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[3.1.x] Fixed #31965 -- Adjusted multi-table fast-deletion on MySQL/MariaDB.

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The optimization introduced in 7acef095d7 did not properly handle
deletion involving filters against aggregate annotations.

It initially was surfaced by a MariaDB test failure but misattributed
to an undocumented change in behavior that resulted in the systemic
generation of poorly performing database queries in 5b83bae031.

Thanks Anton Plotkin for the report.

Refs #23576.

Backport of f6405c0b8e from master
This commit is contained in:
Simon Charette
2020-08-30 03:00:15 -04:00
committed by Mariusz Felisiak
parent 655e1ce6b1
commit 2986ec031d
5 changed files with 35 additions and 11 deletions
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2
tests/delete/models.py
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@@ -141,7 +141,7 @@ class Base(models.Model):
class RelToBase(models.Model):
base = models.ForeignKey(Base, models.DO_NOTHING)
base = models.ForeignKey(Base, models.DO_NOTHING, related_name='rels')
class Origin(models.Model):