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
*            instance id
	 * @return result set name.
	 */
	protected String instanceId2RsetName( InstanceID iid )
	{
		DataID dataId = iid.getDataID( );
		if ( dataId != null )
		{
			DataSetID dataSetId = dataId.getDataSetID( );
			if ( dataSetId != null )
			{
				String rsetId = dataSetId.getDataSetName( );
				if ( rsetId != null )
				{
					return rsetId2Name( rsetId );
				}
			}
		}
		return null;
	}
	
	/**
	 * get the resultset id from the query id.
	 * 
	 * @param id
	 * @return
	 */
	protected String queryId2rsetId( String id )
	{