@org.apache.thrift.annotation.Nullable
    public static _Fields findByThriftId(int fieldId) {
      switch(fieldId) {
        case 1: // BOOLEAN_STATS
          return BOOLEAN_STATS;
        case 2: // LONG_STATS
          return LONG_STATS;
        case 3: // DOUBLE_STATS
          return DOUBLE_STATS;
        case 4: // STRING_STATS
          return STRING_STATS;
        case 5: // BINARY_STATS
          return BINARY_STATS;
        case 6: // DECIMAL_STATS
          return DECIMAL_STATS;
        case 7: // DATE_STATS
          return DATE_STATS;
        case 8: // TIMESTAMP_STATS
          return TIMESTAMP_STATS;
        default:
          return null;
      }
    }
Find the _Fields constant that matches fieldId, or null if its not found.
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/ColumnStatisticsData.java