Manually specify the value of a primary key in JPA @GeneratedValue column

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This works with eclipselink. It will create a seperate table for the sequence, but that shouldn’t pose a problem.

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(name="id", insertable=true, updatable=true, unique=true, nullable=false)
private Long id;

GenerationType.AUTO will choose the ideal generation strategy. Since the field is specified as insertable and updateable, a TABLE generation strategy will be used. This means eclipselink will generate another table holding the current sequence value and generate the sequence itself instead of delegating it to the database. Since the column is declared insertable, if id is null when persisting, eclipselink will generate the id. Otherwise the existing id will be used.

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