supper the reverse engeineering many-to-many relations ?
not yet, but soon.
why the reverse engineering tool not generate findby date methods when I have sql attributes in my table?
I will file this as an enhancement request.
what are the advantages when I choose abstact classes in the generatrion?
This allows you to customize the classes if you need to. For example, if you generate Abstract base classes, you can edit the concrete subclasses with custom methods, and then still safely regenerate the mappings, which will overwrite the abstract base classes instead of your customized concrete subclass.