SequenceGenerator

```
@Repeatable(SequenceGenerators.class)
@Target({TYPE,METHOD,FIELD,PACKAGE})
@Retention(RUNTIME)
public @interface SequenceGenerator
```
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).
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=SEQUENCE and a defaulted generator name. The name of this default generator is the defaulted generator name, and its other properties are determined by the members of the package SequenceGenerator annotation.
Example: {@snippet :

Since:

1.0

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`int`	`allocationSize`	(Optional) The amount to increment by when allocating sequence numbers from the sequence.
`java.lang.String`	`catalog`	(Optional) The catalog of the sequence generator.
`int`	`initialValue`	(Optional) The value from which the sequence object is to start generating.
`java.lang.String`	`name`	(Optional) A unique generator name that can be referenced by one or more classes to be the generator for primary key values.
`java.lang.String`	`options`	(Optional) A SQL fragment appended to the generated DDL statement which creates this sequence.
`java.lang.String`	`schema`	(Optional) The schema of the sequence generator.
`java.lang.String`	`sequenceName`	(Optional) The name of the database sequence object from which to obtain primary key values.

- Element Detail
  - name
```
java.lang.String name
```
    (Optional) A unique generator name that can be referenced by one or more classes to be the generator for primary key values.
    Defaults to the name of the entity when the annotation occurs on an entity class or primary key attribute.
    
    Default:
    
    ""
- - sequenceName
```
java.lang.String sequenceName
```
    (Optional) The name of the database sequence object from which to obtain primary key values.
    Defaults to a provider-chosen value.
    
    Default:
    
    ""
- - catalog
```
java.lang.String catalog
```
    (Optional) The catalog of the sequence generator.
    
    Since:
    
    2.0
    
    Default:
    
    ""
- - schema
```
java.lang.String schema
```
    (Optional) The schema of the sequence generator.
    
    Since:
    
    2.0
    
    Default:
    
    ""
- - initialValue
```
int initialValue
```
    (Optional) The value from which the sequence object is to start generating.
    
    Default:
    
    1
- - allocationSize
```
int allocationSize
```
    (Optional) The amount to increment by when allocating sequence numbers from the sequence.
    
    Default:
    
    50
- - options
```
java.lang.String options
```
    (Optional) A SQL fragment appended to the generated DDL statement which creates this sequence.
    
    Since:
    
    3.2
    
    Default:
    
    ""