testCompile group: 'com.h2database', name: 'h2', version: '1.4.197'

runtime('org.hsqldb:hsqldb')

#spring.datasource.driver-class-name=org.h2.Driver
#spring.dataSource.url=jdbc:h2:mem:testdb
#spring.dataSource.username=sa
#spring.dataSource.password=

spring.h2.console.enabled=true

spring.jpa.properties.hibernate.generate_statistics=true
logging.level.org.hibernate.stat=debug

spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true
logging.level.org.hibernate.type=trace

CREATE TABLE number_entity(
  name VARCHAR (30),
  value INTEGER (10)
);

INSERT INTO number_entity
VALUES ('test1', 2);

INSERT INTO number_entity
VALUES ('test2', 3);

Hibernate:

    drop table number_entity if exists
Hibernate:

    create table number_entity (
       name varchar(255) not null,
        value integer,
        primary key (name)
    )

@Entity
@Table(name = "number_entity")
public class NumberEntity {

    @Id
    @Column(name = "name")
    private String name;

    @Column(name = "value")
    private int value;

    // constructors, getters and setters //

}