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
Utility.setSystemHelp( getControl( ),
				IHelpConstants.CONEXT_ID_DATASET_JDBC );
	}
	/**
	 * create page control for sql edit page
	 * 
	 * @param parent
	 * @return
	 */
	private Control createPageControl( Composite parent )
	{
		SashForm SashForm = new SashForm( parent, SWT.HORIZONTAL );
		SashForm.setLayoutData( new GridData( GridData.FILL_BOTH ) );
		initialImage( );
		initialJdbcInfo( );
		createTableSelectionComposite( SashForm );
		createTextualQueryComposite( SashForm );
		setSashFormWeights( SashForm );
		return SashForm;
	}
	
	/**
	 * Initialize image property
	 * 
	 */
	private void initialImage( )
	{
		tableImage = JFaceResources.getImage( TABLE_ICON );
		viewImage = JFaceResources.getImage( VIEW_ICON );