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
list.add( binding );
					}
				}
			}
			return list;
		}
		/**
		 * converts interval string values to integer values
		 */
		protected int parseInterval( String interval )
		{
			if ( DesignChoiceConstants.INTERVAL_YEAR.equals( interval ) )
			{
				return IGroupDefinition.YEAR_INTERVAL;
			}
			if ( DesignChoiceConstants.INTERVAL_MONTH.equals( interval ) )
			{
				return IGroupDefinition.MONTH_INTERVAL;
			}
			if ( DesignChoiceConstants.INTERVAL_WEEK.equals( interval ) )  
			{
				return IGroupDefinition.WEEK_INTERVAL;
			}
			if ( DesignChoiceConstants.INTERVAL_QUARTER.equals( interval ) )
			{
				return IGroupDefinition.QUARTER_INTERVAL;
			}
			if ( DesignChoiceConstants.INTERVAL_DAY.equals( interval ) )
			{
				return IGroupDefinition.DAY_INTERVAL;