diff --git a/src/query/inc/qExecutor.h b/src/query/inc/qExecutor.h
index 24547c1e0bdbfd86b9eb9a4ab45001733fea868e..955dd734cf58582ecfe1bbf9871525be0ebc161c 100644
--- a/src/query/inc/qExecutor.h
+++ b/src/query/inc/qExecutor.h
@@ -464,6 +464,7 @@ typedef struct SSWindowOperatorInfo {
   TSKEY          prevTs;     // previous timestamp
   int32_t        numOfRows;  // number of rows
   int32_t        start;      // start row index
+  bool           reptScan;    // next round scan
 } SSWindowOperatorInfo;
 
 typedef struct SStateWindowOperatorInfo {
@@ -473,7 +474,7 @@ typedef struct SStateWindowOperatorInfo {
   int32_t        colIndex;      // start row index
   int32_t        start;
   char*          prevData;    // previous data 
-   
+  bool           reptScan;
 } SStateWindowOperatorInfo ;
 
 typedef struct SDistinctOperatorInfo {
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 3c999fca0b35fafb0a34d298f8479e42060758ba..7bf5f9bba7e3de8c4973517038e0745eb3b66d35 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -30,6 +30,7 @@
 
 #define IS_MASTER_SCAN(runtime)        ((runtime)->scanFlag == MASTER_SCAN)
 #define IS_REVERSE_SCAN(runtime)       ((runtime)->scanFlag == REVERSE_SCAN)
+#define IS_REPEAT_SCAN(runtime)        ((runtime)->scanFlag == REPEAT_SCAN) 
 #define SET_MASTER_SCAN_FLAG(runtime)  ((runtime)->scanFlag = MASTER_SCAN)
 #define SET_REVERSE_SCAN_FLAG(runtime) ((runtime)->scanFlag = REVERSE_SCAN)
 
@@ -1336,6 +1337,10 @@ static void doSessionWindowAggImpl(SOperatorInfo* pOperator, SSWindowOperatorInf
 
   int64_t gap = pOperator->pRuntimeEnv->pQueryAttr->sw.gap;
   pInfo->numOfRows = 0;
+  if (IS_REPEAT_SCAN(pRuntimeEnv) && !pInfo->reptScan) {
+    pInfo->reptScan = true;
+    pInfo->prevTs = INT64_MIN;
+  }
 
   TSKEY* tsList = (TSKEY*)pColInfoData->pData;
   for (int32_t j = 0; j < pSDataBlock->info.rows; ++j) {
@@ -1345,7 +1350,7 @@ static void doSessionWindowAggImpl(SOperatorInfo* pOperator, SSWindowOperatorInf
       pInfo->prevTs = tsList[j];
       pInfo->numOfRows = 1;
       pInfo->start = j;
-    } else if (tsList[j] - pInfo->prevTs <= gap) {
+    } else if (tsList[j] - pInfo->prevTs <= gap && (tsList[j] - pInfo->prevTs) >= 0) {
       pInfo->curWindow.ekey = tsList[j];
       pInfo->prevTs = tsList[j];
       pInfo->numOfRows += 1;
@@ -5175,6 +5180,10 @@ static void doStateWindowAggImpl(SOperatorInfo* pOperator, SStateWindowOperatorI
 
   SColumnInfoData* pTsColInfoData = taosArrayGet(pSDataBlock->pDataBlock, 0);
   TSKEY* tsList = (TSKEY*)pTsColInfoData->pData;
+  if (IS_REPEAT_SCAN(pRuntimeEnv) && !pInfo->reptScan) {
+    pInfo->reptScan = true;
+    tfree(pInfo->prevData); 
+  }
 
   pInfo->numOfRows = 0;
   for (int32_t j = 0; j < pSDataBlock->info.rows; ++j) {
@@ -5761,6 +5770,7 @@ SOperatorInfo* createTimeIntervalOperatorInfo(SQueryRuntimeEnv* pRuntimeEnv, SOp
 SOperatorInfo* createStatewindowOperatorInfo(SQueryRuntimeEnv* pRuntimeEnv, SOperatorInfo* upstream, SExprInfo* pExpr, int32_t numOfOutput) {
   SStateWindowOperatorInfo* pInfo = calloc(1, sizeof(SStateWindowOperatorInfo));
   pInfo->colIndex   = -1;
+  pInfo->reptScan   = false;
   pInfo->binfo.pCtx = createSQLFunctionCtx(pRuntimeEnv, pExpr, numOfOutput, &pInfo->binfo.rowCellInfoOffset);
   pInfo->binfo.pRes = createOutputBuf(pExpr, numOfOutput, pRuntimeEnv->resultInfo.capacity);
   initResultRowInfo(&pInfo->binfo.resultRowInfo, 8, TSDB_DATA_TYPE_INT);
@@ -5788,7 +5798,8 @@ SOperatorInfo* createSWindowOperatorInfo(SQueryRuntimeEnv* pRuntimeEnv, SOperato
   pInfo->binfo.pRes = createOutputBuf(pExpr, numOfOutput, pRuntimeEnv->resultInfo.capacity);
   initResultRowInfo(&pInfo->binfo.resultRowInfo, 8, TSDB_DATA_TYPE_INT);
 
-  pInfo->prevTs = INT64_MIN;
+  pInfo->prevTs   = INT64_MIN;
+  pInfo->reptScan = false; 
   SOperatorInfo* pOperator = calloc(1, sizeof(SOperatorInfo));
 
   pOperator->name         = "SessionWindowAggOperator";