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
{
							IDataQueryDefinition referenceQuery = queries[i];
							if ( referenceQuery instanceof BaseQueryDefinition )
							{
								( (BaseQueryDefinition) referenceQuery )
										.setCacheQueryResults( true );
							}
						}
						if ( (BaseQueryDefinition) queries[0] instanceof BaseQueryDefinition )
						{
							return (BaseQueryDefinition) queries[0];
						}
					}
					else
					{
						
						
						throw new IllegalStateException(
								"forward reference dataset" );
					}
				}
			}
			
			BaseQueryDefinition parentQuery = null;
			if ( value instanceof BaseQueryDefinition )
			{
				parentQuery = (BaseQueryDefinition)value;
			}
			if ( ! ( handle instanceof ReportItemHandle ) )
			{