我要持久化一个树状实体，其结构如下：

CREATE TABLE `task` (
    `id` INT(11) NOT NULL AUTO_INCREMENT,
    `parent_id` INT(11) NULL DEFAULT NULL,
    PRIMARY KEY (`id`) USING BTREE
)
COLLATE='utf8_general_ci'
ENGINE=InnoDB;

@Data
@Table
public class Task {
    @Id
    private Integer id;

    @MappedCollection(idColumn = "parent_id")
    private Set<Task> subItems;
}

public interface TaskRepository extends org.springframework.data.repository.CrudRepository<Task, Integer> {}

初始化实体：

Task task = new Task();
Task task2= new Task();
Task task3= new Task();

task.setSubItems(Set.of(task2));
task2.setSubItems(Set.of(task3));

taskRepository.save(task);//auto-generated method

SpringDataJDBC只对“task2”和“task”执行插入操作已忽略任务3。
java11、spring数据jdbc 2.0.3、mariadb 10.3