H2 Database not found error: 90146. H2 database is not created on start

Question

Just created a simple spring-boot project from the spring initializer. I went to add a local h2 db for testing and am unable to login. Seems that it cannot create the test d

Answer 1

If you are using spring boot in order to use h2 DB, make sure you have dependencies on your pom.xml file

<dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
     <groupId>com.h2database</groupId>
     <artifactId>h2</artifactId>
     <scope>runtime</scope>
</dependency>

Your application.yml makes it possible to access h2 DB by URI /h2-console preceded by server URL and to connect to DB named "testdb" with username "sa" and no password, after the application has been started on the server.

Answer 2

I had the same error and I found these to be helpful:

Adding a pre-2019 version to the pom.xml file as below:

<dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <version>1.4.193</version>
</dependency>

This fixes the error but isn't the right way to do it. The newer version of H2 Database do not create a new database as it doesn't exist by default and are enabled to false for security purposes.

A better way would be adding making changes to url as:

jdbc:h2:mem:testdb;IFEXISTS=FALSE;

Hope it helps. I made changes in my application.properties file.