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/api/impl/GetParameterDefinitionTask.java
String sortBy = parameter.getSortBy( );
		int limit = parameter.getListlimit( );
		String pattern = parameter.getPattern( );
		return createDynamicSelectionChoices( pattern, dataSetName, labelExpr,
				valueExpr, dataType, limit, fixedOrder, isDistinct,
				sortDirection, sortBy );
	}
	
	private IParameterDefnBase getParamDefnBaseByName( ParameterDefnBase param,
			String name )
	{
		ParameterDefnBase ret = null;
		if ( param instanceof ScalarParameterDefn
				&& name.equals( param.getName( ) ) )
		{
			ret = param;
		}
		else if ( param instanceof ParameterGroupDefn )
		{
			if ( name.equals( param.getName( ) ) )
			{
				ret = param;
			}
			else
			{
				Iterator iter = ( (ParameterGroupDefn) param ).getContents( )
						.iterator( );
				while ( iter.hasNext( ) )
				{
					ParameterDefnBase pBase = (ParameterDefnBase) iter.next( );