code: @Override
  	public boolean next() throws RemoteException {
  		try {
  			return s.next();
  		} catch (RuntimeException e) {
  			rconn.rollback();
  			throw e;
  		}
  	}
docs: Moves to the next record in the result set, by moving to the next record
  in the saved scan.
  
  @see org.vanilladb.core.remote.jdbc.RemoteResultSet#next()