fix the issue #233, failed to record slow query

src/client/src/tscProfile.c

@@ -56,10 +56,10 @@ void tscSaveSlowQueryFp(void *handle, void *tmrId) {
 
   static void *taos = NULL;
   if (taos == NULL) {
-    taos = taos_connect(NULL, "sys", tsInternalPass, NULL, 0);
+    taos = taos_connect(NULL, "monitor", tsInternalPass, NULL, 0);
     if (taos == NULL) {
       tscError("failed to save slow query, can't connect to server");
-      free(sql);
+      free(sql);
       return;
     }
   }

src/kit/taosdump/taosdump.c

@@ -464,13 +464,13 @@ int taosDumpOut(struct arguments *arguments) {
   TAOS_FIELD *fields = taos_fetch_fields(result);
 
   while ((row = taos_fetch_row(result)) != NULL) {
-    if (strncasecmp(row[TSDB_SHOW_DB_NAME_INDEX], "sys", fields[TSDB_SHOW_DB_NAME_INDEX].bytes) == 0 &&
+    if (strncasecmp(row[TSDB_SHOW_DB_NAME_INDEX], "monitor", fields[TSDB_SHOW_DB_NAME_INDEX].bytes) == 0 &&
         (!arguments->allow_sys))
       continue;
 
     if (arguments->databases) {
       for (int i = 0; arguments->arg_list[i]; i++) {
-        if (strncasecmp(arguments->arg_list[i], (char *)row[TSDB_SHOW_DB_NAME_INDEX],
+        if (strncasecmp(arguments->arg_list[i], (char *)row[TSDB_SHOW_DB_NAME_INDEX],
                         fields[TSDB_SHOW_DB_NAME_INDEX].bytes) == 0)
           goto _dump_db_point;
       }

src/system/src/mgmtShell.c

@@ -433,7 +433,7 @@ int mgmtProcessAlterUserMsg(char *pMsg, int msgLen, SConnObj *pConn) {
     return 0;
   }
 
-  if (strcmp(pUser->user, "sys") == 0 || strcmp(pUser->user, "stream") == 0) {
+  if (strcmp(pUser->user, "monitor") == 0 || strcmp(pUser->user, "stream") == 0) {
     code = TSDB_CODE_NO_RIGHTS;
   } else if ((strcmp(pUser->user, pConn->pUser->user) == 0) ||
              ((strcmp(pUser->acct, acctObj.user) == 0) && pConn->superAuth) ||
@@ -474,7 +474,7 @@ int mgmtProcessDropUserMsg(char *pMsg, int msgLen, SConnObj *pConn) {
 
   if (strcmp(pConn->pUser->user, pDrop->user) == 0) {
     code = TSDB_CODE_NO_RIGHTS;
-  } else if (strcmp(pDrop->user, "sys") == 0 || strcmp(pDrop->user, "stream") == 0) {
+  } else if (strcmp(pDrop->user, "monitor") == 0 || strcmp(pDrop->user, "stream") == 0) {
     code = TSDB_CODE_NO_RIGHTS;
   } else {
     if (pConn->superAuth) {