#34840: Django 4.2 casts text fields when testing IS NULL, preventing use of
partial indexes
-------------------------------------+-------------------------------------
     Reporter:  Alex Vandiver        |                    Owner:  murtatah
         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 Florian Apolloner):

 Regarding my comment
 https://code.djangoproject.com/ticket/34840#comment:11 -- The validation
 error is wrong there, it is actually a database area that is masked
 (https://github.com/django/django/pull/15659#pullrequestreview-1629960210).
 I wonder if we could teach the ORM to only add casts when using bind
 params, there is no reason to add those for column refs. That is unless
 our testsuite doesn't miss some further important edge cases :)

 At the very least we will need instructions (release notes, maybe a blog
 post) for people on how to check whether they are affected and how to fix
 it.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/34840#comment:15>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.

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