NHibernate HQL Group by entity

Is it possible to execute a query like this in HQL without specifying all the column names.

select med, MAX(med.PrescriptionLines.Prescription.PrescriptionDate)
    from Medication med
    where med.Patient.PatientId = :patientId
    group by med

      

        
        
        
      

    

This request extends all properties of the Medication object in the select, but in the group only extends med to be med.MedicationId. I don't want to list all properties of the drug object in the group by clause. Is there a way to do this?

I tried to replace the med group with the med group. * or group {med. *} but it doesn work.

Any ideas?