#35336: Adding GeneratedField fails with ProgrammingError when using When on
CharField
-------------------------------------+-------------------------------------
     Reporter:  Adrian Garcia        |                    Owner:  Simon
                                     |  Charette
         Type:  Bug                  |                   Status:  closed
    Component:  Database layer       |                  Version:  5.0
  (models, ORM)                      |
     Severity:  Release blocker      |               Resolution:  fixed
     Keywords:  postgres,            |             Triage Stage:  Ready for
  generatedfield, contains           |  checkin
    Has patch:  1                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------
Comment (by Sarah Boyce <42296566+sarahboyce@…>):

 In [changeset:"5d95a1c35ef1375a7badcb217c36c5974d1e57ee" 5d95a1c]:
 {{{#!CommitTicketReference repository=""
 revision="5d95a1c35ef1375a7badcb217c36c5974d1e57ee"
 [5.0.x] Refs #35194 -- Adjusted a generated field test to work on Postgres
 15.6+.

 Postgres >= 12.18, 13.14, 14.11, 15.6, 16.2 changed the way the
 immutability
 of generated and default expressions is detected in
 postgres/postgres@743ddaf.

 The adjusted test semantic is presereved by switching from __icontains to
 __contains as both make use of a `%` literal which requires proper
 escaping.

 Refs #35336.

 Thanks bcail for the report.

 Backport of 73b62a21265c4a417004d64d13a896469e2558f3 from main.
 }}}
-- 
Ticket URL: <https://code.djangoproject.com/ticket/35336#comment:14>
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