JPA Annotation

TableGenerator

Target: TYPE, METHOD, FIELD, PACKAGE
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 table 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).

If no name is explicitly specified, and the annotation occurs on an entity class or primary key attribute of an entity class, then the name defaults to the name of the entity.

If no name is explicitly specified, and the annotation occurs on a package descriptor, then the annotation defines a recipe for producing a default generator when a GeneratedValue annotation of any program element in the annotated package has strategy=TABLE and a defaulted plain. The name of this default generator is the defaulted generator name, and its other properties are determined by the members of the package TableGenerator annotation.

Example 1:

 {@snippet :
See Also:
GeneratedValue
Since:
JPA 1.0
The Auto Generated Values article explains how to use TableGenerator.

Public Annotation Attributes

int allocationSize default 50
(Optional) The amount to increment by when allocating id numbers from the generator.
Since:
JPA 1.0
String catalog default ""
(Optional) The catalog of the table.

Defaults to the default catalog.

Since:
JPA 1.0
Index[] indexes default {}
(Optional) Indexes for the table.
These are only used if table generation is in effect. Note that it is not necessary to specify an index for a primary key, as the primary key index is created automatically.
Since:
JPA 2.1
int initialValue default 0
(Optional) The initial value to be used to initialize the column that stores the last value generated.
Since:
JPA 1.0
String name default ""
(optional) A unique generator name that can be referenced by one or more classes to be the generator for id values.

Defaults to the name of the entity when the annotation occurs on an entity class or primary key attribute.

Since:
JPA 1.0
String options default ""
(Optional) A SQL fragment appended to the generated DDL statement which creates this table.
Since:
JPA 3.2
String pkColumnName default ""
(Optional) Name of the primary key column in the table.

Defaults to a provider-chosen name.

Since:
JPA 1.0
String pkColumnValue default ""
(Optional) The primary key value in the generator table that distinguishes this set of generated values from others that may be stored in the table.

Defaults to a provider-chosen value to store in the primary key column of the generator table

Since:
JPA 1.0
String schema default ""
(Optional) The schema of the table.

Defaults to the default schema for user.

Since:
JPA 1.0
String table default ""
(Optional) Name of the table that stores the generated id values.

Defaults to a name chosen by persistence provider.

Since:
JPA 1.0
UniqueConstraint[] uniqueConstraints default {}
(Optional) Unique constraints that are to be placed on the table.
These are only used if table generation is in effect. These constraints apply in addition to primary key constraints.

Defaults to no additional constraints.

Since:
JPA 1.0
String valueColumnName default ""
(Optional) Name of the column that stores the last value generated.

Defaults to a provider-chosen name.

Since:
JPA 1.0