private static void addTimeStampStats(ColumnStatisticsData statistics, Map<String, Object> result) {
    if (statistics.getTimestampStats().isSetLowValue()) {
      result.put(COLUMN_MIN, ShowUtils.convertToString(statistics.getTimestampStats().getLowValue()));
    }
    if (statistics.getTimestampStats().isSetHighValue()) {
      result.put(COLUMN_MAX, ShowUtils.convertToString(statistics.getTimestampStats().getHighValue()));
    }
    if (statistics.getTimestampStats().isSetNumNulls()) {
      result.put(COLUMN_NUM_NULLS, statistics.getTimestampStats().getNumNulls());
    }
    if (statistics.getTimestampStats().isSetNumDVs()) {
      result.put(COLUMN_DISTINCT_COUNT, statistics.getTimestampStats().getNumDVs());
    }
  }
Formats DESC TABLE results to json format.
ql/src/java/org/apache/hadoop/hive/ql/ddl/table/info/desc/formatter/JsonDescTableFormatter.java