如何正确配置：spring boot/jpa/hibernate和oracle 19c

Question

I have strange problem. I can't run my spring app when I change connection from MySQL to Oracle (19c). When I am using MySQL everything is fine. My app is really simple, its doing nothing, it is sample empty project for test connection.

Here is my application.properties (MySQL) :

spring.datasource.url=jdbc:mysql://localhost:3306/fckOracle
spring.datasource.username = root
spring.datasource.password = student
spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver

and part of pom.xml (MySQL) ,

<dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
     <scope>runtime</scope>
</dependency>

Here is my application.properties (Oracle 19c)

spring.datasource.url=jdbc:oracle:thin:@localhost:1521:orcl
spring.datasource.username=ALBERT
spring.datasource.password=student
spring.datasource.driver-class-name=oracle.jdbc.OracleDriver

and part of pom.xml (Oracle 19c)

<dependency>
     <groupId>com.oracle.ojdbc</groupId>
     <artifactId>ojdbc8</artifactId>
</dependency>

Okay, when I am trying to run my app with oracle connection, compiler can't load dialect. Program is frozen and localhost:8080 doesn't work, and here is my console:

I have tried a lot of dialects Oracle12cDialect, Oracle10gDialect ..., result is always the same, with one exception! When I change the dialect to this:

spring.jpa.database-platform=org.hibernate.dialect.HSQLDialect

My app starts, but with error:

java.sql.SQLSyntaxErrorException: ORA-00942: table or view does not exist

localhost8080 is working, but I cant do any operation on my oracle database.

Anyone have idea how to fix this oracle configuration?

Answer 1

I have exact same issue, one thing that helps is to use old ojdbc8 driver for oracle DB, so replace your existing one with:

<dependency>
    <groupId>com.oracle.database.jdbc</groupId>
    <artifactId>ojdbc8</artifactId>
    <version>12.2.0.1</version>
</dependency>

But I would love to see the solution for newer drivers, because I have exact same problem and I have to use 19.3.0.0 drivers

Also about this error

java.sql.SQLSyntaxErrorException: ORA-00942: table or view does not exist

Try setting spring.jpa.hibernate.ddl-auto to update or create-drop . This way Hibernate will generate schema and tables automaticaly and also drop them (when used create-drop ). It is especially usefull, when you are still experimenting with model of your application.