#30681: SQL script from python manage.py sqlsequencereset doesn't work with
Postgres 11.3
-------------------------------------+-------------------------------------
               Reporter:  ipa        |          Owner:  nobody
                   Type:  Bug        |         Status:  new
              Component:  Database   |        Version:  2.1
  layer (models, ORM)                |
               Severity:  Normal     |       Keywords:
           Triage Stage:             |      Has patch:  0
  Unreviewed                         |
    Needs documentation:  0          |    Needs tests:  0
Patch needs improvement:  0          |  Easy pickings:  0
                  UI/UX:  0          |
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 After migration to postgres I had to resync the primary key and used the
 following command.

 python manage.py sqlsequencereset app | python manage.py dbshell

 After that, the PK was still out of sync and I got PK violations. The
 output from sqlsequencereset was:

 BEGIN;
 SELECT setval(pg_get_serial_sequence('"tablename"','id'),
 coalesce(max("id"), 1), max("id") IS NOT null) FROM "tablename";
 COMMIT;

 After that I tried a different command which I wrote manually and worked.

 SELECT setval('tablename_id_seq', (SELECT MAX(id) FROM tablename)+1)

 It seems that the SQL produces by sqlsequencereset doesn't work on some
 postgres versions.

 Postgres Version 11.3

-- 
Ticket URL: <https://code.djangoproject.com/ticket/30681>
Django <https://code.djangoproject.com/>
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