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
private DataSetDesign getDataSetDesign( )
	{
		return this.getInitializationDesign( );
	}
	
	/**
	 * populate shema list if the schema is supported
	 *
	 */
	protected void populateSchemaList()
	{
		if ( rootNode != null )
		{
			removeTreeItem( rootNode );
		}
		getAvailableSchema();
		
		if ( schemaCombo.getItemCount() < 1)
		{
			schemaCombo.add( JdbcPlugin.getResourceString("tablepage.text.All") );
			schemaCombo.select( 0 );
			if( schemaList != null){
				Iterator it = schemaList.iterator( );
				while ( it.hasNext( ) )
					schemaCombo.add( it.next( ).toString( ) );
			}
		}
		ArrayList targetSchemaList = new ArrayList();	
		ArrayList schemaObjectList = new ArrayList();
		if(schemaList!=null)