javax.persistence.SequenceGenerator - JPA 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
Learn how to define and use automatic value generation in
Chapter 2 of the ObjectDB/JPA manual.
(Optional) The amount to increment by when allocating sequence numbers from the sequence.
(Optional) The amount to increment by when allocating sequence numbers from the sequence.
- Default value:
- 50
- Since:
- JPA 1.0
(Optional) The catalog of the sequence generator.
(Optional) The catalog of the sequence generator.
- Default value:
- ""
- Since:
- JPA 2.0
(Optional) The value from which the sequence object is to start generating.
(Optional) The value from which the sequence object is to start generating.
- Default value:
- 1
- Since:
- JPA 1.0
(Required) A unique generator name that can be referenced by one or more classes to be the generator for primary key values.
(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
(Optional) The schema of the sequence generator.
(Optional) The schema of the sequence generator.
- Default value:
- ""
- Since:
- JPA 2.0
(Optional) The name of the database sequence object from which to obtain primary key values.
(Optional) The name of the database sequence object from which to obtain primary key values.
Defaults to a provider-chosen value.
- Default value:
- ""
- Since:
- JPA 1.0