Storing extra columns than just job id, next_run_time, and job_state.

[alegend4u]

Is your feature request related to a problem? Please describe.
I want to implement my own CustomJobStore that subclasses SQLAlchemyJobStore which will use extended version of table apscheduler_jobs (some extra columns I would like to store.) But for that I have to also come up with my own CustomJob that subclasses Job. And for that I would have to implement my own scheduler as well that uses CustomJob

Describe the solution you'd like
Maybe there should be a BaseJob abstract class which can be registered with the existing scheduler to make it use CustomJob instead of Job.

Additional context
The reason I have to extend table is that I want to store some extra columns specific to business.

[agronholm]

APScheduler 4.0 will support metadata for schedules and jobs (which are a separate concept there). Can you elaborate on your requirements? I'm inclined to support custom data in schedules (and jobs) though not as top level items.

[w-Bro]

i have a same situation now, and i am trying to rewrite SQLAlchemyJobStore. It seems that this feature will be supported on v4.0, any plan for publish v4.0 recently?