Import data at startup Spring boot - spring-boot

Question

I'm trying to launch a SQL file at my database initialization.
Here is my configuration:
spring:
profiles: local
jpa:
properties:
hibernate.temp.use_jdbc_metadata_defaults: false
generate-ddl: true
hibernate:
ddl-auto: update
database: h2
show-sql: true
autoCommit: false
datasource:
platform: h2
url: jdbc:h2:mem:db;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false;
driver-class-name: org.h2.Driver
initialization-mode: always
data: classpath:/sql/CreateGeographicZones.sql
My script is just this line (atm):
INSERT INTO GEOGRAPHIC_ZONE (name) VALUES ('EUROPE');
And the related entity:
#NoArgsConstructor
#Data
#Entity
#Table(name = "GEOGRAPHIC_ZONE")
public class GeographicZone {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "geo_zone_sequence")
#SequenceGenerator(name = "geo_zone_sequence", sequenceName = "geo_zone_id_seq", allocationSize = 1)
#Column(nullable = false)
private Long id;
...
}
The table is created as I can see in the logs:
Hibernate: create table geographic_zone (id bigint not null, name varchar(100) not null, primary key (id))
But I have an SQL error when the script is executed:
Table "GEOGRAPHIC_ZONE" not found; SQL statement:
INSERT INTO GEOGRAPHIC_ZONE (name) VALUES ('EUROPE')
In the logs I can see that my table is created before the script execution, so why it's not working ?

Answer 1

According with your entity's metadata Hibernate is querying geo_zone_id_seq sequence's next value and using it for the ID on each insert.
If you would like to use the same approach when inserting directly in your database then you will need to implement a H2 Trigger
Also you may use either the EntityManager bean or your Spring JPA Repository to insert your data after application startup via CommandLineRunner interface.
Using EntityManager:
#Bean
CommandLineRunner registerZonesDataRunner(EntityManager entityManager, TransactionTemplate transactionTemplate) {
return args -> transactionTemplate.execute(new TransactionCallbackWithoutResult() {
#Override
protected void doInTransactionWithoutResult(TransactionStatus status) {
// presuming that GeographicZone has a constructor expecting NAME
Stream.of("AFRICA", "EUROPE")
.map(GeographicZone::new)
.forEach(entityManager::persist);
}
});
Using Spring JPA Repository:
#Bean
CommandLineRunner registerZonesDataRunner(GeographicZoneRepository repository) {
// presuming that GeographicZone has a constructor expecting NAME
return args -> repository.saveAll(Stream.of("AFRICA", "EUROPE")
.map(GeographicZone::new)
.collector(Collectors.toList()));
}
minimal, reproducible example

Answer 2

You don't show how you've defined the id column but the schema indicates there is no auto-generation scheme. So, try:
INSERT INTO GEOGRAPHIC_ZONE (id, name) VALUES (1, 'EUROPE');
in your data file. If that works, you'll need to either manually set the id in your inserts or add something like #GeneratedValue(strategy = AUTO) to your #Id property.