org.hibernate.tool.schema.spi.CommandAcceptanceException: 执行 DDL 创建 table 索引时出错

Question

我正在尝试创建 table，但出现错误，我不知道为什么。我以为是因为浮动，但我的 Field table 有一个浮动并且正在正确生成。

我正在尝试更改方言或 create-drop 属性。但这对我没有帮助。所以我真的不知道该怎么办。

此外，我认为列排名是错误的原因，但我不知道为什么

错误：

org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "create table index (id integer not null, lemma_id integer not null, page_id integer not null, rank float not null, primary key (id)) engine=MyISAM" via JDBC Statement
    at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:439)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:423)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:314)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121)
    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:156)
    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73)
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:318)
    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:468)
    at loader.Loader.main(Loader.java:22)
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 'index (id integer not null, lemma_id integer not null, page_id integer not null,' at line 1
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120)
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
    at com.mysql.cj.jdbc.StatementImpl.executeInternal(StatementImpl.java:762)
    at com.mysql.cj.jdbc.StatementImpl.execute(StatementImpl.java:646)
    at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54)
    ... 11 more

休眠配置

    <!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/search_engine?useSSL=false</property>
        <property name="connection.username">root</property>
        <property name="connection.password">roottoor</property>
        <property name="connection.pool_size">10</property>
        <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>
        <property name="show_sql">true</property>
        <property name="current_session_context_class">thread</property>
        <property name="hbm2ddl.auto">create-drop</property>

        <mapping class="loader.scanner.Website"></mapping>
        <mapping class="loader.entity.Field"></mapping>
        <mapping class="loader.entity.Lemma"></mapping>
        <mapping class="loader.entity.Index"></mapping>

    </session-factory>
</hibernate-configuration>

索引实体

package loader.entity;

import javax.persistence.*;

@Entity
@Table(
        name = "index"
)
public class Index {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;

    @Column(
            name = "page_id",
            nullable = false
    )
    private int pageId;

    @Column(
            name = "lemma_id",
            nullable = false
    )
    private int lemmaId;

    @Column(
            nullable = false
    )
    private float rank;

    public Index(int pageId, int lemmaId, float rank) {
        this.pageId = pageId;
        this.lemmaId = lemmaId;
        this.rank = rank;
    }

    public Index(){

    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getPageId() {
        return pageId;
    }

    public void setPageId(int pageId) {
        this.pageId = pageId;
    }

    public int getLemmaId() {
        return lemmaId;
    }

    public void setLemmaId(int lemmaId) {
        this.lemmaId = lemmaId;
    }

    public float getRank() {
        return rank;
    }

    public void setRank(float rank) {
        this.rank = rank;
    }

    @Override
    public String toString() {
        return "Index{" +
                "id=" + id +
                ", pageId=" + pageId +
                ", lemmaId=" + lemmaId +
                ", rank=" + rank +
                '}';
    }
}

Answer 1

Index 和 rank 是 SQL 中的保留关键字。尝试将其更改为其他内容。

但是如果你只想使用索引，那么使用下面的方法。

@Table(name = "\"index\"")

org.hibernate.tool.schema.spi.CommandAcceptanceException: 执行 DDL 创建 table 索引时出错

org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL create table index

java

entity

hibernate