Bug 134988 [regression]Available items in Query didn't change when change data source in Edit Data Set Dialog.
Description: Available items in Query didn't change when change data source in Edit Data Set Dialog. Steps to reproduce: 1. New two different data sources. 2. New a dataset, change data source, view Available Items in Query pane. Expected result: Available Items in Query pane changed according to new Data source. Actual result: Available Items in Query pane kept unchanged.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
btnExternalEditor.addSelectionListener(this);
        }
        
        
        viewer.getTextWidget( ).addKeyListener( new KeyListener( ) {
			public void keyPressed( KeyEvent e )
			{
				if ( isUndoKeyPress( e ) )
				{
					viewer.doOperation( ITextOperationTarget.UNDO );
				}
				else if ( isRedoKeyPress( e ) )
				{
					viewer.doOperation( ITextOperationTarget.REDO );
				}
			}
			private boolean isUndoKeyPress( KeyEvent e )
			{
				 CTRL + z
				return ( ( e.stateMask & SWT.CONTROL ) > 0 )
						&& ( ( e.keyCode == 'z' ) || ( e.keyCode == 'Z' ) );
			}
			private boolean isRedoKeyPress( KeyEvent e )
			{
				 CTRL + y
				return ( ( e.stateMask & SWT.CONTROL ) > 0 )
						&& ( ( e.keyCode == 'y' ) || ( e.keyCode == 'Y' ) );
			}
			public void keyReleased( KeyEvent e )
			{