JPQL (JPA) Find Object if list have intersection

问题

I have two Classes each of which hold a list of Labels. Now I want to find every object of ClassA that holds any item of the list of ClassB. Is this possible with JPQL? Or using a single query?

public class ClassA {
  private List<Label> labels;
}

public class ClassB {
  private List<Label> labels;
}

@Repository
public interface ClassARepository extends JpaRepository<ClassA, Long> {

  @Query("SELECT c FROM ClassA c WHERE :labels ____ c.labels")
  public List<ClassA> findAllByLabels(@Param("labels") List<Label> labels);

}

thanks

回答1:

Try the following (I did not try it):

SELECT DISTINCT(a) FROM ClassA a, ClassB b INNER JOIN a.labels labelA INNER JOIN b.labels labelB WHERE labelA = labelB

来源：https://stackoverflow.com/questions/28831350/jpql-jpa-find-object-if-list-have-intersection