#31584: Queryset crashes when grouping by Exists() on Oracle.
     Reporter:  felixxm              |                    Owner:  felixxm
         Type:  Bug                  |                   Status:  closed
    Component:  Database layer       |                  Version:  3.0
  (models, ORM)                      |
     Severity:  Release blocker      |               Resolution:  fixed
     Keywords:  oracle exists        |             Triage Stage:  Ready for
  boolean                            |  checkin
    Has patch:  1                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0

Comment (by Carlton Gibson <carlton.gibson@…>):

 In [changeset:"b46b0f80e81bbf8fcf7e8c20c249c8041db5e227" b46b0f8]:
 #!CommitTicketReference repository=""
 [3.1.x] Fixed #31584 -- Fixed crash when chaining values()/values_list()
 after Exists() annotation and aggregation on Oracle.

 Oracle requires the EXISTS expression to be wrapped in a CASE WHEN in
 the GROUP BY clause.

 Regression in efa1908f662c19038a944129c81462485c4a9fe8.
 Backport of 3a941230c85b2702a5e1cd97e17251ce21057efa from master

Ticket URL: <https://code.djangoproject.com/ticket/31584#comment:5>
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