From 326d765c640a4fa2da64ef04bc5171377688b4ee Mon Sep 17 00:00:00 2001
From: lichaoyong <lichaoyong@baidu.com>
Date: Thu, 8 Aug 2019 16:47:32 +0800
Subject: [PATCH] Add doc of modify replication num upon partition (#1611)

---
 .../sql-statements/Data Definition/ALTER TABLE.md     | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/docs/documentation/cn/sql-reference/sql-statements/Data Definition/ALTER TABLE.md b/docs/documentation/cn/sql-reference/sql-statements/Data Definition/ALTER TABLE.md
index e6a8099b18..e967d3732b 100644
--- a/docs/documentation/cn/sql-reference/sql-statements/Data Definition/ALTER TABLE.md	
+++ b/docs/documentation/cn/sql-reference/sql-statements/Data Definition/ALTER TABLE.md	
@@ -146,7 +146,16 @@
         ADD PARTITION p1 VALUES LESS THAN ("2015-01-01")
         DISTRIBUTED BY HASH(k1) BUCKETS 20;
 
-    3. 删除分区
+    3. 增加分区，使用新的副本数
+        ALTER TABLE example_db.my_table
+        ADD PARTITION p1 VALUES LESS THAN ("2015-01-01")
+        ("replication_num"="1");
+
+    4. 修改分区副本数
+        ALTER TABLE example_db.my_table
+        MODIFY PARTITION p1 SET("replication_num"="1");
+
+    5. 删除分区
         ALTER TABLE example_db.my_table
         DROP PARTITION p1;