From eea1bad72ed13ddc6ec1d4d3fe8b468d3ca6ce9b Mon Sep 17 00:00:00 2001
From: Shengliang Guan <slguan@taosdata.com>
Date: Mon, 28 Feb 2022 16:53:22 +0800
Subject: [PATCH] minor changes

---
 source/os/src/osTimezone.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/source/os/src/osTimezone.c b/source/os/src/osTimezone.c
index 07846781ad..68da2ce25e 100644
--- a/source/os/src/osTimezone.c
+++ b/source/os/src/osTimezone.c
@@ -46,6 +46,8 @@
 #endif
 
 void taosSetSystemTimezone(const char *inTimezone, char *outTimezone, int8_t *outDaylight) {
+  if (inTimezone == NULL || inTimezone[0] == 0) return;
+
 #ifdef WINDOWS
   char winStr[TD_LOCALE_LEN * 2];
   sprintf(winStr, "TZ=%s", inTimezone);