pdo driver levels

Hi, I think I have heard other people mention this before, but I would like to bring this topic up again. It might be a good idea to define driver "levels" that could help indicate how complete the given driver is. I do not have a real game plan yet, nor do I have a real overview where drivers diverge at this point. However I presume we will get some more features into PDO over time and so I presume the differences will become bigger, especially for newer drivers. Possible points could be: - transaction support - native prepared query support - LOB streaming - a set of minimal supported sqlstate error codes - support for lastinsertid - column metadata reading - multi result set handling - cursors So the idea would be to define a number of support levels for drivers, so that users could quickly check if the given driver fullfills the requirements of their application. regards, Lukas