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/src/org/eclipse/birt/report/engine/data/dte/ReportQueryBuilder.java
return createSubQuery( item, parentQuery );
			}
			
			
			QueryDefinition query = new QueryDefinition( parentQuery );
			query.setDataSetName( dsHandle.getQualifiedName( ) );
			
			query.getInputParamBindings().addAll( 
					createParamBindings( designHandle.paramBindingsIterator( ) ));
			
			
			query.setMaxRows( maxRows );
			Iterator iter = designHandle.columnBindingsIterator( );
			while ( iter.hasNext( ) )
			{
				ComputedColumnHandle binding = (ComputedColumnHandle) iter.next( );
				addColumBinding( query, binding );
			}
			
			addSortAndFilter( item, query );
			
			return query;
		}
		protected BaseQueryDefinition createSubQuery( ReportItemDesign item, BaseQueryDefinition parentQuery )
		{
			BaseQueryDefinition query = null;
			
			if ( parentQuery == null )
			{