Oracle 12c Identity column with Hibernate 5 - spring

Question

I am trying to use Oracle 12c Identity column feature with Hibernate-5.0.0.CR4. I have used the following properties in Spring boot application.properties:
spring.jpa.hibernate.dialect=org.hibernate.dialect.Oracle12cDialect
spring.datasource.driverClassName=oracle.jdbc.OracleDriver
From the source code of Oracle12cDialect, it seemed like it supports identity column. But I am getting the following error while trying to insert a record into a table called user_preferences:
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;
}
}
Exception that I am getting:
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)
Please let me know if there is way to use identity column without using database sequences.

Answer 1

It seems that Hibernate 5.0.X does a query trying to get the ID value from the database when you specify GenerationType.IDENTITY. This value is retrieved from a java ResultSet using an appropriate getXXX depending on the type you used to declare your ID. Either resultSet.getString(columnIndex) or resultSet.getRowId(columnIndex) work in my case but RowId cannot be used in a JPA bean.
If you try changing it ID to string it should work, even though it looks like a bug to me:
#Id
#Column(name="PRD_ID")
#GeneratedValue(strategy=GenerationType.IDENTITY)
private String prdId;

Answer 2

you can do it as below:
CREATE TABLE identity_test_tab (
id NUMBER GENERATED BY DEFAULT AS IDENTITY,
description VARCHAR2(30)
);
SQL> INSERT INTO identity_test_tab (description) VALUES ('Just DESCRIPTION');
1 row created.
SQL> INSERT INTO identity_test_tab (id, description) VALUES (999, 'ID=999 and DESCRIPTION');
1 row created.
SQL> INSERT INTO identity_test_tab (id, description) VALUES (NULL, 'ID=NULL and DESCRIPTION');
INSERT INTO identity_test_tab (id, description) VALUES (NULL, 'ID=NULL and DESCRIPTION')
*
ERROR at line 1:
ORA-01400: cannot insert NULL into ("TEST"."IDENTITY_TEST_TAB"."ID")
since always identity column should have value not null