diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index b4489a92fb..6778e97d7a 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -2215,6 +2215,7 @@ static void genInterpolationResult(STimeSliceOperatorInfo* pSliceInfo, SExprSupp
           colDataAppend(pDst, rows, (char *)current.val, false);
         }
 
+        taosMemoryFree(current.val);
         pResBlock->info.rows += 1;
         break;
       }
@@ -2437,10 +2438,10 @@ static SSDataBlock* doTimeslice(SOperatorInfo* pOperator) {
         // if its the last point in data block, no need to fill, but reserve this point as the start value and do
         // the interpolation when processing next data block.
         if (pSliceInfo->fillType == TSDB_FILL_LINEAR) {
-          doKeepLinearInfo(pSliceInfo, pBlock, i, false);
           pSliceInfo->current =
               taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit, pInterval->precision);
           if (i < pBlock->info.rows - 1) {
+            doKeepLinearInfo(pSliceInfo, pBlock, i, false);
             int64_t nextTs = *(int64_t*)colDataGetData(pTsCol, i + 1);
             if (nextTs > pSliceInfo->current) {
               while (pSliceInfo->current < nextTs && pSliceInfo->current <= pSliceInfo->win.ekey) {
@@ -2478,11 +2479,11 @@ static SSDataBlock* doTimeslice(SOperatorInfo* pOperator) {
         doKeepPrevRows(pSliceInfo, pBlock, i);
 
         if (pSliceInfo->fillType == TSDB_FILL_LINEAR) {
-          doKeepLinearInfo(pSliceInfo, pBlock, i, false);
           // no need to increate pSliceInfo->current here
           //pSliceInfo->current =
           //    taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit, pInterval->precision);
           if (i < pBlock->info.rows - 1) {
+            doKeepLinearInfo(pSliceInfo, pBlock, i, false);
             int64_t nextTs = *(int64_t*)colDataGetData(pTsCol, i + 1);
             if (nextTs > pSliceInfo->current) {
               while (pSliceInfo->current < nextTs && pSliceInfo->current <= pSliceInfo->win.ekey) {
@@ -2558,10 +2559,10 @@ static SSDataBlock* doTimeslice(SOperatorInfo* pOperator) {
 
 
           if (pSliceInfo->fillType == TSDB_FILL_LINEAR) {
-            doKeepLinearInfo(pSliceInfo, pBlock, i, false);
             pSliceInfo->current =
                 taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit, pInterval->precision);
             if (i < pBlock->info.rows - 1) {
+              doKeepLinearInfo(pSliceInfo, pBlock, i, false);
               int64_t nextTs = *(int64_t*)colDataGetData(pTsCol, i + 1);
               if (nextTs > pSliceInfo->current) {
                 while (pSliceInfo->current < nextTs && pSliceInfo->current <= pSliceInfo->win.ekey) {
@@ -2618,6 +2619,35 @@ static SSDataBlock* doTimeslice(SOperatorInfo* pOperator) {
   return pResBlock->info.rows == 0 ? NULL : pResBlock;
 }
 
+void destroyTimeSliceOperatorInfo(void* param, int32_t numOfOutput) {
+  STimeSliceOperatorInfo* pInfo = (STimeSliceOperatorInfo*)param;
+
+  pInfo->pRes = blockDataDestroy(pInfo->pRes);
+
+  for (int32_t i = 0; i < taosArrayGetSize(pInfo->pPrevRow); ++i) {
+    SGroupKeys* pKey = taosArrayGet(pInfo->pPrevRow, i);
+    taosMemoryFree(pKey->pData);
+  }
+  taosArrayDestroy(pInfo->pPrevRow);
+
+  for (int32_t i = 0; i < taosArrayGetSize(pInfo->pNextRow); ++i) {
+    SGroupKeys* pKey = taosArrayGet(pInfo->pNextRow, i);
+    taosMemoryFree(pKey->pData);
+  }
+  taosArrayDestroy(pInfo->pNextRow);
+
+  for (int32_t i = 0; i < taosArrayGetSize(pInfo->pLinearInfo); ++i) {
+    SFillLinearInfo* pKey = taosArrayGet(pInfo->pLinearInfo, i);
+    taosMemoryFree(pKey->start.val);
+    taosMemoryFree(pKey->end.val);
+  }
+  taosArrayDestroy(pInfo->pLinearInfo);
+
+  taosMemoryFree(pInfo->pFillColInfo);
+  taosMemoryFreeClear(param);
+}
+
+
 SOperatorInfo* createTimeSliceOperatorInfo(SOperatorInfo* downstream, SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo) {
   STimeSliceOperatorInfo* pInfo = taosMemoryCalloc(1, sizeof(STimeSliceOperatorInfo));
   SOperatorInfo*          pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
@@ -2665,7 +2695,7 @@ SOperatorInfo* createTimeSliceOperatorInfo(SOperatorInfo* downstream, SPhysiNode
   pOperator->pTaskInfo = pTaskInfo;
 
   pOperator->fpSet =
-      createOperatorFpSet(operatorDummyOpenFn, doTimeslice, NULL, NULL, destroyBasicOperatorInfo, NULL, NULL, NULL);
+      createOperatorFpSet(operatorDummyOpenFn, doTimeslice, NULL, NULL, destroyTimeSliceOperatorInfo, NULL, NULL, NULL);
 
   blockDataEnsureCapacity(pInfo->pRes, pOperator->resultInfo.capacity);