How to create a table using the data.sql file using spring? - spring

Question

My goal is to create a database using a file, but the application does not respond to it, and if I try to add something to the database, I get an error:
org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "BILLIONAIRE" don't found
And of course the table was not created
application.yml
spring:
datasource:
url: jdbc:h2:mem:test
driverClassName: org.h2.Driver
username: sa
password:
jpa:
database-platform: org.hibernate.dialect.H2Dialect
defer-datasource-initialization: true
hibernate:
ddl-auto: none
data.sql
DROP TABLE IF EXISTS billionaires;
CREATE TABLE billionaires (
id INT AUTO_INCREMENT PRIMARY KEY,
first_name VARCHAR(250) NOT NULL,
last_name VARCHAR(250) NOT NULL,
career VARCHAR(250) DEFAULT NULL
);
INSERT INTO billionaires (first_name, last_name, career) VALUES
('Aliko', 'Dangote', 'Billionaire Industrialist'),
('Bill', 'Gates', 'Billionaire Tech Entrepreneur'),
('Folrunsho', 'Alakija', 'Billionaire Oil Magnate');
model
#Data
#Entity
public class Billionaire {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
private String first_name;
private String last_name;
private String career;
}
Working version
spring:
sql:
init:
mode: always
datasource:
url: jdbc:h2:mem:test
driverClassName: org.h2.Driver
username: sa
password:
jpa:
database-platform: org.hibernate.dialect.H2Dialect
defer-datasource-initialization: true
hibernate:
ddl-auto: none

Answer 1

Hibernate
In addition, a file named import.sql in the root of the classpath is
executed on startup if Hibernate creates the schema from scratch (that
is, if the ddl-auto property is set to create or create-drop). This
can be useful for demos and for testing if you are careful but is
probably not something you want to be on the classpath in production.
It is a Hibernate feature (and has nothing to do with Spring).
Here you need to change ddl-auto property to create or create-drop (then you can delete CREATE TABLE command from .sql file
Basic SQL script
Spring Boot can automatically create the schema (DDL scripts) of your
JDBC DataSource or R2DBC ConnectionFactory and initialize it (DML
scripts). It loads SQL from the standard root classpath locations:
schema.sql and data.sql, respectively. In addition, Spring Boot
processes the schema-${platform}.sql and data-${platform}.sql files
(if present), where platform is the value of spring.sql.init.platform.
This allows you to switch to database-specific scripts if necessary.
For example, you might choose to set it to the vendor name of the
database (hsqldb, h2, oracle, mysql, postgresql, and so on). By
default, SQL database initialization is only performed when using an
embedded in-memory database. To always initialize an SQL database,
irrespective of its type, set spring.sql.init.mode to always.
Similarly, to disable initialization, set spring.sql.init.mode to
never. By default, Spring Boot enables the fail-fast feature of its
script-based database initializer. This means that, if the scripts
cause exceptions, the application fails to start. You can tune that
behavior by setting spring.sql.init.continue-on-error
Here basically you need to add spring.sql.init.platform=h2 to your properties
Many different approaches are listed here:
Data initialization

Answer 2

Place your data.sql under src/main/resource of your project workspace
And Restart your spring application.