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
return rsetName;
			}
		}
		return null;
	}
	/**
	 * get the rset name from the rset id.
	 * 
	 * @param name
	 * @return
	 */
	protected String rsetName2Id( String name )
	{
		return (String) rsetName2IdMapping.get( name );
	}
	public void setInstanceID( InstanceID iid )
	{
		assert iid != null;
		prepareMetaData( );
		instanceId = iid;
		resultSetName = null;
		selectedColumns = null;
	}
	public void selectResultSet( String displayName )
	{
		assert displayName != null;
		prepareMetaData( );
		if (displayName.startsWith( "InstanceId:" ))
		{
			resultSetName = null;