DataSetUIUtil.updateColumnCache( handle );
DataSetUIUtil.updateColumnCacheAfterCleanRs( handle );
	public void run( )	{		if ( Policy.TRACING_ACTIONS )		{			System.out.println( "Refresh action >> Refresh " + getSourceViewer( ) ); //$NON-NLS-1$		}		if ( isEnabled( ) )		{			DataSetHandle handle = (DataSetHandle) getSelectedObjects( ).getFirstElement( );			try			{				DataSetUIUtil.updateColumnCache( handle );			}			catch ( SemanticException e )			{				ExceptionHandler.handle( e );			}			getSourceViewer( ).refresh( handle );		}	}