public function __construct()
 {
     parent::__construct();
     $this->connections = array();
     $this->command_id = 0;
     $this->sql_histories = new Charcoal_Stack();
 }
 public function __construct()
 {
     parent::__construct();
     $this->connected = false;
     $this->connection = null;
     $this->command_id = 0;
 }
 public function __construct()
 {
     parent::__construct();
     $this->_connected = false;
     $this->_connection = null;
 }