diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 640c160203bff6050e043ee2ea2488d674757a87..6fa7d10ca3e272b592e1992fdb90f92e6851bdec 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -1476,6 +1476,7 @@ static int32_t translateTimeTruncate(SFunctionNode* pFunc, char* pErrBuf, int32_
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
+  //add database precision as param
   uint8_t dbPrec = pFunc->node.resType.precision;
   addDbPrecisonParam(pFunc->pParameterList, dbPrec);
 
@@ -1503,6 +1504,10 @@ static int32_t translateTimeDiff(SFunctionNode* pFunc, char* pErrBuf, int32_t le
     }
   }
 
+  //add database precision as param
+  uint8_t dbPrec = pFunc->node.resType.precision;
+  addDbPrecisonParam(pFunc->pParameterList, dbPrec);
+
   pFunc->node.resType = (SDataType){.bytes = tDataTypes[TSDB_DATA_TYPE_BIGINT].bytes, .type = TSDB_DATA_TYPE_BIGINT};
   return TSDB_CODE_SUCCESS;
 }
diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 73767159683bd2adf73b3855b8188a18f3d24172..e40ab3784d415bedc6cc155e22edf063833162c0 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -5525,7 +5525,7 @@ int32_t groupKeyFunction(SqlFunctionCtx* pCtx) {
 
   int32_t startIndex = pInput->startRowIndex;
 
-  //escape rest of data blocks to avoid first entry be overwritten.
+  //escape rest of data blocks to avoid first entry to be overwritten.
   if (pInfo->hasResult) {
     goto _group_key_over;
   }
diff --git a/source/libs/scalar/src/sclfunc.c b/source/libs/scalar/src/sclfunc.c
index 57962abc01e0e79d1a00fb3a041147530d5c3e4f..b7c171db2ea320af3b558bf1792fa58718491260 100644
--- a/source/libs/scalar/src/sclfunc.c
+++ b/source/libs/scalar/src/sclfunc.c
@@ -1380,10 +1380,12 @@ int32_t timeTruncateFunction(SScalarParam *pInput, int32_t inputNum, SScalarPara
 }
 
 int32_t timeDiffFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
-  int32_t timePrec = GET_PARAM_PRECISON(&pInput[0]);
-  int64_t timeUnit = -1, timeVal[2] = {0};
-  if (inputNum == 3) {
+  int64_t timeUnit = -1, timePrec, timeVal[2] = {0};
+  if (inputNum == 4) {
     GET_TYPED_DATA(timeUnit, int64_t, GET_PARAM_TYPE(&pInput[2]), pInput[2].columnData->pData);
+    GET_TYPED_DATA(timePrec, int64_t, GET_PARAM_TYPE(&pInput[3]), pInput[3].columnData->pData);
+  } else {
+    GET_TYPED_DATA(timePrec, int64_t, GET_PARAM_TYPE(&pInput[2]), pInput[2].columnData->pData);
   }
 
   int32_t numOfRows = 0;