US Patent 10417248 Field extension in database system

In one embodiment, a method stores extension logic for a business context for an application in a backend database system. The extension logic is stored with respect to a database table, business logic to handle transactions in the backend system, and an application programming interface to the application. A request for a custom field is received through a runtime version of the application, the custom field specifying a business context in which the custom field is associated. The method determines the extension logic associated with the business context in the backend database system. Further, the method uses the extension logic to extend the database table with the custom field, extend the business logic to handle transactions for the custom field in the backend system, and extend the application programming interface to the application. The custom field is extended during runtime of the application.