#27141: makemigrations fails with PermissionDenied on django_migrations
     Reporter:  sjoerdjob             |                    Owner:  nobody
         Type:  Cleanup/optimization  |                   Status:  new
    Component:  Migrations            |                  Version:  1.10
     Severity:  Normal                |               Resolution:
     Keywords:                        |             Triage Stage:  Accepted
    Has patch:  1                     |      Needs documentation:  0
  Needs tests:  0                     |  Patch needs improvement:  0
Easy pickings:  0                     |                    UI/UX:  0

Comment (by sjoerdjob):

 Responding to Tim Graham his remark on the pull request:

 > Sure, you could let us know how inspectdb currently works with this
 situation. I guess it might hit that exception block. I guess if that's
 better than silently skipping such tables then that solution may not be
 ideal, or at least we'd need a new parameter to
 introspection.table_names() to skip unowned tables.

 Yes, I'm indeed hitting the exception handler there. Based on results from
 Django==1.9.7, it comes from `get_table_description` which has a `SELECT *
 FROM %s LIMIT 1`.

 So I think what would make the most sense would be to add a `try`/`except
 DatabaseError` around the part where the applied migrations are obtained,
 and then (re-)raise a `MigrationSchemaMissing` instead. The error message
 is after all correct: "\nNot checking migrations as it is not possible to
 access/create the django_migrations table.".

Ticket URL: <https://code.djangoproject.com/ticket/27141#comment:3>
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