From 22a6c4f13c95505a1d853a2479f87b054260505e Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Fri, 23 Oct 2020 12:55:43 +0800
Subject: [PATCH] [td-1373]

---
 src/common/src/tvariant.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/common/src/tvariant.c b/src/common/src/tvariant.c
index bfd6ca0184..78d1e38f1e 100644
--- a/src/common/src/tvariant.c
+++ b/src/common/src/tvariant.c
@@ -147,15 +147,20 @@ void tVariantAssign(tVariant *pDst, const tVariant *pSrc) {
   *pDst = *pSrc;
   
   if (pSrc->nType == TSDB_DATA_TYPE_BINARY || pSrc->nType == TSDB_DATA_TYPE_NCHAR) {
-    int32_t len = pSrc->nLen + 1;
+    int32_t allocLen = pSrc->nLen + 1;
+    int32_t len = pSrc->nLen;
+
     if (pSrc->nType == TSDB_DATA_TYPE_NCHAR) {
+      allocLen = allocLen * TSDB_NCHAR_SIZE;
       len = len * TSDB_NCHAR_SIZE;
     }
 
-    char* p = realloc(pDst->pz, len);
+    char* p = realloc(pDst->pz, allocLen);
     assert(p);
 
-    memset(pDst->pz, 0, len);
+    memset(p, 0, allocLen);
+    pDst->pz = p;
+
     memcpy(pDst->pz, pSrc->pz, len);
     return;
   }
-- 
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