }
Return a decimal with only the fractional digits.
<p>
Zero is returned when there are no fractional digits (i.e. scale is 0).
storage-api/src/java/org/apache/hadoop/hive/common/type/HiveDecimal.java