From 001bb1424a30fc6c741400536975f8c91dc13d0a Mon Sep 17 00:00:00 2001
From: jasongao <gaoriyao@126.com>
Date: Sun, 2 Sep 2018 21:35:32 +0800
Subject: [PATCH] docs: add sql syntax description 'SHOW COLUMNS FROM
 [DB.]TABLE'

---
 docs/radon_sql_support.md | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/docs/radon_sql_support.md b/docs/radon_sql_support.md
index 46ee41f2..b643b6e5 100644
--- a/docs/radon_sql_support.md
+++ b/docs/radon_sql_support.md
@@ -30,6 +30,7 @@ Contents
       * [SHOW ENGINES](#show-engines)
       * [SHOW DATABASES](#show-databases)
       * [SHOW TABLES](#show-tables)
+      * [SHOW COLUMNS](#show-columns)
       * [SHOW CREATE TABLE](#show-create-table)
       * [SHOW PROCESSLIST](#show-processlist)
       * [SHOW VARIABLES](#show-variables)
@@ -658,6 +659,34 @@ mysql> SHOW TABLES;
 2 rows in set (0.01 sec)
 ```
 
+### SHOW COLUMNS
+
+`Syntax`
+
+```
+SHOW COLUMNS FROM [db_name.]table_name
+```
+
+`Instructions`
+* Get the column definitions of a table
+
+`Example: `
+
+```
+mysql> CREATE TABLE T1(A INT, B VARCHAR(10)) PARTITION BY HASH(A);
+Query OK, 0 rows affected (0.52 sec)
+
+mysql> SHOW COLUMNS FROM T1;
++-------+-------------+------+-----+---------+-------+
+| Field | Type        | Null | Key | Default | Extra |
++-------+-------------+------+-----+---------+-------+
+| A     | int(11)     | YES  |     | NULL    |       |
+| B     | varchar(10) | YES  |     | NULL    |       |
++-------+-------------+------+-----+---------+-------+
+2 rows in set (0.01 sec)
+
+```
+
 ### SHOW CREATE TABLE
 
 `Syntax`