@org.apache.thrift.annotation.Nullable
  public java.lang.Object getFieldValue(_Fields field) {
    switch (field) {
    case LOW_VALUE:
      return getLowValue();

    case HIGH_VALUE:
      return getHighValue();

    case NUM_NULLS:
      return getNumNulls();

    case NUM_DVS:
      return getNumDVs();

    case BIT_VECTORS:
      return getBitVectors();

    case HISTOGRAM:
      return getHistogram();

    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field histogram 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/DoubleColumnStatsData.java