Can I have a where clause in a badge Value expression?

I was hoping this would work for the value expression for a badge:
«COUNT RecallPurchases WHERE RecallPurchases.dateFulfilled IS UNDEFINED»

But it does not. Should it?

Thanks
Bruce

«COUNT Charges WHERE ( Charges.ps_Job.ID = Job.ID)» works for me, v8.8

Thank you sir. (darn parenthesis!)