MP提示Closing non transactional SqlSession

这个提示是由于在使用 MyBatis 进行数据库操作时，没有显式地提交或回滚事务而导致的。当执行完数据库操作后，应该调用 `SqlSession` 的 `commit()` 方法来提交事务，或者调用 `rollback()` 方法来回滚事务。如果你的代码中没有使用事务，可以将相关的数据库操作封装在一个事务中，或者在 MyBatis 的配置文件中设置自动提交事务。这样可以避免出现这个警告信息。

相关问题

Closing non transactional SqlSession

As an AI language model, I don't have the context about which programming language you are using for SqlSession. However, in general, it is important to always close non-transactional SqlSession objects to release resources and avoid memory leaks.

Here's an example code snippet in Java using MyBatis to close a non-transactional SqlSession:

SqlSession sqlSession = sqlSessionFactory.openSession();
try {
   // perform database operations here...
} finally {
   sqlSession.close();
}

In this code snippet, we open a new SqlSession using `sqlSessionFactory.openSession()` and perform the database operations inside a try block. After the execution of the try block, we call the `close()` method on the SqlSession object inside a finally block to ensure that it is closed even if there is an exception thrown.

Closing the non-transactional SqlSession in this way ensures that the resources associated with it are released properly and the connection is returned to the connection pool.

springboot项目Closing non transactional SqlSession

在SpringBoot项目中，当执行SQL时出现"Closing non transactional SqlSession"错误，这是因为没有开启事务管理。解决方法如下：
1. 在启动类上添加注解@EnableTransactionManagement。
2. 在需要开启事务的方法上添加注解@Transactional。
3. 在调用该方法的地方进行异常捕捉。

此外，Spring提供了七种事务传播策略，包括REQUIRED、SUPPORTS、MANDATORY、REQUIRES_NEW、NOT_SUPPORTED、NEVER和NESTED。其中，REQUIRED是最常见的选择，它支持当前事务，如果当前没有事务，就新建一个事务。而NESTED是Spring所提供的一个特殊变量，它要求事务管理器或者使用JDBC 3.0 Savepoint API提供嵌套事务行为。