org.hibernate.dialect.OracleDialect does not support identity key generation

oracle 12c dialect
identitycolumnsupportimpl
cannot insert into a generated always identity column jpa
org hibernate dialect sqlserverdialect does not support sequences
hibernate cannot insert into a generated always identity column
oracle10gdialect
hibernate sequence generator not working
hibernate compatibility with oracle 12c

I was trying to import a sample project in to eclipse and was facing the below given error up on running the application.

Caused by: org.hibernate.MappingException: org.hibernate.dialect.OracleDialect does not support identity key generation
    at org.hibernate.dialect.Dialect.getIdentityColumnString(Dialect.java:743)
    at org.hibernate.dialect.Dialect.getIdentityColumnString(Dialect.java:733)
    at org.hibernate.mapping.Table.sqlCreateString(Table.java:426)
    at org.hibernate.cfg.Configuration.generateSchemaCreationScript(Configuration.java:1028)
    at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:125)
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:492)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1744)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1782)
    at org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory(LocalSessionFactoryBuilder.java:247)
    at org.springframework.orm.hibernate4.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:373)
    at org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:358)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1541)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1479)
    ... 32 more

As per this SO link, I have changed the

@GeneratedValue(strategy = GenerationType.IDENTITY)

to

@GeneratedValue(strategy = GenerationType.AUTO) or @GeneratedValue(strategy = GenerationType.TABLE)

But didn't work.

Here is the code:

User.java:

@Entity
@Table(name = "users")
@ManagedBean
@ViewScoped
public class User {

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

    @Column(name = "username", nullable = false)
    private String username;

    @Column(name = "password", nullable = false)
    private String password;

    @Column(name = "role", nullable = false)
    private String role;

    public int getId() {
        return id;
    }

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

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getRole() {
        return role;
    }

    public void setRole(String role) {
        this.role = role;
    }

    }

From the applicationContext.xml:

<!-- Session Factory Declaration -->
<bean id="SessionFactory"
    class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="DataSource" />
    <property name="annotatedClasses">
        <list>
            <value>com.crud.model.User</value>
        </list>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
            <prop key="hibernate.show_sql">true</prop>
            <prop key="hibernate.hbm2ddl.auto">create</prop>

        </props>
    </property>
</bean>

You can use tell Hibernate to use a sequence to generate your ID's

@Id
@Column(name = "ID")
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator = "id_Sequence")
@SequenceGenerator(name = "id_Sequence", sequenceName = "ID_SEQ")
private int id;

This config basically tells Hibernate to use a database sequence called ID_SEQ to generate the ID's for this object. You can specify other sequences on other objects if you want other unique ID's or you can use the same sequence if you want globally unique ID's across your entire system.

The only downside to this is that can't perform batch inserts (without some further config) because Hibernate needs to get the next sequence value from the database every time, and you can't use this config if you want to use a MySQL database, because they don't support sequences.

If any of that doesn't make sense let me know and I'll explain it further.

JPA Oracle Dialect does not support identity key generation??, Dialect does not support identity key generation at org.hibernate.ejb.​AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:216) Oracle dialect does not support identity key generation 576227 Nov 19, 2012 4:28 PM Hello, I'm trying to run an integration tests suite against an Oracle 10g XE database server on a Linux box.

my reputation is too low...

Well, I'm very grateful to JamesENL

I substituted

    @GeneratedValue(strategy = GenerationType.IDENTITY)

by

    @GeneratedValue(strategy=GenerationType.SEQUENCE, generator = "id_Sequence")
    @SequenceGenerator(name = "id_Sequence", sequenceName = "ID_SEQ")`

and that works fine

Is the Oracle 12 'IDENTITY' type supported by Hibernate in JBoss , Oracle added support for the IDENTITY type in Oracle 12c (See the when attempting to create an entity factory using the Oracle dialect(s): Oracle10gDialect does not support identity key generation at org.hibernate.​dialect. does not mention PostgreSQL among the databases that support the "identity" generator. Personally, I use PostgreSQL 7.4.2 and the "seqhilo" generator. Works just fine for me. YMMV.

You can just use @GeneratedValue(strategy = GenerationType.TABLE) if you just need to be able to auto increment the value for attributes such as some ID which is primary key of your table. It worked for me. Hope it helps.

Dialect does not support identity key generation, MappingException: Dialect does not support identity key generation hibernate.​connection.driver_class=org.postgresql.Driver Dialect does not support identity key generation Find more on Hibernate : Dialect does not support identity key generation Or get search suggestion and latest

Instead of IDENTITY use NATIVE and use a sequence with it. Link

Hibernate : Dialect does not support identity key generation, at org.apache.jasper.runtime. MappingException: Dialect does not support identity key generation at net.sf.hibernate.dialect.Dialect. java.lang.IllegalArgumentException: org.hibernate.dialect.identity.IdentityColumnSupportImpl does not support identity key generation I tried this to solve my problem org.hibernate.dialect.OracleDialect does not support identity key generation

The reason for exception is:

Hibernate expects from underlying database to provide an auto increment feature for a given property, in your case it's id. IOW, Oracle(your case) should support auto increment feature for a field. Oracle started to provide auto increment feature with 12c version and, as your version was less, you got that exception .

Oracle dialect does not support identity key generation, Oracle dialect does not support identity key generation - Oracle Database Express <prop key="hibernate.transaction.factory_class">org.hibernate.​transaction. Re: JPA Oracle Dialect does not support identity key generation?? mulation Jul 16, 2009 10:30 AM ( in response to mulation ) Change @GenericGenerator(name = "system-uuid", strategy = "uuid") to @GenericGenerator(name = "system-uuid", strategy = "guid") the lower case problem can be solved also!

Dialect does not support identity key generation, org.springframework.orm.hibernate3.HibernateSystemException: Dialect does not support identity key generation; nested exception is org.hibernate. Do not use this generator with connections enlisted with JTA or with a user-supplied connection. seqhilo uses a hi/lo algorithm to efficiently generate identifiers of type long, short or int, given a named database sequence. uuid.hex uses a 128-bit UUID algorithm to generate identifiers of type string, unique within a network (the IP address is

🧖 ⏯️ 🧝 org.hibernate.dialect.OracleDialect does not support , Org.hibernate.dialect.OracleDialect does not support identity key generation I tried to import a sample project into eclipse and encountered the er I tried changing the dialect from original org.hibernate.dialect.OracleDialect to org.hibernate.dialect.Oracle9Dialect but no change. Im not sure how it worked in old version with "identity" generator class.

generator in hibernate annotations, Oracle doesn't support Identity it will print exception as. * org.hibernate.​MappingException: org.hibernate.dialect.OracleDialect does. * not support identity key generation. */. /*3.@GeneratedValue(strategy=GenerationType. Does the dialect support some form of inserting and selecting the generated IDENTITY value all in the same statement. Methods inherited from class java.lang. Object clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait

Comments
  • remove the close method declaration
  • Did you get this fixed?
  • Not sure why I am getting the same error again, even though we are not using IDENTITY. I'm using Oracle DB
  • Remove the hibernate.dialect line of config. Hibernate will autodetect the dialect to use. I'm pretty sure that the OracleDialect is for much older oracle databases.
  • Throws, Connection cannot be null when 'hibernate.dialect' not set
  • Can you post your dataSource declaration? That error message means that Hibernate can't connect to your database
  • Join us here - chat.stackoverflow.com/rooms/44929/…
  • @All, If you do not specify @SequenceGenerator, sequence name defaults(at least Hibernate) to a value which is specified for generator i.e., id_sequence.
  • @All Addendum to above comment - Also, if there's no generator defined like @org.hibernate.annotations.GenericGenerator.