Bug 200144 Exception occurs when nested table share the parent table's result set.[0005]
Description: Exception occurs when nested table share the parent table's result set.[0005] Build number: 2.2.1.v20070816-0630 Steps to reproduce: 1, New a table1 with one binding 2, Insert another table into table1 and share the table1's resultset 3, Preview Actual result: Exception occurs when preview Error log: org.eclipse.birt.report.service.api.ReportServiceException: Error happened while running the report; nested exception is: java.lang.IllegalStateException: forward reference dataset org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder$QueryBuilderVisitor.createQuery(ReportQueryBuilder.java:912) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder$QueryBuilderVisitor.visitTableItem(ReportQueryBuilder.java:609) org.eclipse.birt.report.engine.ir.TableItemDesign.accept(TableItemDesign.java:44) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder.build(ReportQueryBuilder.java:246) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder$QueryBuilderVisitor.visitCell(ReportQueryBuilder.java:806) org.eclipse.birt.report.engine.ir.CellDesign.accept(CellDesign.java:156) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder.build(ReportQueryBuilder.java:246) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder$QueryBuilderVisitor.visitRow(ReportQueryBuilder.java:792) org.eclipse.birt.report.engine.ir.RowDesign.accept(RowDesign.java:100) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder.build(ReportQueryBuilder.java:246) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder$QueryBuilderVisitor.handleListingBand(ReportQueryBuilder.java:705) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder$QueryBuilderVisitor.visitTableItem(ReportQueryBuilder.java:641) org.eclipse.birt.report.engine.ir.TableItemDesign.accept(TableItemDesign.java:44) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder.build(ReportQueryBuilder.java:246) org.eclipse.birt.report.engine.data.dte.ReportQueryBuilder.build(ReportQueryBuilder.java:228) org.eclipse.birt.report.engine.data.dte.AbstractDataEngine.prepare(AbstractDataEngine.java:136) org.eclipse.birt.report.engine.executor.ReportExecutor.execute(ReportExecutor.java:94) org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportExecutor.execute(WrappedReportExecutor.java:59) org.eclipse.birt.report.engine.internal.executor.dup.SuppressDuplciateReportExecutor.execute(SuppressDuplciateReportExecutor.java:50) org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportExecutor.execute(WrappedReportExecutor.java:59) org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.doRun(RunAndRenderTask.java:138)
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/QueryResults.java
* 
	 * @param odiIterator
	 * @return
	 * @throws DataException
	 */
	private boolean isDummyQuery(org.eclipse.birt.data.engine.odi.IResultIterator odiIterator) throws DataException {
		return queryService.getQueryDefn() instanceof IQueryDefinition
				&& ((IQueryDefinition) queryService.getQueryDefn())
						.getDataSetName() == null && odiIterator.getResultClass().getFieldCount() == 0;
	}
	
	/*
	 * Closes all query result set(s) associated with this object; provides a
	 * hint to the query that it can safely release all associated resources.
	 * The query results might have iterators open on them. Iterators associated
	 * with the query result sets are invalidated and can no longer be used.
	 * 
	 * @see org.eclipse.birt.data.engine.api.IQueryResults#close()
	 */
	public void close( ) throws BirtException
	{
		if ( this.queryService == null )
		{
			
			return;
		}
		if ( iterator != null )
		{
			iterator.close( );
			iterator = null;