hibernate could not get next sequence value

Question

i have gwt application connect to postgres DB at the backend, and a java class \'Judgement\' mapping the table \'judgements\' in DB, when i tried to persistent a judgement i

Answer 1

The Database that we are using should be mentioned under search_path in Postgres SQL Configuration file. This can be done by editing Postgressql configuration file by setting search_path along with database name for example: TESTDB.

1. Find postgressql.conf file under data folder of Postgres SQL datbase.
2. Set search_path = "$user", public, TESTDB;
3. Restart the Postgres SQL service to affect the change.

It worked for me after making the above change.

Answer 2

You need to set your @GeneratedId column with strategy GenerationType.IDENTITY instead of GenerationType.AUTO

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "JUD_ID")
private Long _judId;

Answer 3

I seem to recall having to use @GeneratedValue(strategy = GenerationType.IDENTITY) to get Hibernate to use 'serial' columns on PostgreSQL.

Answer 4

I got same error before, type this query in your database CREATE SEQUENCE hibernate_sequence START WITH 1 INCREMENT BY 1 NOCYCLE;

that's work for me, good luck ~

Answer 5

If using Postgres, create sequence manually with name 'hibernate_sequence'. It will work.

Answer 6

Using the GeneratedValue and GenericGenerator with the native strategy:

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "id_native")
@GenericGenerator(name = "id_native", strategy = "native")
@Column(name = "id", updatable = false, nullable = false)
private Long id;

I had to create a sequence call hibernate_sequence as Hibernate looks up for such a sequence by default:

create sequence hibernate_sequence start with 1 increment by 50;
grant usage, select on all sequences in schema public to my_user_name;