refactor:do some internal refactor.

source/dnode/mnode/impl/src/mndDb.c

@@ -1651,7 +1651,7 @@ static void mndDumpDbInfoData(SMnode *pMnode, SSDataBlock *pBlock, SDbObj *pDb,
       } else if (i == 15) {
         colDataSetVal(pColInfo, rows, statusVstr, false);
       } else {
-        colDataAppendNULL(pColInfo, rows);
+        colDataSetNULL(pColInfo, rows);
       }
     }
   } else {
@@ -1721,7 +1721,7 @@ static void mndDumpDbInfoData(SMnode *pMnode, SSDataBlock *pBlock, SDbObj *pDb,
     char *rentensionVstr = buildRetension(pDb->cfg.pRetensions);
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     if (rentensionVstr == NULL) {
-      colDataAppendNULL(pColInfo, rows);
+      colDataSetNULL(pColInfo, rows);
     } else {
       colDataSetVal(pColInfo, rows, (const char *)rentensionVstr, false);
       taosMemoryFree(rentensionVstr);

source/dnode/mnode/impl/src/mndStb.c

@@ -2557,7 +2557,7 @@ static int32_t mndRetrieveStb(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pBloc
       STR_TO_VARSTR(comment, "");
       colDataSetVal(pColInfo, numOfRows, comment, false);
     } else {
-      colDataAppendNULL(pColInfo, numOfRows);
+      colDataSetNULL(pColInfo, numOfRows);
     }
 
     char watermark[64 + VARSTR_HEADER_SIZE] = {0};

source/dnode/mnode/impl/src/mndVgroup.c

@@ -733,9 +733,9 @@ static int32_t mndRetrieveVgroups(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *p
         pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
         colDataSetVal(pColInfo, numOfRows, (const char *)buf1, false);
       } else {
-        colDataAppendNULL(pColInfo, numOfRows);
+        colDataSetNULL(pColInfo, numOfRows);
         pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
-        colDataAppendNULL(pColInfo, numOfRows);
+        colDataSetNULL(pColInfo, numOfRows);
       }
     }
 

source/dnode/vnode/src/tq/tq.c

@@ -1272,9 +1272,9 @@ int32_t tqProcessDelReq(STQ* pTq, void* pReq, int32_t len, int64_t ver) {
     int64_t*         pUid = taosArrayGet(pRes->uidList, i);
     colDataSetVal(pUidCol, i, (const char*)pUid, false);
 
-    colDataAppendNULL(taosArrayGet(pDelBlock->pDataBlock, GROUPID_COLUMN_INDEX), i);
-    colDataAppendNULL(taosArrayGet(pDelBlock->pDataBlock, CALCULATE_START_TS_COLUMN_INDEX), i);
-    colDataAppendNULL(taosArrayGet(pDelBlock->pDataBlock, CALCULATE_END_TS_COLUMN_INDEX), i);
+    colDataSetNULL(taosArrayGet(pDelBlock->pDataBlock, GROUPID_COLUMN_INDEX), i);
+    colDataSetNULL(taosArrayGet(pDelBlock->pDataBlock, CALCULATE_START_TS_COLUMN_INDEX), i);
+    colDataSetNULL(taosArrayGet(pDelBlock->pDataBlock, CALCULATE_END_TS_COLUMN_INDEX), i);
   }
 
   taosArrayDestroy(pRes->uidList);

source/dnode/vnode/src/tsdb/tsdbRead.c

@@ -3642,7 +3642,7 @@ int32_t doAppendRowFromTSRow(SSDataBlock* pBlock, STsdbReader* pReader, STSRow*
     } else if (colId < pSchema->columns[j].colId) {
       SColumnInfoData* pColInfoData = taosArrayGet(pBlock->pDataBlock, pSupInfo->slotId[i]);
 
-      colDataAppendNULL(pColInfoData, outputRowIndex);
+      colDataSetNULL(pColInfoData, outputRowIndex);
       i += 1;
     } else if (colId > pSchema->columns[j].colId) {
       j += 1;
@@ -3652,7 +3652,7 @@ int32_t doAppendRowFromTSRow(SSDataBlock* pBlock, STsdbReader* pReader, STSRow*
   // set null value since current column does not exist in the "pSchema"
   while (i < pSupInfo->numOfCols) {
     SColumnInfoData* pColInfoData = taosArrayGet(pBlock->pDataBlock, pSupInfo->slotId[i]);
-    colDataAppendNULL(pColInfoData, outputRowIndex);
+    colDataSetNULL(pColInfoData, outputRowIndex);
     i += 1;
   }
 
@@ -3692,7 +3692,7 @@ int32_t doAppendRowFromFileBlock(SSDataBlock* pResBlock, STsdbReader* pReader, S
       j += 1;
     } else if (pData->cid > pCol->info.colId) {
       // the specified column does not exist in file block, fill with null data
-      colDataAppendNULL(pCol, outputRowIndex);
+      colDataSetNULL(pCol, outputRowIndex);
     }
 
     i += 1;
@@ -3700,7 +3700,7 @@ int32_t doAppendRowFromFileBlock(SSDataBlock* pResBlock, STsdbReader* pReader, S
 
   while (i < numOfOutputCols) {
     SColumnInfoData* pCol = taosArrayGet(pResBlock->pDataBlock, pSupInfo->slotId[i]);
-    colDataAppendNULL(pCol, outputRowIndex);
+    colDataSetNULL(pCol, outputRowIndex);
     i += 1;
   }
 

source/libs/executor/src/cachescanoperator.c

@@ -182,7 +182,7 @@ SSDataBlock* doScanCache(SOperatorInfo* pOperator) {
         SColumnInfoData* pDst = taosArrayGet(pRes->pDataBlock, slotId);
 
         if (colDataIsNull_s(pSrc, pInfo->indexOfBufferedRes)) {
-          colDataAppendNULL(pDst, 0);
+          colDataSetNULL(pDst, 0);
         } else {
           char* p = colDataGetData(pSrc, pInfo->indexOfBufferedRes);
           colDataSetVal(pDst, 0, p, false);

source/libs/executor/src/joinoperator.c

@@ -196,7 +196,7 @@ static void mergeJoinJoinLeftRight(struct SOperatorInfo* pOperator, SSDataBlock*
     }
 
     if (colDataIsNull_s(pSrc, rowIndex)) {
-      colDataAppendNULL(pDst, currRow);
+      colDataSetNULL(pDst, currRow);
     } else {
       char* p = colDataGetData(pSrc, rowIndex);
       colDataSetVal(pDst, currRow, p, false);

source/libs/executor/src/scanoperator.c

@@ -1235,10 +1235,10 @@ static int32_t generateSessionScanRange(SStreamScanInfo* pInfo, SSDataBlock* pSr
     colDataSetVal(pDestStartCol, i, (const char*)&startWin.win.skey, false);
     colDataSetVal(pDestEndCol, i, (const char*)&endWin.win.ekey, false);
 
-    colDataAppendNULL(pDestUidCol, i);
+    colDataSetNULL(pDestUidCol, i);
     colDataSetVal(pDestGpCol, i, (const char*)&groupId, false);
-    colDataAppendNULL(pDestCalStartTsCol, i);
-    colDataAppendNULL(pDestCalEndTsCol, i);
+    colDataSetNULL(pDestCalStartTsCol, i);
+    colDataSetNULL(pDestCalEndTsCol, i);
     pDestBlock->info.rows++;
   }
   return TSDB_CODE_SUCCESS;
@@ -1695,9 +1695,9 @@ static int32_t filterDelBlockByUid(SSDataBlock* pDst, const SSDataBlock* pSrc, S
       colDataSetVal(pDstEndCol, j, (const char*)&endCol[i], false);
       colDataSetVal(pDstUidCol, j, (const char*)&uidCol[i], false);
 
-      colDataAppendNULL(taosArrayGet(pDst->pDataBlock, GROUPID_COLUMN_INDEX), j);
-      colDataAppendNULL(taosArrayGet(pDst->pDataBlock, CALCULATE_START_TS_COLUMN_INDEX), j);
-      colDataAppendNULL(taosArrayGet(pDst->pDataBlock, CALCULATE_END_TS_COLUMN_INDEX), j);
+      colDataSetNULL(taosArrayGet(pDst->pDataBlock, GROUPID_COLUMN_INDEX), j);
+      colDataSetNULL(taosArrayGet(pDst->pDataBlock, CALCULATE_START_TS_COLUMN_INDEX), j);
+      colDataSetNULL(taosArrayGet(pDst->pDataBlock, CALCULATE_END_TS_COLUMN_INDEX), j);
       j++;
     }
   }
@@ -3109,7 +3109,7 @@ void fillTableCountScanDataBlock(STableCountScanSupp* pSupp, char* dbName, char*
       varDataSetLen(varStbName, strlen(stbName));
       colDataSetVal(colInfoData, 0, varStbName, false);
     } else {
-      colDataAppendNULL(colInfoData, 0);
+      colDataSetNULL(colInfoData, 0);
     }
   }
 

source/libs/executor/src/sortoperator.c

@@ -101,7 +101,7 @@ void appendOneRowToDataBlock(SSDataBlock* pBlock, STupleHandle* pTupleHandle) {
     SColumnInfoData* pColInfo = taosArrayGet(pBlock->pDataBlock, i);
     bool             isNull = tsortIsNullVal(pTupleHandle, i);
     if (isNull) {
-      colDataAppendNULL(pColInfo, pBlock->info.rows);
+      colDataSetNULL(pColInfo, pBlock->info.rows);
     } else {
       char* pData = tsortGetValue(pTupleHandle, i);
       if (pData != NULL) {

source/libs/executor/src/sysscanoperator.c

@@ -781,7 +781,7 @@ int32_t buildDbTableInfoBlock(bool sysInfo, const SSDataBlock* p, const SSysTabl
 
     // create time
     pColInfoData = taosArrayGet(p->pDataBlock, 2);
-    colDataAppendNULL(pColInfoData, numOfRows);
+    colDataSetNULL(pColInfoData, numOfRows);
 
     // number of columns
     pColInfoData = taosArrayGet(p->pDataBlock, 3);
@@ -789,7 +789,7 @@ int32_t buildDbTableInfoBlock(bool sysInfo, const SSDataBlock* p, const SSysTabl
 
     for (int32_t j = 4; j <= 8; ++j) {
       pColInfoData = taosArrayGet(p->pDataBlock, j);
-      colDataAppendNULL(pColInfoData, numOfRows);
+      colDataSetNULL(pColInfoData, numOfRows);
     }
 
     STR_TO_VARSTR(n, "SYSTEM_TABLE");
@@ -912,7 +912,7 @@ static SSDataBlock* sysTableBuildUserTablesByUids(SOperatorInfo* pOperator) {
         STR_TO_VARSTR(comment, "");
         colDataSetVal(pColInfoData, numOfRows, comment, false);
       } else {
-        colDataAppendNULL(pColInfoData, numOfRows);
+        colDataSetNULL(pColInfoData, numOfRows);
       }
 
       // uid
@@ -936,7 +936,7 @@ static SSDataBlock* sysTableBuildUserTablesByUids(SOperatorInfo* pOperator) {
 
       // super table name
       pColInfoData = taosArrayGet(p->pDataBlock, 4);
-      colDataAppendNULL(pColInfoData, numOfRows);
+      colDataSetNULL(pColInfoData, numOfRows);
 
       // table comment
       pColInfoData = taosArrayGet(p->pDataBlock, 8);
@@ -949,7 +949,7 @@ static SSDataBlock* sysTableBuildUserTablesByUids(SOperatorInfo* pOperator) {
         STR_TO_VARSTR(comment, "");
         colDataSetVal(pColInfoData, numOfRows, comment, false);
       } else {
-        colDataAppendNULL(pColInfoData, numOfRows);
+        colDataSetNULL(pColInfoData, numOfRows);
       }
 
       // uid
@@ -1093,7 +1093,7 @@ static SSDataBlock* sysTableBuildUserTables(SOperatorInfo* pOperator) {
         STR_TO_VARSTR(comment, "");
         colDataSetVal(pColInfoData, numOfRows, comment, false);
       } else {
-        colDataAppendNULL(pColInfoData, numOfRows);
+        colDataSetNULL(pColInfoData, numOfRows);
       }
 
       // uid
@@ -1116,7 +1116,7 @@ static SSDataBlock* sysTableBuildUserTables(SOperatorInfo* pOperator) {
 
       // super table name
       pColInfoData = taosArrayGet(p->pDataBlock, 4);
-      colDataAppendNULL(pColInfoData, numOfRows);
+      colDataSetNULL(pColInfoData, numOfRows);
 
       // table comment
       pColInfoData = taosArrayGet(p->pDataBlock, 8);
@@ -1129,7 +1129,7 @@ static SSDataBlock* sysTableBuildUserTables(SOperatorInfo* pOperator) {
         STR_TO_VARSTR(comment, "");
         colDataSetVal(pColInfoData, numOfRows, comment, false);
       } else {
-        colDataAppendNULL(pColInfoData, numOfRows);
+        colDataSetNULL(pColInfoData, numOfRows);
       }
 
       // uid

source/libs/executor/src/tfill.c

@@ -60,7 +60,7 @@ static void setNullRow(SSDataBlock* pBlock, SFillInfo* pFillInfo, int32_t rowInd
         setNotFillColumn(pFillInfo, pDstColInfo, rowIndex, i);
       }
     } else {
-      colDataAppendNULL(pDstColInfo, rowIndex);
+      colDataSetNULL(pDstColInfo, rowIndex);
     }
   }
 }
@@ -81,7 +81,7 @@ static void doSetUserSpecifiedValue(SColumnInfoData* pDst, SVariant* pVar, int32
   } else if (pDst->info.type == TSDB_DATA_TYPE_TIMESTAMP) {
     colDataSetVal(pDst, rowIndex, (const char*)&currentKey, false);
   } else {  // varchar/nchar data
-    colDataAppendNULL(pDst, rowIndex);
+    colDataSetNULL(pDst, rowIndex);
   }
 }
 
@@ -163,7 +163,7 @@ static void doFillOneRow(SFillInfo* pFillInfo, SSDataBlock* pBlock, SSDataBlock*
         } else {
           SGroupKeys* pKey = taosArrayGet(pFillInfo->prev.pRowVal, i);
           if (IS_VAR_DATA_TYPE(type) || type == TSDB_DATA_TYPE_BOOL || pKey->isNull) {
-            colDataAppendNULL(pDstCol, index);
+            colDataSetNULL(pDstCol, index);
             continue;
           }
 
@@ -217,7 +217,7 @@ static void doFillOneRow(SFillInfo* pFillInfo, SSDataBlock* pBlock, SSDataBlock*
 
 void doSetVal(SColumnInfoData* pDstCol, int32_t rowIndex, const SGroupKeys* pKey) {
   if (pKey->isNull) {
-    colDataAppendNULL(pDstCol, rowIndex);
+    colDataSetNULL(pDstCol, rowIndex);
   } else {
     colDataSetVal(pDstCol, rowIndex, pKey->pData, false);
   }
@@ -350,7 +350,7 @@ static int32_t fillResultImpl(SFillInfo* pFillInfo, SSDataBlock* pBlock, int32_t
               colDataSetVal(pDst, index, src, isNull);
               saveColData(pFillInfo->prev.pRowVal, i, src, isNull);  // todo:
             } else if (pFillInfo->type == TSDB_FILL_NULL || pFillInfo->type == TSDB_FILL_NULL_F) {
-              colDataAppendNULL(pDst, index);
+              colDataSetNULL(pDst, index);
             } else if (pFillInfo->type == TSDB_FILL_NEXT) {
               SArray*     p = FILL_IS_ASC_FILL(pFillInfo) ? pFillInfo->next.pRowVal : pFillInfo->prev.pRowVal;
               SGroupKeys* pKey = taosArrayGet(p, i);

source/libs/executor/src/timesliceoperator.c

@@ -183,7 +183,7 @@ static bool genInterpolationResult(STimeSliceOperatorInfo* pSliceInfo, SExprSupp
     switch (pSliceInfo->fillType) {
       case TSDB_FILL_NULL:
       case TSDB_FILL_NULL_F: {
-        colDataAppendNULL(pDst, rows);
+        colDataSetNULL(pDst, rows);
         break;
       }
 
@@ -225,7 +225,7 @@ static bool genInterpolationResult(STimeSliceOperatorInfo* pSliceInfo, SExprSupp
         }
 
         if (start.key == INT64_MIN || end.key == INT64_MIN) {
-          colDataAppendNULL(pDst, rows);
+          colDataSetNULL(pDst, rows);
           break;
         }
 
@@ -246,7 +246,7 @@ static bool genInterpolationResult(STimeSliceOperatorInfo* pSliceInfo, SExprSupp
         if (pkey->isNull == false) {
           colDataSetVal(pDst, rows, pkey->pData, false);
         } else {
-          colDataAppendNULL(pDst, rows);
+          colDataSetNULL(pDst, rows);
         }
         break;
       }
@@ -261,7 +261,7 @@ static bool genInterpolationResult(STimeSliceOperatorInfo* pSliceInfo, SExprSupp
         if (pkey->isNull == false) {
           colDataSetVal(pDst, rows, pkey->pData, false);
         } else {
-          colDataAppendNULL(pDst, rows);
+          colDataSetNULL(pDst, rows);
         }
         break;
       }
@@ -295,7 +295,7 @@ static void addCurrentRowToResult(STimeSliceOperatorInfo* pSliceInfo, SExprSupp*
       SColumnInfoData* pSrc = taosArrayGet(pSrcBlock->pDataBlock, srcSlot);
 
       if (colDataIsNull_s(pSrc, index)) {
-        colDataAppendNULL(pDst, pResBlock->info.rows);
+        colDataSetNULL(pDst, pResBlock->info.rows);
         continue;
       }
 

source/libs/executor/src/timewindowoperator.c

@@ -3277,20 +3277,20 @@ void doBuildDeleteDataBlock(SOperatorInfo* pOp, SSHashObj* pStDeleted, SSDataBlo
     SColumnInfoData* pEndTsCol = taosArrayGet(pBlock->pDataBlock, END_TS_COLUMN_INDEX);
     colDataSetVal(pEndTsCol, pBlock->info.rows, (const char*)&res->win.skey, false);
     SColumnInfoData* pUidCol = taosArrayGet(pBlock->pDataBlock, UID_COLUMN_INDEX);
-    colDataAppendNULL(pUidCol, pBlock->info.rows);
+    colDataSetNULL(pUidCol, pBlock->info.rows);
     SColumnInfoData* pGpCol = taosArrayGet(pBlock->pDataBlock, GROUPID_COLUMN_INDEX);
     colDataSetVal(pGpCol, pBlock->info.rows, (const char*)&res->groupId, false);
     SColumnInfoData* pCalStCol = taosArrayGet(pBlock->pDataBlock, CALCULATE_START_TS_COLUMN_INDEX);
-    colDataAppendNULL(pCalStCol, pBlock->info.rows);
+    colDataSetNULL(pCalStCol, pBlock->info.rows);
     SColumnInfoData* pCalEdCol = taosArrayGet(pBlock->pDataBlock, CALCULATE_END_TS_COLUMN_INDEX);
-    colDataAppendNULL(pCalEdCol, pBlock->info.rows);
+    colDataSetNULL(pCalEdCol, pBlock->info.rows);
 
     SColumnInfoData* pTableCol = taosArrayGet(pBlock->pDataBlock, TABLE_NAME_COLUMN_INDEX);
 
     void* tbname = NULL;
     streamStateGetParName(pOp->pTaskInfo->streamInfo.pState, res->groupId, &tbname);
     if (tbname == NULL) {
-      colDataAppendNULL(pTableCol, pBlock->info.rows);
+      colDataSetNULL(pTableCol, pBlock->info.rows);
     } else {
       char parTbName[VARSTR_HEADER_SIZE + TSDB_TABLE_NAME_LEN];
       STR_WITH_MAXSIZE_TO_VARSTR(parTbName, tbname, sizeof(parTbName));

source/libs/scalar/src/scalar.c

@@ -337,7 +337,7 @@ int32_t sclInitParam(SNode *node, SScalarParam *param, SScalarCtx *ctx, int32_t
         SCL_RET(TSDB_CODE_OUT_OF_MEMORY);
       }
       if (TSDB_DATA_TYPE_NULL == valueNode->node.resType.type || valueNode->isNull) {
-        colDataAppendNULL(param->columnData, 0);
+        colDataSetNULL(param->columnData, 0);
       } else {
         colDataSetVal(param->columnData, 0, nodesGetValueFromNode(valueNode), false);
       }

source/libs/scalar/src/sclfunc.c

@@ -2606,7 +2606,7 @@ int32_t stateCountScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalar
 
   for (int32_t i = 0; i < pInput->numOfRows; ++i) {
     if (colDataIsNull_s(pInputData, i)) {
-      colDataAppendNULL(pOutputData, i);
+      colDataSetNULL(pOutputData, i);
       continue;
     }
 
@@ -2632,7 +2632,7 @@ int32_t stateDurationScalarFunction(SScalarParam *pInput, int32_t inputNum, SSca
 
   for (int32_t i = 0; i < pInput->numOfRows; ++i) {
     if (colDataIsNull_s(pInputData, i)) {
-      colDataAppendNULL(pOutputData, i);
+      colDataSetNULL(pOutputData, i);
       continue;
     }
 
@@ -2898,7 +2898,7 @@ int32_t selectScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarPara
 
   for (int32_t i = 0; i < pInput->numOfRows; ++i) {
     if (colDataIsNull_s(pInputData, i)) {
-      colDataAppendNULL(pOutputData, 0);
+      colDataSetNULL(pOutputData, 0);
       continue;
     }
 

source/libs/scalar/src/sclvector.c

@@ -1247,7 +1247,7 @@ static void vectorMathMultiplyHelper(SColumnInfoData *pLeftCol, SColumnInfoData
   } else {
     for (; i >= 0 && i < numOfRows; i += step, output += 1) {
       if (IS_HELPER_NULL(pLeftCol, i)) {
-        colDataAppendNULL(pOutputCol, i);
+        colDataSetNULL(pOutputCol, i);
         continue;  // TODO set null or ignore
       }
       *output = getVectorDoubleValueFnLeft(LEFT_COL, i) * getVectorDoubleValueFnRight(RIGHT_COL, 0);
@@ -1273,7 +1273,7 @@ void vectorMathMultiply(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam
   if (pLeft->numOfRows == pRight->numOfRows) {
     for (; i < pRight->numOfRows && i >= 0; i += step, output += 1) {
       if (IS_NULL) {
-        colDataAppendNULL(pOutputCol, i);
+        colDataSetNULL(pOutputCol, i);
         continue;  // TODO set null or ignore
       }
       *output = getVectorDoubleValueFnLeft(LEFT_COL, i) * getVectorDoubleValueFnRight(RIGHT_COL, i);
@@ -1306,7 +1306,7 @@ void vectorMathDivide(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam *p
   if (pLeft->numOfRows == pRight->numOfRows) {
     for (; i < pRight->numOfRows && i >= 0; i += step, output += 1) {
       if (IS_NULL || (getVectorDoubleValueFnRight(RIGHT_COL, i) == 0)) {  // divide by 0 check
-        colDataAppendNULL(pOutputCol, i);
+        colDataSetNULL(pOutputCol, i);
         continue;
       }
       *output = getVectorDoubleValueFnLeft(LEFT_COL, i) / getVectorDoubleValueFnRight(RIGHT_COL, i);
@@ -1317,7 +1317,7 @@ void vectorMathDivide(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam *p
     } else {
       for (; i >= 0 && i < pRight->numOfRows; i += step, output += 1) {
         if (IS_HELPER_NULL(pRightCol, i) || (getVectorDoubleValueFnRight(RIGHT_COL, i) == 0)) {  // divide by 0 check
-          colDataAppendNULL(pOutputCol, i);
+          colDataSetNULL(pOutputCol, i);
           continue;
         }
         *output = getVectorDoubleValueFnLeft(LEFT_COL, 0) / getVectorDoubleValueFnRight(RIGHT_COL, i);
@@ -1330,7 +1330,7 @@ void vectorMathDivide(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam *p
     } else {
       for (; i >= 0 && i < pLeft->numOfRows; i += step, output += 1) {
         if (IS_HELPER_NULL(pLeftCol, i)) {
-          colDataAppendNULL(pOutputCol, i);
+          colDataSetNULL(pOutputCol, i);
           continue;
         }
         *output = getVectorDoubleValueFnLeft(LEFT_COL, i) / getVectorDoubleValueFnRight(RIGHT_COL, 0);
@@ -1361,14 +1361,14 @@ void vectorMathRemainder(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam
   if (pLeft->numOfRows == pRight->numOfRows) {
     for (; i < pRight->numOfRows && i >= 0; i += step, output += 1) {
       if (IS_NULL) {
-        colDataAppendNULL(pOutputCol, i);
+        colDataSetNULL(pOutputCol, i);
         continue;
       }
 
       double lx = getVectorDoubleValueFnLeft(LEFT_COL, i);
       double rx = getVectorDoubleValueFnRight(RIGHT_COL, i);
       if (isnan(lx) || isinf(lx) || isnan(rx) || isinf(rx) || FLT_EQUAL(rx, 0)) {
-        colDataAppendNULL(pOutputCol, i);
+        colDataSetNULL(pOutputCol, i);
         continue;
       }
 
@@ -1381,13 +1381,13 @@ void vectorMathRemainder(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam
     } else {
       for (; i >= 0 && i < pRight->numOfRows; i += step, output += 1) {
         if (IS_HELPER_NULL(pRightCol, i)) {
-          colDataAppendNULL(pOutputCol, i);
+          colDataSetNULL(pOutputCol, i);
           continue;
         }
 
         double rx = getVectorDoubleValueFnRight(RIGHT_COL, i);
         if (isnan(rx) || isinf(rx) || FLT_EQUAL(rx, 0)) {
-          colDataAppendNULL(pOutputCol, i);
+          colDataSetNULL(pOutputCol, i);
           continue;
         }
 
@@ -1401,13 +1401,13 @@ void vectorMathRemainder(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam
     } else {
       for (; i >= 0 && i < pLeft->numOfRows; i += step, output += 1) {
         if (IS_HELPER_NULL(pLeftCol, i)) {
-          colDataAppendNULL(pOutputCol, i);
+          colDataSetNULL(pOutputCol, i);
           continue;
         }
 
         double lx = getVectorDoubleValueFnLeft(LEFT_COL, i);
         if (isnan(lx) || isinf(lx)) {
-          colDataAppendNULL(pOutputCol, i);
+          colDataSetNULL(pOutputCol, i);
           continue;
         }
 
@@ -1436,7 +1436,7 @@ void vectorMathMinus(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam *pO
   double *output = (double *)pOutputCol->pData;
   for (; i < pLeft->numOfRows && i >= 0; i += step, output += 1) {
     if (IS_HELPER_NULL(pLeftCol, i)) {
-      colDataAppendNULL(pOutputCol, i);
+      colDataSetNULL(pOutputCol, i);
       continue;
     }
     double result = getVectorDoubleValueFnLeft(LEFT_COL, i);
@@ -1475,7 +1475,7 @@ static void vectorBitAndHelper(SColumnInfoData *pLeftCol, SColumnInfoData *pRigh
   } else {
     for (; i >= 0 && i < numOfRows; i += step, output += 1) {
       if (IS_HELPER_NULL(pLeftCol, i)) {
-        colDataAppendNULL(pOutputCol, i);
+        colDataSetNULL(pOutputCol, i);
         continue;  // TODO set null or ignore
       }
       *output = getVectorBigintValueFnLeft(LEFT_COL, i) & getVectorBigintValueFnRight(RIGHT_COL, 0);
@@ -1501,7 +1501,7 @@ void vectorBitAnd(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam *pOut,
   if (pLeft->numOfRows == pRight->numOfRows) {
     for (; i < pRight->numOfRows && i >= 0; i += step, output += 1) {
       if (IS_NULL) {
-        colDataAppendNULL(pOutputCol, i);
+        colDataSetNULL(pOutputCol, i);
         continue;  // TODO set null or ignore
       }
       *output = getVectorBigintValueFnLeft(LEFT_COL, i) & getVectorBigintValueFnRight(RIGHT_COL, i);
@@ -1529,7 +1529,7 @@ static void vectorBitOrHelper(SColumnInfoData *pLeftCol, SColumnInfoData *pRight
     int64_t rx = getVectorBigintValueFnRight(RIGHT_COL, 0);
     for (; i >= 0 && i < numOfRows; i += step, output += 1) {
       if (IS_HELPER_NULL(pLeftCol, i)) {
-        colDataAppendNULL(pOutputCol, i);
+        colDataSetNULL(pOutputCol, i);
         continue;  // TODO set null or ignore
       }
       *output = getVectorBigintValueFnLeft(LEFT_COL, i) | rx;
@@ -1555,7 +1555,7 @@ void vectorBitOr(SScalarParam *pLeft, SScalarParam *pRight, SScalarParam *pOut,
   if (pLeft->numOfRows == pRight->numOfRows) {
     for (; i < pRight->numOfRows && i >= 0; i += step, output += 1) {
       if (IS_NULL) {
-        colDataAppendNULL(pOutputCol, i);
+        colDataSetNULL(pOutputCol, i);
         continue;  // TODO set null or ignore
       }
       *output = getVectorBigintValueFnLeft(LEFT_COL, i) | getVectorBigintValueFnRight(RIGHT_COL, i);