[FLOW3-general] SQL error when using setOrderings() without matching()

[Peter Beernink]

Hi list,

For an application I am working on, I want to display all items in my 
repository ordered by a specific field.
My guess was to just create a findAll() method which had the following code:

$query = $this->createQuery();
return $query->setOrderings(array('lastname' => 
\F3\FLOW3\Persistence\QueryInterface::ORDER_ASCENDING))->execute();

However when I execute this, I get an SQL error: "SQLSTATE[HY000]: General 
error: 1 no such column: d.parent"
When I add a matching, it works correct, so in this case I added a match for 
a required field not to be empty.

Is it a bug that I get the SQL error, or should setOrderings() alway be 
combined with a matching?
I'm currently using alpha7, so if it is a bug, just let me know and I create 
an issue for it.

Greetings,
Peter