Sorting foundset by related column still not supported??

Can you confirm that sorting by a related column is not supported?

As it is possible to show a related column in a report, we found strange that trying to sort the report by this column results in getting an empty foundset.

Please confirm if it would be supported once or never, thus forcing to use sql queries or stored calculations.

Related posts:
http://forum.servoy.com/viewtopic.php?t=4934
http://forum.servoy.com/viewtopic.php?t=5315

Servoy does not yet support inner and outer joins, so for a related sort an normal join is used, which means that records on both sides must exist.