QuerySyntaxException：在获取的关联上不允许使用 with-clause；使用过滤器答案

【问题标题】：QuerySyntaxException: with-clause not allowed on fetched associations; use filtersQuerySyntaxException：在获取的关联上不允许使用 with-clause；使用过滤器
【发布时间】：2017-08-11 13:25:38
【问题描述】：

我的 HQL 请求

SELECT p FROM Payment p 
LEFT JOIN FETCH p.paymentProperties pr ON p.id = pr.payment.id 
WHERE 
p.user.id = :userId ORDER BY id DESC

数据类实体

@Entity
@Table (name = "t_payment")
public class Payment {
    @Id
    @GeneratedValue (strategy = GenerationType.IDENTITY)
    private Long id;

    @ManyToOne (cascade = CascadeType.DETACH)
    @JoinColumn (name = "user_id", nullable = false)
    private User user;

    @OneToMany (mappedBy = "payment", fetch = FetchType.EAGER, cascade = {CascadeType.PERSIST, CascadeType.DETACH})
    private List<PaymentProperty> paymentProperties;
}


@Entity
@Table (name = "t_payment_property")
public class PaymentProperty {
    @Id
    @GeneratedValue (strategy = GenerationType.IDENTITY)
    private Long id;

    @ManyToOne (fetch = FetchType.LAZY, cascade = {CascadeType.PERSIST, CascadeType.DETACH})
    @JoinColumn (name = "payment_id", nullable = false)
    private Payment payment;

}


@Entity
@Table (name = "t_user")
public class User {
    @Id
    @GeneratedValue (strategy = GenerationType.IDENTITY)
    private Long id;
}

结果异常：QuerySyntaxException: with-clause not allowed on fetched associations;使用过滤器

任何想法都必须在不删除 fetch 的情况下修复它？

【问题讨论】：

标签： java postgresql hibernate hql

【解决方案1】：

试试这个查询应该可以工作：

  SELECT p FROM Payment p 
  LEFT JOIN FETCH p.paymentProperties pr  
   WHERE p.id = pr.payment.id
   AND   p.user.id = :userId 
   ORDER BY p.id DESC

【讨论】：

错误：列引用“id”不明确
id 不明确，立即尝试@Ant20
HHH000104：使用集合获取指定的 firstResult/maxResults；在内存中应用！但是工作，谢谢你

【解决方案2】：

只需删除ON p.id = pr.payment.id。不是 SQL 而是 HQL

SELECT p FROM Payment p 
LEFT JOIN FETCH p.paymentProperties pr
WHERE 
p.user.id = :userId ORDER BY p.id DESC

【讨论】：