Generating identifier with H2 2.0.x

cdl · December 28, 2021, 10:50am

Hi all,

It seems something is broken regarding the generation of identifiers with Hibernate and H2 version 2.0.202 and later.

The symptom and problem are described in the following H2 issue :

github.com/h2database/h2database

Null not allowed for clumn "ID"

opened 01:55PM - 01 Dec 21 UTC

closed 02:09PM - 01 Dec 21 UTC

david-learner

Hi, Entity can't get identifier from h2 sequence at H2 2.0.202 It works at 1.…4.200 2.0.202 doesn't set default expression for generating identifier. is this related to [https://github.com/h2database/h2database/issues/2763](https://github.com/h2database/h2database/issues/2763)? ``` SQL Error: 23502, SQLState: 23502 NULL not allowed for column "ID"; SQL statement: insert into entitya (id, name) values (null, ?) [23502-202] ``` ``` create table entitya ( id bigint generated by default as identity, name varchar(255), primary key (id) ) ``` ``` @Entity public class EntityA { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) Long id; String name; } ```

What do you thing about this issue ? I couldn’t find any Hibernate PR for this.
Do you think opening a PR is appropriate for this problem or am I missing something ?
What should be updated ? the H2Dialect ?

Thanks in advance for any hint

cdl · December 28, 2021, 10:55am

Sorry, I’m replying to myself

It seems a PR exists for this issue (although the problem it fixes is not really explained) :

Topic		Replies	Views
Missing auto generated constraint names on h2 ddl Hibernate ORM	1	47	April 5, 2024
Hybrid ID generation in Hibernate 6.2 is difficult Hibernate ORM	7	1048	April 15, 2024
Second generator using sequence when you have UUID Hibernate ORM	4	240	November 30, 2023
Auto incrementation not working for @Id tagged field Hibernate ORM	19	24789	July 24, 2018
How to write a custom sequence-based String Id generator with JPA and Hibernate Hibernate ORM	10	18496	June 19, 2023

Generating identifier with H2 2.0.x

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