diff --git a/tests/pytest/dbmgmt/nanoSecondCheck.py b/tests/pytest/dbmgmt/nanoSecondCheck.py
new file mode 100644
index 0000000000..3cd8168b35
--- /dev/null
+++ b/tests/pytest/dbmgmt/nanoSecondCheck.py
@@ -0,0 +1,93 @@
+###################################################################
+#           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 -*-
+
+#TODO: after TD-4518 and TD-4510 is resolved, add the exception test case for these situations
+
+import sys
+from util.log import *
+from util.cases import *
+from util.sql import *
+import time
+from datetime import datetime
+import os
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        tdSql.prepare()
+
+        tdSql.execute('reset query cache')
+        tdSql.execute('drop database if exists db')
+        tdSql.execute('create database db precision "ns"')
+        tdSql.query('show databases')
+        tdSql.checkData(0,16,'ns')
+        tdSql.execute('use db')
+        tdSql.execute('create table tb (ts timestamp, speed int)')
+        tdSql.execute('insert into tb values(\'2021-06-10 0:00:00.100000001\', 1)')
+        tdSql.execute('insert into tb values(1623254400223456789, 1)')
+        os.system('sudo timedatectl set-ntp off')
+        os.system('sudo timedatectl set-time 2021-06-10')
+        tdSql.execute('insert into tb values(now + 500000000b, 1)')
+
+        ##TODO: after the connector is updated, run the following commented code
+        # tdSql.query('select count(*) from tb where ts > 1623254400000000000 and ts < 1623254400150000000')
+        # tdSql.checkData(0,0,1)
+        # tdSql.query('select count(*) from tb where ts > \'2021-06-10 0:00:00.000000000\' and ts < \'2021-06-10 0:00:00.150000000\'')
+        # tdSql.checkData(0,0,1)
+
+        # tdSql.query('select count(*) from tb where ts > 1623254400223456788 and ts < 1623254400223456790')
+        # tdSql.checkData(0,0,1)
+        # tdSql.query('select count(*) from tb where ts > \'2021-06-10 00:00:00.223456788\' and ts < \'2021-06-10 00:00:00.223456790\'')
+        # tdSql.checkData(0,0,1)
+
+        # tdSql.query('select count(*) from tb where ts > 1623254400400000000')
+        # tdSql.checkData(0,0,1)
+        # tdSql.query('select count(*) from tb where ts > \'2021-06-10 00:00:00.400000000\'')
+        # tdSql.checkData(0,0,1)
+
+        # os.system('sudo timedatectl set-ntp off')
+        # os.system('sudo timedatectl set-time 2021-06-10')
+        # tdSql.query('select count(*) from tb where ts > now')
+        # tdSql.checkData(0,0,3)
+        # os.system('sudo timedatectl set-ntp off')
+        # os.system('sudo timedatectl set-time 2021-06-10')
+        # tdSql.query('select count(*) from tb where ts > now + 300000000b')
+        # tdSql.checkData(0,0,1)
+
+        # tdSql.query('select count(*) from tb where ts >= \'2021-06-10 0:00:00.100000001\'')
+        # tdSql.checkData(0,0,3)
+
+        # tdSql.query('select count(*) from tb where ts <= \'2021-06-10 0:00:00.223456789\'')
+        # tdSql.checkData(0,0,2)
+
+        # tdSql.query('select count(*) from tb where ts = \'2021-06-10 0:00:00.000000000\'')
+        # tdSql.checkData(0,0,0)
+
+        # tdSql.query('select count(*) from tb where ts <> \'2021-06-10 0:00:00.223456789\'')
+        # tdSql.checkData(0,0,2)
+
+        # tdSql.query('select count(*) from tb where ts between 1623254400000000000 and 1623254400950000000')
+        # tdSql.checkData(0,0,2)
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
\ No newline at end of file