diff --git a/source/dnode/vnode/inc/vnode.h b/source/dnode/vnode/inc/vnode.h
index cb83a561d24aed55c4fde3f824139d8d4dbd26e6..5a7bebebff6a85c2468d9eaa5187015211235d3e 100644
--- a/source/dnode/vnode/inc/vnode.h
+++ b/source/dnode/vnode/inc/vnode.h
@@ -184,7 +184,7 @@ int32_t      tsdbReaderOpen(SVnode *pVnode, SQueryTableDataCond *pCond, void *pT
                             SSDataBlock *pResBlock, STsdbReader **ppReader, const char *idstr, bool countOnly, SHashObj** pIgnoreTables);
 void         tsdbReaderClose(STsdbReader *pReader);
 int32_t      tsdbNextDataBlock(STsdbReader *pReader, bool *hasNext);
-int32_t      tsdbRetrieveDatablockSMA(STsdbReader *pReader, SSDataBlock *pDataBlock, bool *allHave);
+int32_t      tsdbRetrieveDatablockSMA(STsdbReader *pReader, SSDataBlock *pDataBlock, bool *allHave, bool *hasNullSMA);
 void         tsdbReleaseDataBlock(STsdbReader *pReader);
 SSDataBlock *tsdbRetrieveDataBlock(STsdbReader *pTsdbReadHandle, SArray *pColumnIdList);
 int32_t      tsdbReaderReset(STsdbReader *pReader, SQueryTableDataCond *pCond);
diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index 4acc784aee7dfba25edf578c92a2acafd724e2ff..5d970ce6c3b30cb55770253856398dcda1ec1e51 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -4973,7 +4973,8 @@ int32_t tsdbNextDataBlock(STsdbReader* pReader, bool* hasNext) {
   return code;
 }
 
-static void doFillNullColSMA(SBlockLoadSuppInfo* pSup, int32_t numOfRows, int32_t numOfCols, SColumnDataAgg* pTsAgg) {
+static bool doFillNullColSMA(SBlockLoadSuppInfo* pSup, int32_t numOfRows, int32_t numOfCols, SColumnDataAgg* pTsAgg) {
+  bool hasNullSMA = false;
   // do fill all null column value SMA info
   int32_t i = 0, j = 0;
   int32_t size = (int32_t)taosArrayGetSize(pSup->pColAgg);
@@ -4993,6 +4994,7 @@ static void doFillNullColSMA(SBlockLoadSuppInfo* pSup, int32_t numOfRows, int32_
         taosArrayInsert(pSup->pColAgg, i, &nullColAgg);
         i += 1;
         size++;
+        hasNullSMA = true;
       }
       j += 1;
     }
@@ -5003,12 +5005,15 @@ static void doFillNullColSMA(SBlockLoadSuppInfo* pSup, int32_t numOfRows, int32_
       SColumnDataAgg nullColAgg = {.colId = pSup->colId[j], .numOfNull = numOfRows};
       taosArrayInsert(pSup->pColAgg, i, &nullColAgg);
       i += 1;
+      hasNullSMA = true;
     }
     j++;
   }
+
+  return hasNullSMA;
 }
 
-int32_t tsdbRetrieveDatablockSMA(STsdbReader* pReader, SSDataBlock* pDataBlock, bool* allHave) {
+int32_t tsdbRetrieveDatablockSMA(STsdbReader* pReader, SSDataBlock* pDataBlock, bool* allHave, bool *hasNullSMA) {
   SColumnDataAgg*** pBlockSMA = &pDataBlock->pBlockAgg;
 
   int32_t code = 0;
@@ -5072,7 +5077,10 @@ int32_t tsdbRetrieveDatablockSMA(STsdbReader* pReader, SSDataBlock* pDataBlock,
   }
 
   // do fill all null column value SMA info
-  doFillNullColSMA(pSup, pBlock->nRow, numOfCols, pTsAgg);
+  if (doFillNullColSMA(pSup, pBlock->nRow, numOfCols, pTsAgg)) {
+    *hasNullSMA = true;
+    return TSDB_CODE_SUCCESS;
+  }
   size_t size = taosArrayGetSize(pSup->pColAgg);
 
   int32_t i = 0, j = 0;
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index a001d99408a82d8e180d778409397658d0fbc8a0..c1430c4ce0ac541eef8ddc38a1a29106537ee2d9 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -228,12 +228,13 @@ static bool doFilterByBlockSMA(SFilterInfo* pFilterInfo, SColumnDataAgg** pColsA
 
 static bool doLoadBlockSMA(STableScanBase* pTableScanInfo, SSDataBlock* pBlock, SExecTaskInfo* pTaskInfo) {
   bool    allColumnsHaveAgg = true;
-  int32_t code = tsdbRetrieveDatablockSMA(pTableScanInfo->dataReader, pBlock, &allColumnsHaveAgg);
+  bool    hasNullSMA = false;
+  int32_t code = tsdbRetrieveDatablockSMA(pTableScanInfo->dataReader, pBlock, &allColumnsHaveAgg, &hasNullSMA);
   if (code != TSDB_CODE_SUCCESS) {
     T_LONG_JMP(pTaskInfo->env, code);
   }
 
-  if (!allColumnsHaveAgg) {
+  if (!allColumnsHaveAgg || hasNullSMA) {
     return false;
   }
   return true;
diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 4c019b3e710961065e0f4439f2f4f4baeb9de990..cdecc8b8ccdc13eb8a2eea4f161989e2effa1ebc 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -500,7 +500,7 @@ static int64_t getNumOfElems(SqlFunctionCtx* pCtx) {
    */
   SInputColumnInfoData* pInput = &pCtx->input;
   SColumnInfoData*      pInputCol = pInput->pData[0];
-  if (pInput->colDataSMAIsSet && pInput->totalRows == pInput->numOfRows && !IS_VAR_DATA_TYPE(pInputCol->info.type)) {
+  if (pInput->colDataSMAIsSet && pInput->totalRows == pInput->numOfRows) {
     numOfElem = pInput->numOfRows - pInput->pColumnDataAgg[0]->numOfNull;
   } else {
     if (pInputCol->hasNull) {