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
availableDbObjectsTree.removeAll();
	}
	
	/**
	 *  Gets the list of schema objects 
	 */
	private void getAvailableSchema()
	{
		if (isSchemaSupported)
		{
			ResultSet schemas = metaDataProvider.getAllSchema();
			schemaList = createSchemaList( schemas );
		}
	}
	
	protected void populateTableList( String schemaName ,TreeItem schemaTreeItem )
	{
		if(schemaTreeItem!=null)
		{
			removeTreeItem( schemaTreeItem );
		}
		String namePattern = null;
		String[] tableType = null;
		cachedSearchTxt = searchTxt.getText();	
		namePattern = getTailoredSearchText( searchTxt.getText() );
		  
		String dbtype = getSelectedDbType( );
		cachedDbType = dbtype;
		if ( dbtype != null )
		{