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 Tree availableDbObjectsTree = null;
    private IMetaDataProvider metaDataProvider = null;
    private JdbcSQLSourceViewerConfiguration sourceViewerConfiguration = null;
	
	private Image schemaImage, tableImage, viewImage, 
		    dataBaseImage, columnImage;
	
	
	protected ArrayList schemaList;
	
	 
	protected ArrayList tableList;
	
	private ComboViewer filterComboViewer = null;
	private Combo schemaCombo = null;
	private Label schemaLabel = null;
	Connection jdbcConnection = null;
	boolean validConnection = false;
	private Button identifierQuoteStringCheckBox = null; 
	private static String TABLE_ICON = "org.eclipse.birt.report.data.oda.jdbc.ui.editors.SQLDataSetEditorPage.TableIcon";
	private static String VIEW_ICON = "org.eclipse.birt.report.data.oda.jdbc.ui.editors.SQLDataSetEditorPage.ViewIcon";
	private static String PAGE_ICON = "org.eclipse.birt.report.data.oda.jdbc.ui.editors.SQLDataSetEditorPage.PageIcon";
	private static String SCHEMA_ICON = "org.eclipse.birt.report.data.oda.jdbc.ui.editors.SQLDataSetEditorPage.SchemaIcon";
	private static String DATABASE_ICON = "org.eclipse.birt.report.data.oda.jdbc.ui.editors.SQLDataSetEditorPage.DbIcon";
	private static String COLUMN_ICON = "org.eclipse.birt.report.data.oda.jdbc.ui.editors.SQLDataSetEditorPage.ColumnIcon";
	
	private String cachedSearchTxt = "";
	private String cachedDbType = "";
	private int cachedSchemaComboIndex = -1;
	private DataSourceDesign prevDataSourceDesign;