diff --git a/include/common/tdataformat.h b/include/common/tdataformat.h
index bf2ddc0920..af035d0d1f 100644
--- a/include/common/tdataformat.h
+++ b/include/common/tdataformat.h
@@ -45,10 +45,12 @@ void    tTSchemaDestroy(STSchema *pTSchema);
 // STSRow2
 int32_t tPutTSRow(uint8_t *p, STSRow2 *pRow);
 int32_t tGetTSRow(uint8_t *p, STSRow2 *pRow);
+int32_t tTSRowDup(const STSRow2 *pRow, STSRow2 **ppRow);
+void    tTSRowFree(STSRow2 *pRow);
 int32_t tTSRowGet(const STSRow2 *pRow, STSchema *pTSchema, int32_t iCol, SColVal *pColVal);
 
 // STSRowBuilder
-int32_t tTSRowBuilderInit(STSRowBuilder *pBuilder, int32_t sver, SSchema *pSchema, int32_t nCols);
+int32_t tTSRowBuilderInit(STSRowBuilder *pBuilder, int32_t sver, int32_t nCols, SSchema *pSchema);
 void    tTSRowBuilderClear(STSRowBuilder *pBuilder);
 void    tTSRowBuilderReset(STSRowBuilder *pBuilder);
 int32_t tTSRowBuilderPut(STSRowBuilder *pBuilder, int32_t cid, uint8_t *pData, uint32_t nData);
diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index fbc2c2306d..3f179ac58a 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -32,6 +32,8 @@ typedef struct {
 #pragma pack(pop)
 
 #define TSROW_IS_KV_ROW(r) ((r)->flags & TSROW_KV_ROW)
+#define BIT1_SIZE(n)       (((n)-1) / 8 + 1)
+#define BIT2_SIZE(n)       (((n)-1) / 4 + 1)
 #define SET_BIT1(p, i, v)  ((p)[(i) / 8] = (p)[(i) / 8] & (~(((uint8_t)1) << ((i) % 8))) | ((v) << ((i) % 8)))
 #define SET_BIT2(p, i, v)  ((p)[(i) / 4] = (p)[(i) / 4] & (~(((uint8_t)3) << ((i) % 4))) | ((v) << ((i) % 4)))
 #define GET_BIT1(p, i)     (((p)[(i) / 8] >> ((i) % 8)) & ((uint8_t)1))
@@ -80,6 +82,31 @@ int32_t tGetTSRow(uint8_t *p, STSRow2 *pRow) {
   return n;
 }
 
+int32_t tTSRowDup(const STSRow2 *pRow, STSRow2 **ppRow) {
+  (*ppRow) = taosMemoryMalloc(sizeof(*pRow) + pRow->nData);
+  if (*ppRow == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  (*ppRow)->ts = pRow->ts;
+  (*ppRow)->flags = pRow->flags;
+  (*ppRow)->sver = pRow->sver;
+  (*ppRow)->nData = pRow->nData;
+  if (pRow->nData) {
+    (*ppRow)->pData = (uint8_t *)(&(*ppRow)[1]);
+    memcpy((*ppRow)->pData, pRow->pData, pRow->nData);
+  } else {
+    (*ppRow)->pData = NULL;
+  }
+
+  return 0;
+}
+
+void tTSRowFree(STSRow2 *pRow) {
+  if (pRow) taosMemoryFree(pRow);
+}
+
 static FORCE_INLINE int kvRowCmprFn(const void *p1, const void *p2) {
   col_id_t cid = *(col_id_t *)p1;
   SKVIdx  *pKVIdx = (SKVIdx *)p2;
@@ -229,11 +256,11 @@ void tTSchemaDestroy(STSchema *pTSchema) {
 }
 
 // STSRowBuilder
-int32_t tTSRowBuilderInit(STSRowBuilder *pBuilder, int32_t sver, SSchema *pSchema, int32_t nCols) {
+int32_t tTSRowBuilderInit(STSRowBuilder *pBuilder, int32_t sver, int32_t nCols, SSchema *pSchema) {
   if (tTSchemaCreate(sver, pSchema, nCols, &pBuilder->pTSchema) < 0) return -1;
 
-  pBuilder->szBitMap1 = (nCols - 2) / 8 + 1;
-  pBuilder->szBitMap2 = (nCols - 2) / 4 + 1;
+  pBuilder->szBitMap1 = BIT1_SIZE(nCols - 1);
+  pBuilder->szBitMap2 = BIT2_SIZE(nCols - 1);
   pBuilder->szKVBuf =
       sizeof(STSKVRow) + sizeof(SKVIdx) * (nCols - 1) + pBuilder->pTSchema->flen + pBuilder->pTSchema->vlen;
   pBuilder->szTPBuf = pBuilder->szBitMap2 + pBuilder->pTSchema->flen + pBuilder->pTSchema->vlen;
@@ -286,16 +313,16 @@ int32_t tTSRowBuilderPut(STSRowBuilder *pBuilder, int32_t cid, uint8_t *pData, u
   int32_t   iCol;
   STSKVRow *pTSKVRow = (STSKVRow *)pBuilder->pKVBuf;
 
-  // use interp search (todo)
-  if (pTColumn->colId > cid) {
+  // use interp search
+  if (pTColumn->colId < cid) {  // right search
     for (iCol = pBuilder->iCol + 1; iCol < pBuilder->pTSchema->numOfCols; iCol++) {
       pTColumn = &pBuilder->pTSchema->columns[iCol];
-      if (pTColumn->colId == cid) break;
+      if (pTColumn->colId >= cid) break;
     }
-  } else if (pTColumn->colId < cid) {
+  } else if (pTColumn->colId > cid) {  // left search
     for (iCol = pBuilder->iCol - 1; iCol >= 0; iCol--) {
       pTColumn = &pBuilder->pTSchema->columns[iCol];
-      if (pTColumn->colId == cid) break;
+      if (pTColumn->colId <= cid) break;
     }
   }
 
@@ -391,7 +418,7 @@ static void setBitMap(uint8_t *p, STSchema *pTSchema, uint8_t flags) {
       case TSROW_HAS_VAL | TSROW_HAS_NULL | TSROW_HAS_NONE:
         if (pTColumn->flags & COL_SET_NULL) {
           SET_BIT2(p, bidx, (uint8_t)1);
-        } else if (pTColumn->flags & COL_SET_NULL) {
+        } else if (pTColumn->flags & COL_SET_VAL) {
           SET_BIT2(p, bidx, (uint8_t)2);
         } else {
           SET_BIT2(p, bidx, (uint8_t)0);
@@ -412,14 +439,15 @@ int32_t tTSRowBuilderGetRow(STSRowBuilder *pBuilder, const STSRow2 **ppRow) {
   int32_t   nDataTP, nDataKV;
   uint32_t  flags;
   STSKVRow *pTSKVRow = (STSKVRow *)pBuilder->pKVBuf;
+  int32_t   nCols = pBuilder->pTSchema->numOfCols;
 
   // error not set ts
   if (!COL_IS_SET(pBuilder->pTSchema->columns->flags)) {
     return -1;
   }
 
-  ASSERT(pTSKVRow->nCols < pBuilder->pTSchema->numOfCols);
-  if (pTSKVRow->nCols < pBuilder->pTSchema->numOfCols - 1) {
+  ASSERT(pTSKVRow->nCols < nCols);
+  if (pTSKVRow->nCols < nCols - 1) {
     pBuilder->row.flags |= TSROW_HAS_NONE;
   }
 
@@ -453,13 +481,15 @@ int32_t tTSRowBuilderGetRow(STSRowBuilder *pBuilder, const STSRow2 **ppRow) {
   if (nDataKV < nDataTP) {
     // generate KV row
 
+    ASSERT(pBuilder->row.flags & 0xf != TSROW_HAS_VAL);
+
     pBuilder->row.flags |= TSROW_KV_ROW;
     pBuilder->row.nData = nDataKV;
     pBuilder->row.pData = pBuilder->pKVBuf;
 
     qsort(pTSKVRow->idx, pTSKVRow->nCols, sizeof(SKVIdx), tSKVIdxCmprFn);
-    if (pTSKVRow->nCols < pBuilder->pTSchema->numOfCols - 1) {
-      memmove(&pTSKVRow->idx[pTSKVRow->nCols], &pTSKVRow->idx[pBuilder->pTSchema->numOfCols - 1], pBuilder->vlenKV);
+    if (pTSKVRow->nCols < nCols - 1) {
+      memmove(&pTSKVRow->idx[pTSKVRow->nCols], &pTSKVRow->idx[nCols - 1], pBuilder->vlenKV);
     }
   } else {
     // generate TUPLE row
@@ -472,14 +502,13 @@ int32_t tTSRowBuilderGetRow(STSRowBuilder *pBuilder, const STSRow2 **ppRow) {
     if (flags == TSROW_HAS_VAL) {
       pBuilder->row.pData = pBuilder->pTPBuf + pBuilder->szBitMap2;
     } else {
-      if (flags == TSROW_HAS_VAL) {
-        p = pBuilder->pTPBuf;
+      if (flags == TSROW_HAS_VAL | TSROW_HAS_NULL | TSROW_HAS_NONE) {
+        pBuilder->row.pData = pBuilder->pTPBuf;
       } else {
-        p = pBuilder->pTPBuf + pBuilder->szBitMap2 - pBuilder->szBitMap1;
+        pBuilder->row.pData = pBuilder->pTPBuf + pBuilder->szBitMap2 - pBuilder->szBitMap1;
       }
 
-      setBitMap(p, pBuilder->pTSchema, flags);
-      pBuilder->row.pData = p;
+      setBitMap(pBuilder->row.pData, pBuilder->pTSchema, flags);
     }
   }