diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index d9fdf305f378bd9d625d1855965ce44d8a38ab62..d712e04edf860ddef5b607bdced440ce3ec9def3 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -402,6 +402,7 @@ python3 ./test.py -f query/queryWildcardLength.py
 python3 ./test.py -f query/queryTbnameUpperLower.py
 python3 ./test.py -f query/queryGroupTbname.py
 python3 ./test.py -f insert/verifyMemToDiskCrash.py
+python3 ./test.py -f functions/variable_httpDbNameMandatory.py
 
 #======================p4-end===============
 
diff --git a/tests/pytest/functions/variable_httpDbNameMandatory.py b/tests/pytest/functions/variable_httpDbNameMandatory.py
new file mode 100644
index 0000000000000000000000000000000000000000..3be620ad1e1631126697d93e388df82be3e9d57c
--- /dev/null
+++ b/tests/pytest/functions/variable_httpDbNameMandatory.py
@@ -0,0 +1,146 @@
+###################################################################
+#           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 subprocess
+import random
+import math
+import numpy as np
+import inspect
+
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+from requests.auth import HTTPBasicAuth
+import requests
+import json
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug(f"start to execute {__file__}")
+        tdSql.init(conn.cursor(), logSql)
+
+    def getBuildPath(self) -> str:
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/debug/build/bin")]
+                    break
+        return buildPath
+
+    def getCfgDir(self) -> str:
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+
+        if ("community" in selfPath):
+            cfgDir = self.getBuildPath() + "/community/sim/dnode1/cfg"
+        else:
+            cfgDir = self.getBuildPath() + "/sim/dnode1/cfg"
+        return cfgDir
+
+    def getCfgFile(self) -> str:
+        return self.getCfgDir()+"/taos.cfg"
+
+    def rest_query(self,sql,db=''):                                       
+        host = '127.0.0.1'
+        user = 'root'
+        password = 'taosdata'
+        port =6041
+        if db == '':
+            url = "http://{}:{}/rest/sql".format(host, port )
+        else:
+            url = "http://{}:{}/rest/sql/{}".format(host, port, db )
+        try:
+            r = requests.post(url, 
+                data = 'use db' ,
+                auth = HTTPBasicAuth('root', 'taosdata'))  
+            r = requests.post(url, 
+                data = sql,
+                auth = HTTPBasicAuth('root', 'taosdata'))         
+        except:
+            print("REST API Failure (TODO: more info here)")
+            raise
+        rj = dict(r.json()['data'])
+        return rj
+    
+    def TS834(self):
+        tdLog.printNoPrefix("==========TS-782==========")
+        tdSql.prepare()
+
+        cfgfile = self.getCfgFile()
+
+        tdSql.execute("show variables")
+        res_com = tdSql.cursor.fetchall()
+        rescomlist = np.array(res_com)
+        cpms_index = np.where(rescomlist == "httpDbNameMandatory")
+        index_value = np.dstack((cpms_index[0])).squeeze()
+
+        tdSql.query("show variables")
+        tdSql.checkData(index_value, 1, 0)
+
+        rj = self.rest_query("show variables")
+        if 'httpDbNameMandatory' not in rj:
+            tdLog.info('has no httpDbNameMandatory shown')
+            tdLog.exit(1)
+        if rj['httpDbNameMandatory'] != '0':
+            tdLog.info('httpDbNameMandatory data:%s == expect:0'%rj['httpDbNameMandatory'])
+            tdLog.exit(1)
+        tdLog.info("httpDbNameMandatory by restful query data:%s == expect:0" % (rj['httpDbNameMandatory']))
+
+        tdSql.query("show dnodes")
+        index = tdSql.getData(0, 0)
+        tdLog.info("restart taosd ")
+        tdDnodes.stop(index)
+        cmd = f"echo 'httpDbNameMandatory 1' >> {cfgfile} "
+        try:
+            _ = subprocess.check_output(cmd, shell=True).decode("utf-8")
+        except Exception as e:
+            raise e
+
+        tdDnodes.start(index)
+        tdSql.query("show variables")
+        tdSql.checkData(index_value, 1, 1)
+
+        rj = self.rest_query("show variables", 'db')
+        if 'httpDbNameMandatory' not in rj:
+            tdLog.info('has no httpDbNameMandatory shown')
+            tdLog.exit(1)
+        if rj['httpDbNameMandatory'] != '1':
+            tdLog.info('httpDbNameMandatory data:%s == expect:0'%rj['httpDbNameMandatory'])
+            tdLog.exit(1)
+        tdLog.info("httpDbNameMandatory by restful query data:%s == expect:1" % (rj['httpDbNameMandatory']))
+
+    def run(self):
+        
+        #TS-834 https://jira.taosdata.com:18080/browse/TS-834
+        self.TS834()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
+
+
+