由以下原因引起：java.sql.SQLSyntaxErrorException：第 1 行 'order (id)' 附近使用正确语法的 [...] 版本

Question

此异常与

有关

spring.jpa.hibernate.ddl-auto=update

我还没有尝试保存任何数据

我认为映射是正确的，但仍然抛出异常：

org.hibernate.tool.schema.spi.CommandAcceptanceException：通过 JDBC 语句

执行 DDL "create table order (id bigint not null auto_increment, order_date date, user_id bigint, primary key (id)) engine=MyISAM" 时出错

原因：java.sql.SQLSyntaxErrorException：您的 SQL 语法有误；查看与您的 MySQL 服务器版本对应的手册，了解在第 1

行 'order (id)' 附近使用的正确语法

我的映射如下：

@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@MappedSuperclass
public abstract class BaseEntity {

    @Id
    @GeneratedValue(
            strategy = GenerationType.IDENTITY
    )
    private Long id;
}


@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@Entity(name = "Order")
@Table(name = "order")
public class Order extends BaseEntity {

    private LocalDate orderDate;

    @OneToMany(mappedBy = "order", cascade = CascadeType.ALL)
    private List<OrderedTicket> orderedTickets = new ArrayList<>();

    private Long userId;

}


@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@Entity(name = "OrderedTicket")
@Table(name = "ordered_ticket")
public class OrderedTicket extends BaseEntity {

    private Integer amount;

    @OneToOne
    @JoinColumn(name="ticket_id")
    private Ticket ticket;

    @ManyToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "order_id")
    private Order order;

}


@Getter
@Setter
@NoArgsConstructor
@Entity(name = "Ticket")
@Table(name = "ticket")
public class Ticket extends BaseEntity {

    @Enumerated(value = EnumType.STRING)
    private TicketType type;
    private Integer price;
    private Integer totalAmmount;
    private Integer inStock;

    @ManyToOne(cascade = {
            CascadeType.DETACH,
            CascadeType.MERGE,
            CascadeType.PERSIST,
            CascadeType.REFRESH
    })
    @JoinColumn(name = "event_id")
    Event event;

    @Builder
    public Ticket(TicketType type, Integer price, Integer totalAmmount, Integer inStock, Event event) {
        this.type = type;
        this.price = price;
        this.totalAmmount = totalAmmount;
        this.inStock = inStock;
        this.event = event;
    }

}

Answer 1

您不应该命名您的 table ORDER，因为 ORDER 是保留的 SQL 关键字。

您可以这样做，但您将始终必须将 ORDER 括在引号中。

请查看所有保留关键字的 MySQL 手册：

https://dev.mysql.com/doc/refman/8.0/en/keywords.html

Answer 2

ORDER是保留字（用于ORDER BY子句）您应该更改 table 名称，例如使用不同的 table 名称

create table customer_order (
  id bigint not null auto_increment
, order_date date
, user_id bigint
, primary key (id)) 
engine=MyISAM"

或者如果您确实需要这个 table 名称，请在 tablename

周围使用反引号

create table `order` (
  id bigint not null auto_increment
, order_date date
, user_id bigint
, primary key (id)) 
engine=MyISAM"

Answer 3

尝试用反引号将订单 table 名称括起来。否则，引擎将因保留关键字而不断抛出错误：

@Table(name = "`order`")
public class Order extends BaseEntity {

由以下原因引起：java.sql.SQLSyntaxErrorException：第 1 行 'order (id)' 附近使用正确语法的 [...] 版本

Caused by: java.sql.SQLSyntaxErrorException: [...] version for the right syntax to use near 'order (id)' at line 1

mysql

hibernate

spring-boot

spring-data-jpa

many-to-one