From 42d0f5a3dcb53267a75ad8d49fe9ddc634bd1f0f Mon Sep 17 00:00:00 2001
From: Shuduo Sang <sangshuduo@gmail.com>
Date: Thu, 15 Apr 2021 17:29:27 +0800
Subject: [PATCH] [TD-3783]<fix>: taosdemo for windows generates rand string
 invalid. (#5828)

---
 src/kit/taosdemo/taosdemo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index f531cc15f7..1bb9b8767a 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -1063,7 +1063,7 @@ static void rand_string(char *str, int size) {
     //--size;
     int n;
     for (n = 0; n < size - 1; n++) {
-      int key = rand_tinyint() % (int)(sizeof(charset) - 1);
+      int key = abs(rand_tinyint()) % (int)(sizeof(charset) - 1);
       str[n] = charset[key];
     }
     str[n] = 0;
-- 
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