[TD-6081]<test> add test case for filter within multiple nchar tags

tests/pytest/query/filterWithinMultiNchar.py

+###################################################################
+#           Copyright (c) 2016 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 sys
+import taos
+from util.log import tdLog
+from util.cases import tdCases
+from util.sql import tdSql
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        tdSql.prepare()
+
+        print("==============step1")
+        tdSql.execute(
+            "create stable t6 (ts timestamp,val int,flow nchar(36)) tags(dev nchar(36),gr nchar(36))")
+        tdSql.execute("insert into t6004 using t6 (dev,gr) tags ('b50c79bc-b102-48e6-bda1-4212263e46d0','b50c79bc-b102-48e6-bda1-4212263e46d0') values(now,1,'b50c79bc-b102-48e6-bda1-4212263e46d0')")
+
+
+        print("==============step2")    
+        tdSql.query("select * from t6 where dev='b50c79bc-b102-48e6-bda1-4212263e46d0'")
+        tdSql.checkRows(1)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())