refactor(query): function adoption to us/ns db precision

TD-16436

source/libs/function/src/builtins.c

@@ -1460,6 +1460,10 @@ static int32_t translateToUnixtimestamp(SFunctionNode* pFunc, char* pErrBuf, int
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
+  //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;
 }

source/libs/scalar/src/sclfunc.c

@@ -1116,7 +1116,8 @@ int32_t toISO8601Function(SScalarParam *pInput, int32_t inputNum, SScalarParam *
 
 int32_t toUnixtimestampFunction(SScalarParam *pInput, int32_t inputNum, SScalarParam *pOutput) {
   int32_t type = GET_PARAM_TYPE(pInput);
-  int32_t timePrec = GET_PARAM_PRECISON(pInput);
+  int64_t timePrec;
+  GET_TYPED_DATA(timePrec, int64_t, GET_PARAM_TYPE(&pInput[1]), pInput[1].columnData->pData);
 
   for (int32_t i = 0; i < pInput[0].numOfRows; ++i) {
     if (colDataIsNull_s(pInput[0].columnData, i)) {