What you are looking at is most likely an old DAL1 based data provider and associated module
- there is nothing technically wrong with using that sort of methodology - since dnn still supports DAL1.

The thing to understand is that DNN does not enforce data management rules or processes
- you can actually use any methodology you like to access the database for you own custom modules.

If it is dal1 based - as cathal mentioned - you would need to at least update any relevant info classes u_EventsRow with the new field new property added as a get/set
and also update the controller code and provider code area.