@Override
  public int hashCode() {
    int hashCode = 1;

    hashCode = hashCode * 8191 + ((isSetLowValue()) ? 131071 : 524287);
    if (isSetLowValue())
      hashCode = hashCode * 8191 + lowValue.hashCode();

    hashCode = hashCode * 8191 + ((isSetHighValue()) ? 131071 : 524287);
    if (isSetHighValue())
      hashCode = hashCode * 8191 + highValue.hashCode();

    hashCode = hashCode * 8191 + org.apache.thrift.TBaseHelper.hashCode(numNulls);

    hashCode = hashCode * 8191 + org.apache.thrift.TBaseHelper.hashCode(numDVs);

    hashCode = hashCode * 8191 + ((isSetBitVectors()) ? 131071 : 524287);
    if (isSetBitVectors())
      hashCode = hashCode * 8191 + bitVectors.hashCode();

    hashCode = hashCode * 8191 + ((isSetHistogram()) ? 131071 : 524287);
    if (isSetHistogram())
      hashCode = hashCode * 8191 + histogram.hashCode();

    return hashCode;
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/TimestampColumnStatsData.java