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 sorts;
		}
		/**
		 * create all sort conditions in a listing element
		 * 
		 * @param listing
		 *            ListingDesign
		 * @return the sort array
		 */
		protected ArrayList createSorts( ListingDesign listing )
		{
			return createSorts( ( (ListingHandle) listing.getHandle( ) )
					.sortsIterator( ) );
		}
		/**
		 * create sort array by giving GroupHandle
		 * 
		 * @param group
		 *            the GroupHandle
		 * @return the sort array
		 */
		protected ArrayList createSorts( GroupHandle group )
		{
			return createSorts( group.sortsIterator( ) );
		}
		/**
		 * create input parameter binding
		 * 
		 * @param handle
		 * @return