Fixed #26991 -- Fixed a crash in MySQL where SQL_AUTO_IS_NULL doesn't return a result.

timgraham · web-flow · commit d95c669c29a0 · 2016-08-02T10:52:31.000-04:00
diff --git a/django/db/backends/mysql/features.py b/django/db/backends/mysql/features.py
@@ -75,4 +75,5 @@ def introspected_boolean_field_type(self, *args, **kwargs):
     def is_sql_auto_is_null_enabled(self):
         with self.connection.cursor() as cursor:
             cursor.execute('SELECT @@SQL_AUTO_IS_NULL')
-            return cursor.fetchone()[0] == 1
+            result = cursor.fetchone()
+            return result and result[0] == 1
diff --git a/docs/releases/1.10.1.txt b/docs/releases/1.10.1.txt
@@ -9,4 +9,5 @@ Django 1.10.1 fixes several bugs in 1.10.
 Bugfixes
 ========
 
-* ...
+* Fixed a crash in MySQL connections where ``SELECT @@SQL_AUTO_IS_NULL``
+  doesn't return a result (:ticket:`26991`).
