Hibernate: Table generator inserting negative primary keys in table

Question

I am using Table Generator strategy for generating primary keys. Recently I upgraded to Hibernate 5 and i am getting issue of primary keys getting generated negative values. Database: PostgreSQL 9.3, Hibernate 5.0.2

Here are my annotations look like.

@Id
@TableGenerator(name = "EMP_ID",
                table = "ID_GENERATOR",
                pkColumnName = "GEN_KEY",
                valueColumnName = "GEN_VALUE",
                pkColumnValue = "EMP_ID",
                allocationSize = 10,
                initialValue = 1)
@GeneratedValue(strategy = GenerationType.TABLE, generator = "EMP_ID")
@Column(name = "EMP_ID", unique = true, nullable = false)
private long empId;

Can someone please help me out here?

Have you tried allocationSize=1 ? – Jules Oct 20 '16 at 23:01 — Jules, Oct 20 '16 at 23:01

score 0 · Answer 1 · answered Mar 30 '21 at 19:54

Check if GEN_VALUE in database is less than initialValue property in the entity class generate this issue, for example:

If the column value GEN_VALUE is 0 and initialValue is 1, it generates negative value. To Solve the issue, equal initialValue with GEN_VALUE.

Regards,

Hibernate: Table generator inserting negative primary keys in table

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