java - What is the benefit of @MappedSuperclass in Hibernate for inheritance mapping?

Question

According to the Hibernate docs, MappedSuperclass allows mapping inheritance, where the super class is not treated as an entity, and where polymorphic queries that fetch objects by the base class are not supported.

On the other hand, the table per class strategy is similar in terms of the generated schema in the DB, except that it maps the super class to a table if it is not an abstract. However it supports polymorphic queries.

My question is: why would anyone use the @MappedSuperclass strategy? Is there a performance issue implied if the parent class is treated as an entity? Any ideas around this is appreciated.

question from:https://stackoverflow.com/questions/66045230/what-is-the-benefit-of-mappedsuperclass-in-hibernate-for-inheritance-mapping

Answer 1

meaning a class whose mapping information is applied to the entities that inherit it.