I see, that was indeed my case as my root class is abstract. Maybe that 
should specified too? These are small things but can help a lot to 
understand
strange behaviors.

Il giorno venerdì 5 dicembre 2014 11:36:51 UTC+1, Jàπ (Jasper N. Brouwer) 
ha scritto:
>
> The leaf part isn't the problem, it can filter on parents as well, but not 
> if the parent is an abstract class. 
>
> -- 
> Jasper N. Brouwer 
> (@jaspernbrouwer) 
>
>
> On 5 December 2014 at 11:26:51, Stefano Angaran ([email protected] 
> <javascript:>) wrote: 
> > I was looking at Doctrine SQLWalker code and that was my conclusion too. 
> > 
> > I think I will refactor my query code then. If I change the FROM clause 
> to 
> > look for B items I can make it work without using instance of operator. 
> > 
> > My suggestion is also to better clarify this in the INSTANCE OF operator 
> > documentation stating that it should be used only to search for leaf 
> > entities, what you think? 
>
>
>

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