public Map<String, Object> getValue() {
    if (compacted) {
      throw new UnsupportedOperationException(
          "compacted DruidWritable does not support getValue(), use getCompactedValue()");
    }
    return value;
  }
list of values in a compacted form, Serializer/Deserializer needs to agree on the order of values.
This is only used when the result is compacted.
druid-handler/src/java/org/apache/hadoop/hive/druid/serde/DruidWritable.java