我有以下结构：
@Entity
@Table(name = "requests")
public class Request extends BaseHistory {
...
@OneToMany(mappedBy = "request", fetch = FetchType.LAZY, cascade = { CascadeType.ALL }, orphanRemoval = true)
private List<RequestService> services = new ArrayList<RequestService>(0);
... }
@Entity
@Table(name = "requestservices")
public class RequestService extends BaseCancellation {
...
@ManyToOne
@JoinColumn(name = "RequestId")
private Request request;
.. }
查询：
Criteria query = session.createCriteria(Request.class)
.createAlias("services", "services")
.add(Restrictions.eq("services.cancelled", type == RequestType.Cancelled))
.add(Restrictions.disjunction()
.add(Restrictions.eq("services.state", RequestServiceState.New))
.add(Restrictions.conjunction()
.add(Restrictions.eq("services.state", RequestServiceState.InProcess))
.add(Restrictions.eq("handler", employeeId)))
.add(Restrictions.eq("services.state", RequestServiceState.Pending))
)
.addOrder(Order.asc("services.executionDate"))
.addOrder(Order.asc("services.executionTime"));
最后我收到以下 SQL：
select
...
from
requests this_
left outer join
requestservices services1_
on this_.Id=services1_.RequestId
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
left outer join
requests request4_
on services1_.RequestId=request4_.Id
where
...
order by
...
有一个额外的反向连接再次将子实体与父实体连接起来是正常行为吗？
谢谢