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
}
	private boolean isMasterQuery( IQueryDefinition query )
	{
		if ( query.getDataSetName( ) == null )
		{
			return false;
		}
		IBaseQueryDefinition parent = query.getParentQuery( ); 
		while ( parent != null )
		{
			if ( parent instanceof IQueryDefinition )
			{
				IQueryDefinition parentQuery = (IQueryDefinition) parent;
				if ( parentQuery.getDataSetName( ) != null )
				{
					return false;
				}
			}
			else
			{
				return false;
			}
			parent = parent.getParentQuery( );
		}
		return true;
	}
	/**
	 * get the result set name used by the instance.
	 * 
	 * @param iid