Add Fields to a Business Object Based on a DB Table or View
After a business object has been created from an existing table or view, you can add fields based on other existing columns in the table or view. You typically do this when the table or view has been modified, or because a referenced business object is now available.
Note:
You cannot use the Business Object editor to add fields that would require a new column to be created. To add such a field, you must add a new column to the database table (or redefine the view), then add the field for that column.To add a field to a business object based on an existing table or view: