#34978: Annotating through an aggregate with RawSQL() raises 1056 "Can't group
on"
on MySQL/MariaDB.
-------------------------------------+-------------------------------------
Reporter: Matthew Somerville | Owner: Simon
| Charette
Type: Bug | Status: assigned
Component: Database layer | Version: 4.2
(models, ORM) |
Severity: Release blocker | 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 Matthew Somerville):
> So in this case play.name is functionally dependant on play.id (as it's
the primary key of play) so if you're using a version of MySQL supported
on Django 4.2 we'd definitely like to learn more about it as it's
unexpected.
So it turns out the database is MariaDB (11.1.2), not MySQL, and MariaDB
does not appear to include/have the functional dependency requirement that
this is based on. I don't know if you'd like me to raise that as a
separate ticket, if Django is supposed to support both entirely equally,
but yes, it looks like the code will not work at all with MariaDB with
ONLY_FULL_GROUP_BY turned on.
--
Ticket URL: <https://code.djangoproject.com/ticket/34978#comment:10>
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