3 ms·

Thanks. I thought it would be something... smarter. Not sure I like that, seems to come with a lot of caveats.

• xani_ 4y ago
  "smarter" means more code and that's rarely more maintainable. It's what you have to do if you want less downtime. Normally it shouldn't span much more than 2-3 versions of application and it's rare that the annoying kind (say writing same data to "old" and "new" column) happens.