code: def load_results_from_table_definition(table_definition, table_definition_file, options):
      
      default_columns = extract_columns_from_table_definition_file(table_definition, table_definition_file)
      columns_relevant_for_diff = _get_columns_relevant_for_diff(default_columns)
  
      results = []
      for tag in table_definition:
          if tag.tag == 'result':
              columns = extract_columns_from_table_definition_file(tag, table_definition_file) or default_columns
              run_set_id = tag.get('id')
              for resultsFile in get_file_list_from_result_tag(tag, table_definition_file):
                  results.append(parallel.submit(
                      load_result, resultsFile, options, run_set_id, columns, columns_relevant_for_diff))
  
          elif tag.tag == 'union':
              results.append(parallel.submit(
                  handle_union_tag, tag, table_definition_file, options, default_columns, columns_relevant_for_diff))
  
      return [future.result() for future in results]
docs: Load all results in files that are listed in the given table-definition file.
      @return: a list of RunSetResult objects