Ruckusing_Adapter_Sqlite3_Base::identifier PHP Method

    public function identifier($string)
    {
        return '"' . $string . '"';
    }

 /**
  * @return string
  */
 private function keys()
 {
     if (count($this->_primary_keys) > 0) {
         $lead = ' PRIMARY KEY (';
         $quoted = array();
         foreach ($this->_primary_keys as $key) {
             $quoted[] = sprintf("%s", $this->_adapter->identifier($key));
         }
         $primary_key_sql = ",\n" . $lead . implode(",", $quoted) . ")";
         return $primary_key_sql;
     } else {
         return '';
     }
 }