diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index 728021543b026d767b520bbb89efdbc7db5135b6..e4b2c7b0a101ac34a93f1dbde1e6218354a9542e 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -115,9 +115,9 @@ typedef struct SParsedDataColInfo {
   int16_t        numOfCols;
   int16_t        numOfBound;
   uint16_t       flen;        // TODO: get from STSchema
-  uint16_t       allNullLen;  // TODO: get from STSchema
+  uint16_t       allNullLen;  // TODO: get from STSchema(base on SDataRow)
   uint16_t       extendedVarLen;
-  uint16_t       boundNullLen;    // bound column len with all NULL value
+  uint16_t       boundNullLen;    // bound column len with all NULL value(without VarDataOffsetT/SColIdx part)
   int32_t *      boundedColumns;  // bound column idx according to schema
   SBoundColumn * cols;
   SBoundIdxInfo *colIdxInfo;
diff --git a/src/client/src/tscParseInsert.c b/src/client/src/tscParseInsert.c
index 59ad58d03c3e895699ab15b3879fc3c6de6ceb85..e7346b130efe7bff0f1fbdeef1597166cf2c4cfe 100644
--- a/src/client/src/tscParseInsert.c
+++ b/src/client/src/tscParseInsert.c
@@ -50,9 +50,9 @@ int initMemRowBuilder(SMemRowBuilder *pBuilder, uint32_t nRows, SParsedDataColIn
     }
   }
 
-  uint32_t dataLen = pColInfo->allNullLen + TD_MEM_ROW_DATA_HEAD_SIZE;
+  uint32_t dataLen = TD_MEM_ROW_DATA_HEAD_SIZE + pColInfo->allNullLen;
   uint32_t kvLen = TD_MEM_ROW_KV_HEAD_SIZE + pColInfo->numOfBound * sizeof(SColIdx) + pColInfo->boundNullLen;
-  if (isConvertToKvRow(kvLen, dataLen)) {
+  if (isConvertToKVRow(kvLen, dataLen)) {
     pBuilder->memRowType = SMEM_ROW_KV;
   } else {
     pBuilder->memRowType = SMEM_ROW_DATA;
@@ -1240,8 +1240,6 @@ static int32_t parseBoundColumns(SInsertStatementParam *pInsertParam, SParsedDat
         pColInfo->cols[t].valStat = VAL_STAT_HAS;
         pColInfo->boundedColumns[pColInfo->numOfBound] = t;
         ++pColInfo->numOfBound;
-        // N.B. make sure sizeof(VarDataOffsetT) == sizeof(SColIdx)
-        pColInfo->boundNullLen += TYPE_BYTES[pSchema[t].type];
         switch (pSchema[t].type) {
           case TSDB_DATA_TYPE_BINARY:
             pColInfo->boundNullLen += (VARSTR_HEADER_SIZE + CHAR_BYTES);
@@ -1250,6 +1248,7 @@ static int32_t parseBoundColumns(SInsertStatementParam *pInsertParam, SParsedDat
             pColInfo->boundNullLen += (VARSTR_HEADER_SIZE + TSDB_NCHAR_SIZE);
             break;
           default:
+            pColInfo->boundNullLen += TYPE_BYTES[pSchema[t].type];
             break;
         }
         findColumnIndex = true;
@@ -1275,8 +1274,6 @@ static int32_t parseBoundColumns(SInsertStatementParam *pInsertParam, SParsedDat
           pColInfo->cols[t].valStat = VAL_STAT_HAS;
           pColInfo->boundedColumns[pColInfo->numOfBound] = t;
           ++pColInfo->numOfBound;
-          // N.B. make sure sizeof(VarDataOffsetT) == sizeof(SColIdx)
-          pColInfo->boundNullLen += TYPE_BYTES[pSchema[t].type];
           switch (pSchema[t].type) {
             case TSDB_DATA_TYPE_BINARY:
               pColInfo->boundNullLen += (VARSTR_HEADER_SIZE + CHAR_BYTES);
@@ -1285,6 +1282,7 @@ static int32_t parseBoundColumns(SInsertStatementParam *pInsertParam, SParsedDat
               pColInfo->boundNullLen += (VARSTR_HEADER_SIZE + TSDB_NCHAR_SIZE);
               break;
             default:
+              pColInfo->boundNullLen += TYPE_BYTES[pSchema[t].type];
               break;
           }
           findColumnIndex = true;
diff --git a/src/common/inc/tdataformat.h b/src/common/inc/tdataformat.h
index 7c2438c7378ccd00edd6e22841cc59465010b11f..664b6f2527a47e4bde0ee359f1d83f7300eb68fc 100644
--- a/src/common/inc/tdataformat.h
+++ b/src/common/inc/tdataformat.h
@@ -619,8 +619,7 @@ typedef void *SMemRow;
 #define isDataRow(r) (SMEM_ROW_DATA == memRowType(r))
 #define isKvRowT(t) (SMEM_ROW_KV == (((uint8_t)(t)) & 0x01))
 #define isKvRow(r) (SMEM_ROW_KV == memRowType(r))
-#define isConvertToKvRow(k, d) ((k) < ((d)*KVRatioConvert))
-#define isConvertToDataRow(k, d) ((k) > (d))
+#define isConvertToKVRow(k, d) ((k) < ((d)*KVRatioConvert))
 
 #define memRowDataBody(r) POINTER_SHIFT(r, TD_MEM_ROW_TYPE_SIZE)  // section after flag
 #define memRowKvBody(r) \