Hibernate 以错误的数据类型提取值

Question

我在下面有 2 个实体 Brand 和 BrandMerchantDefinition。在 ACQ_BRAND table 的 brand_code 列中，我有 00021,00022 等数据（大部分以零开头）。

@Entity
@Table(name = "ACQ_BRAND", schema = "ACQ")
public class BrandEntity {

    @Id
    @SequenceGenerator(name = "SEQ_ACQ_BRAND", sequenceName = "SEQ_ACQ_BRAND", allocationSize = 1)
    @GeneratedValue(strategy = SEQUENCE, generator = "SEQ_ACQ_BRAND")
    private Long id;
    @Version
    private Long version;
    private String corporationCode;
    private String brandCode;
    private String brandDescription;
    private String status;

    @OneToMany(mappedBy = "brandCode", cascade = {CascadeType.MERGE, CascadeType.PERSIST}, fetch = FetchType.LAZY)
    private List<BrandMerchantDefinitionEntity> brandMerchantDefinitionEntities;
}

他们加入了 brand_code 列。

@Entity
@Table(name = "ACQ_BRAND_MERCHANT_DEFINITION", schema = "ACQ")

public class BrandMerchantDefinitionEntity {

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEQ_ACQ_BRAND_MERCHANT_DEFINITION")
@SequenceGenerator(sequenceName = "SEQ_ACQ_BRAND_MERCHANT_DEFINITION", name = "SEQ_ACQ_BRAND_MERCHANT_DEFINITION", allocationSize = 1)
private Long id;

@Version
@Column(name = "VERSION")
private Long version;

@Column(name = "STATUS")
private String status;


@ManyToOne(fetch = FetchType.EAGER, targetEntity = BrandEntity.class)
@JoinColumn(name = "BRAND_CODE", insertable = false, updatable = false, columnDefinition= "VARCHAR2(10)")
private BrandEntity brandCode;

@Column(name = "STORE_CODE")
private String storeCode;

@Column(name = "CITY_NAME")
private String cityName;

}

我正在尝试寻找 brand_code = '00046' 的实体。问题是，即使 brand_code 列被定义为 String，（以及数据库中的 varchar2(10)），hibernate 将其提取为 BIGINT.

这里是生成的sql:

    Hibernate: 
    /* dynamic native SQL query */ select
        a.* 
    from
        acq_brand_merchant_definition a,
        acq_brand b 
    where
        a.brand_code = b.brand_code 
        and a.brand_code =?
2018-12-04 18:39:15.940 TRACE 1640 --- [nio-8090-exec-1] o.h.type.descriptor.sql.BasicBinder      : binding parameter [1] as [VARCHAR] - [00046]
2018-12-04 18:39:16.140 TRACE 1640 --- [nio-8090-exec-1] o.h.type.descriptor.sql.BasicExtractor   : extracted value ([id] : [BIGINT]) - [2]
2018-12-04 18:39:16.285 TRACE 1640 --- [nio-8090-exec-1] o.h.type.descriptor.sql.BasicExtractor   : extracted value ([address] : [VARCHAR]) - [Adres]
2018-12-04 18:39:16.293 TRACE 1640 --- [nio-8090-exec-1] o.h.type.descriptor.sql.BasicExtractor   : extracted value ([brand_code] : [BIGINT]) - [46]
2018-12-04 18:39:16.299 TRACE 1640 --- [nio-8090-exec-1] o.h.type.descriptor.sql.BasicExtractor   : extracted value ([city_name] : [VARCHAR]) - [55]

有趣的是，city_name 是另一个带有 VARCHAR2 的列，它包含数字。但它的开头不包含零，它被提取为 VARCHAR.

如何强制 Hibernate 将 VARCHAR2 值提取为 String？

Answer 1

连接列引用了主键，即实体的id列。这被指定为 Long 因此 BIGINT 听起来是一个合理的选择。

如果要处理成String/VARCHAR需要把主键属性改成String.

Hibernate 以错误的数据类型提取值

Hibernate extracts value in wrong data type

hibernate

jpa

jpql

spring-data-jpa