diff --git a/tests/system-test/2-query/TD-12165.py b/tests/system-test/2-query/TD-12165.py
deleted file mode 100644
index 672d070130ecc8db8172a8475b1e9ad518b649bb..0000000000000000000000000000000000000000
--- a/tests/system-test/2-query/TD-12165.py
+++ /dev/null
@@ -1,105 +0,0 @@
-###################################################################
-#           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 -*-
-
-from posixpath import split
-import sys
-import os 
-
-from util.log import *
-from util.cases import *
-from util.sql import *
-from util.dnodes import *
-import subprocess
-
-class TDTestCase:
-    def init(self, conn, logSql):
-        tdLog.debug("start to execute %s" % __file__)
-        tdSql.init(conn.cursor(), logSql)
-        
-        self.ts = 1420041600000 # 2015-01-01 00:00:00  this is begin time for first record
-        self.num = 10
-
-    def getBuildPath(self):
-        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("/build/bin")]
-                    break
-        return buildPath
-
-
-    def caseDescription(self):
-
-        '''
-        case1 <author>:wenzhouwww [TD-12165] : 
-            this test case is an test case for unexpectd use way for alias _c0 ,it should be regarded as keywords ;
-            
-        ''' 
-        return 
-   
-    def run(self):
-        tdSql.prepare()
-        tdSql.execute("create database if not exists testdb keep 36500;")
-        tdSql.execute("use testdb;")
-        tdSql.execute("create stable st (ts timestamp , id int , value double) tags(hostname binary(10) ,ind int);")
-        for i in range(self.num):
-            tdSql.execute("insert into tb%s using st tags('host_%s' , %d) values (%d , %d , %f );"%(str(i),str(i),i*10,self.ts+100*i,i*2,i+10.00))
-            tdSql.execute("insert into tb%s using st tags('host_%s' , %d) values (%d , %d , %f );"%(str(i),str(i),i*10,self.ts+200*i,i*2,i+10.00))
-            tdSql.execute("insert into tb%s using st tags('host_%s' , %d) values (%d , %d , %f );"%(str(i),str(i),i*10,self.ts+300*i,i*2,i+10.00))
-            tdSql.execute("insert into tb%s using st tags('host_%s' , %d) values (%d , %d , %f );"%(str(i),str(i),i*10,self.ts+10000*i,i*2,i+10.00))
-
-        # basic alis
-        tdSql.error('select value ,value as _c0 from st;')  
-        tdSql.error('select value _c0 from st;')
-        tdSql.error('select ind ,ind as _c0 from st;')  
-        tdSql.error('select ind _c0 from st;')
-        tdSql.error('select ts ,ts as _c0 from st;')  
-        tdSql.error('select ts _c0 from st;')
-        tdSql.error('select value ,value as _c0 from tb1;')  
-        tdSql.error('select value _c0 from tb2;')    
-        tdSql.error('select ts ,ts as _c0 from tb1;')  
-        tdSql.error('select ts _c0 from tb2;') 
-       
-        # nest query  alis name
-
-        tdSql.error('select ts , ts _c0 from (select ts ,value from st);')  
-        tdSql.error('select ts , ts as _c0 from (select ts ,value from tb1);')  
-        tdSql.error('select ts , ts _c0 from (select * from st);')  
-        tdSql.error('select ts , ts as _c0 from (select * from tb1);')  
-        tdSql.error('select ts , _c0 from (select max(value) _c0 from st);')  
-        tdSql.error('select ts , _c0 from (select max(value) _c0 from tb1);')
-        tdSql.query('select _c0,data from (select max(value) data from tb1);')  
-        tdSql.query('select _c0,data from (select max(value) data from st);')
-        tdSql.query('select _c0,data from (select ts ,max(value) data from st);')
-        tdSql.checkData(0,1,'19.0')
-        tdSql.query('select _c0,data from (select ts ,max(value) data from tb1);')
-        tdSql.checkData(0,1,'11.0')
-        tdSql.query('select _c0,data from (select csum(value) data from tb1);')
-        tdSql.checkData(0,1,'11.0')
-
-    def stop(self):
-        tdSql.close()
-        tdLog.success("%s successfully executed" % __file__)
-
-tdCases.addWindows(__file__, TDTestCase())
-tdCases.addLinux(__file__, TDTestCase())
-
-