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/DataExtractionTask.java
queryId2QueryMapping.put( queryId, query );;
			}
		}
		try
		{
			loadResultSetMetaData( );
		}
		catch ( EngineException e )
		{
			e.printStackTrace( );
		}
		isMetaDataPrepared = true;
	}
	/**
	 * get the query name through query id.
	 * 
	 * @param queryId
	 * @return query name
	 */
	private String getQueryName( String queryId )
	{
		return (String) queryId2NameMapping.get( queryId );
	}
	/**
	 * get the query defintion from the query id
	 * 
	 * @param queryId
	 * @return
	 */
	private IQueryDefinition getQuery( String queryId )