diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index 5fe64fef64..0adabed626 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -579,6 +579,7 @@ typedef struct SStreamIntervalOperatorInfo {
   SSDataBlock*       pPullDataRes;
   bool               isFinal;
   SArray*            pChildren;
+  int32_t            numOfChild;
   SStreamState*      pState;
   SWinKey            delKey;
   uint64_t           numOfDatapack;
diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index c2d2e92c79..89bce58cce 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -1541,14 +1541,6 @@ void destroyStreamFinalIntervalOperatorInfo(void* param) {
   streamFileStateDestroy(pInfo->pState->pFileState);
   taosMemoryFreeClear(pInfo->pState);
 
-  if (pInfo->pChildren) {
-    int32_t size = taosArrayGetSize(pInfo->pChildren);
-    for (int32_t i = 0; i < size; i++) {
-      SOperatorInfo* pChildOp = taosArrayGetP(pInfo->pChildren, i);
-      destroyOperatorInfo(pChildOp);
-    }
-    taosArrayDestroy(pInfo->pChildren);
-  }
   nodesDestroyNode((SNode*)pInfo->pPhyNode);
   colDataDestroy(&pInfo->twAggSup.timeWindowData);
   pInfo->groupResInfo.pRows = taosArrayDestroy(pInfo->groupResInfo.pRows);
@@ -2081,58 +2073,6 @@ int32_t setIntervalOutputBuf(SStreamState* pState, STimeWindow* win, SRowBuffPos
   return TSDB_CODE_SUCCESS;
 }
 
-static void rebuildIntervalWindow(SOperatorInfo* pOperator, SArray* pWinArray, SSHashObj* pUpdatedMap) {
-  SStreamIntervalOperatorInfo* pInfo = pOperator->info;
-  SExecTaskInfo*               pTaskInfo = pOperator->pTaskInfo;
-  int32_t                      size = taosArrayGetSize(pWinArray);
-  int32_t                      numOfOutput = pOperator->exprSupp.numOfExprs;
-  SExprSupp*                   pSup = &pOperator->exprSupp;
-  if (!pInfo->pChildren) {
-    return;
-  }
-  for (int32_t i = 0; i < size; i++) {
-    SWinKey*     pWinRes = taosArrayGet(pWinArray, i);
-    SRowBuffPos* pCurResPos = NULL;
-    SResultRow*  pCurResult = NULL;
-    STimeWindow  parentWin = getFinalTimeWindow(pWinRes->ts, &pInfo->interval);
-    if (isDeletedStreamWindow(&parentWin, pWinRes->groupId, pInfo->pState, &pInfo->twAggSup)) {
-      continue;
-    }
-
-    int32_t numOfChildren = taosArrayGetSize(pInfo->pChildren);
-    int32_t num = 0;
-    for (int32_t j = 0; j < numOfChildren; j++) {
-      SOperatorInfo*               pChildOp = taosArrayGetP(pInfo->pChildren, j);
-      SStreamIntervalOperatorInfo* pChInfo = pChildOp->info;
-      SExprSupp*                   pChildSup = &pChildOp->exprSupp;
-      if (!hasIntervalWindow(pChInfo->pState, pWinRes)) {
-        continue;
-      }
-      if (num == 0) {
-        int32_t code = setIntervalOutputBuf(pInfo->pState, &parentWin, &pCurResPos, pWinRes->groupId, pSup->pCtx,
-                                            numOfOutput, pSup->rowEntryInfoOffset, &pInfo->aggSup);
-        ASSERT(pCurResPos != NULL);
-        pCurResult = (SResultRow*)pCurResPos->pRowBuff;
-        if (code != TSDB_CODE_SUCCESS || pCurResult == NULL) {
-          T_LONG_JMP(pTaskInfo->env, TSDB_CODE_OUT_OF_MEMORY);
-        }
-      }
-      num++;
-      SRowBuffPos* pChResPos = NULL;
-      SResultRow*  pChResult = NULL;
-      setIntervalOutputBuf(pChInfo->pState, &parentWin, &pChResPos, pWinRes->groupId, pChildSup->pCtx,
-                           pChildSup->numOfExprs, pChildSup->rowEntryInfoOffset, &pChInfo->aggSup);
-      pChResult = (SResultRow*)pChResPos->pRowBuff;
-      updateTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &parentWin, true);
-      compactFunctions(pSup->pCtx, pChildSup->pCtx, numOfOutput, pTaskInfo, &pInfo->twAggSup.timeWindowData);
-    }
-    if (num > 0 && pUpdatedMap) {
-      saveWinResultInfo(pCurResult->win.skey, pWinRes->groupId, pCurResPos, pUpdatedMap);
-      saveOutputBuf(pInfo->pState, pWinRes, pCurResult, pInfo->aggSup.resultRowSize);
-    }
-  }
-}
-
 bool isDeletedStreamWindow(STimeWindow* pWin, uint64_t groupId, SStreamState* pState, STimeWindowAggSupp* pTwSup) {
   if (pTwSup->maxTs != INT64_MIN && pWin->ekey < pTwSup->maxTs - pTwSup->deleteMark) {
     SWinKey key = {.ts = pWin->skey, .groupId = groupId};
@@ -2250,9 +2190,8 @@ static void addRetriveWindow(SArray* wins, SStreamIntervalOperatorInfo* pInfo) {
           .window = nextWin, .groupId = winKey->groupId, .calWin.skey = nextWin.skey, .calWin.ekey = nextWin.skey};
       // add pull data request
       if (savePullWindow(&pull, pInfo->pPullWins) == TSDB_CODE_SUCCESS) {
-        int32_t size1 = taosArrayGetSize(pInfo->pChildren);
-        addPullWindow(pInfo->pPullDataMap, winKey, size1);
-        qDebug("===stream===prepare retrive for delete %" PRId64 ", size:%d", winKey->ts, size1);
+        addPullWindow(pInfo->pPullDataMap, winKey, pInfo->numOfChild);
+        qDebug("===stream===prepare retrive for delete %" PRId64 ", size:%d", winKey->ts, pInfo->numOfChild);
       }
     }
   }
@@ -2413,7 +2352,7 @@ static void doStreamIntervalAggImpl(SOperatorInfo* pOperatorInfo, SSDataBlock* p
       continue;
     }
 
-    if (IS_FINAL_OP(pInfo) && pInfo->pChildren) {
+    if (IS_FINAL_OP(pInfo) && pInfo->numOfChild > 0) {
       bool    ignore = true;
       SWinKey winRes = {
           .ts = nextWin.skey,
@@ -2425,8 +2364,7 @@ static void doStreamIntervalAggImpl(SOperatorInfo* pOperatorInfo, SSDataBlock* p
             .window = nextWin, .groupId = groupId, .calWin.skey = nextWin.skey, .calWin.ekey = nextWin.skey};
         // add pull data request
         if (savePullWindow(&pull, pInfo->pPullWins) == TSDB_CODE_SUCCESS) {
-          int32_t size = taosArrayGetSize(pInfo->pChildren);
-          addPullWindow(pInfo->pPullDataMap, &winRes, size);
+          addPullWindow(pInfo->pPullDataMap, &winRes, pInfo->numOfChild);
         }
       } else {
         int32_t index = -1;
@@ -2780,24 +2718,7 @@ SOperatorInfo* createStreamFinalIntervalOperatorInfo(SOperatorInfo* downstream,
   streamStateSetNumber(pInfo->pState, -1);
 
   initResultRowInfo(&pInfo->binfo.resultRowInfo);
-  pInfo->pChildren = NULL;
-  if (numOfChild > 0) {
-    pInfo->pChildren = taosArrayInit(numOfChild, sizeof(void*));
-    if (!pInfo->pChildren) {
-      goto _error;
-    }
-    for (int32_t i = 0; i < numOfChild; i++) {
-      SOperatorInfo* pChildOp = createStreamFinalIntervalOperatorInfo(NULL, pPhyNode, pTaskInfo, 0);
-      if (pChildOp) {
-        SStreamIntervalOperatorInfo* pChInfo = pChildOp->info;
-        pChInfo->twAggSup.calTrigger = STREAM_TRIGGER_AT_ONCE;
-        taosArrayPush(pInfo->pChildren, &pChildOp);
-        streamStateSetNumber(pChInfo->pState, i);
-        continue;
-      }
-      goto _error;
-    }
-  }
+  pInfo->numOfChild = numOfChild;
 
   pInfo->pPhyNode = (SPhysiNode*)nodesCloneNode((SNode*)pPhyNode);
 
@@ -3337,13 +3258,13 @@ static void rebuildSessionWindow(SOperatorInfo* pOperator, SArray* pWinArray, SS
   SStreamSessionAggOperatorInfo* pInfo = pOperator->info;
   SStreamAggSupporter*           pAggSup = &pInfo->streamAggSup;
   int32_t                        numOfOutput = pSup->numOfExprs;
-  int32_t                        numOfChildren = taosArrayGetSize(pInfo->pChildren);
+  int32_t                        numOfChild = taosArrayGetSize(pInfo->pChildren);
 
   for (int32_t i = 0; i < size; i++) {
     SSessionKey*      pWinKey = taosArrayGet(pWinArray, i);
     int32_t           num = 0;
     SResultWindowInfo parentWin = {0};
-    for (int32_t j = 0; j < numOfChildren; j++) {
+    for (int32_t j = 0; j < numOfChild; j++) {
       SOperatorInfo*                 pChild = taosArrayGetP(pInfo->pChildren, j);
       SStreamSessionAggOperatorInfo* pChInfo = pChild->info;
       SStreamAggSupporter*           pChAggSup = &pChInfo->streamAggSup;
@@ -4995,7 +4916,7 @@ SOperatorInfo* createStreamIntervalOperatorInfo(SOperatorInfo* downstream, SPhys
   pInfo->pullIndex = 0;
   pInfo->pPullDataRes = NULL;
   pInfo->isFinal = false;
-  pInfo->pChildren = NULL;
+  pInfo->numOfChild = 0;
   pInfo->delKey.ts = INT64_MAX;
   pInfo->delKey.groupId = 0;
   pInfo->numOfDatapack = 0;