@HiveDecimalVersionV2
  public HiveDecimal integerPortion() {
    HiveDecimal result = new HiveDecimal();
    result.fastIntegerPortion();
    return result;
  }
Return a decimal with only the integer digits.
<p>
Any fractional digits are removed.  E.g. 2.083 scale 3 returns as 2 scale 0.
storage-api/src/java/org/apache/hadoop/hive/common/type/HiveDecimal.java