diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index f985cc324d809cd0937e2d886dfff55c1f29b2e3..69fff2ad1811077fcc15ddec52f3d47499c699b2 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -79,7 +79,8 @@ static int32_t translateIn2NumOutDou(SFunctionNode* pFunc, char* pErrBuf, int32_
 
   uint8_t para1Type = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 0))->resType.type;
   uint8_t para2Type = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 1))->resType.type;
-  if (!IS_NUMERIC_TYPE(para1Type) || !IS_NUMERIC_TYPE(para2Type)) {
+  if ((!IS_NUMERIC_TYPE(para1Type) && !IS_NULL_TYPE(para1Type)) ||
+      (!IS_NUMERIC_TYPE(para2Type) && !IS_NULL_TYPE(para2Type))) {
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
@@ -109,13 +110,13 @@ static int32_t translateLogarithm(SFunctionNode* pFunc, char* pErrBuf, int32_t l
   }
 
   uint8_t para1Type = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 0))->resType.type;
-  if (!IS_NUMERIC_TYPE(para1Type)) {
+  if (!IS_NUMERIC_TYPE(para1Type) && !IS_NULL_TYPE(para1Type)) {
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
   if (2 == numOfParams) {
     uint8_t para2Type = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 1))->resType.type;
-    if (!IS_NUMERIC_TYPE(para2Type)) {
+    if (!IS_NUMERIC_TYPE(para2Type) && !IS_NULL_TYPE(para2Type)) {
       return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
     }
   }
diff --git a/source/libs/scalar/src/sclfunc.c b/source/libs/scalar/src/sclfunc.c
index 7ea0457592824b7f26fe823f8f016fd98a90d4f7..d7f0733129b37144c4661fd612e6769d2a232397 100644
--- a/source/libs/scalar/src/sclfunc.c
+++ b/source/libs/scalar/src/sclfunc.c
@@ -36,9 +36,6 @@ int32_t absFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutpu
   SColumnInfoData *pOutputData = pOutput->columnData;
 
   int32_t type = GET_PARAM_TYPE(pInput);
-  if (!IS_NUMERIC_TYPE(type)) {
-    return TSDB_CODE_FAILED;
-  }
 
   switch (type) {
     case TSDB_DATA_TYPE_FLOAT: {
@@ -119,6 +116,13 @@ int32_t absFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutpu
       break;
     }
 
+    case TSDB_DATA_TYPE_NULL: {
+      for (int32_t i = 0; i < pInput->numOfRows; ++i) {
+        colDataAppendNULL(pOutputData, i);
+      }
+      break;
+    }
+
     default: {
       colDataAssign(pOutputData, pInputData, pInput->numOfRows, NULL);
     }
@@ -130,9 +134,6 @@ int32_t absFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutpu
 
 static int32_t doScalarFunctionUnique(SScalarParam *pInput, int32_t inputNum, SScalarParam* pOutput, _double_fn valFn) {
   int32_t type = GET_PARAM_TYPE(pInput);
-  if (inputNum != 1 || !IS_NUMERIC_TYPE(type)) {
-    return TSDB_CODE_FAILED;
-  }
 
   SColumnInfoData *pInputData = pInput->columnData;
   SColumnInfoData *pOutputData = pOutput->columnData;
@@ -142,7 +143,7 @@ static int32_t doScalarFunctionUnique(SScalarParam *pInput, int32_t inputNum, SS
   double *out = (double *)pOutputData->pData;
 
   for (int32_t i = 0; i < pInput->numOfRows; ++i) {
-    if (colDataIsNull_s(pInputData, i)) {
+    if (colDataIsNull_s(pInputData, i) || IS_NULL_TYPE(type)) {
       colDataAppendNULL(pOutputData, i);
       continue;
     }
@@ -159,10 +160,6 @@ static int32_t doScalarFunctionUnique(SScalarParam *pInput, int32_t inputNum, SS
 }
 
 static int32_t doScalarFunctionUnique2(SScalarParam *pInput, int32_t inputNum, SScalarParam* pOutput, _double_fn_2 valFn) {
-  if (inputNum != 2 || !IS_NUMERIC_TYPE(GET_PARAM_TYPE(&pInput[0])) || !IS_NUMERIC_TYPE(GET_PARAM_TYPE(&pInput[1]))) {
-    return TSDB_CODE_FAILED;
-  }
-
   SColumnInfoData *pInputData[2];
   SColumnInfoData *pOutputData = pOutput->columnData;
   _getDoubleValue_fn_t getValueFn[2];
@@ -175,11 +172,15 @@ static int32_t doScalarFunctionUnique2(SScalarParam *pInput, int32_t inputNum, S
   double *out = (double *)pOutputData->pData;
   double result;
 
+  bool hasNullType = (IS_NULL_TYPE(GET_PARAM_TYPE(&pInput[0])) ||
+                      IS_NULL_TYPE(GET_PARAM_TYPE(&pInput[1])));
+
   int32_t numOfRows = TMAX(pInput[0].numOfRows, pInput[1].numOfRows);
   if (pInput[0].numOfRows == pInput[1].numOfRows) {
     for (int32_t i = 0; i < numOfRows; ++i) {
       if (colDataIsNull_s(pInputData[0], i) ||
-          colDataIsNull_s(pInputData[1], i)) {
+          colDataIsNull_s(pInputData[1], i) ||
+          hasNullType) {
         colDataAppendNULL(pOutputData, i);
         continue;
       }
@@ -191,7 +192,7 @@ static int32_t doScalarFunctionUnique2(SScalarParam *pInput, int32_t inputNum, S
       }
     }
   } else if (pInput[0].numOfRows == 1) { //left operand is constant
-    if (colDataIsNull_s(pInputData[0], 0)) {
+    if (colDataIsNull_s(pInputData[0], 0) || hasNullType) {
       colDataAppendNNULL(pOutputData, 0, pInput[1].numOfRows);
     } else {
       for (int32_t i = 0; i < numOfRows; ++i) {
@@ -210,7 +211,7 @@ static int32_t doScalarFunctionUnique2(SScalarParam *pInput, int32_t inputNum, S
       }
     }
   } else if (pInput[1].numOfRows == 1) {
-    if (colDataIsNull_s(pInputData[1], 0)) {
+    if (colDataIsNull_s(pInputData[1], 0) || hasNullType) {
       colDataAppendNNULL(pOutputData, 0, pInput[0].numOfRows);
     } else {
       for (int32_t i = 0; i < numOfRows; ++i) {
@@ -236,9 +237,6 @@ static int32_t doScalarFunctionUnique2(SScalarParam *pInput, int32_t inputNum, S
 
 static int32_t doScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam* pOutput, _float_fn f1, _double_fn d1) {
   int32_t type = GET_PARAM_TYPE(pInput);
-  if (inputNum != 1 || !IS_NUMERIC_TYPE(type)) {
-    return TSDB_CODE_FAILED;
-  }
 
   SColumnInfoData *pInputData  = pInput->columnData;
   SColumnInfoData *pOutputData = pOutput->columnData;
@@ -272,6 +270,13 @@ static int32_t doScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarP
       break;
     }
 
+    case TSDB_DATA_TYPE_NULL: {
+      for (int32_t i = 0; i < pInput->numOfRows; ++i) {
+        colDataAppendNULL(pOutputData, i);
+      }
+      break;
+    }
+
     default: {
       colDataAssign(pOutputData, pInputData, pInput->numOfRows, NULL);
     }