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
instanceId = InstanceID.parse( displayName.substring( 11 ) );
		}
		else
		{
			resultSetName = displayName;
			instanceId = null;
		}
		selectedColumns = null;
	}
	public List getMetaData( ) throws EngineException
	{
		return getResultSetList( );
	}
	public List getResultSetList( ) throws EngineException
	{
		prepareMetaData( );
		if ( instanceId != null )
		{
			ArrayList rsetList = new ArrayList( );
			String rsetName = instanceId2RsetName( instanceId );
			if ( rsetName != null )
			{
				IResultMetaData metaData = getResultMetaData( rsetName );
				if ( metaData != null )
				{
					rsetList.add( new ResultSetItem( rsetName, metaData ) );
				}
			}
			else
			{