Database not found, and IFEXISTS=true, so we cant auto-create it

Question

I am getting error after opening the h2 database console. I enter database name but it is showing database not found error:

Database \"C:/Users/Barlek

Answer 1

If you are dealing with the Spring Boot project, please change the JDBC URL jdbc:h2:~/test to jdbc:h2:mem:testdb in the login page, which is the default URL configured by Spring Boot.

Answer 2

enter image description here

Maven dependency

        <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <scope>runtime</scope>
    </dependency>

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

MacOS Catalina 10.15.4 Worked!

Answer 3

Problem:

Database not found or test folder not in c:/user/username/test

Copy&paste it in application.properties file:

spring.datasource.url=jdbc:h2:~/test
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect

Issue was of URL, check it. Problem solved.

Answer 4

By degrading the version, the H2 DB is working but table i am unable to see. Code snippet

Controller

@RestController
public class CurrencyExchangeController {

    @Autowired
    private Environment env;
    @GetMapping("/currency-exchange/from/{from}/to/{to}")
    public CurrencyExchange retriveCurrencyExchange(@PathVariable String from,@PathVariable String to)
    {
        CurrencyExchange currencyExchange = new CurrencyExchange(1000L, from, to, BigDecimal.valueOf(65));
        currencyExchange.setPort(Integer.parseInt(env.getProperty("local.server.port")));
        return currencyExchange;

    }

POJO

@Entity
public class CurrencyExchange {
    @Id
    private Long id;
    @Column(name ="currency_from")
    private String from;
    @Column(name ="currency_to")
    private String to;
    @Column(name ="conversion_multiple")
    private BigDecimal conversion;
    private int port;

Spring boot main

@SpringBootApplication
@ComponentScan(basePackages = {"com.example"})
public class CurrencyExchangeServiceApplication {

    public static void main(String[] args) throws SQLException {
        SpringApplication.run(CurrencyExchangeServiceApplication.class, args);

    }

app.prop

spring.application.name=currency-exchange-service
server.port=8000

spring.jpa.show-sql=true
spring.h2.console.enabled=true

data.sql file
insert into currency_exchange(id,currency_from,currency_to,conversion_multiple,port)
values(1001,'USD','INR',65,0);
insert into currency_exchange(id,currency_from,currency_to,conversion_multiple,port)
values(1002,'EUR','INR',75,0);

Answer 5

I also got this Error. You have to Configured 

*application.properties*

    # temporary data storage
    spring.datasource.url = jdbc:h2:file:C:/data/test (Windows only)
    spring.h2.console.path=/h2
    server.port=8181

You have to create Folder in C: Drive data/test

Go To Browser:

    http://localhost:8181/h2

Then URL:

    jdbc:h2:file:C:/data/test

You Can See in this pic also: [1]

  [1]: https://i.stack.imgur.com/ExFNR.png

You can see youtube Video

https://youtu.be/yYWPuM8k8K4

Answer 6

Have you upgraded H2 recently? This could be the cause.

This is related to the following H2 commit:

https://github.com/h2database/h2database/commit/8b53f3999c6c5c3d5ca29020e2657968f4f59ec4

and the change was made because of this exploit:

https://www.exploit-db.com/exploits/45506

This means that the default for H2 is now to not auto-create databases when run in standalone network mode.

If you have read and understood the above, and you still want to allow the database to be auto-created, then just add the -ifNotExists flag to your h2 start command like this:

java -cp h2*.jar org.h2.tools.Server -ifNotExists