public QueryInfo getQueryInfo(String handle) {
    synchronized (webuiLock) {
      QueryInfo result = liveQueryInfos.get(handle);
      if (result != null) {
        return result;
      }
      if (historicalQueryInfos == null) {
        return null;
      }
      return historicalQueryInfos.get(handle);
    }
  }
@param handle handle of SQLOperation.
@return display representing a particular SQLOperation.
service/src/java/org/apache/hive/service/cli/operation/QueryInfoCache.java