diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index b63646ce6476db2019b4fc5dee6afb792f0700bb..4d65ed3b70591a281ba465ac1b42999af147ec11 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -117,6 +117,7 @@ typedef struct SParsedDataColInfo {
   uint16_t       flen;        // TODO: get from STSchema
   uint16_t       allNullLen;  // TODO: get from STSchema
   uint16_t       extendedVarLen;
+  uint16_t       boundColsLen;    // len of bound columns
   int32_t *      boundedColumns;  // bound column idx according to schema
   SBoundColumn * cols;
   SBoundIdxInfo *colIdxInfo;
@@ -143,8 +144,7 @@ typedef enum {
 
 int tsParseTime(SStrToken *pToken, int64_t *time, char **next, char *error, int16_t timePrec);
 
-int  initMemRowBuilder(SMemRowBuilder *pBuilder, uint32_t nRows, uint32_t nCols, uint32_t nBoundCols,
-                       int32_t allNullLen);
+int  initMemRowBuilder(SMemRowBuilder *pBuilder, uint32_t nRows, SParsedDataColInfo *pColInfo);
 void destroyMemRowBuilder(SMemRowBuilder *pBuilder);
 
 /**
@@ -529,12 +529,12 @@ static FORCE_INLINE int32_t getExtendedRowSize(STableDataBlocks *pBlock) {
   return pBlock->rowSize + TD_MEM_ROW_DATA_HEAD_SIZE + pBlock->boundColumnInfo.extendedVarLen;
 }
 
-static FORCE_INLINE bool checkAndConvertMemRow(SMemRow row, int32_t dataLen, int32_t kvLen) {
+static FORCE_INLINE bool checkConvertMemRow(SMemRow row, int32_t dataLen, int32_t kvLen) {
   if (isDataRow(row)) {
-    if (kvLen < (dataLen * KVRatioConvert)) {
+    if (isConvertToKvRow(kvLen, dataLen)) {
       return true;
     }
-  } else if (kvLen > dataLen) {
+  } else if (isConvertToDataRow(kvLen, dataLen)) {
     return true;
   }
   return false;
diff --git a/src/client/src/tscParseInsert.c b/src/client/src/tscParseInsert.c
index 2f401fee2341bede1031d4a664dcf312de2f5b8f..280c1c16eb96a06da5a82f25a77a8e35be670abd 100644
--- a/src/client/src/tscParseInsert.c
+++ b/src/client/src/tscParseInsert.c
@@ -41,9 +41,8 @@ enum {
 static int32_t tscAllocateMemIfNeed(STableDataBlocks *pDataBlock, int32_t rowSize, int32_t *numOfRows);
 static int32_t parseBoundColumns(SInsertStatementParam *pInsertParam, SParsedDataColInfo *pColInfo, SSchema *pSchema,
                                  char *str, char **end);
-int            initMemRowBuilder(SMemRowBuilder *pBuilder, uint32_t nRows, uint32_t nCols, uint32_t nBoundCols,
-                                 int32_t allNullLen) {
-  ASSERT(nRows >= 0 && nCols > 0 && (nBoundCols <= nCols));
+int            initMemRowBuilder(SMemRowBuilder *pBuilder, uint32_t nRows, SParsedDataColInfo *pColInfo) {
+  ASSERT(nRows >= 0 && pColInfo->numOfCols > 0 && (pColInfo->numOfBound <= pColInfo->numOfCols));
   if (nRows > 0) {
     // already init(bind multiple rows by single column)
     if (pBuilder->compareStat == ROW_COMPARE_NEED && (pBuilder->rowInfo != NULL)) {
@@ -52,11 +51,21 @@ int            initMemRowBuilder(SMemRowBuilder *pBuilder, uint32_t nRows, uint3
   }
 
   // default compareStat is  ROW_COMPARE_NO_NEED
-  if (nBoundCols == 0) {  // file input
+  if (pColInfo->numOfBound == 0) {  // file input
     pBuilder->memRowType = SMEM_ROW_DATA;
     return TSDB_CODE_SUCCESS;
+  } else if (pColInfo->extendedVarLen == 0) {
+    // all columns are NoVarType, we can calculate the memRowType precisely
+    uint32_t dataLen = pColInfo->allNullLen + TD_MEM_ROW_DATA_HEAD_SIZE;
+    uint32_t kvLen = TD_MEM_ROW_KV_HEAD_SIZE + pColInfo->numOfBound * sizeof(SColIdx) + pColInfo->boundColsLen;
+    if (isConvertToKvRow(kvLen, dataLen)) {
+      pBuilder->memRowType = SMEM_ROW_KV;
+    } else {
+      pBuilder->memRowType = SMEM_ROW_DATA;
+    }
+    return TSDB_CODE_SUCCESS;
   } else {
-    float boundRatio = ((float)nBoundCols / (float)nCols);
+    float boundRatio = ((float)pColInfo->numOfBound / (float)pColInfo->numOfCols);
 
     if (boundRatio < KVRatioKV) {
       pBuilder->memRowType = SMEM_ROW_KV;
@@ -74,7 +83,7 @@ int            initMemRowBuilder(SMemRowBuilder *pBuilder, uint32_t nRows, uint3
     }
   }
 
-  pBuilder->kvRowInitLen = TD_MEM_ROW_KV_HEAD_SIZE + nBoundCols * sizeof(SColIdx);
+  pBuilder->kvRowInitLen = TD_MEM_ROW_KV_HEAD_SIZE + pColInfo->numOfBound * sizeof(SColIdx);
 
   if (nRows > 0) {
     pBuilder->rowInfo = tcalloc(nRows, sizeof(SMemRowInfo));
@@ -83,7 +92,7 @@ int            initMemRowBuilder(SMemRowBuilder *pBuilder, uint32_t nRows, uint3
     }
 
     for (int i = 0; i < nRows; ++i) {
-      (pBuilder->rowInfo + i)->dataLen = TD_MEM_ROW_DATA_HEAD_SIZE + allNullLen;
+      (pBuilder->rowInfo + i)->dataLen = TD_MEM_ROW_DATA_HEAD_SIZE + pColInfo->allNullLen;
       (pBuilder->rowInfo + i)->kvLen = pBuilder->kvRowInitLen;
     }
   }
@@ -553,7 +562,7 @@ int tsParseOneRow(char **str, STableDataBlocks *pDataBlocks, int16_t timePrec, i
     // 2. check and set convert flag
     bool isNeedConvertRow = false;
     if (pBuilder->compareStat == ROW_COMPARE_NEED) {
-      isNeedConvertRow = checkAndConvertMemRow(row, dataLen, kvLen);
+      isNeedConvertRow = checkConvertMemRow(row, dataLen, kvLen);
     }
 
     // 3. set the null value for the columns that do not assign values
@@ -630,9 +639,7 @@ int32_t tsParseValues(char **str, STableDataBlocks *pDataBlock, int maxRows, SIn
 
   int32_t extendedRowSize = getExtendedRowSize(pDataBlock);
 
-  if (TSDB_CODE_SUCCESS !=
-      (code = initMemRowBuilder(&pDataBlock->rowBuilder, 0, tinfo.numOfColumns, pDataBlock->boundColumnInfo.numOfBound,
-                                pDataBlock->boundColumnInfo.allNullLen))) {
+  if (TSDB_CODE_SUCCESS != (code = initMemRowBuilder(&pDataBlock->rowBuilder, 0, &pDataBlock->boundColumnInfo))) {
     return code;
   }
   int32_t convertOffset = 0;
@@ -1270,6 +1277,7 @@ static int32_t parseBoundColumns(SInsertStatementParam *pInsertParam, SParsedDat
         pColInfo->cols[t].valStat = VAL_STAT_HAS;
         pColInfo->boundedColumns[pColInfo->numOfBound] = t;
         ++pColInfo->numOfBound;
+        pColInfo->boundColsLen += pSchema[t].bytes;
         findColumnIndex = true;
         if (isOrdered && (lastColIdx > t)) {
           isOrdered = false;
@@ -1293,6 +1301,7 @@ static int32_t parseBoundColumns(SInsertStatementParam *pInsertParam, SParsedDat
           pColInfo->cols[t].valStat = VAL_STAT_HAS;
           pColInfo->boundedColumns[pColInfo->numOfBound] = t;
           ++pColInfo->numOfBound;
+          pColInfo->boundColsLen += pSchema[t].bytes;
           findColumnIndex = true;
           if (isOrdered && (lastColIdx > t)) {
             isOrdered = false;
diff --git a/src/common/inc/tdataformat.h b/src/common/inc/tdataformat.h
index d93c0ce89582295557d90128e6484f6a5fe9ac2e..aaed74d677560d7b33b5a9dc0ae66f003fc0ec6f 100644
--- a/src/common/inc/tdataformat.h
+++ b/src/common/inc/tdataformat.h
@@ -625,6 +625,8 @@ typedef void *SMemRow;
 #define isKvRowT(t) (SMEM_ROW_KV == (((uint8_t)(t)) & 0x01))
 #define isKvRow(r) (SMEM_ROW_KV == memRowType(r))
 #define isNeedConvertRow(r) (((*(uint8_t *)(r)) & 0x80) == SMEM_ROW_CONVERT)
+#define isConvertToKvRow(k, d) ((k) < ((d)*KVRatioConvert))
+#define isConvertToDataRow(k, d) ((k) > (d))
 
 #define memRowDataBody(r) POINTER_SHIFT(r, TD_MEM_ROW_TYPE_SIZE)  // section after flag
 #define memRowKvBody(r) \