#22496: Data migrations are not transactional (except on Postgres)
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               Reporter:  shai       |          Owner:  nobody
                   Type:  Bug        |         Status:  new
              Component:             |        Version:  master
  Migrations                         |       Keywords:  oracle mysql sqlite
               Severity:  Release    |      Has patch:  0
  blocker                            |    Needs tests:  1
           Triage Stage:  Accepted   |  Easy pickings:  0
    Needs documentation:  1          |
Patch needs improvement:  0          |
                  UI/UX:  0          |
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 In e74d2183c28467aefc0b87e3fa6d405dbfdea82c (master) and
 9bf890f6f9d137d5b86fd9a6a38fb11c5d21b1af (1.7.x) schema editor was made
 not to open transactions for backends that cannot roll back DDL. However,
 there is nothing else that starts transactions in migrations, even if they
 are data migrations -- so now, of the backends in core, migrations are
 only transactional on PostgreSQL.

 This is a spin-off from #22483.

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Ticket URL: <https://code.djangoproject.com/ticket/22496>
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