The AssociationOverride annotation may be applied to an entity that extends a mapped superclass to override a many-to-one or one-to-one mapping defined by the mapped superclass. If the AssociationOverride annotation is not specified, the join column is mapped the same as in the original mapping.

    Example:
    @MappedSuperclass
    public class Employee {
        ...
        @ManyToOne
        protected Address address;
        ...
    }
    
    @Entity 
    @AssociationOverride(name="address", 
        joinColumns=@JoinColumn(name="ADDR_ID"))
    // address field mapping overridden to ADDR_ID fk
    public class PartTimeEmployee extends Employee {
        ...
    }