@Override
 public void cancel() throws TranslatorException {
   LogManager.logDetail(
       LogConstants.CTX_CONNECTOR,
       SpreadsheetExecutionFactory.UTIL.getString("cancel_query")); // $NON-NLS-1$
   this.rowIterator = null;
 }
 @Override
 public void close() {
   LogManager.logDetail(
       LogConstants.CTX_CONNECTOR,
       SpreadsheetExecutionFactory.UTIL.getString("close_query")); // $NON-NLS-1$
 }