JPA (EclipseLink) SecondaryTable 错误加入 java 1.7

Question

我使用 SecondaryTable 注释

创建了一个加入客户 table 和客户详细信息 table 的实体

@Entity
@Table(name="CUSTOMER")
@SecondaryTable(name="CUST_DETAIL", 
            pkJoinColumns=@PrimaryKeyJoinColumn(name="CUST_DETAIL_ID", referencedColumnName = "CUST_DETAIL_ID"))
public class Customer {
    @Id
    @Column(name = "CUST_ID")
    private Long id;

    @Column(name = "CUST_DETAIL_ID")
    private Long custDetailPk;

    @Column(name = "CUST_DETAIL_ID", table = "CUST_DETAIL")
    private Long custDetailId;

    ...
}

它正在使用 java 1.6，生成的查询类似于

SELECT t0.CUST_ID, t0.CUST_DETAIL_ID, t1.CUST_DETAIL_ID, ... FROM CUSTOMER t0, CUST_DETAIL t1 WHERE t1.CUST_DETAIL_ID = t0.CUST_DETAIL_ID

但是当我迁移到 java 1.7 时，生成的查询接缝是错误的

SELECT t0.CUST_ID, t1.CUST_DETAIL_ID, t0.CUST_DETAIL_ID, ... FROM CUSTOMER t0, CUST_DETAIL t1 WHERE t1.CUST_DETAIL_ID = t1.CUST_DETAIL_ID

并返回多行。

jpa secondarytable和java1.7有什么问题吗？

Answer 1

解决方案来自避免由字段名称 CUST_DETAIL_ID 引起的混淆，JPA 需要知道 table 属于什么，以及属性名称 custDetailI d 和 custDetailPk 必须按字母顺序排列。

@Entity
@Table(name="CUSTOMER")
@SecondaryTable(name="CUST_DETAIL", 
            pkJoinColumns=@PrimaryKeyJoinColumn(name="CUST_DETAIL_ID", referencedColumnName = "CUST_DETAIL_ID"))
public class Customer {
    @Id
    @Column(name = "CUST_ID")
    private Long id;

    @Column(name = "CUST_DETAIL_ID", table = "CUSTOMER")
    private Long custDetailId;

    @Column(name = "CUST_DETAIL_ID", table = "CUST_DETAIL")
    private Long custDetailPk;

    ...
}

JPA (EclipseLink) SecondaryTable 错误加入 java 1.7

JPA (EclipseLink) SecondaryTable erroneous join with java 1.7

java

jpa

eclipselink