mirrors/django
1
0
Fork 0
mirror of https://github.com/django/django.git synced 2025-06-03 18:49:12 +00:00
Code Issues 32 Releases Wiki Activity

[5.0.x] Fixed #34978, Refs #31331 -- Added backward incompatibility note about raw aggregations on MySQL.

Browse Source 
Thanks Matthew Somerville for the report.

Backport of a652f0759651dd7103ed04336ef85dc410f680c1 from main
This commit is contained in:
Mariusz Felisiak 2023-11-27 11:49:24 +01:00 committed by Natalia
parent d9ba8fa397
commit cbd1e913ef
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
docs/releases/4.2.txt
View File

@ -409,6 +409,16 @@ fields modified in the custom ``save()`` methods should be added to the
``update_fields`` keyword argument before calling ``super()``. See ``update_fields`` keyword argument before calling ``super()``. See
:ref:`overriding-model-methods` for more details. :ref:`overriding-model-methods` for more details.
Dropped support for raw aggregations on MySQL
---------------------------------------------
MySQL 8+ allows functional dependencies on ``GROUP BY`` columns, so the
pre-Django 4.2 workaround of grouping by primary keys of the main table is
removed. As a consequence, using ``RawSQL()`` aggregations is no longer
supported on MySQL as there is no way to determine if such aggregations are
needed or valid in the ``GROUP BY`` clause. Use :ref:`aggregation-functions`
instead.
Miscellaneous Miscellaneous
------------- -------------