seawinde commented on code in PR #20673:
URL: https://github.com/apache/doris/pull/20673#discussion_r1379542915
##########
docs/zh-CN/docs/sql-manual/sql-reference/Data-Definition-Statements/Alter/ALTER-MATERIALIZED.md:
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@@ -0,0 +1,66 @@
+---
+{
+ "title": "ALTER-MATERIALIZED",
+ "language": "zh-CN"
+}
+---
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied. See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+## ALTER-MATERIALIZED
+
+### Name
+
+ALTER MATERIALIZED VIEW
+
+### Description
+
+该语句用可以变更多表物化视图的刷新策略
+
+语法：
+
+```sql
+ALTER MATERIALIZED VIEW mv_name mv_refersh_info;
+```
+
+说明：
+
+1. mv_name： 待变更的物化视图的名称。
+2.
mv_refersh_info：新的刷新机制，详细信息请见[创建物化视图参数](../Create/CREATE-MATERIALIZED-VIEW.md)
+
+### Example
+
+1. 设置指定物化视图为手动刷新
+```sql
+ALTER MATERIALIZED VIEW example_mv REFRESH COMPLETE ON DEMAND;
+```
+
+2. 设置指定物化视图间隔两天全量刷新一次
+```sql
+alter MATERIALIZED VIEW example_mv REFRESH COMPLETE start with "2022-11-03
00:00:00" next 2 DAY
Review Comment:
RefreshMethod 'COMPLETE' and Schedule '2022-11-03 00:00:00' should both set
when alter, could we suppport to alter one of them once?
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