Spring data jpa 使用@OneToOne注释连接两个表实体生成;交叉连接“;而";“内部连接”;预期
我有OneTONE表格/实体个人和员工: 每个员工只有一个人,每个人都与一个且只有一个员工关联。 生成的查询do表使用“交叉联接”关键字联接,而“内部联接”更合适Spring data jpa 使用@OneToOne注释连接两个表实体生成;交叉连接“;而";“内部连接”;预期,spring-data-jpa,one-to-one,cross-join,Spring Data Jpa,One To One,Cross Join,我有OneTONE表格/实体个人和员工: 每个员工只有一个人,每个人都与一个且只有一个员工关联。 生成的查询do表使用“交叉联接”关键字联接,而“内部联接”更合适 @Entity @Table(name="person") @Data public class Person implements Serializable { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) @Column(name="id_Per
@Entity
@Table(name="person")
@Data
public class Person implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="id_Person", unique=true, nullable=false)
private long id;
@Column(nullable=false, length=50)
private String name;
@Column(nullable=false, length=255)
private String EMail;
}
@Entity
@Table(name="employee")
@Data
public class Employee implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="id_Employee", unique=true, nullable=false)
private long id;
@Column(nullable=false, length=50)
private String numero;
@OneToOne(fetch = FetchType.EAGER, optional=false)
@JoinColumn(name="id_Employee")
private Person person;
}
存储库:
公共接口EmployeeRepository扩展了Crudepository{
@查询(“从员工e中选择e,其中较低的(e.person.name),如CONCAT(较低的(:name),'%')”)
列出findByName(@Param(“name”)字符串名);
}
以下是生成的查询:
select employee0_.id_Employee as id_Emplo1_0_, employee0_.department as departme2_0_
from employee employee0_
cross join person person1_
where employee0_.id_Employee=person1_.id_Person
and (lower(person1_.name) like concat(lower(?), '%'))
;
select person0_.id_Person as id_Perso1_2_0_, person0_.EMail as EMail2_2_0_, person0_.name as name3_2_0_
from person person0_
where person0_.id_Person=?
;
“实体”“员工”“加入”列中存在错误,该列应为id\u Person。 除此之外,我建议使用Querydsl对连接进行细粒度控制。您的查询将如下所示:
query.from(employee).leftJoin(employee.person, person)
.where(person.name.lower().like(name.toLowerCase() + "%")).fetch();