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
{
		DummyResultIterator( IServiceForResultSet rService,
				org.eclipse.birt.data.engine.odi.IResultIterator odiResult,
				Scriptable scope ) throws DataException
		{
			super( rService, new DummyOdiResultIterator( odiResult ), scope );
		}
		
		public boolean next( ) throws DataException
		{
			return this.getOdiResult( ).next( );
		}
		
		public IResultIterator getSecondaryIterator( String subQueryName,
				Scriptable subScope ) throws DataException
		{
			Collection subQueries = this.getQueryResults().getPreparedQuery().getReportQueryDefn().getSubqueries( );
			Iterator subIt = subQueries.iterator( );
			HashMap subQueryMap = new HashMap();
			while ( subIt.hasNext( ) )
			{