Caused by: java.sql.SQLSyntaxErrorException: Table 'sell.hibernate_sequence' doesn't exi

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数据表:

create table product_category(
    category_id int not null auto_increment,
    category_name varchar(64) not null comment 类目名字,
    ......  

domain:    

@Entity
public class ProductCategory 
   @Id
   @GeneratedValue
   private Integer categoryId;
   private String categoryName;
   private Integer categoryType;
    setter... 
    getter...

Repository:

public interface ProductCategoryRepository extends JpaRepository<ProductCategory,Integer> 

测试代码:

@Test
    public void saveTest()
        ProductCategory productCategory = new ProductCategory();
        productCategory.setCategoryName("测试b");
        productCategory.setCategoryType(3);
        repository.save(productCategory);
    

报错:Caused by: java.sql.SQLSyntaxErrorException: Table ‘sell.hibernate_sequence‘ doesn‘t exist

解决:在domain实体类指明主键生成策略,保持数据库一致

@Entity
public class ProductCategory 
   @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   private Integer categoryId;
   private String categoryName;
   private Integer categoryType;

JPA四种生成策略了解下。

疑点:原文使用@GeneratedValue注解,即@GeneratedValue(strategy = GenerationType.AUTO),不是应该根据数据库支持的主键生成策略自动选择合适的吗,数据库中使用了auto_increment,为什么这边没有支持而报错?

 

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