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fix(mybatis): correcting the description of namespace in the mybatis #2858

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fix(mybatis): correcting the description of namespace in the mybatis #2858

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4 changes: 2 additions & 2 deletions docs/system-design/framework/mybatis/mybatis-interview.md
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Expand Up @@ -248,9 +248,9 @@ MyBatis 提供了 9 种动态 sql 标签:

注：我出的。

答：不同的 xml 映射文件，如果配置了 namespace，那么 id 可以重复；如果没有配置 namespace，那么 id 不能重复；毕竟 namespace 不是必须的，只是最佳实践而已。
答：不同的 xml 映射文件，id 可以重复。

原因就是 namespace+id 是作为 `Map<String, MappedStatement>` 的 key 使用的，如果没有 namespace，就剩下 id，那么，id 重复会导致数据互相覆盖。有了 namespace，自然 id 就可以重复，namespace 不同，namespace+id 自然也就不同。
原因就是 namespace+id 是作为 `Map<String, MappedStatement>` 的 key 使用的，如果 namespace 不同，即使 id 重复，key (namespace+id) 也是不同的。

### MyBatis 中如何执行批处理？

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