Starting a new project I'd like to use Hibernate annotations with MySQL instead of the configuration files I've used so far. And I can't seem to find the equivalent of:
<id name="id" type="long" >
<generator class="native"></generator>
</id>
I tried using:
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY, generator = "native")
private long id;
but got:
org.hibernate.AnnotationException: Unknown Id.generator: native
or:
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
Give me:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: PROCEDURE projectName.identity does not exist
Does anyone successfully deployed MySQL and Hibernate3 annotations for automatically generating ids?
Native means Your generator will use identity or sequence columns according to what your current database support.
A generator class is used to generate an ID for an object, which is going to be inserted in the database as a primary key. The ID is a unique identifier for the objects of the persistent class. We can use any generator classes in our application as per our requirements.
SEQUENCE Generation. To use a sequence-based id, Hibernate provides the SequenceStyleGenerator class. This generator uses sequences if our database supports them. It switches to table generation if they aren't supported.
Prior to version 5.0, using the strategy AUTO
was the equivalent of using native
in a mapping. This used the LegacyFallbackInterpreter
:
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
public Long getId() {
return id;
}
Since Hibernate 5.0, the default interpreter is the FallbackInterpeter
which will either use a SEQUENCE generator or TABLE generator depending on the underlying database.
To use the LegacyFallbackInterpreter
, set hibernate.id.new_generator_mappings
to false
.
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