diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 6baf45a5b3..51ed461f04 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 e8011bf572..ae6eb9f456 100644
--- a/source/libs/scalar/src/sclfunc.c
+++ b/source/libs/scalar/src/sclfunc.c
@@ -172,11 +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;
       }
@@ -188,7 +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) {
@@ -207,7 +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) {