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
}
		HashMap query2ResultMetaData = report.getResultMetaData( );
		if ( null != query2ResultMetaData )
		{
			metaData = (ResultMetaData) query2ResultMetaData.get( query );
		}
		return metaData;
	}
	private IResultIterator getResultSetIterator( DataRequestSession dataSession,
			DataSetID dataSet, Scriptable scope ) throws BirtException
	{
		DataSetID parent = dataSet.getParentID( );
		if ( parent == null )
		{
			String rsetName = dataSet.getDataSetName( );
			assert rsetName != null;
			IQueryResults rset = dataSession.getQueryResults( rsetName );
			return rset.getResultIterator( );
		}
		else
		{
			IResultIterator iter = getResultSetIterator( dataSession, parent, scope );
			long rowId = dataSet.getRowID( );
			String queryName = dataSet.getQueryName( );
			assert rowId != -1;
			assert queryName != null;
			iter.moveTo( (int) rowId );
			return iter.getSecondaryIterator( queryName, scope );
		}
	}