diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 3ec8085b86..aaef411d2d 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -2789,6 +2789,8 @@ static SSDataBlock* doFillImpl(SOperatorInfo* pOperator) {
       blockDataUpdateTsWindow(pBlock, pInfo->primarySrcSlotId);
 
       blockDataCleanup(pInfo->pRes);
+      blockDataEnsureCapacity(pInfo->pRes, pBlock->info.rows);
+      blockDataEnsureCapacity(pInfo->pFinalRes, pBlock->info.rows);
       doApplyScalarCalculation(pOperator, pBlock, order, scanFlag);
 
       if (pInfo->curGroupId == 0 || pInfo->curGroupId == pInfo->pRes->info.groupId) {