private void createSortOrderForUpdateDelete(List<ExprNodeDesc> sortCols,
                                              StringBuilder sortOrder, StringBuilder nullSortOrder) {
    NullOrdering defaultNullOrder = NullOrdering.defaultNullOrder(conf);
    for (int i = 0; i < sortCols.size(); i++) {
      sortOrder.append(DirectionUtils.codeToSign(DirectionUtils.ASCENDING_CODE));
      nullSortOrder.append(defaultNullOrder.getSign());
    }
  }
@param totalFiles
         the totalFiles to set
ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java