diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 20de7f73bf6baa993885469f85838c6f46386482..a9145ac69df04fdb692f78e78535aeda0df9a101 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -423,6 +423,8 @@ typedef struct SGroupKeyInfo {
     (_p).val = (_v);                \
   } while (0)
 
+static int32_t firstLastTransferInfoImpl(SFirstLastRes* pInput, SFirstLastRes* pOutput, bool isFirst);
+
 bool functionSetup(SqlFunctionCtx* pCtx, SResultRowEntryInfo* pResultInfo) {
   if (pResultInfo->initialized) {
     return false;
@@ -457,11 +459,12 @@ int32_t firstCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx) {
   SResultRowEntryInfo* pSResInfo = GET_RES_INFO(pSourceCtx);
   SFirstLastRes*       pSBuf = GET_ROWCELL_INTERBUF(pSResInfo);
 
-  if (pSResInfo->numOfRes != 0 && (pDResInfo->numOfRes == 0 || pDBuf->ts > pSBuf->ts)) {
-    memcpy(pDBuf->buf, pSBuf->buf, bytes);
-    pDBuf->ts = pSBuf->ts;
-    pDResInfo->numOfRes = 1;
+  if (TSDB_CODE_SUCCESS == firstLastTransferInfoImpl(pSBuf, pDBuf, true)) {
+    pDBuf->hasResult = true;
   }
+
+  pDResInfo->numOfRes = TMAX(pDResInfo->numOfRes, pSResInfo->numOfRes);
+  pDResInfo->isNullRes &= pSResInfo->isNullRes;
   return TSDB_CODE_SUCCESS;
 }
 
@@ -1274,17 +1277,8 @@ int32_t stddevCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx) {
   SStddevRes*          pSBuf = GET_ROWCELL_INTERBUF(pSResInfo);
   int16_t              type = pDBuf->type == TSDB_DATA_TYPE_NULL ? pSBuf->type : pDBuf->type;
 
-  if (IS_SIGNED_NUMERIC_TYPE(type)) {
-    pDBuf->isum += pSBuf->isum;
-    pDBuf->quadraticISum += pSBuf->quadraticISum;
-  } else if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
-    pDBuf->usum += pSBuf->usum;
-    pDBuf->quadraticUSum += pSBuf->quadraticUSum;
-  } else {
-    pDBuf->dsum += pSBuf->dsum;
-    pDBuf->quadraticDSum += pSBuf->quadraticDSum;
-  }
-  pDBuf->count += pSBuf->count;
+  stddevTransferInfo(pSBuf, pDBuf);
+
   pDResInfo->numOfRes = TMAX(pDResInfo->numOfRes, pSResInfo->numOfRes);
   pDResInfo->isNullRes &= pSResInfo->isNullRes;
   return TSDB_CODE_SUCCESS;
@@ -2289,16 +2283,15 @@ int32_t lastFunction(SqlFunctionCtx* pCtx) {
   return TSDB_CODE_SUCCESS;
 }
 
-static void firstLastTransferInfo(SqlFunctionCtx* pCtx, SFirstLastRes* pInput, SFirstLastRes* pOutput, bool isFirst,
-                                  int32_t rowIndex) {
+static int32_t firstLastTransferInfoImpl(SFirstLastRes* pInput, SFirstLastRes* pOutput, bool isFirst) {
   if (pOutput->hasResult) {
     if (isFirst) {
       if (pInput->ts > pOutput->ts) {
-        return;
+        return TSDB_CODE_FAILED;
       }
     } else {
       if (pInput->ts < pOutput->ts) {
-        return;
+        return TSDB_CODE_FAILED;
       }
     }
   }
@@ -2308,9 +2301,15 @@ static void firstLastTransferInfo(SqlFunctionCtx* pCtx, SFirstLastRes* pInput, S
   pOutput->bytes = pInput->bytes;
 
   memcpy(pOutput->buf, pInput->buf, pOutput->bytes);
-  firstlastSaveTupleData(pCtx->pSrcBlock, rowIndex, pCtx, pOutput);
+  return TSDB_CODE_SUCCESS;
+}
 
-  pOutput->hasResult = true;
+static void firstLastTransferInfo(SqlFunctionCtx* pCtx, SFirstLastRes* pInput, SFirstLastRes* pOutput, bool isFirst,
+                                  int32_t rowIndex) {
+  if (TSDB_CODE_SUCCESS == firstLastTransferInfoImpl(pInput, pOutput, isFirst)) {
+    firstlastSaveTupleData(pCtx->pSrcBlock, rowIndex, pCtx, pOutput);
+    pOutput->hasResult = true;
+  }
 }
 
 static int32_t firstLastFunctionMergeImpl(SqlFunctionCtx* pCtx, bool isFirstQuery) {
@@ -2378,7 +2377,6 @@ int32_t firstLastPartialFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
   return 1;
 }
 
-// todo rewrite:
 int32_t lastCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx) {
   SResultRowEntryInfo* pDResInfo = GET_RES_INFO(pDestCtx);
   SFirstLastRes*       pDBuf = GET_ROWCELL_INTERBUF(pDResInfo);
@@ -2387,11 +2385,12 @@ int32_t lastCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx) {
   SResultRowEntryInfo* pSResInfo = GET_RES_INFO(pSourceCtx);
   SFirstLastRes*       pSBuf = GET_ROWCELL_INTERBUF(pSResInfo);
 
-  if (pSResInfo->numOfRes != 0 && (pDResInfo->numOfRes == 0 || pDBuf->ts < pSBuf->ts)) {
-    memcpy(pDBuf->buf, pSBuf->buf, bytes);
-    pDBuf->ts = pSBuf->ts;
-    pDResInfo->numOfRes = 1;
+  if (TSDB_CODE_SUCCESS == firstLastTransferInfoImpl(pSBuf, pDBuf, false)) {
+    pDBuf->hasResult = true;
   }
+
+  pDResInfo->numOfRes = TMAX(pDResInfo->numOfRes, pSResInfo->numOfRes);
+  pDResInfo->isNullRes &= pSResInfo->isNullRes;
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/tests/script/tsim/stream/session1.sim b/tests/script/tsim/stream/session1.sim
index ee6eefde2633f6422dc51927421ef109392dc2ae..f535fd619fbedfa87598569ba7edfde82bd18086 100644
--- a/tests/script/tsim/stream/session1.sim
+++ b/tests/script/tsim/stream/session1.sim
@@ -197,4 +197,98 @@ if $data01 != 1 then
   return -1
 endi
 
+sql create database test1  vgroups 1;
+sql use test1;
+sql create table t1(ts timestamp, a int, b int , c int, d double);
+sql create stream streams3 trigger at_once  into streamt3 as select  _wstart, count(*) c1 from t1 where a > 5 session(ts, 5s);
+sql insert into t1 values(1648791213000,1,2,3,1.0);
+
+$loop_count = 0
+loop13:
+sleep 200
+
+sql select * from streamt3;
+
+$loop_count = $loop_count + 1
+if $loop_count == 10 then
+  return -1
+endi
+
+# row 0
+if $rows != 0 then
+  print =====rows=$rows
+  goto loop13
+endi
+
+sql insert into t1 values(1648791213000,6,2,3,1.0);
+
+$loop_count = 0
+loop14:
+sleep 200
+sql select * from streamt3;
+
+$loop_count = $loop_count + 1
+if $loop_count == 10 then
+  return -1
+endi
+
+if $data01 != 1 then
+  print =====data01=$data01
+  goto loop14
+endi
+
+sql insert into t1 values(1648791213000,2,2,3,1.0);
+
+$loop_count = 0
+loop15:
+sleep 200
+sql select * from streamt3;
+
+$loop_count = $loop_count + 1
+if $loop_count == 10 then
+  return -1
+endi
+
+if $rows != 0 then
+  print =====rows=$rows
+  goto loop15
+endi
+
+
+sql insert into t1 values(1648791223000,2,2,3,1.0);
+sql insert into t1 values(1648791223000,10,2,3,1.0);
+sql insert into t1 values(1648791233000,10,2,3,1.0);
+
+$loop_count = 0
+loop16:
+sleep 200
+sql select * from streamt3;
+
+$loop_count = $loop_count + 1
+if $loop_count == 10 then
+  return -1
+endi
+
+if $rows != 2 then
+  print =====rows=$rows
+  goto loop16
+endi
+
+sql insert into t1 values(1648791233000,2,2,3,1.0);
+
+$loop_count = 0
+loop17:
+sleep 200
+sql select * from streamt3;
+
+$loop_count = $loop_count + 1
+if $loop_count == 10 then
+  return -1
+endi
+
+if $rows != 1 then
+  print =====rows=$rows
+  goto loop17
+endi
+
 system sh/exec.sh -n dnode1 -s stop -x SIGINT