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Changes between Initial Version and Version 1 of Ticket #9536, comment 5

initial	v1
5	5
6	6	* Why set `self._env` to `None` after getting the connection? Wouldn't it be more intuitive to set a `_db = None` at class scope, and check for that in `__exit__()` to decide if a commit or rollback is needed?
7		* Does it make sense to use "private" attributes like `_env` and `_db`, when the context manager won't ever be accessible to the users? I would prefer dropping the underscores.
	7	* Does it make sense to use "private" attributes like `_env` and `_db`, when the context manager won't ever be accessible to the users anyway? I would prefer dropping the underscores.
8	8	* I like the idea of preventing commits and rollbacks in query connections, but could we add that functionality to `ConnectionWrapper` instead? (I haven't got time to look now, so correct me if I'm wrong.)