#30209: Union with group by don't generate correct Subquery
-------------------------------------+-------------------------------------
Reporter: Nikolas | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: master
(models, ORM) |
Severity: Normal | Resolution:
Keywords: union, group by | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 1
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Simon Charette):
> I'm planning to make this a sub query pushdown as suggested. FYI, this
is my first contribution to the code base, so suggestions and feedback
would be most appreciated.
TKdka, not to discourage you but this is certainly going to be a hard
first contribution as the ORM doesn't have any formalized API to perform
such pushdown yet. If that can provide you any guidance the most similar
code I can think of is in `django.db.models.sql.Query.get_aggregation`.
--
Ticket URL: <https://code.djangoproject.com/ticket/30209#comment:5>
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