[TD-12340] <test> add case for TD-12340 and TD-12342

tests/system-test/2-query/0-aggregate/TD-12340-12342.py

+###################################################################
+#           Copyright (c) 2020 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import taos
+import time
+
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def __init__(self):
+        self.err_case = 0
+        self.curret_case = 0
+
+    def caseDescription(self):
+
+        '''
+        case1 <cpwu>: [TD-12340] : group by ts should  resturn two column ;\n
+        case2 <cpwu>: [TD-12342] : "group by ts order by first-tag" should return error
+        '''
+        return
+
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def create_stb(self):
+        basetime = int(round(time.time() * 1000))
+        tdSql.prepare()
+        tdSql.execute(f"create stable stb1(ts timestamp, c1 int) tags (tag1 int)")
+        for i in range(10):
+            tdSql.execute(f"create table t{i} using stb1 tags({i})")
+            tdSql.execute(f"insert into t{i} values ({basetime}, {i})")
+
+        pass
+
+    def check_td12340(self):
+        # this case expect return two column when using "group by ts"
+        tdSql.query("select count(*) from stb1 group by ts")
+        try:
+            tdSql.checkCols(2)
+            self.curret_case += 1
+            tdLog.printNoPrefix("the case1: td-12340 run passed")
+        except:
+            self.err_case += 1
+            tdLog.printNoPrefix("the case1: td-12340 run failed")
+        pass
+
+    def check_td12342(self):
+        # this case expect return err when using "group by ts order by first-tag"
+        try:
+            tdSql.error("select count(*) from stb1 group by ts order by tag1")
+            self.curret_case += 1
+            tdLog.printNoPrefix("the case2: td-12342 run passed")
+        except:
+            self.err_case += 1
+            tdLog.printNoPrefix("the case2: td-12342 run failed")
+        pass
+
+    def run(self):
+        self.create_stb()
+
+        self.check_td12340()
+        self.check_td12342()
+
+        if self.err_case > 0:
+            tdLog.exit(f"{self.err_case} is failed")
+        else:
+            tdLog.success("2 case is all passed")
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())