尽管配置了正确的方言，为什么 Hibernate 会导致 SQL 语法错误？ [关闭]

Question

我被难住了。我正在建立一个新的 Spring Boot 项目。我创建了几个实体类。它能够在数据库中创建一半的表，所以我知道大部分是能够连接到数据库。我已经检查并在配置中设置了方言 - 我正在使用 org.hibernate.dialect.MySQLDialect。 当我尝试运行该问题时，我不断收到如下一组错误：

Caused by: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'integer, symbol varchar(5), primary key (id)) engine=InnoDB' at line 1

我尝试检查 google 和其他 stackoverflow 问题均无济于事。大多数情况下，我的发现引导我确保设置了正确的方言，并避免我检查过的保留关键字。

以下是显示的另外两个错误：

Caused by: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'integer, primary key (id)) type=MyISAM' at line 1

Caused by: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'varchar(255), clock_in varchar(255), clock_out varchar(255), coin varchar(255), ' at line 1

编辑： 这是hibernate正在生成的sql：

Hibernate: create table record (id integer not null, cash varchar(255), check varchar(255), clock_in varchar(255), clock_out varchar(255), coin varchar(255), primary key (id)) type=MyISAM

create table route (id integer not null, name varchar(100), color integer, driver varchar(255), index integer, primary key (id)) type=MyISAM

create table store (id integer not null, name varchar(100), address varchar(255), index integer, symbol varchar(255), primary key (id)) type=MyISAM

编辑 2 - 这是似乎在自动生成表时遇到问题的实体类之一：

package org.tampasa.kettles.models;

import javax.persistence.Entity;

@Entity
public class Store extends AbstractEntity{

    private String address;

    private String symbol;

    private int index;

    // Constructors

    public Store() {
    }


    // Getters and Setters

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getSymbol() {
        return symbol;
    }

    public void setSymbol(String symbol) {
        this.symbol = symbol;
    }

    public Integer getIndex() {
        return index;
    }

    public void setIndex(Integer index) {
        this.index = index;
    }

}

这里是 AbstractEntity：

package org.tampasa.kettles.models;

import org.hibernate.validator.constraints.Length;

import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
import javax.validation.constraints.NotBlank;
import java.util.Objects;

@MappedSuperclass
public abstract class AbstractEntity {

    @Id
    @GeneratedValue
    private int id;

    @NotBlank(message = "Name must not be blank")
    @Length(min = 1, max = 100, message = "Name must be between 1 and 100 characters")
    private String name;

    public int getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return name;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        AbstractEntity that = (AbstractEntity) o;
        return id == that.id;
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }

}

Answer 1

一个可能的原因是name 和index 列使用了SQL 保留字。至少在MySQL 8.0。通常也是如此。 我偶然发现了它too。 :D

根据this answer，您可以将行hibernate.globally_quoted_identifiers=true 添加到您的.properties 文件中。这应该使 Hibernate 转义保留字，也许可以解决您遇到的问题。