nested exception is org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'change_type' from result set.

这个异常是MyBatis查询结果集中某个字段不存在导致的。具体原因可能是以下几种情况之一：

1. 数据库表中不存在该字段：检查一下你的数据库表中是否存在该字段，如果不存在，需要在表中添加该字段。

2. 查询语句中的列名与数据库表中的列名不一致：检查一下你的查询语句中是否使用了正确的列名，如果列名不一致，需要在查询语句中修改列名。

3. 数据库中查询的列名与实体类中的属性名不一致：检查一下你的实体类中的属性名是否和数据库表中的列名一致，如果不一致，需要在实体类中添加对应的属性或使用别名映射。

针对这个异常，你可以根据具体的情况进行排查和解决。

相关问题

nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.

nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
Error querying database. Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'com.example.mapper.UserMapper.getUserById'. It's likely that neither a Result Type nor a Result Map was specified.
Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'com.example.mapper.UserMapper.getUserById'. It's likely that neither a Result Type nor a Result Map was specified.

This exception is thrown when there is an issue with executing a query using MyBatis framework. In this case, the nested exception is org.apache.ibatis.exceptions.PersistenceException, which indicates that there was an error querying the database.

The specific error message states that no Result Maps were found for the Mapped Statement 'com.example.mapper.UserMapper.getUserById'. This means that either a Result Type or a Result Map was not specified for the query.

To resolve this issue, you need to make sure that the appropriate Result Type or Result Map is specified for the query in the MyBatis mapping file (XML) or in the annotation-based configuration.

nested exception is org.apache.ibatis.builder.BuilderException: The expression 'array' evaluated to a null value.

引用\[1\]:异常信息： nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'ides'. Return value (806) was not iterable. 引用\[2\]:nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML lo 引用\[3\]:在基于微服务架构风格的项目开发过程中，为了提高快速开发的目的，提高开发效率，集成了 MyBatisPlus，对于 MyBatisPlus 封装的 CRUD API 接口已经非常强大了，但是有时还是需要使用其动态 SQL 的拼接，在编写动态 SQL 时遇到一个梗，异常信息：“异常信息:nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'employee.startDate != null and employee.endDate ! = null'. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: employee.startDate != null and employee.endDate ! = null \[org.apache.ibatis.ognl.ParseException: Encountered " "!" "! "" at line 1, column 53. ”， 。

问题: nested exception is org.apache.ibatis.builder.BuilderException: The expression 'array' evaluated to a null value.
回答: 这个异常信息表明在MyBatis中，表达式'array'的值为null，导致了BuilderException异常。\[1\]这可能是由于代码中的某个地方没有正确地初始化或赋值给'array'变量。要解决这个问题，你需要检查代码中涉及到'array'的部分，并确保它被正确地初始化或赋值。另外，你还可以使用调试工具来跟踪代码并找出导致'array'为null的具体原因。
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