Well, SERIALIZABLE isn't the default in Oracle, Postgres, or MySQL.. it's READ_COMMITTED, READ_COMMITTED, and REPEATABLE_READ respectively (unless the documenta

Well, SERIALIZABLE isn't the default in Oracle, Postgres, or MySQL.. it's READ_COMMITTED, READ_COMMITTED, and REPEATABLE_READ respectively (unless the documentation i just looked up is out-of-date) I'm just saying you still can't rely on it by default, and have to start reading the details of the isolation levels. If you're doing that all the time, it might be a reason to rethink the design (however, there are of course some exceptions)