Merge pull request #899 from taosdata/hotfix-#898

Update tscUtil.c

src/client/src/tscSQLParser.c

@@ -5336,7 +5336,8 @@ static int32_t checkUpdateTagPrjFunctions(SSqlCmd* pCmd) {
 
   for (int32_t i = 0; i < pCmd->fieldsInfo.numOfOutputCols; ++i) {
     int16_t functionId = tscSqlExprGet(pCmd, i)->functionId;
-    if (functionId == TSDB_FUNC_TAGPRJ || functionId == TSDB_FUNC_PRJ || functionId == TSDB_FUNC_TS) {
+    if (functionId == TSDB_FUNC_TAGPRJ || functionId == TSDB_FUNC_PRJ || functionId == TSDB_FUNC_TS || 
+        functionId == TSDB_FUNC_ARITHM) {
       continue;
     }
 

src/client/src/tscUtil.c

@@ -236,7 +236,7 @@ bool tscProjectionQueryOnMetric(SSqlCmd* pCmd) {
     SSqlExpr* pExpr = tscSqlExprGet(pCmd, i);
     int32_t functionId = pExpr->functionId;
     if (functionId != TSDB_FUNC_PRJ && functionId != TSDB_FUNC_TAGPRJ &&
-        functionId != TSDB_FUNC_TAG && functionId != TSDB_FUNC_TS) {
+        functionId != TSDB_FUNC_TAG && functionId != TSDB_FUNC_TS && functionId != TSDB_FUNC_ARITHM) {
       return false;
     }
   }