diff --git a/sql/engines/redis.py b/sql/engines/redis.py
index eda4779755..78072208bb 100644
--- a/sql/engines/redis.py
+++ b/sql/engines/redis.py
@@ -1,5 +1,5 @@
 # -*- coding: UTF-8 -*-
-""" 
+"""
 @author: hhyo、yyukai
 @license: Apache Licence
 @file: redis.py
@@ -72,7 +72,7 @@ def get_all_databases(self, **kwargs):
                 for i in conn.info("Keyspace").keys()
                 if len(i.split("db")) == 2
             ]
-            rows = max(dbs, [16])
+            rows = max(dbs + [16])
 
         db_list = [str(x) for x in range(int(rows))]
         result.rows = db_list