private void cleanTmpFile() {
    resetResultReader();
    SessionState sessionState = getParentSession().getSessionState();
    sessionState.deleteTmpOutputFile();
    sessionState.deleteTmpErrOutputFile();
  }
Reads the temporary results for non-Hive (non-Driver) commands to the
resulting List of strings.
@param nLines number of lines read at once. If it is <= 0, then read all lines.
service/src/java/org/apache/hive/service/cli/operation/HiveCommandOperation.java