From 702a35c95d53d6972ef212e86a8d19bda794c7d3 Mon Sep 17 00:00:00 2001
From: Morgan Tocker <tocker@gmail.com>
Date: Tue, 29 Jun 2021 01:57:25 -0600
Subject: [PATCH] system-variables: add datadir and license (#5761)

---
 system-variables.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/system-variables.md b/system-variables.md
index f67a989b3269d..a9cf9acd24cc5 100644
--- a/system-variables.md
+++ b/system-variables.md
@@ -89,6 +89,13 @@ mysql> SELECT * FROM t1;
 - Default value：1000
 - Controls the maximum recursion depth in Common Table Expressions.
 
+### datadir
+
+- Scope: NONE
+- Default value: /tmp/tidb
+- This variable indicates the location where data is stored. This location can be a local path or point to a PD server if the data is stored on TiKV.
+- A value in the format of `ip_address:port` indicates the PD server that TiDB connects to on startup.
+
 ### ddl_slow_threshold
 
 - Scope: INSTANCE
@@ -140,6 +147,12 @@ mysql> SELECT * FROM t1;
 - Default value: `OFF`
 - This variable is used to show whether the execution plan used in the previous `execute` statement is taken directly from the plan cache.
 
+### license
+
+- Scope: NONE
+- Default value: Apache License 2.0
+- This variable indicates the license of your TiDB server installation.
+
 ### max_execution_time
 
 - Scope: SESSION | GLOBAL