From f5ee4af912340055c1b2b165a0b9f3b04bbb027f Mon Sep 17 00:00:00 2001
From: Shuduo Sang <sdsang@taosdata.com>
Date: Tue, 21 Sep 2021 22:21:24 +0800
Subject: [PATCH] fix nchar random length.

---
 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 692f6c0345..bcdf97b3d5 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -6388,7 +6388,7 @@ static int generateSampleFromRand(
 
                 case TSDB_DATA_TYPE_NCHAR:
                     dataLen = (columns)?columns[c].dataLen:g_args.binwidth;
-                    rand_string(data, dataLen);
+                    rand_string(data, dataLen - 1);
                     pos += sprintf(buff + pos, "%s,", data);
                     break;
 
-- 
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