Add support for Eclipselink

Can Spring Boot supports natively also Eclipselink ?. I’m struggling with hibernate because it doesn’t really support composite keys (a.k.a Natural keys). For example if i try queries like these:

select count(distinct e) from entity as e --> select count(distinct **id_part1, id_part2**) from entity
select e from entity where e exists (select ee from entity as ee) --> select id_part1, id_part2 from entity where (id_part1, id_part2) exists (select **(**id_part1, id_part2**)** from entity)

and many others. Surrogate keys aren’t a solution, only a workaround. Also the lack of support by Red-hat, for example issue [https://hibernate.atlassian.net/browse/HHH-1615](group by issue)

@Data//lombok
@IdClass(EntityPK )
public class Entity {
    @Id
    String id_part1;
    @Id
    String id_part2

  @Data//lombok
  public static class EntityPK {
    @Column
    String id_part1;
    @Column
    String id_part2;
  }
}

[philwebb]

I’m afraid we don’t current have auto-configuration for Eclipselink but it is supported by Spring Data and Spring Framework. It looks like @dsyer has already put together an example project that shows how you can use it.

[philwebb]

We’re cleaning out the issue tracker and closing issues that we’ve not seen much demand to fix. Feel free to comment with additional justifications if you feel that this one should not have been closed.