Bug 182680 Use feature of new Aggregation framework of Data Engine.
DataEngine will implement new aggregation framework in 2.2.0RC0. After the implementation is finished Engine should go ahead to use new column bindings in definition of map/highlight.
engine/org.eclipse.birt.report.engine.tests/test/org/eclipse/birt/report/engine/data/dte/DataEngineTest.java
assertEquals( goldenStr, resultStr );
	}
	public void doTestNestedQGeneration( ) throws Exception
	{
		Report report = getReport( NESTED_DATASET_DESIGN );
		IDataEngine dataEngine = getDataEngine( report, ARCHIVE_PATH,
				ARCHIVE_METANAME, MODE_GENERATION );
		Iterator iter = report.getQueries( ).iterator( );
		String goldenFile = "NestedDataSet.txt";
		String goldenStr = loadResource( goldenFile );
		String resultStr = "";
		
		
		IQueryDefinition childQuery = (IQueryDefinition) iter.next( );
		IQueryDefinition parentQuery = (IQueryDefinition) iter.next( );
		IQueryResultSet parentRSet = null;
		IQueryResultSet childRSet = null;
		parentRSet = (IQueryResultSet) dataEngine.execute( parentQuery );
		while ( parentRSet.next( ) )
		{
			Map parentMap = parentQuery.getResultSetExpressions( );
			Iterator parentIter = parentMap.keySet( ).iterator( );
			while ( parentIter.hasNext( ) )
			{
				String nextPar = (String) parentIter.next( );
				resultStr += parentRSet.getString( nextPar );
			}
			childRSet = (IQueryResultSet) dataEngine
					.execute( parentRSet, childQuery, false );
			while ( childRSet.next( ) )