在Hibernate中实施MariaDB是否有问题?

时间:2019-04-08 14:09:05

标签: java hibernate spring-boot mariadb

我目前正在使用Hibernate,Spring Boot和MariaDB实现应用程序。与数据库的连接如下:

application.yml ---------------------
spring:
  jpa:
    hibernate:
      ddl-auto: create-drop
      default_schema: mydb
  datasource:
    platform: mariadb
    driver-class-name: org.mariadb.jdbc.Driver
    url: jdbc:mariadb://localhost:3306/mydb
    username: mydb
    password: mysecretpassword
    initialization-mode: always

对象定义如下:

MyObject.java ----------------------
@Entity
@Table(name = "my_object", schema = "otherdb")
public class MyObject {
...
}

此外,我还定义了一个SQL文件,以确保两个使用的模式都存在:

schema.sql ---------------------------
CREATE SCHEMA IF NOT EXISTS  mydb;
CREATE SCHEMA IF NOT EXISTS  otherdb;

在内存中的HSQLDB上运行此命令非常正常,我收到如下消息:

...
2019-03-29 13:23:24.978  INFO 15876 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
Hibernate: drop table otherdb.my_object if exists
...

但是当我在application.yml中切换到MariaDB时,出现了如下错误消息:

2019-03-29 14:27:09.166  INFO 2084 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
Hibernate: drop table if exists my_object
2019-03-29 14:27:10.889  WARN 2084 --- [           main] o.h.t.s.i.ExceptionHandlerLoggedImpl     : GenerationTarget encountered exception accepting command : Error executing DDL "drop table if exists my_object" via JDBC Statement
org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "drop table if exists my_object" via JDBC Statement
...
Caused by: java.sql.SQLException: (conn=250) No database selected
    at org.mariadb.jdbc.internal.util.exceptions.ExceptionMapper.get(ExceptionMapper.java:258) ~[mariadb-java-client-2.3.0.jar:na]
...
Caused by: java.sql.SQLException: No database selected
Query is: drop table if exists my_object
java thread: main
...

请注意,模式名称在SQL命令中消失了。从我的角度来看,这会导致问题。

有没有办法解决此问题?

我前一阵子已经在休眠网站上报告了这个问题,但是看起来他们似乎太忙了,无法回答用户的问题/错误报告...:-(

https://discourse.hibernate.org/t/problem-in-mariadb-implementation/2531

感谢您的帮助!

0 个答案:

没有答案