@Override
  public boolean nextKeyValue() {
    if (getQueryResultsIterator().hasNext()) {
      current = getQueryResultsIterator().next();
      return true;
    }
    return false;
  }
Record reader for results for Druid TimeseriesQuery.
druid-handler/src/java/org/apache/hadoop/hive/druid/serde/DruidTimeseriesQueryRecordReader.java