Question

我有这个实体

@Entity
public class OrderEntity {
   /**
   * Unique id of this order.
   */
   @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   private int id;

   @Formula(value="(select e.release from environment e where e.name = source_Environment)")
   private String release;

   @Column
   private String sourceEnvironment;
   
}

和

@Entity
public final class Environment {
@Id
@Column(name = "NAME", nullable = false, length = 4)
private String name;
@Column(name = "RELEASE", nullable = false, length = 4)
private String release;

Hibernate产生以下查询：

SELECT orderentity0_.id              AS id1_5_,
    orderentity0_.source_environment AS source_21_5_,
    (SELECT e.release
        FROM environment e
        WHERE e.name = orderentity0_.source_Environment ) AS formula1_
FROM OrderEntity orderentity0_

当我对我的（db2）数据库手动执行查询时，得到了预期的结果。但是，当我在由休眠（OrderEntity）创建的对象上调用orderEntity.getRelease（）时，它将返回null。

Answer 1

回答我自己的问题：我在公式中缺少该架构，因此将其设置为：

   @Formula(value="(select e.release from myschema.environment e where e.name = 
                    source_Environment)")
   private String release;

解决了我的问题。

休眠公式未设置值

1 个答案: