Hibernate CriteriaBuiler .or()

Question

我已经为我的查询构造了以下或谓词。我想检索所有没有关联客户的订单，以及有关联且具有几种特定状态之一的订单。

Predicate p1 = cbuilder.isNull(root.get(Order_.customer)); 
Predicate p2 = root.get(Order_.customer).get(Customer_.status).in(statusList);

predicates.add(cbuilder.or(p2, p1));

...

cquery.where(cbuilder.and(predicates.toArray(new Predicate[predicates.size()])));

对于示例数据集，p1 和 p2 都为真。但是，查询 returns 没有结果。换句话说，这个：

Predicate p1 = cbuilder.isNull(root.get(Order_.customer)); 
predicates.add(p1);

还有这个：

Predicate p2 = root.get(Order_.customer).get(Customer_.status).in(statusList);
predicates.add(p2);

两个 return 结果，但是当我尝试添加 .or() 运算符时，它 return 没有结果。以下为部分生成的 sql 查询，我在这里做错了什么？

休眠：

select 
    order0_.orderId as orderId1_1_, 
    order0_.customer_customerId as customer_s10_1_,
    ...

from 
    Order order0_ 

cross join Customer customer1_ 
    where 
        order0_.customer_customerId=customer1_.customerId 

    and 
        (customer1_.status in (? , ? , ? , ? , ? , ? , ? , ?) 
            or 
        order0_.customer_customerId is null)

通过仅将 p1 添加到谓词生成了 sql 查询：

休眠：

select 
    order0_.orderId as orderId1_1_, 
    order0_.customer_customerId as customer_s10_1_
    ...

from 
    Order order0_ 

where 
    (order0_.customer_customerId is null)

通过仅将 p2 添加到谓词生成了 sql 查询：

休眠：

select 
    order0_.orderId as orderId1_1_,  
    order0_.customer_customerId as customer_s10_1_, 

from 
    Order order0_ 

cross join Customer customer1_ 
    where 
        order0_.customer_customerId=customer1_.customerId 

    and 
        (customer1_.status in (? , ? , ? , ? , ? , ? , ? , ?))

Answer 1

当Customer 为null 时，此部分返回false，因为无法满足第一个谓词(where ..)。首先添加一个子查询并从查询中取出第二个谓词，修复它。

cross join Customer customer1_ 
where 
    order0_.customer_customerId=customer1_.customerId 

and 
    (customer1_.status in (? , ? , ? , ? , ? , ? , ? , ?) 
        or 
    order0_.customer_customerId is null)

Hibernate CriteriaBuiler .or()

Hibernate CriteriaBuiler .or()

java

hibernate

hibernate-criteria