JPA Annotation

SequenceGenerator

Target: TYPE, METHOD, FIELD
Implemented Interfaces:
Annotation
Defines a primary key generator that may be referenced by name when a generator element is specified for the GeneratedValue annotation. A sequence generator may be specified on the entity class or on the primary key field or property. The scope of the generator name is global to the persistence unit (across all generator types). 
Example:
   @SequenceGenerator(name="EMP_SEQ", allocationSize=25)
 
Since:
JPA 1.0
The Auto Generated Values article explains how to use SequenceGenerator.
Public Annotation Attributes
int allocationSize default 50
 (Optional) The amount to increment by when allocating sequence numbers from the sequence.
 
Since:
JPA 1.0
String catalog default ""
 (Optional) The catalog of the sequence generator.
 
Since:
JPA 2.0
int initialValue default 1
 (Optional) The value from which the sequence object is to start generating.
 
Since:
JPA 1.0
String name default null
 (Required) A unique generator name that can be referenced by one or more classes to be the generator for primary key values.
 
Since:
JPA 1.0
String schema default ""
 (Optional) The schema of the sequence generator.
 
Since:
JPA 2.0
String sequenceName default ""
 (Optional) The name of the database sequence object from which to obtain primary key values.
 
 Defaults to a provider-chosen value. 
Since:
JPA 1.0