From ef36ecd376b982af7c36a210bb388abd1d1c614e Mon Sep 17 00:00:00 2001
From: zhufanmao <zhufanmao@bytedance.com>
Date: Thu, 31 Aug 2017 20:26:32 +0800
Subject: [PATCH] avoid some proxy not support select command

---
 session/redis/sess_redis.go | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/session/redis/sess_redis.go b/session/redis/sess_redis.go
index d0424515..55595851 100644
--- a/session/redis/sess_redis.go
+++ b/session/redis/sess_redis.go
@@ -160,10 +160,13 @@ func (rp *Provider) SessionInit(maxlifetime int64, savePath string) error {
 				return nil, err
 			}
 		}
-		_, err = c.Do("SELECT", rp.dbNum)
-		if err != nil {
-			c.Close()
-			return nil, err
+		//some redis proxy such as twemproxy is not support select command
+		if rp.dbNum > 0 {
+			_, err = c.Do("SELECT", rp.dbNum)
+			if err != nil {
+				c.Close()
+				return nil, err
+			}
 		}
 		return c, err
 	}, rp.poolsize)