Spring Data JPA 或 JPA Named Query里用注解声明Query Hint

JpaNamedQueryAnnotationQueryHintsSample.java

@Entity
@NamedQuery(name="findProfessorNoCache",
            query="SELECT e FROM Professor e WHERE e.id = ?1",
            hints={@QueryHint(name="toplink.cache-usage", value="DoNotCheckCache")})
public class Professor {
    @Id
    private int id;
    private String name;
    private long salary;
    
    //...........
    
}


//http://www.java2s.com/Code/Java/JPA/QueryHintsExample.htm

SpringDataJpaRepositoryQueryHintsSample.java

/**
 * To apply JPA QueryHints to the queries declared in your repository interface you can use the QueryHints annotation. 
 * It takes an array of JPA QueryHint annotations plus a boolean flag to potentially disable the hints applied to 
 * the addtional count query triggered when applying pagination.
 */

public interface UserRepository extends Repository<User, Long> {

  @QueryHints(value = { @QueryHint(name = "name", value = "value")}, 
              forCounting = false)
  Page<User> findByLastname(String lastname, Pageable pageable);
}