#27500: Warn about potentially significant performance degrading schema changes
when making/running migrations
-------------------------------------+-------------------------------------
     Reporter:  Oliver Bristow       |                    Owner:  nobody
         Type:  Uncategorized        |                   Status:  new
    Component:  Core (Management     |                  Version:  1.8
  commands)                          |
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:
                                     |  Unreviewed
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------

Comment (by Oliver Bristow):

 That is a fair point. I suppose it is more likely to be something for
 individual drivers to do, and even then it may be a bit out of character
 for Django to warn about something which may not be an issue. This would
 be particularly true at the migration stage, as the developers would have
 made an informed choice and then it would be down to them to mention it in
 the release notes if they feel it is appropriate.

 The scope of this is probably quite large as it does touch on several
 drivers/the behaviour of various databases. In hindsight this probably
 isn't the kind of thing that would be done in a patch, as it would touch a
 lot of code and require a fair bit of insight which would probably come
 from various people.

 p.s. while submitting this as a reply to the above with the body after
 quite, I got a "SpamBayes determined spam probability of 97.09%" message.
 Ouch

--
Ticket URL: <https://code.djangoproject.com/ticket/27500#comment:2>
Django <https://code.djangoproject.com/>
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