Inheritance support
Inheritance is one of the key concepts in Java, and it’s used in most domain models
SQL doesn’t support this kind of relationship, JPA implementation maps it to a supported concept
Single table inheritance strategy
Single Table inheritance: the default strategy used in this technical preview release
Single Table inheritance: the simplest and typically the best performance when doing queries
Single Database Table: will be used to store every attribute of every class in the hierarchy
Discriminator Column: used to determine which class the row belongs to, each class in the hierarchy defines its own unique discriminator value
Entity inheritance model example
Single table inheritance example
