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
}
	/**
	* @param item A tree Item which has to be tested
	* @return if the TreeItem represents a Schema node
	*/
	protected boolean isSchemaNode( TreeItem item )
	{
		if ( item != null && isSchemaSupported )
		{
			if (item.getParentItem() == rootNode)
			{
				return true;
			}
		}
		return false;
	}
	
	private void refreshPage() 
	{
		
		DataSourceDesign curDataSourceDesign = this.getDataSetDesign( )
				.getDataSourceDesign( );
		
		if( curDataSourceDesign != prevDataSourceDesign )
		{
			RemoveAllAvailableDbObjects();
			resetJdbcInfo(curDataSourceDesign);
			enableSchemaComponent( isSchemaSupported );
			setRootElement();
            sourceViewerConfiguration.getContentAssistProcessor().setDataSourceHandle(curDataSourceDesign);