public List<String> readOperationLog(boolean isFetchFirst, long maxRows)
      throws SQLException {
    LogFile lf = (isShortLogs) ? testLogFile : logFile;
    return lf.read(isFetchFirst, maxRows);
  }
Read operation execution logs from log file
@param isFetchFirst true if the Enum FetchOrientation value is Fetch_First
@param maxRows the max number of fetched lines from log
@return
@throws java.sql.SQLException
ql/src/java/org/apache/hadoop/hive/ql/session/OperationLog.java