Error executing DDL "create table users (...)" via JDBC Statement - spring

Question

I am trying to learn how to use the H2 database in my Spring Boot application but am running into trouble with respect to creating a table representing the defined entity located in User.kt. Seemingly the table creation fails and as such the data insertion from data.sql reasonably so also fails. I don't understand what I am doing wrong.
I am not sure if it's relevant or not but I have googled around for a while to try and solve this and came across some comment or two somewhere saying something about "If you are using Spring Security then you need to do some more configuring in order to use H2" but the people didn't go into any further detail. Googling about this has not yielded anything useful for me. I did see some concrete examples that used some kind of class that extended WebSecurityConfigurerAdapter to configure some kind of HTTP security thing regarding CSRF but that (interface) is now deprecated and I couldn't find any "up to date" example.
I am indeed using Spring Security and have yet to actually touch it as I have yet to learn about it, I am focusing on getting up the database first. Do I need to do anything with that in order to make the database work?
application.properties
spring.datasource.url=jdbc:h2:mem:appdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE;DATABASE_TO_UPPER=false
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.jpa.defer-datasource-initialization=true
spring.h2.console.enabled=true
User.kt
#Entity
#Data
#NoArgsConstructor
#AllArgsConstructor
#Table(name = "users")
open class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id", nullable = false)
open var id: Long = 1;
#Column(name = "username'", nullable = false)
open var username: String = ""
#Column(name = "pwd", nullable = false)
open var password: String = ""
}
data.sql
INSERT INTO users (username, pwd)
VALUES ('user1', '123'),
('user2', '123'),
('user3', '123');
Stacktrace
2022-06-21 12:23:41.352 INFO 1780 --- [ restartedMain] com.name.news.app.ApplicationKt : No active profile set, falling back to 1 default profile: "default"
2022-06-21 12:23:41.387 INFO 1780 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2022-06-21 12:23:41.387 INFO 1780 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2022-06-21 12:23:41.750 INFO 1780 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2022-06-21 12:23:41.780 INFO 1780 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 25 ms. Found 1 JPA repository interfaces.
2022-06-21 12:23:42.214 INFO 1780 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8082 (http)
2022-06-21 12:23:42.221 INFO 1780 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2022-06-21 12:23:42.222 INFO 1780 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.63]
2022-06-21 12:23:42.275 INFO 1780 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2022-06-21 12:23:42.275 INFO 1780 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 887 ms
2022-06-21 12:23:42.297 INFO 1780 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2022-06-21 12:23:42.424 INFO 1780 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2022-06-21 12:23:42.431 INFO 1780 --- [ restartedMain] o.s.b.a.h2.H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:appdb'
2022-06-21 12:23:42.524 INFO 1780 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2022-06-21 12:23:42.555 INFO 1780 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.9.Final
2022-06-21 12:23:42.651 INFO 1780 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2022-06-21 12:23:42.714 INFO 1780 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2022-06-21 12:23:43.036 WARN 1780 --- [ restartedMain] o.h.t.s.i.ExceptionHandlerLoggedImpl : GenerationTarget encountered exception accepting command : Error executing DDL "create table users (id bigint not null, pwd varchar(
255) not null, username' varchar(255) not null, primary key (id))" via JDBC Statement
org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "create table users (id bigint not null, pwd varchar(255) not null, username' varchar(255) not null, primary key (id))" via JDBC Statement
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:458) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:442) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:325) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:169) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:138) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:124) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:168) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:85) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:335) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:471) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1498) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.3.20.jar:5.3.20]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.20.jar:5.3.20]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.20.jar:5.3.20]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.20.jar:5.3.20]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) ~[spring-boot-2.7.0.jar:2.7.0]
at com.name.news.app.ApplicationKt.main(Application.kt:12) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.7.0.jar:2.7.0]
Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Syntax error in SQL statement "create table users (id bigint not null, pwd varchar(255) not null, username[*]' varchar(255) not null, primary key (id))"; SQL statement:
create table users (id bigint not null, pwd varchar(255) not null, username' varchar(255) not null, primary key (id)) [42000-212]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:502) ~[h2-2.1.212.jar:2.1.212]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:477) ~[h2-2.1.212.jar:2.1.212]
at org.h2.message.DbException.get(DbException.java:223) ~[h2-2.1.212.jar:2.1.212]
at org.h2.message.DbException.get(DbException.java:199) ~[h2-2.1.212.jar:2.1.212]
at org.h2.message.DbException.getSyntaxError(DbException.java:247) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Tokenizer.readCharacterString(Tokenizer.java:1098) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Tokenizer.tokenize(Tokenizer.java:226) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.initialize(Parser.java:5848) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.parse(Parser.java:657) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.prepareCommand(Parser.java:568) ~[h2-2.1.212.jar:2.1.212]
at org.h2.engine.SessionLocal.prepareLocal(SessionLocal.java:631) ~[h2-2.1.212.jar:2.1.212]
at org.h2.engine.SessionLocal.prepareCommand(SessionLocal.java:554) ~[h2-2.1.212.jar:2.1.212]
at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1116) ~[h2-2.1.212.jar:2.1.212]
at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:237) ~[h2-2.1.212.jar:2.1.212]
at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:223) ~[h2-2.1.212.jar:2.1.212]
at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:94) ~[HikariCP-4.0.3.jar:na]
at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) ~[HikariCP-4.0.3.jar:na]
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ~[hibernate-core-5.6.9.Final.jar:5.6.9.Final]
... 39 common frames omitted
2022-06-21 12:23:43.046 INFO 1780 --- [ restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2022-06-21 12:23:43.083 INFO 1780 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2022-06-21 12:23:43.130 WARN 1780 --- [ restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly config
ure spring.jpa.open-in-view to disable this warning
2022-06-21 12:23:43.235 INFO 1780 --- [ restartedMain] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page template: index
2022-06-21 12:23:43.644 WARN 1780 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationExce
ption: Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Invocation of init method faile
d; nested exception is org.springframework.jdbc.datasource.init.ScriptStatementFailedException: Failed to execute SQL script statement #1 of URL [file:/D:/Documents/Programming/news.app/target/classes/data.sql]: INSERT INTO users (u
sername, pwd) VALUES ('user1', '123'), ('user1', '123'), ('user1', '123'); nested exception is org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "users" not found (this database is empty); SQL statement:
INSERT INTO users (username, pwd) VALUES ('user1', '123'), ('user1', '123'), ('user1', '123') [42104-212]
2022-06-21 12:23:43.645 INFO 1780 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2022-06-21 12:23:43.645 INFO 1780 --- [ restartedMain] .SchemaDropperImpl$DelayedDropActionImpl : HHH000477: Starting delayed evictData of schema as part of SessionFactory shut-down'
2022-06-21 12:23:43.855 WARN 1780 --- [ restartedMain] o.s.b.f.support.DisposableBeanAdapter : Invocation of destroy method failed on bean with name 'inMemoryDatabaseShutdownExecutor': org.h2.jdbc.JdbcSQLNonTransientConnectionE
xception: Database is already closed (to disable automatic closing at VM shutdown, add ";DB_CLOSE_ON_EXIT=FALSE" to the db URL) [90121-212]
2022-06-21 12:23:43.856 INFO 1780 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2022-06-21 12:23:43.857 INFO 1780 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
2022-06-21 12:23:43.859 INFO 1780 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2022-06-21 12:23:43.869 INFO 1780 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-06-21 12:23:43.882 ERROR 1780 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationCon
figuration.class]: Invocation of init method failed; nested exception is org.springframework.jdbc.datasource.init.ScriptStatementFailedException: Failed to execute SQL script statement #1 of URL [file:/D:/Documents/Programming/news.
app/target/classes/data.sql]: INSERT INTO users (username, pwd) VALUES ('user1', '123'), ('user1', '123'), ('user1', '123'); nested exception is org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "users" not found (this database is empt
y); SQL statement:
INSERT INTO users (username, pwd) VALUES ('user1', '123'), ('user1', '123'), ('user1', '123') [42104-212]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) ~[spring-boot-2.7.0.jar:2.7.0]
at com.name.news.app.ApplicationKt.main(Application.kt:12) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.7.0.jar:2.7.0]
Caused by: org.springframework.jdbc.datasource.init.ScriptStatementFailedException: Failed to execute SQL script statement #1 of URL [file:/D:/Documents/Programming/news.app/target/classes/data.sql]: INSERT INTO users (username, pwd
) VALUES ('user1', '123'), ('user1', '123'), ('user1', '123'); nested exception is org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "users" not found (this database is empty); SQL statement:
INSERT INTO users (username, pwd) VALUES ('user1', '123'), ('user1', '123'), ('user1', '123') [42104-212]
at org.springframework.jdbc.datasource.init.ScriptUtils.executeSqlScript(ScriptUtils.java:282) ~[spring-jdbc-5.3.20.jar:5.3.20]
at org.springframework.jdbc.datasource.init.ResourceDatabasePopulator.populate(ResourceDatabasePopulator.java:254) ~[spring-jdbc-5.3.20.jar:5.3.20]
at org.springframework.jdbc.datasource.init.DatabasePopulatorUtils.execute(DatabasePopulatorUtils.java:54) ~[spring-jdbc-5.3.20.jar:5.3.20]
at org.springframework.boot.jdbc.init.DataSourceScriptDatabaseInitializer.runScripts(DataSourceScriptDatabaseInitializer.java:90) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.runScripts(AbstractScriptDatabaseInitializer.java:145) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.applyScripts(AbstractScriptDatabaseInitializer.java:107) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.applyDataScripts(AbstractScriptDatabaseInitializer.java:101) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.initializeDatabase(AbstractScriptDatabaseInitializer.java:76) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer.afterPropertiesSet(AbstractScriptDatabaseInitializer.java:65) ~[spring-boot-2.7.0.jar:2.7.0]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.20.jar:5.3.20]
... 23 common frames omitted
Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "users" not found (this database is empty); SQL statement:
INSERT INTO users (username, pwd) VALUES ('user1', '123'), ('user1', '123'), ('user1', '123') [42104-212]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:502) ~[h2-2.1.212.jar:2.1.212]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:477) ~[h2-2.1.212.jar:2.1.212]
at org.h2.message.DbException.get(DbException.java:223) ~[h2-2.1.212.jar:2.1.212]
at org.h2.message.DbException.get(DbException.java:199) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.getTableOrViewNotFoundDbException(Parser.java:8363) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.getTableOrViewNotFoundDbException(Parser.java:8347) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.readTableOrView(Parser.java:8336) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.readTableOrView(Parser.java:8306) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.parseInsert(Parser.java:1641) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.parsePrepared(Parser.java:814) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.parse(Parser.java:691) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.parse(Parser.java:661) ~[h2-2.1.212.jar:2.1.212]
at org.h2.command.Parser.prepareCommand(Parser.java:568) ~[h2-2.1.212.jar:2.1.212]
at org.h2.engine.SessionLocal.prepareLocal(SessionLocal.java:631) ~[h2-2.1.212.jar:2.1.212]
at org.h2.engine.SessionLocal.prepareCommand(SessionLocal.java:554) ~[h2-2.1.212.jar:2.1.212]
at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1116) ~[h2-2.1.212.jar:2.1.212]
at org.h2.jdbc.JdbcStatement.executeInternal(JdbcStatement.java:237) ~[h2-2.1.212.jar:2.1.212]
at org.h2.jdbc.JdbcStatement.execute(JdbcStatement.java:223) ~[h2-2.1.212.jar:2.1.212]
at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:94) ~[HikariCP-4.0.3.jar:na]
at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) ~[HikariCP-4.0.3.jar:na]
at org.springframework.jdbc.datasource.init.ScriptUtils.executeSqlScript(ScriptUtils.java:261) ~[spring-jdbc-5.3.20.jar:5.3.20]
... 33 common frames omitted

Answer 1

You need to remove ' from column name:
#Column(name = "username'", nullable = false)
->
#Column(name = "username", nullable = false)
DATABASE_TO_UPPER=FALSE also looks very suspicious, this setting should normally be used only with H2 1.4.197 and older versions, but this isn't related to your problem.