#28731: Passing an empty Q() to a When inside a Case causes an OperationError
-------------------------------------+-------------------------------------
     Reporter:  Tom van Bussel       |                    Owner:  Tim
                                     |  Martin
         Type:  Bug                  |                   Status:  assigned
    Component:  Database layer       |                  Version:  1.11
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:  Accepted
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------

Comment (by Tomer Chachamu):

 If the usage of `Q()` is deprecated and will be removed then there's no
 need for it to create valid SQL (in more situations than it does
 currently). We could add tests for the existing behaviour of `Q() &
 Q(value=1)` and of `Q() | Q(value=1)`.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/28731#comment:11>
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