diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 536dd4299a..fb82ab206c 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -466,7 +466,7 @@ int32_t functionFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
   SColumnInfoData* pCol = taosArrayGet(pBlock->pDataBlock, slotId);
 
   SResultRowEntryInfo* pResInfo = GET_RES_INFO(pCtx);
-  pResInfo->isNullRes = (pResInfo->numOfRes == 0) ? 1 : 0;
+  pResInfo->isNullRes = (pResInfo->isNullRes == 1) ? 1 : (pResInfo->numOfRes == 0);
 
   char* in = GET_ROWCELL_INTERBUF(pResInfo);
   colDataAppend(pCol, pBlock->info.rows, in, pResInfo->isNullRes);
@@ -663,7 +663,8 @@ int32_t sumFunction(SqlFunctionCtx* pCtx) {
 
   // check for overflow
   if (IS_FLOAT_TYPE(type) && (isinf(pSumRes->dsum) || isnan(pSumRes->dsum))) {
-    numOfElem = 0;
+    GET_RES_INFO(pCtx)->isNullRes = 1;
+    numOfElem = 1;
   }
 
 _sum_over:
@@ -1605,7 +1606,7 @@ int32_t minmaxFunctionFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
   int32_t currentRow = pBlock->info.rows;
 
   SColumnInfoData* pCol = taosArrayGet(pBlock->pDataBlock, slotId);
-  pEntryInfo->isNullRes = (pEntryInfo->numOfRes == 0);
+  pEntryInfo->isNullRes = (pEntryInfo->isNullRes == 1) ? 1 : (pEntryInfo->numOfRes == 0);
 
   if (pCol->info.type == TSDB_DATA_TYPE_FLOAT) {
     float v = *(double*)&pRes->v;
diff --git a/tests/script/tsim/stream/session0.sim b/tests/script/tsim/stream/session0.sim
index 16a53d49f3..d05a9e1814 100644
--- a/tests/script/tsim/stream/session0.sim
+++ b/tests/script/tsim/stream/session0.sim
@@ -83,22 +83,22 @@ if $data11 != 3 then
   goto loop0
 endi
 
-if $data12 != 10 then
+if $data12 != NULL then
   print ======data12=$data12
   goto loop0
 endi
 
-if $data13 != 10 then
+if $data13 != NULL then
   print ======data13=$data13
   goto loop0
 endi
 
-if $data14 != 1.100000000 then
+if $data14 != NULL then
   print ======data14=$data14
   return -1
 endi
 
-if $data15 != 0.000000000 then
+if $data15 != NULL then
   print ======data15=$data15
   return -1
 endi
@@ -141,22 +141,22 @@ if $data01 != 7 then
   goto loop1
 endi
 
-if $data02 != 18 then
+if $data02 != NULL then
   print =====data02=$data02
   goto loop1
 endi
 
-if $data03 != 4 then
+if $data03 != NULL then
   print =====data03=$data03
   goto loop1
 endi
 
-if $data04 != 1.000000000 then
+if $data04 != NULL then
   print ======$data04
   return -1
 endi
 
-if $data05 != 1.154700538 then
+if $data05 != NULL then
   print ======$data05
   return -1
 endi