diff --git a/tests/system-test/2-query/json_tag_large_tables.py b/tests/system-test/2-query/json_tag_large_tables.py
new file mode 100644
index 0000000000..fc41858580
--- /dev/null
+++ b/tests/system-test/2-query/json_tag_large_tables.py
@@ -0,0 +1,672 @@
+###################################################################
+#           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, db_test.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 imp
+import sys
+import taos
+from util.log import tdLog
+from util.cases import tdCases
+from util.sql import tdSql
+import json
+import os
+
+
+class TDTestCase:
+    def caseDescription(self):
+        '''
+        Json tag test case, include create table with json tag, select json tag and query with json tag in where condition, besides, include json tag in group by/order by/join/subquery.
+        case1: [TD-12452] fix error if json tag is NULL
+        case2: [TD-12389] describe child table, tag length error if the tag is json tag
+        '''
+        return
+
+    def init(self, conn, logSql):
+        self.testcasePath = os.path.split(__file__)[0]
+        self.testcaseFilename = os.path.split(__file__)[-1]
+        # os.system("rm -rf %s/%s.sql" % (self.testcasePath,self.testcaseFilename))
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), True)
+
+    def run(self):
+        # tdSql.prepare()
+        tdSql.execute('drop database if exists db')
+        tdSql.execute('create database db vgroups 1')
+        tdSql.execute('use db')
+        print("============== STEP 1 ===== prepare data & validate json string")
+        i = 0
+        tdSql.execute("create table if not exists jsons1(ts timestamp, dataInt int, dataBool bool, dataStr nchar(50), dataStrBin binary(150)) tags(jtag json)")
+        while i <= 100000:
+            f = "insert into jsons1_{} using jsons1 tags('{\"tag1\":\"fff\",\"tag2\":{}, \"tag3\":true}') values(1591060618000, 1, false, 'json1', '你是') (1591060608000, 23, true, '等等', 'json')".format
+            sql = f(i, i) 
+            tdSql.execute(sql)
+            i = i + 1
+
+        # test duplicate key using the first one. elimate empty key
+        #tdSql.execute("CREATE TABLE if not exists jsons1_8 using jsons1 tags('{\"tag1\":null, \"tag1\":true, \"tag1\":45, \"1tag$\":2, \" \":90, \"\":32}')") tdSql.query("select jtag from jsons1_8") tdSql.checkRows(0); 
+        #tdSql.query("select ts,jtag from jsons1 order by ts limit 2,3")
+        #tdSql.checkData(0, 0, '2020-06-02 09:17:08.000')
+        #tdSql.checkData(0, 1, '{"tag1":5,"tag2":"beijing"}')
+        #tdSql.checkData(1, 0, '2020-06-02 09:17:48.000')
+        #tdSql.checkData(1, 1, '{"tag1":false,"tag2":"beijing"}')
+        #tdSql.checkData(2, 0, '2020-06-02 09:18:48.000')
+        #tdSql.checkData(2, 1, '{"tag1":null,"tag2":"shanghai","tag3":"hello"}')
+
+        #tdSql.query("select ts,jtag->'tag1' from jsons1 order by ts limit 2,3")
+        #tdSql.checkData(0, 0, '2020-06-02 09:17:08.000')
+        #tdSql.checkData(0, 1, '5.000000000')
+        #tdSql.checkData(1, 0, '2020-06-02 09:17:48.000')
+        #tdSql.checkData(1, 1, 'false')
+        #tdSql.checkData(2, 0, '2020-06-02 09:18:48.000')
+        #tdSql.checkData(2, 1, 'null')
+
+        ## test empty json string, save as jtag is NULL
+        #tdSql.execute("insert into jsons1_9  using jsons1 tags('\t') values (1591062328000, 24, NULL, '你就会', '2sdw')")
+        #tdSql.execute("CREATE TABLE if not exists jsons1_10 using jsons1 tags('')")
+        #tdSql.execute("CREATE TABLE if not exists jsons1_11 using jsons1 tags(' ')")
+        #tdSql.execute("CREATE TABLE if not exists jsons1_12 using jsons1 tags('{}')")
+        #tdSql.execute("CREATE TABLE if not exists jsons1_13 using jsons1 tags('null')")
+
+        ## test invalidate json
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('\"efwewf\"')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('3333')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags(76)")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags(hell)")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('33.33')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('false')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('[1,true]')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('{222}')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('{\"fe\"}')")
+
+        ## test invalidate json key, key must can be printed assic char
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('{\"tag1\":[1,true]}')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('{\"tag1\":{}}')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('{\"。loc\":\"fff\"}')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('{\"\t\":\"fff\"}')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('{\"试试\":\"fff\"}')")
+
+        ## test invalidate json value, value number can not be inf,nan TD-12166
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('{\"k\":1.8e308}')")
+        #tdSql.error("CREATE TABLE if not exists jsons1_14 using jsons1 tags('{\"k\":-1.8e308}')")
+
+        ##test length limit
+        #char1= ''.join(['abcd']*64)
+        #char3= ''.join(['abcd']*1021)
+        #print(len(char3))   # 4084
+        #tdSql.error("CREATE TABLE if not exists  jsons1_15 using  jsons1 tags('{\"%s1\":5}')" % char1)   # len(key)=257
+        #tdSql.execute("CREATE TABLE if not exists  jsons1_15 using  jsons1 tags('{\"%s\":5}')" % char1)  # len(key)=256
+        #tdSql.error("CREATE TABLE if not exists  jsons1_16 using  jsons1 tags('{\"TSSSS\":\"%s\"}')" % char3)   # len(object)=4096
+        #tdSql.execute("CREATE TABLE if not exists  jsons1_16 using  jsons1 tags('{\"TSSS\":\"%s\"}')" % char3)  # len(object)=4095
+        #tdSql.execute("drop table if exists jsons1_15")
+        #tdSql.execute("drop table if exists jsons1_16")
+
+        #print("============== STEP 2 ===== alter table json tag")
+        #tdSql.error("ALTER STABLE jsons1 add tag tag2 nchar(20)")
+        #tdSql.error("ALTER STABLE jsons1 drop tag jtag")
+        #tdSql.error("ALTER TABLE jsons1 MODIFY TAG jtag nchar(128)")
+
+        #tdSql.execute("ALTER TABLE jsons1_1 SET TAG jtag='{\"tag1\":\"femail\",\"tag2\":35,\"tag3\":true}'")
+        #tdSql.query("select jtag from jsons1_1")
+        #tdSql.checkData(0, 0, '{"tag1":"femail","tag2":35,"tag3":true}')
+        #tdSql.execute("ALTER TABLE jsons1 rename TAG jtag jtag_new")
+        #tdSql.execute("ALTER TABLE jsons1 rename TAG jtag_new jtag")
+
+        #tdSql.execute("create table st(ts timestamp, i int) tags(t int)")
+        #tdSql.error("ALTER STABLE st add tag jtag json")
+        #tdSql.error("ALTER STABLE st add column jtag json")
+
+        #print("============== STEP 3 ===== query table")
+        ## test error syntax
+        #tdSql.error("select * from jsons1 where jtag->tag1='beijing'")
+        #tdSql.error("select -> from jsons1")
+        #tdSql.error("select * from jsons1 where contains")
+        #tdSql.error("select * from jsons1 where jtag->")
+        #tdSql.error("select jtag->location from jsons1")
+        #tdSql.error("select jtag contains location from jsons1")
+        #tdSql.error("select * from jsons1 where jtag contains location")
+        #tdSql.query("select * from jsons1 where jtag contains''")
+        #tdSql.error("select * from jsons1 where jtag contains 'location'='beijing'")
+
+        ## test function error
+        #tdSql.error("select avg(jtag->'tag1') from jsons1")
+        #tdSql.error("select avg(jtag) from jsons1")
+        #tdSql.error("select min(jtag->'tag1') from jsons1")
+        #tdSql.error("select min(jtag) from jsons1")
+        #tdSql.error("select ceil(jtag->'tag1') from jsons1")
+        #tdSql.error("select ceil(jtag) from jsons1")
+
+
+        ##test scalar operation
+        #tdSql.query("select jtag contains 'tag1',jtag->'tag1' from jsons1 order by jtag->'tag1'")
+        #tdSql.checkRows(9)
+        #tdSql.query("select jtag->'tag1' like 'fe%',jtag->'tag1' from jsons1 order by jtag->'tag1'")
+        #tdSql.checkRows(9)
+        #tdSql.query("select jtag->'tag1' not like 'fe%',jtag->'tag1' from jsons1 order by jtag->'tag1'")
+        #tdSql.checkRows(9)
+        #tdSql.query("select jtag->'tag1' match 'fe',jtag->'tag1' from jsons1 order by jtag->'tag1'")
+        #tdSql.checkRows(9)
+        #tdSql.query("select jtag->'tag1' nmatch 'fe',jtag->'tag1' from jsons1 order by jtag->'tag1'")
+        #tdSql.checkRows(9)
+        #tdSql.query("select jtag->'tag1',jtag->'tag1'>='a' from jsons1 order by jtag->'tag1'")
+        #tdSql.checkRows(9)
+
+        ## test select normal column
+        #tdSql.query("select dataint from jsons1 order by dataint")
+        #tdSql.checkRows(9)
+        #tdSql.checkData(1, 0, 1)
+
+        ## test select json tag
+        #tdSql.query("select * from jsons1")
+        #tdSql.checkRows(9)
+        #tdSql.query("select jtag from jsons1")
+        #tdSql.checkRows(9)
+        #tdSql.query("select * from jsons1 where jtag is null")
+        #tdSql.checkRows(1)
+        #tdSql.query("select * from jsons1 where jtag is not null")
+        #tdSql.checkRows(8)
+
+        ## test jtag is NULL
+        #tdSql.query("select jtag from jsons1_9")
+        #tdSql.checkData(0, 0, None)
+
+        ## test select json tag->'key', value is string
+        #tdSql.query("select jtag->'tag1' from jsons1_1")
+        #tdSql.checkData(0, 0, '"femail"')
+        #tdSql.query("select jtag->'tag2' from jsons1_6")
+        #tdSql.checkData(0, 0, '""')
+        ## test select json tag->'key', value is int
+        #tdSql.query("select jtag->'tag2' from jsons1_1")
+        #tdSql.checkData(0, 0, "35.000000000")
+        ## test select json tag->'key', value is bool
+        #tdSql.query("select jtag->'tag3' from jsons1_1")
+        #tdSql.checkData(0, 0, "true")
+        ## test select json tag->'key', value is null
+        #tdSql.query("select jtag->'tag1' from jsons1_4")
+        #tdSql.checkData(0, 0, None)
+        ## test select json tag->'key', value is double
+        #tdSql.query("select jtag->'tag1' from jsons1_5")
+        #tdSql.checkData(0, 0, "1.232000000")
+        ## test select json tag->'key', key is not exist
+        #tdSql.query("select jtag->'tag10' from jsons1_4")
+        #tdSql.checkData(0, 0, None)
+
+        #tdSql.query("select jtag->'tag1' from jsons1")
+        #tdSql.checkRows(9)
+        ## test header name
+        #res = tdSql.getColNameList("select jtag->'tag1' from jsons1")
+        #cname_list = []
+        #cname_list.append("jtag->'tag1'")
+        #tdSql.checkColNameList(res, cname_list)
+
+
+        ## test where with json tag
+        #tdSql.query("select * from jsons1_1 where jtag is not null")
+        #tdSql.query("select * from jsons1 where jtag='{\"tag1\":11,\"tag2\":\"\"}'")
+        #tdSql.error("select * from jsons1 where jtag->'tag1'={}")
+
+        ## test json error
+        #tdSql.error("select jtag + 1 from jsons1")
+        #tdSql.error("select jtag > 1 from jsons1")
+        #tdSql.error("select jtag like \"1\" from jsons1")
+        #tdSql.error("select jtag in  (\"1\") from jsons1")
+        ##tdSql.error("select jtag from jsons1 where jtag > 1")
+        ##tdSql.error("select jtag from jsons1 where jtag like 'fsss'")
+        ##tdSql.error("select jtag from jsons1 where jtag in (1)")
+
+
+        ## where json value is string
+        #tdSql.query("select * from jsons1 where jtag->'tag2'='beijing'")
+        #tdSql.checkRows(2)
+        #tdSql.query("select dataint,tbname,jtag->'tag1',jtag from jsons1 where jtag->'tag2'='beijing' order by dataint")
+        #tdSql.checkRows(2)
+        #tdSql.checkData(0, 0, 2)
+        #tdSql.checkData(0, 1, 'jsons1_2')
+        #tdSql.checkData(0, 2, "5.000000000")
+        #tdSql.checkData(0, 3, '{"tag1":5,"tag2":"beijing"}')
+        #tdSql.checkData(1, 0, 3)
+        #tdSql.checkData(1, 1, 'jsons1_3')
+        #tdSql.checkData(1, 2, 'false')
+
+
+        #tdSql.query("select * from jsons1 where jtag->'tag1'='beijing'")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'='收到货'")
+        #tdSql.checkRows(1)
+        #tdSql.query("select * from jsons1 where jtag->'tag2'>'beijing'")
+        #tdSql.checkRows(1)
+        #tdSql.query("select * from jsons1 where jtag->'tag2'>='beijing'")
+        #tdSql.checkRows(3)
+        #tdSql.query("select * from jsons1 where jtag->'tag2'<'beijing'")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag2'<='beijing'")
+        #tdSql.checkRows(4)
+        #tdSql.query("select * from jsons1 where jtag->'tag2'!='beijing'")
+        #tdSql.checkRows(3)
+        #tdSql.query("select * from jsons1 where jtag->'tag2'=''")
+        #tdSql.checkRows(2)
+
+        ## where json value is int
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=5")
+        #tdSql.checkRows(1)
+        #tdSql.checkData(0, 1, 2)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=10")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'<54")
+        #tdSql.checkRows(3)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'<=11")
+        #tdSql.checkRows(3)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'>4")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'>=5")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'!=5")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'!=55")
+        #tdSql.checkRows(3)
+
+        ## where json value is double
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=1.232")
+        #tdSql.checkRows(1)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'<1.232")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'<=1.232")
+        #tdSql.checkRows(1)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'>1.23")
+        #tdSql.checkRows(3)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'>=1.232")
+        #tdSql.checkRows(3)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'!=1.232")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'!=3.232")
+        #tdSql.checkRows(3)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'/0=3")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'/5=1")
+        #tdSql.checkRows(1)
+
+        ## where json value is bool
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=true")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=false")
+        #tdSql.checkRows(1)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'!=false")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'>false")
+        #tdSql.checkRows(0)
+
+        ## where json value is null
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=null")
+        #tdSql.checkRows(0)
+
+        ## where json key is null
+        #tdSql.query("select * from jsons1 where jtag->'tag_no_exist'=3")
+        #tdSql.checkRows(0)
+
+        ## where json value is not exist
+        #tdSql.query("select * from jsons1 where jtag->'tag1' is null")
+        #tdSql.checkData(0, 0, 'jsons1_9')
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag4' is null")
+        #tdSql.checkRows(9)
+        #tdSql.query("select * from jsons1 where jtag->'tag3' is not null")
+        #tdSql.checkRows(3)
+
+        ## test contains
+        #tdSql.query("select * from jsons1 where jtag contains 'tag1'")
+        #tdSql.checkRows(8)
+        #tdSql.query("select * from jsons1 where jtag contains 'tag3'")
+        #tdSql.checkRows(4)
+        #tdSql.query("select * from jsons1 where jtag contains 'tag_no_exist'")
+        #tdSql.checkRows(0)
+
+        ## test json tag in where condition with and/or
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=false and jtag->'tag2'='beijing'")
+        #tdSql.checkRows(1)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=false or jtag->'tag2'='beijing'")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=false and jtag->'tag2'='shanghai'")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=false and jtag->'tag2'='shanghai'")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=13 or jtag->'tag2'>35")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'=13 or jtag->'tag2'>35")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag1' is not null and jtag contains 'tag3'")
+        #tdSql.checkRows(3)
+        #tdSql.query("select * from jsons1 where jtag->'tag1'='femail' and jtag contains 'tag3'")
+        #tdSql.checkRows(2)
+
+
+        ## test with between and
+        #tdSql.query("select * from jsons1 where jtag->'tag1' between 1 and 30")
+        #tdSql.checkRows(3)
+        #tdSql.query("select * from jsons1 where jtag->'tag1' between 'femail' and 'beijing'")
+        #tdSql.checkRows(2)
+
+        ## test with tbname/normal column
+        #tdSql.query("select * from jsons1 where tbname = 'jsons1_1'")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where tbname = 'jsons1_1' and jtag contains 'tag3'")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where tbname = 'jsons1_1' and jtag contains 'tag3' and dataint=3")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where tbname = 'jsons1_1' and jtag contains 'tag3' and dataint=23")
+        #tdSql.checkRows(1)
+
+
+        ## test where condition like
+        #tdSql.query("select * from jsons1 where jtag->'tag2' like 'bei%'")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag1' like 'fe%' and jtag->'tag2' is not null")
+        #tdSql.checkRows(2)
+
+        ## test where condition in  no support in
+        #tdSql.error("select * from jsons1 where jtag->'tag1' in ('beijing')")
+
+        ## test where condition match/nmath
+        #tdSql.query("select * from jsons1 where jtag->'tag1' match 'ma'")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag1' match 'ma$'")
+        #tdSql.checkRows(0)
+        #tdSql.query("select * from jsons1 where jtag->'tag2' match 'jing$'")
+        #tdSql.checkRows(2)
+        #tdSql.query("select * from jsons1 where jtag->'tag1' match '收到'")
+        #tdSql.checkRows(1)
+        #tdSql.query("select * from jsons1 where jtag->'tag1' nmatch 'ma'")
+        #tdSql.checkRows(1)
+
+        ## test distinct
+        #tdSql.execute("insert into jsons1_14 using jsons1 tags('{\"tag1\":\"收到货\",\"tag2\":\"\",\"tag3\":null}') values(1591062628000, 2, NULL, '你就会', 'dws')")
+        #tdSql.query("select distinct jtag->'tag1' from jsons1")
+        #tdSql.checkRows(7)
+        ## tdSql.query("select distinct jtag from jsons1")
+        ## tdSql.checkRows(9)
+
+        ##test dumplicate key with normal colomn
+        #tdSql.execute("INSERT INTO jsons1_15 using jsons1 tags('{\"tbname\":\"tt\",\"databool\":true,\"datastr\":\"是是是\"}') values(1591060828000, 4, false, 'jjsf', \"你就会\")")
+        #tdSql.query("select * from jsons1 where jtag->'datastr' match '是' and datastr match 'js'")
+        #tdSql.checkRows(1)
+        ## tdSql.query("select tbname,jtag->'tbname' from jsons1 where jtag->'tbname'='tt' and tbname='jsons1_14'")
+        ## tdSql.checkRows(1)
+
+        ## test join
+        #tdSql.execute("create table if not exists jsons2(ts timestamp, dataInt int, dataBool bool, dataStr nchar(50), dataStrBin binary(150)) tags(jtag json)")
+        #tdSql.execute("insert into jsons2_1 using jsons2 tags('{\"tag1\":\"fff\",\"tag2\":5, \"tag3\":true}') values(1591060618000, 2, false, 'json2', '你是2')")
+        #tdSql.execute("insert into jsons2_2 using jsons2 tags('{\"tag1\":5,\"tag2\":null}') values (1591060628000, 2, true, 'json2', 'sss')")
+
+        #tdSql.execute("create table if not exists jsons3(ts timestamp, dataInt int, dataBool bool, dataStr nchar(50), dataStrBin binary(150)) tags(jtag json)")
+        #tdSql.execute("insert into jsons3_1 using jsons3 tags('{\"tag1\":\"fff\",\"tag2\":5, \"tag3\":true}') values(1591060618000, 3, false, 'json3', '你是3')")
+        #tdSql.execute("insert into jsons3_2 using jsons3 tags('{\"tag1\":5,\"tag2\":\"beijing\"}') values (1591060638000, 2, true, 'json3', 'sss')")
+        #tdSql.query("select 'sss',33,a.jtag->'tag3' from jsons2 a,jsons3 b where a.ts=b.ts and a.jtag->'tag1'=b.jtag->'tag1'")
+        #tdSql.checkData(0, 0, "sss")
+        #tdSql.checkData(0, 2, "true")
+
+        #res = tdSql.getColNameList("select 'sss',33,a.jtag->'tag3' from jsons2 a,jsons3 b where a.ts=b.ts and a.jtag->'tag1'=b.jtag->'tag1'")
+        #cname_list = []
+        #cname_list.append("'sss'")
+        #cname_list.append("33")
+        #cname_list.append("a.jtag->'tag3'")
+        #tdSql.checkColNameList(res, cname_list)
+        ##
+        ## test group by & order by  json tag
+        #tdSql.query("select ts,jtag->'tag1' from jsons1 partition by jtag->'tag1' order by jtag->'tag1' desc")
+        #tdSql.checkRows(11)
+        #tdSql.checkData(0, 1, '"femail"')
+        #tdSql.checkData(2, 1, '"收到货"')
+        #tdSql.checkData(7, 1, "false")
+
+
+        #tdSql.error("select count(*) from jsons1 group by jtag")
+        #tdSql.error("select count(*) from jsons1 partition by jtag")
+        #tdSql.error("select count(*) from jsons1 group by jtag order by jtag")
+        #tdSql.error("select count(*) from jsons1 group by jtag->'tag1' order by jtag->'tag2'")
+        #tdSql.error("select count(*) from jsons1 group by jtag->'tag1' order by jtag")
+        #tdSql.query("select count(*),jtag->'tag1' from jsons1 group by jtag->'tag1' order by jtag->'tag1' desc")
+        #tdSql.checkRows(8)
+        #tdSql.checkData(0, 0, 2)
+        #tdSql.checkData(0, 1, '"femail"')
+        #tdSql.checkData(1, 0, 2)
+        #tdSql.checkData(1, 1, '"收到货"')
+        #tdSql.checkData(2, 0, 1)
+        #tdSql.checkData(2, 1, "11.000000000")
+        #tdSql.checkData(5, 0, 1)
+        #tdSql.checkData(5, 1, "false")
+
+        #tdSql.query("select count(*),jtag->'tag1' from jsons1 group by jtag->'tag1' order by jtag->'tag1' asc")
+        #tdSql.checkRows(8)
+        #tdSql.checkData(0, 1, None)
+        #tdSql.checkData(2, 0, 1)
+        #tdSql.checkData(2, 1, "false")
+        #tdSql.checkData(5, 0, 1)
+        #tdSql.checkData(5, 1, "11.000000000")
+        #tdSql.checkData(7, 0, 2)
+        #tdSql.checkData(7, 1, '"femail"')
+
+        ## test stddev with group by json tag
+        #tdSql.query("select stddev(dataint),jtag->'tag1' from jsons1 group by jtag->'tag1' order by jtag->'tag1'")
+        #tdSql.checkRows(8)
+        #tdSql.checkData(0, 1, None)
+        #tdSql.checkData(4, 0, 0)
+        #tdSql.checkData(4, 1, "5.000000000")
+        #tdSql.checkData(7, 0, 11)
+        #tdSql.checkData(7, 1, '"femail"')
+
+        #res = tdSql.getColNameList("select stddev(dataint),jsons1.jtag->'tag1' from jsons1 group by jsons1.jtag->'tag1' order by jtag->'tag1'")
+        #cname_list = []
+        #cname_list.append("stddev(dataint)")
+        #cname_list.append("jsons1.jtag->'tag1'")
+        #tdSql.checkColNameList(res, cname_list)
+
+        ## test top/bottom with group by json tag
+        #tdSql.query("select top(dataint,2),jtag->'tag1' from jsons1 group by jtag->'tag1' order by jtag->'tag1'")
+        #tdSql.checkRows(11)
+        #tdSql.checkData(0, 1, None)
+        ##tdSql.checkData(2, 0, 24)
+        ##tdSql.checkData(3, 0, 3)
+        ##tdSql.checkData(3, 1, "false")
+        ##tdSql.checkData(8, 0, 2)
+        ##tdSql.checkData(10, 1, '"femail"')
+
+        ## test having
+        ## tdSql.query("select count(*),jtag->'tag1' from jsons1 group by jtag->'tag1' having count(*) > 1")
+        ## tdSql.checkRows(3)
+
+        ## subquery with json tag
+        #tdSql.query("select * from (select jtag, dataint from jsons1) order by dataint")
+        #tdSql.checkRows(11)
+        #tdSql.checkData(1, 1, 1)
+        #tdSql.checkData(5, 0, '{"tag1":false,"tag2":"beijing"}')
+
+        #tdSql.error("select jtag->'tag1' from (select jtag->'tag1', dataint from jsons1)")
+        #tdSql.error("select t->'tag1' from (select jtag->'tag1' as t, dataint from jsons1)")
+        ## tdSql.query("select ts,jtag->'tag1' from (select jtag->'tag1',tbname,ts from jsons1 order by ts)")
+        ## tdSql.checkRows(11)
+        ## tdSql.checkData(1, 1, "jsons1_1")
+        ## tdSql.checkData(1, 2, '"femail"')
+
+        ## union all
+        #tdSql.query("select jtag->'tag1' from jsons1 union all select jtag->'tag2' from jsons2")
+        #tdSql.checkRows(13)
+        #tdSql.query("select jtag->'tag1' from jsons1_1 union all select jtag->'tag2' from jsons2_1")
+        #tdSql.checkRows(3)
+
+        #tdSql.query("select jtag->'tag1' from jsons1_1 union all select jtag->'tag1' from jsons2_1")
+        #tdSql.checkRows(3)
+        #tdSql.query("select dataint,jtag->'tag1',tbname from jsons1 union all select dataint,jtag->'tag1',tbname from jsons2")
+        #tdSql.checkRows(13)
+        #tdSql.query("select dataint,jtag,tbname from jsons1 union all select dataint,jtag,tbname from jsons2")
+        #tdSql.checkRows(13)
+
+        ##show create table
+        #tdSql.query("show create table jsons1")
+        #tdSql.checkData(0, 1, 'CREATE STABLE `jsons1` (`ts` TIMESTAMP, `dataint` INT, `databool` BOOL, `datastr` NCHAR(50), `datastrbin` VARCHAR(150)) TAGS (`jtag` JSON) WATERMARK 5000a, 5000a')
+
+        ##test aggregate function:count/avg/twa/irate/sum/stddev/leastsquares
+        #tdSql.query("select count(*) from jsons1 where jtag is not null")
+        #tdSql.checkData(0, 0, 10)
+        #tdSql.query("select avg(dataint) from jsons1 where jtag is not null")
+        #tdSql.checkData(0, 0, 5.3)
+        ## tdSql.query("select twa(dataint) from jsons1 where jtag is not null")
+        ## tdSql.checkData(0, 0, 28.386363636363637)
+        ## tdSql.query("select irate(dataint) from jsons1 where jtag is not null")
+
+        #tdSql.query("select sum(dataint) from jsons1 where jtag->'tag1' is not null")
+        #tdSql.checkData(0, 0, 45)
+        #tdSql.query("select stddev(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkData(0, 0, 4.496912521)
+        #tdSql.query("SELECT LEASTSQUARES(dataint, 1, 1) from jsons1 where jtag is not null")
+
+        ##test selection function:min/max/first/last/top/bottom/percentile/apercentile/last_row/interp
+        #tdSql.query("select min(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkData(0, 0, 1)
+        #tdSql.query("select max(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkData(0, 0, 11)
+        #tdSql.query("select first(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkData(0, 0, 2)
+        #tdSql.query("select last(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkData(0, 0, 11)
+        #tdSql.query("select top(dataint,100) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkRows(3)
+        #tdSql.query("select bottom(dataint,100) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkRows(3)
+        ##tdSql.query("select percentile(dataint,20) from jsons1 where jtag->'tag1'>1")
+        #tdSql.query("select apercentile(dataint, 50) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkData(0, 0, 1.5)
+        ## tdSql.query("select last_row(dataint) from jsons1 where jtag->'tag1'>1")
+        ## tdSql.query("select interp(dataint) from jsons1 where ts = '2020-06-02 09:17:08.000' and jtag->'tag1'>1")
+
+        ##test calculation function:diff/derivative/spread/ceil/floor/round/
+        #tdSql.query("select diff(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkRows(2)
+        ## tdSql.checkData(0, 0, -1)
+        ## tdSql.checkData(1, 0, 10)
+        #tdSql.query("select derivative(dataint, 10m, 0) from jsons1 where jtag->'tag1'>1")
+        ## tdSql.checkData(0, 0, -2)
+        #tdSql.query("select spread(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkData(0, 0, 10)
+        #tdSql.query("select ceil(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkRows(3)
+        #tdSql.query("select floor(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkRows(3)
+        #tdSql.query("select round(dataint) from jsons1 where jtag->'tag1'>1")
+        #tdSql.checkRows(3)
+
+        ##math function
+        #tdSql.query("select sin(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select cos(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select tan(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select asin(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select acos(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select atan(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select ceil(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select floor(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select round(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select abs(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select pow(dataint,5) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select log(dataint,10) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select sqrt(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select HISTOGRAM(dataint,'user_input','[1, 33, 555, 7777]',1)  from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select csum(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select mavg(dataint,1) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select statecount(dataint,'GE',10) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select stateduration(dataint,'GE',0) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select sample(dataint,3) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select HYPERLOGLOG(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(1)
+        #tdSql.query("select twa(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(1)
+
+        ## function not ready
+        #tdSql.query("select tail(dataint,1) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(1)
+        #tdSql.query("select unique(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select mode(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(1)
+        #tdSql.query("select irate(dataint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(1)
+
+        ##str function
+        #tdSql.query("select upper(dataStr) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select ltrim(dataStr) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select lower(dataStr) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select rtrim(dataStr) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select LENGTH(dataStr) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select CHAR_LENGTH(dataStr) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select SUBSTR(dataStr,5) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select CONCAT(dataStr,dataStrBin) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select CONCAT_ws('adad!@!@%$^$%$^$%^a',dataStr,dataStrBin) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select CAST(dataStr as bigint) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+
+        ##time function
+        #tdSql.query("select now() from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select today() from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select TIMEZONE() from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select TO_ISO8601(ts) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select TO_UNIXTIMESTAMP(datastr) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select TIMETRUNCATE(ts,1s) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select TIMEDIFF(ts,_c0) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select TIMEDIFF(ts,1u) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(3)
+        #tdSql.query("select ELAPSED(ts,1h) from jsons1 where jtag->'tag1'>1;")
+        #tdSql.checkRows(1)
+
+        ##test TD-12077
+        #tdSql.execute("insert into jsons1_16 using jsons1 tags('{\"tag1\":\"收到货\",\"tag2\":\"\",\"tag3\":-2.111}') values(1591062628000, 2, NULL, '你就会', 'dws')")
+        #tdSql.query("select jtag->'tag3' from jsons1_16")
+        #tdSql.checkData(0, 0, '-2.111000000')
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
+