Question

我正在尝试将{strong> Oracle 12c标识列功能与Hibernate-5.0.0.CR4一起使用。我在Spring boot application.properties中使用了以下属性：

spring.jpa.hibernate.dialect=org.hibernate.dialect.Oracle12cDialect
spring.datasource.driverClassName=oracle.jdbc.OracleDriver

来自Oracle12cDialect的{{3}}，似乎它支持标识列。但是在尝试将记录插入名为user_preferences的表：

时，我收到以下错误

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

import org.hibernate.envers.Audited;
import org.hibernate.envers.RelationTargetAuditMode;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

import lombok.Data;

@Entity
@Table(name = "user_preferences")
@Data
@JsonIgnoreProperties(value = { "prefId" })
@Audited(targetAuditMode = RelationTargetAuditMode.NOT_AUDITED)
public class UserPreference {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "pref_id")
    private Long prefId;

    @Column(nullable = false)
    private String key;

    @Column(nullable = false)
    private String preference;

    @ManyToOne
    @JoinColumn(name = "user_id")
    private User user;

    public UserPreference() {
    }

    public UserPreference(String key, String preference, User user) {
        this.key = key;
        this.preference = preference;
        this.user = user;
    }

}

我得到的例外：

java.sql.SQLException: Invalid column type: getLong not implemented for class oracle.jdbc.driver.T4CRowidAccessor
    at oracle.jdbc.driver.GeneratedAccessor.getLong(GeneratedAccessor.java:436)
    at oracle.jdbc.driver.GeneratedStatement.getLong(GeneratedStatement.java:228)
    at oracle.jdbc.driver.GeneratedScrollableResultSet.getLong(GeneratedScrollableResultSet.java:564)
    at org.hibernate.id.IdentifierGeneratorHelper.get(IdentifierGeneratorHelper.java:113)
    at org.hibernate.id.IdentifierGeneratorHelper.getGeneratedIdentity(IdentifierGeneratorHelper.java:73)
    at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:88)
    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:42)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2730)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3300)
    at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81)
    at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:474)
    at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:179)
    at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:163)
    at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:198)
    at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:317)
    at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:272)
    at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:178)
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:109)
    at org.hibernate.jpa.event.internal.core.JpaPersistEventListener.saveWithGeneratedId(JpaPersistEventListener.java:67)
    at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:189)
    at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:132)
    at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:58)
    at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:774)
    at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:747)
    at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:752)
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1146)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:344)
    at com.sun.proxy.$Proxy106.persist(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:291)
    at com.sun.proxy.$Proxy106.persist(Unknown Source)
    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:433)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:436)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:421)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:393)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$DefaultMethodInvokingMethodInterceptor.invoke(RepositoryFactorySupport.java:506)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodIntercceptor.invoke(CrudMethodMetadataPostProcessor.java:122)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy117.save(Unknown Source)
    at nl.yestelecom.phoenix.user.preference.UserPreferenceService.saveUserPreference(UserPreferenceService.java:45)
    at nl.yestelecom.phoenix.controller.UserController.saveUserPreference(UserController.java:34)

如果有方法可以在不使用数据库序列的情况下使用标识列，请告诉我。

Answer 1

当您指定GenerationType.IDENTITY时，Hibernate 5.0.X似乎会尝试从数据库中获取ID值。使用适当的getXXX从java ResultSet中检索此值，具体取决于您用于声明ID的类型。 resultSet.getString（columnIndex）或resultSet.getRowId（columnIndex）在我的情况下工作，但RowId不能在JPA bean中使用。

如果您尝试将ID更改为字符串，它应该可以正常工作，即使它看起来像是一个错误：

@Id
@Column(name="PRD_ID")
@GeneratedValue(strategy=GenerationType.IDENTITY)
private String prdId;

Answer 2

你可以这样做：

CREATE TABLE identity_test_tab（ id默认为默认生成的数字，描述VARCHAR2（30））;

SQL＆GT; INSERT INTO identity_test_tab（description）VALUES（'Just DESCRIPTION'）;

创建了一行。

SQL＆GT; INSERT INTO identity_test_tab（id，description）VALUES（999，'ID = 999和DESCRIPTION'）;

创建了一行。

SQL＆GT; INSERT INTO identity_test_tab（id，description）VALUES（NULL，'ID = NULL和DESCRIPTION'）; INSERT INTO identity_test_tab（id，description）VALUES（NULL，'ID = NULL和DESCRIPTION'） * 第1行的错误： ORA-01400：无法插入NULL（“TEST”。“IDENTITY_TEST_TAB”。“ID”）

因为始终标识列的值应为非空

带有Hibernate 5的Oracle 12c Identity列

2 个答案: