code: protected function buildRecord()/*# : array */
      {
          $res = [];
          foreach ($this->clause_records as $tbl) {
              $res[] = $this->quote($tbl) . '.*';
          }
          if (!empty($res)) {
              return [join(', ', $res)];
          } else {
              return [];
          }
      }
docs: Build table to delete
  
  @return array
  @access protected