From a5b200cdd0491ce32fb8c530b403713f6528b8f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dani=C3=ABl=20van=20Eeden?= <github@myname.nl>
Date: Mon, 19 Apr 2021 11:15:53 +0200
Subject: [PATCH] cherry pick #5268 to release-5.0

Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
---
 user-defined-variables.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/user-defined-variables.md b/user-defined-variables.md
index f81304eecaaa6..53bc0392476dd 100644
--- a/user-defined-variables.md
+++ b/user-defined-variables.md
@@ -178,4 +178,8 @@ SELECT @col FROM t;
 +------+
 ```
 
+## MySQL compatibility
+
+Except for `SELECT ... INTO <variable>`, the syntax supported in MySQL and TiDB is identical.
+
 For more information, see [User-Defined Variables in MySQL](https://dev.mysql.com/doc/refman/5.7/en/user-variables.html).