[GitHub] [doris] morningman commented on a diff in pull request #13280: [typo](docs)Modification instructions and examples for adding schema change key columns

[GitBox <gi...@apache.org>]

morningman commented on code in PR #13280:
URL: https://github.com/apache/doris/pull/13280#discussion_r991874787


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docs/zh-CN/docs/advanced/alter-table/schema-change.md:
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@@ -181,6 +181,42 @@ ADD COLUMN k5 INT default "1" to rollup2;
 
 同时，不允许向 Rollup 中加入 Base 表已经存在的列。如果用户需要这样做，可以重新建立一个包含新增列的 Rollup，之后再删除原 Rollup。
 
+### 修改 Key 列
+
+修改表的 Key 列是通过 `key` 关键字完成，下面我们通过一个例子来看。

Review Comment:
   这个用法只针对 duplicate key 表的key列，即排序列的修改。其他data model 的表不需要这个写法。



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