From 7b1fce481ae0324cfe121c902f8059f33dc89133 Mon Sep 17 00:00:00 2001
From: Liu Jicong <liujicong@qq.com>
Date: Wed, 4 Aug 2021 01:12:10 +0800
Subject: [PATCH] [TD-5694]<fix>: fix

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

diff --git a/src/common/src/tdataformat.c b/src/common/src/tdataformat.c
index 9bcada27cb..c4f3dda7b4 100644
--- a/src/common/src/tdataformat.c
+++ b/src/common/src/tdataformat.c
@@ -25,7 +25,7 @@ static void tdMergeTwoDataCols(SDataCols *target, SDataCols *src1, int *iter1, i
 int tdAllocMemForCol(SDataCol *pCol, int maxPoints) {
   int spaceNeeded = pCol->bytes * maxPoints;
   if(IS_VAR_DATA_TYPE(pCol->type)) {
-    spaceNeeded += sizeof(VarDataOffsetT) * maxPoints;
+    spaceNeeded += sizeof(VarDataOffsetT) * maxPoints + sizeof(VarDataLenT) * maxPoints;
   }
   if(pCol->spaceSize < spaceNeeded) {
     void* ptr = realloc(pCol->pData, spaceNeeded);
-- 
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