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[英]Spring MVC JPA exception org.hibernate.exception.SQLGrammarException
[英]JPA Exception: org.hibernate.exception.SQLGrammarException
我正在使用 MySQL DB 開發 Spring MVC 應用程序。 數據庫中的兩個表具有一對多的關系。
其中一張表是測驗
@Entity
@Table(name="Quiz", schema = "QuizOwo")
public class QuizEntity
{
@Id
@GeneratedValue(strategy= GenerationType.IDENTITY)
@Column(name = "idQuiz")
private int idQuiz;
@Column(name = "nameQuiz")
private String nameQuiz;
@Column(name = "descriptionQuiz")
private String descriptionQuiz;
@ManyToOne(optional=false)
@JoinColumn(name = "idCategory")
private CategoryQuizEntity categoryQuizEntity;
@Column(name = "idPortal")
private int idPortal;
另一個表是
@Entity
@Table(name="CategoryQuiz", schema = "QuizOwo")
public class CategoryQuizEntity
{
@Id
@GeneratedValue(strategy= GenerationType.IDENTITY)
@Column(name = "idCategoryQuiz")
private int idCategoryQuiz;
@Column(name = "nameCategory")
private String nameCategory;
@OneToMany(mappedBy="categoryQuizEntity", targetEntity=QuizEntity.class, fetch=FetchType.LAZY)
@LazyCollection(LazyCollectionOption.FALSE)
private List<QuizEntity> quizEntities;
我的問題是,當 SQL 語句被釋放(使用 hibernate JPA)時, org.hibernate.exception.SQLGrammarException 會隨此信息一起拋出。
could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet
為什么?
- -編輯 - -
我的mysql配置是
@Configuration
@EnableTransactionManagement
public class PersistenceConfig
{
/** Bean para obtener el dataSource */
@Bean(name = "dataSource")
public DataSource getDataSource(){
DataSource dataSource = createDataSource();
return dataSource;
}
/** Generador del datasource */
private DriverManagerDataSource createDataSource() {
DriverManagerDataSource driverManagerDataSource = new DriverManagerDataSource();
driverManagerDataSource.setDriverClassName(ConfigurationManager.getProperty(ConfigurationManager.DATABASE_DIVERCLASSNAME));
driverManagerDataSource.setUrl(ConfigurationManager.getProperty(ConfigurationManager.DATABASE_URL));
driverManagerDataSource.setUsername(ConfigurationManager.getProperty(ConfigurationManager.DATABASE_USERNAME));
driverManagerDataSource.setPassword(ConfigurationManager.getProperty(ConfigurationManager.DATABASE_PASSWORD));
driverManagerDataSource.setConnectionProperties(databaseProperties());
return driverManagerDataSource;
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
/** Generamos un entityManagerFactory con lo paquetes donde tiene que escanear para buscar a las entidades, el datasource
* las propiedades de hibernate... */
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() throws ClassNotFoundException, PropertyVetoException {
LocalContainerEntityManagerFactoryBean emf = new LocalContainerEntityManagerFactoryBean();
emf.setDataSource(createDataSource());
emf.setPackagesToScan(new String[] { "com.owo.quiz.models" });
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
emf.setJpaVendorAdapter(vendorAdapter);
emf.setJpaProperties(hibernateProperties());
return emf;
}
/** Propiedades para hibernate/JPA */
Properties hibernateProperties() {
return new Properties() {
{
setProperty("hibernate.dialect", ConfigurationManager.getProperty(ConfigurationManager.HIBERNATE_DIALECT));
setProperty("hibernate.globally_quoted_identifiers", "true");
}
};
}
/** Propiedades para la conexión con la base de datos */
Properties databaseProperties() {
return new Properties() {
{
setProperty("characterEncoding", "iso8859-1");
}
};
}
}
=== 編輯 ====
SQL INSERT 測驗表是
CREATE TABLE Quiz ( idQuiz int(11) NOT NULL AUTO_INCREMENT, nameQuiz varchar(45) COLLATE latin1_spanish_ci DEFAULT NULL, descriptionQuiz text COLLATE latin1_spanish_ci, idCategory int(11) DEFAULT NULL, idPortal int(11) DEFAULT NULL, PRIMARY KEY (idQuiz), KEY fk_Quiz_1_idx (idCategory), CONSTRAINT fk_Quiz_1 FOREIGN KEY (idCategory) REFERENCES CategoryQuiz (idCategoryQuiz) ON DELETE NO ACTION ON UPDATE NO ACTION ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=latin1 COLLATE=latin1_spanish_ci;
我重置了該用戶的所有 MySQL 權限並且它工作正常。
嘗試將 MySQL 方言設置為連接屬性的一部分。
hibernate.dialect=org.hibernate.dialect.MySQLDialect
如果您使用的是 spring 、 spring boot 、 spring data 、 JPA 和 Hibernate,請嘗試使用以下屬性:
spring.jpa.properties.hibernate.globally_quoted_identifiers=true
如果您只使用休眠:
hibernate.globally_quoted_identifiers=true
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