diff --git a/src/client/src/tscParseInsert.c b/src/client/src/tscParseInsert.c
index 91db5277bf0f26cbbe897bd13f07eb4d19278681..89647324b9e88e04034c136531abc117eb497f33 100644
--- a/src/client/src/tscParseInsert.c
+++ b/src/client/src/tscParseInsert.c
@@ -1077,7 +1077,7 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql, char** boundC
         return code;
       }
 
-      tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal);
+      tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal, false);
     }
 
     // encode json tag string
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 208fa10abc8ad38bb3c68064662d7149aa88071f..180e3d7443fdda08f333363c36c4f5d1eb4864f9 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -7618,7 +7618,7 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
               return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg4);
             }
 
-            tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal);
+            tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal, false);
 
             findColumnIndex = true;
             break;
@@ -7640,7 +7640,7 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
         SSchema*          pSchema = &pTagSchema[i];
         tVariantListItem* pItem = taosArrayGet(pValList, i);
 
-        char tagVal[TSDB_MAX_TAGS_LEN];
+        char tagVal[TSDB_MAX_TAGS_LEN] = {0};
         if (pSchema->type == TSDB_DATA_TYPE_BINARY || pSchema->type == TSDB_DATA_TYPE_NCHAR) {
           if (pItem->pVar.nLen > pSchema->bytes) {
             tdDestroyKVRowBuilder(&kvRowBuilder);
@@ -7678,7 +7678,7 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
           return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg4);
         }
 
-        tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal);
+        tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal, false);
       }
     }
 
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index be61434dacd6660f3685303895109f40a3d66983..615183f9f3863695134dd6f706034b12987bac47 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -5178,7 +5178,7 @@ int parseJsontoTagData(char* json, SKVRowBuilder* kvRowBuilder, char* errMsg, in
     }
 
     varDataSetLen(tagVal, output);
-    tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_NCHAR, tagVal);   // add json key
+    tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_NCHAR, tagVal, false);   // add json key
 
     memset(tagVal, 0, TSDB_MAX_TAGS_LEN);
     if(item->type == cJSON_String){     // add json value  format: type|data
@@ -5192,12 +5192,12 @@ int parseJsontoTagData(char* json, SKVRowBuilder* kvRowBuilder, char* errMsg, in
       }
 
       varDataSetLen(tagData, output);
-      tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_NCHAR, tagVal);
+      tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_NCHAR, tagVal, true);
     }else if(item->type == cJSON_Number){
       *tagVal = item->type;    // type
       char* tagData = tagVal + CHAR_BYTES;
       *((double *)tagData) = item->valuedouble;
-      tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_BIGINT, tagVal);
+      tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_BIGINT, tagVal, true);
     }else{
       retCode =  tscSQLSyntaxErrMsg(errMsg, "invalidate json value", NULL);
       goto end;
diff --git a/src/common/inc/tdataformat.h b/src/common/inc/tdataformat.h
index a01c3775397e25849d9e8ff70409db7ac0af90ba..54e9521469483ca5ec0ee382827292903699e9f1 100644
--- a/src/common/inc/tdataformat.h
+++ b/src/common/inc/tdataformat.h
@@ -544,7 +544,7 @@ void   tdDestroyKVRowBuilder(SKVRowBuilder *pBuilder);
 void   tdResetKVRowBuilder(SKVRowBuilder *pBuilder);
 SKVRow tdGetKVRowFromBuilder(SKVRowBuilder *pBuilder);
 
-static FORCE_INLINE int tdAddColToKVRow(SKVRowBuilder *pBuilder, int16_t colId, int8_t type, void *value) {
+static FORCE_INLINE int tdAddColToKVRow(SKVRowBuilder *pBuilder, int16_t colId, int8_t type, void *value, bool isJumpJsonVType) {
   if (pBuilder->nCols >= pBuilder->tCols) {
     pBuilder->tCols *= 2;
     SColIdx* pColIdx = (SColIdx *)realloc((void *)(pBuilder->pColIdx), sizeof(SColIdx) * pBuilder->tCols);
@@ -557,7 +557,9 @@ static FORCE_INLINE int tdAddColToKVRow(SKVRowBuilder *pBuilder, int16_t colId,
 
   pBuilder->nCols++;
 
-  int tlen = IS_VAR_DATA_TYPE(type) ? varDataTLen(value) : TYPE_BYTES[type];
+  void *jumpType = value;
+  if(isJumpJsonVType) jumpType = value + CHAR_BYTES;
+  int tlen = IS_VAR_DATA_TYPE(type) ? varDataTLen(jumpType) : TYPE_BYTES[type];
   if (tlen > pBuilder->alloc - pBuilder->size) {
     while (tlen > pBuilder->alloc - pBuilder->size) {
       pBuilder->alloc *= 2;