From 125c0fa575efc73c0c35eaa77d2172aa131ca640 Mon Sep 17 00:00:00 2001
From: wangmm0220 <wangmm0220@gmail.com>
Date: Mon, 23 May 2022 18:12:05 +0800
Subject: [PATCH] fix:add json test case

---
 source/client/src/clientImpl.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 59608831c4..daa5887127 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -866,8 +866,7 @@ static char* parseTagDatatoJson(void* p) {
     if (j == 0) {
       if (*val == TSDB_DATA_TYPE_NULL) {
         string = taosMemoryCalloc(1, 8);
-        sprintf(varDataVal(string), "%s", TSDB_DATA_NULL_STR_L);
-        varDataSetLen(string, strlen(varDataVal(string)));
+        sprintf(string, "%s", TSDB_DATA_NULL_STR_L);
         goto end;
       }
       continue;
-- 
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