【errors】Mapper method attempted to return null from a method with a primitive return type (int).

问题

严重: Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Mapper method 'com.cxx.mapper.MessageMapper.updateStatus attempted to return null from a method with a primitive return type (int).] with root cause
org.apache.ibatis.binding.BindingException: Mapper method 'com.cxx.mapper.MessageMapper.updateStatus attempted to return null from a method with a primitive return type (int).
... ...

xml 如下：

<!--标记消息已读-->
<select id="updateStatus" parameterType="int">
    update message set status = #{param2} where id = #{param1}
</select>

sql 语句，无误，update 语句返回被更新的行数，无误

解决

我坑我自己
update 语句用什么 select 标签！！！！！！！！！！