Bug 200500 Error happens while share result set from item behind it.[0005]
Description: Error happens while share result set from item behind it. Build number:2.2.1.v20070820 Steps to reproduce: 1. New sample data source and dataset. 2. Drag the dataset to Layout and name it t1. 3. Insert a table before t1 and share result set from t1. 4. Preview. Expected result: If this situation isn't supported by Engine, at least we should provide friendly error message. Actual result: Error happened while running the report. Error log:n/a
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/QueryResults.java
{
	
	private IServiceForQueryResults 	queryService;
	
	
	private DataEngineContext 			context;
	private Scriptable 					queryScope;
	private int 						nestedLevel;
	
	
	private String                      rootQueryResultID;
	private String 						selfQueryResultID;
	private IResultIterator				iterator;
		
	private static Logger logger = Logger.getLogger( QueryResults.class.getName( ) );
	
	/**