From 2b64ff68cc375b5688174b4087bf44be9edd2558 Mon Sep 17 00:00:00 2001
From: Markus Gerards <mail@markus-gerards.de>
Date: Wed, 7 Sep 2016 13:43:51 +0200
Subject: [PATCH] Fixed #27180 -- Fixed a crash in MySQL checks where SELECT
 @@sql_mode doesn't return a result.

---
 django/db/backends/mysql/validation.py | 2 +-
 docs/releases/1.10.2.txt               | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/django/db/backends/mysql/validation.py b/django/db/backends/mysql/validation.py
index e62a6e4c7e4..5a50663dd23 100644
--- a/django/db/backends/mysql/validation.py
+++ b/django/db/backends/mysql/validation.py
@@ -13,7 +13,7 @@ class DatabaseValidation(BaseDatabaseValidation):
         with self.connection.cursor() as cursor:
             cursor.execute("SELECT @@sql_mode")
             sql_mode = cursor.fetchone()
-        modes = set(sql_mode[0].split(','))
+        modes = set(sql_mode[0].split(',') if sql_mode else ())
         if not (modes & {'STRICT_TRANS_TABLES', 'STRICT_ALL_TABLES'}):
             return [checks.Warning(
                 "MySQL Strict Mode is not set for database connection '%s'" % self.connection.alias,
diff --git a/docs/releases/1.10.2.txt b/docs/releases/1.10.2.txt
index 4154836a1d3..f3c574d7d1c 100644
--- a/docs/releases/1.10.2.txt
+++ b/docs/releases/1.10.2.txt
@@ -9,4 +9,5 @@ Django 1.10.2 fixes several bugs in 1.10.1.
 Bugfixes
 ========
 
-* ...
+* Fixed a crash in MySQL database validation where ``SELECT @@sql_mode``
+  doesn't return a result (:ticket:`27180`).