We have decided not to drop this important method in 4.0 and give it a longer deprecation cycle. On the other hand we do not expect to have update_column around for a long time, it is going to be replaced in favor of update_columns.
…lain Rationale: As discussed with José and Jon, this convenience shortcut is not clearly justified and it could let the user thing the disabled EXPLAINs are related to the model instance rather than being globally disabled.
This is a first implementation, EXPLAIN is highly dependent on the database and I have made some compromises. On one hand, the method allows you to run the most common EXPLAIN and that's it. If you want EXPLAIN ANALYZE in PostgreSQL you need to do it by hand. On the other hand, I've tried to construct a string as close as possible to the ones built by the respective shells. The rationale is that IMO the user should feel at home with the output and recognize it at first sight. Per database. I don't know whether this implementation is going to work well. Let's see whether people like it.