Open
Description
There are references to sqlite and mysql specific checks, those checks should be delegated to correct driver. While could be good for perfomance reasons this is very bad for code maintenability, and should be corrected.
see for instance:
https://github.com/web2py/pydal/blob/master/pydal/adapters/base.py#L404
https://github.com/web2py/pydal/blob/master/pydal/adapters/base.py#L433