如何在 JPA 中定义用于 Id (promary) 的自定义序列生成器？

Question

My application is using Jakarta EE JPA for persisting data to Database. The application has to generate Custom(encoded) sequence for performance reasons. By default JPA seems to generate Ids for an entity using some sequence.

How to override default sequence generator with customer sequence generator coded in Java?

Answer 1

This is how you go with the custom sequence:

@Id
@SequenceGenerator(name = "pet_seq", 
        sequenceName = "pet_sequence", 
        initialValue = 1, allocationSize = 20)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "pet_seq")
@Column(name = "id", nullable = false)
private Long id;

In this case it will use pet_sequence instead of the default one. Also you can read this article for a better understanding of this subject.