function disconnect()
 {
     parent::disconnect();
     if ($this->db != null) {
         @pg_close($this->db);
         $this->_afterDisconnect();
         return true;
     } else {
         $this->_addError("Not connected to a db!", 'disconnect()');
         return false;
     }
 }
 function disconnect()
 {
     parent::disconnect();
     if ($this->db != null) {
         @sqlite_close($this->db);
         $this->_afterDisconnect();
         return true;
     } else {
         $this->error = "Not connected to a db!";
         return false;
     }
 }
 function disconnect()
 {
     parent::disconnect();
     $this->_afterDisconnect();
     return true;
 }