Bug 161191 Null is inserted when drag columns to query text with ctrl key pressed
Description: Null is inserted when drag columns to query text with ctrl key pressed Steps to reproduce: 1. New a data source. 2. New a dataset. 3. Press and hold ctrl key, select OFFICECODE and CITY columns, drag to query text. Expected result: "CLASSICMODELS.OFFICES.OFFICECODE,CLASSICMODELS.OFFICES.CITY" is inserted in query text. Actual result: "null,CLASSICMODELS.OFFICES.OFFICECODE,CLASSICMODELS.OFFICES.CITY" is inserted
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
return ( ( e.stateMask & SWT.CONTROL ) > 0 )
						&& ( ( e.keyCode == 'y' ) || ( e.keyCode == 'Y' ) );
			}
			public void keyReleased( KeyEvent e )
			{
				
			}
		} );
	}
	/**
	 * 
	 * @param viewer
	 */
	private final void attachMenus( SourceViewer viewer )
	{
		StyledText widget = viewer.getTextWidget( );
		TextMenuManager menuManager = new TextMenuManager( viewer );
		widget.setMenu( menuManager.getContextMenu( widget ) );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.datatools.connectivity.oda.design.internal.ui.DataSetWizardPageCore#refresh(org.eclipse.datatools.connectivity.oda.design.DataSetDesign)
	 */
	protected void refresh( DataSetDesign dataSetDesign )
	{
		DEFAULT_MESSAGE = JdbcPlugin.getResourceString( "dataset.editor.page.query" );
		setMessage( DEFAULT_MESSAGE );
		refreshPage( );
		prepareUI( );