diff --git a/source/libs/executor/inc/tfill.h b/source/libs/executor/inc/tfill.h
index fad4059515f386ca94ce2c97985184ff4b95f744..726f0df1e85877de7e00babad2a14148734a5953 100644
--- a/source/libs/executor/inc/tfill.h
+++ b/source/libs/executor/inc/tfill.h
@@ -92,8 +92,8 @@ typedef struct SResultRowData {
 
 typedef struct SStreamFillLinearInfo {
   TSKEY   nextEnd;
-  SArray* pDeltaVal;      // double. value for Fill(linear).
-  SArray* pNextDeltaVal;  // double. value for Fill(linear).
+  SArray* pEndPoints;
+  SArray* pNextEndPoints;
   int64_t winIndex;
   bool    hasNext;
 } SStreamFillLinearInfo;
diff --git a/source/libs/executor/src/filloperator.c b/source/libs/executor/src/filloperator.c
index 2a33e3527ac02b82cb12832b8f484d321f1b220e..234f1a666ce58bdd006f9768f1b076b29e5c1bf7 100644
--- a/source/libs/executor/src/filloperator.c
+++ b/source/libs/executor/src/filloperator.c
@@ -447,9 +447,14 @@ void* destroyStreamFillSupporter(SStreamFillSupporter* pFillSup) {
   return NULL;
 }
 
+void destroySPoint(void* ptr) {
+  SPoint* point = (SPoint*) ptr;
+  taosMemoryFreeClear(point->val);
+}
+
 void* destroyStreamFillLinearInfo(SStreamFillLinearInfo* pFillLinear) {
-  taosArrayDestroy(pFillLinear->pDeltaVal);
-  taosArrayDestroy(pFillLinear->pNextDeltaVal);
+  taosArrayDestroyEx(pFillLinear->pEndPoints, destroySPoint);
+  taosArrayDestroyEx(pFillLinear->pNextEndPoints, destroySPoint);
   taosMemoryFree(pFillLinear);
   return NULL;
 }
@@ -611,19 +616,15 @@ static void calcDeltaData(SSDataBlock* pBlock, int32_t rowId, SResultRowData* pR
   }
 }
 
-static void calcRowDeltaData(SResultRowData* pStartRow, SResultRowData* pEndRow, SArray* pDelta, SFillColInfo* pFillCol,
-                             int32_t numOfCol, int32_t winCount) {
+static void calcRowDeltaData(SResultRowData* pEndRow, SArray* pEndPoins, SFillColInfo* pFillCol,
+                             int32_t numOfCol) {
   for (int32_t i = 0; i < numOfCol; i++) {
     if (!pFillCol[i].notFillCol) {
       int32_t          slotId = GET_DEST_SLOT_ID(pFillCol + i);
-      SResultCellData* pSCell = getResultCell(pStartRow, slotId);
-      double           start = 0.0;
-      GET_TYPED_DATA(start, double, pSCell->type, pSCell->pData);
       SResultCellData* pECell = getResultCell(pEndRow, slotId);
-      double           end = 0.0;
-      GET_TYPED_DATA(end, double, pECell->type, pECell->pData);
-      double delta = (end - start) / winCount;
-      taosArraySet(pDelta, slotId, &delta);
+      SPoint* pPoint = taosArrayGet(pEndPoins, slotId);
+      pPoint->key = pEndRow->key;
+      memcpy(pPoint->val, pECell->pData, pECell->bytes);
     }
   }
 }
@@ -674,10 +675,8 @@ void setDeleteFillValueInfo(TSKEY start, TSKEY end, SStreamFillSupporter* pFillS
       setFillKeyInfo(pFillSup->prev.key, pFillSup->next.key, &pFillSup->interval, pFillInfo);
       pFillInfo->pLinearInfo->hasNext = false;
       pFillInfo->pLinearInfo->nextEnd = INT64_MIN;
-      int32_t numOfWins = taosTimeCountInterval(pFillSup->prev.key, pFillSup->next.key, pFillSup->interval.sliding,
-                                                pFillSup->interval.slidingUnit, pFillSup->interval.precision);
-      calcRowDeltaData(&pFillSup->prev, &pFillSup->next, pFillInfo->pLinearInfo->pDeltaVal, pFillSup->pAllColInfo,
-                       pFillSup->numOfAllCols, numOfWins);
+      calcRowDeltaData(&pFillSup->next, pFillInfo->pLinearInfo->pEndPoints, pFillSup->pAllColInfo,
+                       pFillSup->numOfAllCols);
       pFillInfo->pResRow = &pFillSup->prev;
       pFillInfo->pLinearInfo->winIndex = 0;
     } break;
@@ -780,25 +779,19 @@ void setFillValueInfo(SSDataBlock* pBlock, TSKEY ts, int32_t rowId, SStreamFillS
         setFillKeyInfo(prevWKey, ts, &pFillSup->interval, pFillInfo);
         pFillInfo->pos = FILL_POS_MID;
         pFillInfo->pLinearInfo->nextEnd = nextWKey;
-        int32_t numOfWins = taosTimeCountInterval(prevWKey, ts, pFillSup->interval.sliding,
-                                                  pFillSup->interval.slidingUnit, pFillSup->interval.precision);
-        calcRowDeltaData(&pFillSup->prev, &pFillSup->cur, pFillInfo->pLinearInfo->pDeltaVal, pFillSup->pAllColInfo,
-                         pFillSup->numOfAllCols, numOfWins);
+        calcRowDeltaData(&pFillSup->cur, pFillInfo->pLinearInfo->pEndPoints, pFillSup->pAllColInfo,
+                         pFillSup->numOfAllCols);
         pFillInfo->pResRow = &pFillSup->prev;
 
-        numOfWins = taosTimeCountInterval(ts, nextWKey, pFillSup->interval.sliding, pFillSup->interval.slidingUnit,
-                                          pFillSup->interval.precision);
-        calcRowDeltaData(&pFillSup->cur, &pFillSup->next, pFillInfo->pLinearInfo->pNextDeltaVal, pFillSup->pAllColInfo,
-                         pFillSup->numOfAllCols, numOfWins);
+        calcRowDeltaData(&pFillSup->next, pFillInfo->pLinearInfo->pNextEndPoints, pFillSup->pAllColInfo,
+                         pFillSup->numOfAllCols);
         pFillInfo->pLinearInfo->hasNext = true;
       } else if (hasPrevWindow(pFillSup)) {
         setFillKeyInfo(prevWKey, ts, &pFillSup->interval, pFillInfo);
         pFillInfo->pos = FILL_POS_END;
         pFillInfo->pLinearInfo->nextEnd = INT64_MIN;
-        int32_t numOfWins = taosTimeCountInterval(prevWKey, ts, pFillSup->interval.sliding,
-                                                  pFillSup->interval.slidingUnit, pFillSup->interval.precision);
-        calcRowDeltaData(&pFillSup->prev, &pFillSup->cur, pFillInfo->pLinearInfo->pDeltaVal, pFillSup->pAllColInfo,
-                         pFillSup->numOfAllCols, numOfWins);
+        calcRowDeltaData(&pFillSup->cur, pFillInfo->pLinearInfo->pEndPoints, pFillSup->pAllColInfo,
+                         pFillSup->numOfAllCols);
         pFillInfo->pResRow = &pFillSup->prev;
         pFillInfo->pLinearInfo->hasNext = false;
       } else {
@@ -806,10 +799,8 @@ void setFillValueInfo(SSDataBlock* pBlock, TSKEY ts, int32_t rowId, SStreamFillS
         setFillKeyInfo(ts, nextWKey, &pFillSup->interval, pFillInfo);
         pFillInfo->pos = FILL_POS_START;
         pFillInfo->pLinearInfo->nextEnd = INT64_MIN;
-        int32_t numOfWins = taosTimeCountInterval(ts, nextWKey, pFillSup->interval.sliding,
-                                                  pFillSup->interval.slidingUnit, pFillSup->interval.precision);
-        calcRowDeltaData(&pFillSup->cur, &pFillSup->next, pFillInfo->pLinearInfo->pDeltaVal, pFillSup->pAllColInfo,
-                         pFillSup->numOfAllCols, numOfWins);
+        calcRowDeltaData(&pFillSup->next, pFillInfo->pLinearInfo->pEndPoints, pFillSup->pAllColInfo,
+                         pFillSup->numOfAllCols);
         pFillInfo->pResRow = &pFillSup->cur;
         pFillInfo->pLinearInfo->hasNext = false;
       }
@@ -906,13 +897,18 @@ static void doStreamFillLinear(SStreamFillSupporter* pFillSup, SStreamFillInfo*
           colDataSetNULL(pColData, index);
           continue;
         }
-        double* pDelta = taosArrayGet(pFillInfo->pLinearInfo->pDeltaVal, slotId);
+        SPoint* pEnd = taosArrayGet(pFillInfo->pLinearInfo->pEndPoints, slotId);
         double  vCell = 0;
-        GET_TYPED_DATA(vCell, double, pCell->type, pCell->pData);
-        vCell += (*pDelta) * pFillInfo->pLinearInfo->winIndex;
-        int64_t result = 0;
-        SET_TYPED_DATA(&result, pCell->type, vCell);
-        colDataSetVal(pColData, index, (const char*)&result, false);
+        SPoint start = {0};
+        start.key = pFillInfo->pResRow->key;
+        start.val = pCell->pData;
+
+        SPoint cur = {0};
+        cur.key = pFillInfo->current;
+        cur.val = taosMemoryCalloc(1, pCell->bytes);
+        taosGetLinearInterpolationVal(&cur, pCell->type, &start, pEnd, pCell->type);
+        colDataSetVal(pColData, index, (const char*)cur.val, false);
+        destroySPoint(&cur);
       }
     }
     pFillInfo->current = taosTimeAdd(pFillInfo->current, pFillSup->interval.sliding, pFillSup->interval.slidingUnit,
@@ -953,8 +949,7 @@ static void doStreamFillRange(SStreamFillInfo* pFillInfo, SStreamFillSupporter*
     if (pFillInfo->current > pFillInfo->end && pFillInfo->pLinearInfo->hasNext) {
       pFillInfo->pLinearInfo->hasNext = false;
       pFillInfo->pLinearInfo->winIndex = 0;
-      taosArrayClear(pFillInfo->pLinearInfo->pDeltaVal);
-      taosArrayAddAll(pFillInfo->pLinearInfo->pDeltaVal, pFillInfo->pLinearInfo->pNextDeltaVal);
+      taosArraySwap(pFillInfo->pLinearInfo->pEndPoints, pFillInfo->pLinearInfo->pNextEndPoints);
       pFillInfo->pResRow = &pFillSup->cur;
       setFillKeyInfo(pFillSup->cur.key, pFillInfo->pLinearInfo->nextEnd, &pFillSup->interval, pFillInfo);
       doStreamFillLinear(pFillSup, pFillInfo, pRes);
@@ -1359,15 +1354,19 @@ SStreamFillInfo* initStreamFillInfo(SStreamFillSupporter* pFillSup, SSDataBlock*
   pFillInfo->pLinearInfo = taosMemoryCalloc(1, sizeof(SStreamFillLinearInfo));
   pFillInfo->pLinearInfo->hasNext = false;
   pFillInfo->pLinearInfo->nextEnd = INT64_MIN;
-  pFillInfo->pLinearInfo->pDeltaVal = NULL;
-  pFillInfo->pLinearInfo->pNextDeltaVal = NULL;
+  pFillInfo->pLinearInfo->pEndPoints = NULL;
+  pFillInfo->pLinearInfo->pNextEndPoints = NULL;
   if (pFillSup->type == TSDB_FILL_LINEAR) {
-    pFillInfo->pLinearInfo->pDeltaVal = taosArrayInit(pFillSup->numOfAllCols, sizeof(double));
-    pFillInfo->pLinearInfo->pNextDeltaVal = taosArrayInit(pFillSup->numOfAllCols, sizeof(double));
+    pFillInfo->pLinearInfo->pEndPoints = taosArrayInit(pFillSup->numOfAllCols, sizeof(SPoint));
+    pFillInfo->pLinearInfo->pNextEndPoints = taosArrayInit(pFillSup->numOfAllCols, sizeof(SPoint));
     for (int32_t i = 0; i < pFillSup->numOfAllCols; i++) {
-      double value = 0.0;
-      taosArrayPush(pFillInfo->pLinearInfo->pDeltaVal, &value);
-      taosArrayPush(pFillInfo->pLinearInfo->pNextDeltaVal, &value);
+      SColumnInfoData* pColData = taosArrayGet(pRes->pDataBlock, i);
+      SPoint value = {0};
+      value.val = taosMemoryCalloc(1, pColData->info.bytes);
+      taosArrayPush(pFillInfo->pLinearInfo->pEndPoints, &value);
+
+      value.val = taosMemoryCalloc(1, pColData->info.bytes);
+      taosArrayPush(pFillInfo->pLinearInfo->pNextEndPoints, &value);
     }
   }
   pFillInfo->pLinearInfo->winIndex = 0;