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
DataRequestSession dteSession = getDataSession();
				
				dataEngine.defineDataSet(dataSet);
				ScriptExpression labelExpr = null;
				if ( labelStmt != null && labelStmt.length( ) > 0 )
				{
					labelExpr = new ScriptExpression( labelStmt );
				}
				ScriptExpression valueExpr = new ScriptExpression( valueStmt );
				QueryDefinition queryDefn = new QueryDefinition( );
				queryDefn.setDataSetName( dataSetName );
				if( limit > 0)
				{
					queryDefn.setMaxRows( limit );
				}
				
				Iterator paramIter = dataSet.paramBindingsIterator( );
				while ( paramIter.hasNext( ) )
				{
					ParamBindingHandle binding = (ParamBindingHandle) paramIter
							.next( );
					String paramName = binding.getParamName( );
					String paramExpr = binding.getExpression( );
					queryDefn.getInputParamBindings( ).add(
							new InputParameterBinding( paramName,
									new ScriptExpression( paramExpr ) ) );
				}
				
				String labelColumnName = LABEL_PREFIX;;
				String valueColumnName = VALUE_PREFIX;;