From 50f1aff778822ec94fe7e0521c6f80a8886a003f Mon Sep 17 00:00:00 2001
From: Borys Piddubnyi <zhu@zhu.org.ua>
Date: Fri, 21 Oct 2016 15:40:53 +0300
Subject: [PATCH] Fix "invalid expire time in set" for SetXX with expiration =
 0

---
 commands.go | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/commands.go b/commands.go
index 8a2b9c5d..b1510b06 100644
--- a/commands.go
+++ b/commands.go
@@ -788,10 +788,14 @@ func (c *cmdable) SetNX(key string, value interface{}, expiration time.Duration)
 // Zero expiration means the key has no expiration time.
 func (c *cmdable) SetXX(key string, value interface{}, expiration time.Duration) *BoolCmd {
 	var cmd *BoolCmd
-	if usePrecise(expiration) {
-		cmd = NewBoolCmd("set", key, value, "px", formatMs(expiration), "xx")
+	if expiration == 0 {
+		cmd = NewBoolCmd("set", key, value, "xx")
 	} else {
-		cmd = NewBoolCmd("set", key, value, "ex", formatSec(expiration), "xx")
+		if usePrecise(expiration) {
+			cmd = NewBoolCmd("set", key, value, "px", formatMs(expiration), "xx")
+		} else {
+			cmd = NewBoolCmd("set", key, value, "ex", formatSec(expiration), "xx")
+		}
 	}
 	c.process(cmd)
 	return cmd