diff --git a/tests/script/tsim/sync/oneReplica1VgElectWithInsert.sim b/tests/script/tsim/sync/oneReplica1VgElectWithInsert.sim
index 06a67b3c1b..b816226cff 100644
--- a/tests/script/tsim/sync/oneReplica1VgElectWithInsert.sim
+++ b/tests/script/tsim/sync/oneReplica1VgElectWithInsert.sim
@@ -31,7 +31,7 @@ if $data[0][4] != ready then
   goto check_dnode_ready
 endi
 
-#sql connect
+sql connect
 sql create dnode $hostname port 7200
 sql create dnode $hostname port 7300
 sql create dnode $hostname port 7400
@@ -71,7 +71,7 @@ sql create database db replica $replica vgroups $vgroups
 $loop_cnt = 0
 check_db_ready:
 $loop_cnt = $loop_cnt + 1
-sleep 200
+sleep 20
 if $loop_cnt == 10 then
   print ====> db not ready!
 	return -1
@@ -93,13 +93,12 @@ $loop_cnt = 0
 check_vg_ready:
 $loop_cnt = $loop_cnt + 1
 sleep 200
-if $loop_cnt == 10 then
+if $loop_cnt == 300 then
   print ====> vgroups not ready!
 	return -1
 endi
 sql show vgroups
 print ===> rows: $rows
-print $data(2)[0] $data(2)[1] $data(2)[2] $data(2)[3] $data(2)[4] $data(2)[5] $data(2)[6] $data(2)[7] $data(2)[8] $data(2)[9] $data(2)[10] $data(2)[11] $data(2)[12] $data(2)[13]
 print $data[0][0] $data[0][1] $data[0][2] $data[0][3] $data[0][4] $data[0][5] $data[0][6] $data[0][7] $data[0][8] $data[0][9] $data[10][6] $data[0][11] $data[0][12] $data[0][13]
 if $rows != $vgroups then
   return -1
@@ -132,10 +131,12 @@ if $data[0][8] == leader then
      goto check_vg_ready
    endi    
    print ---- vgroup $data[0][0] leader locate on dnode $data[0][7] 
-  goto vg_ready
+   goto vg_ready
+else
+   goto check_vg_ready
 endi
-vg_ready:
 
+vg_ready:
 print ====>  create stable/child table
 sql create table stb (ts timestamp, c1 int, c2 float, c3 binary(10)) tags (t1 int)
 
@@ -156,27 +157,13 @@ while $i < $tbNum
   sql create table $ctb using stb tags( $i )
   $ntb = $ntbPrefix . $i
   sql create table $ntb (ts timestamp, c1 int, c2 float, c3 binary(10))
-  
-#  $x = 0
-#  while $x < $rowNum
-#    $binary = ' . binary
-#    $binary = $binary . $i
-#    $binary = $binary . '
-#
-#    sql insert into $ctb values ($tstart , $i , $x , $binary )
-#    sql insert into $ntb values ($tstart , 999 , 999 , 'binary-ntb' )
-#    $tstart = $tstart + 1
-#    $x = $x + 1
-#  endw
-  
-#  print ====> insert rows: $rowNum into $ctb and $ntb
-
   $i = $i + 1
-#  $tstart = 1640966400000
 endw
 
 $totalTblNum = $tbNum * 2
+sleep 1000
 sql show tables
+print ====> expect $totalTblNum and infinsert $rows  in fact 
 if $rows != $totalTblNum then 
   return -1
 endi
@@ -185,7 +172,7 @@ print ====>  create a normal table for interaction between main and back threads
 sql create table interaction (ts timestamp, flag binary(10), childrows int, stbrows int)
 
 print ====> start to run_back to insert data
-run_back tsim/tmq/insertDataByRunBack.sim
+run_back tsim/sync/insertDataByRunBack.sim
 
 
 print ====> waiting insert thread starting insert data
@@ -222,12 +209,15 @@ endi
 $dnodeId = dnode . $dnodeId
 print ====> stop $dnodeId
 system sh/exec.sh -n $dnodeId -s stop -x SIGINT
+sleep 1000
+print ====> start $dnodeId
+system sh/exec.sh -n $dnodeId -s start
 
 $loop_cnt = 0
 check_vg_ready_2:
 $loop_cnt = $loop_cnt + 1
 sleep 200
-if $loop_cnt == 10 then
+if $loop_cnt == 300 then
   print ====> vgroups switch fail!!!
 	return -1
 endi
@@ -242,38 +232,38 @@ if $data[0][4] == leader then
    if $data[0][6] != NULL then
      goto check_vg_ready_2
    endi
-   if $data[0][8] != NULL then
+   if $data[0][8] != FOLLOWER then
      goto check_vg_ready_2
    endi
-   print ---- vgroup $data[0][0] leader switch to dnode $data[0][3] 
+   print ---- vgroup $dnodeId leader switch to dnode $data[0][3] 
   goto vg_ready_2
 endi
 if $data[0][6] == leader then
    if $data[0][4] != NULL then
      goto check_vg_ready_2
    endi
-   if $data[0][8] != NULL then
+   if $data[0][8] != FOLLOWER then
      goto check_vg_ready_2
    endi    
-   print ---- vgroup $data[0][0] leader switch to dnode $data[0][5] 
+   print ---- vgroup $dnodeId leader switch to dnode $data[0][5] 
   goto vg_ready_2
 endi
 if $data[0][8] == leader then
    if $data[0][4] != NULL then
      goto check_vg_ready_2
    endi
-   if $data[0][6] != NULL then
+   if $data[0][6] != FOLLOWER then
      goto check_vg_ready_2
    endi    
-   print ---- vgroup $data[0][0] leader switch to dnode $data[0][7] 
+   print ---- vgroup $dnodeId leader switch to dnode $data[0][7] 
   goto vg_ready_2
+else 
+  goto check_vg_ready_2
 endi
 vg_ready_2:
 
 $switch_loop_cnt = $switch_loop_cnt + 1
 if $switch_loop_cnt < 3 then
-  print ====> start $dnodeId
-  system sh/exec.sh -n $dnodeId -s start
   goto switch_leader_loop
 endi
 
@@ -347,7 +337,7 @@ if $data[0][4] == leader then
    if $data[0][6] != NULL then
      goto check_vg_ready_1
    endi
-   if $data[0][8] != NULL then
+   if $data[0][8] != FOLLOWER then
      goto check_vg_ready_1
    endi    
   goto vg_ready_1
@@ -356,7 +346,7 @@ if $data[0][6] == leader then
    if $data[0][4] != NULL then
      goto check_vg_ready_1
    endi
-   if $data[0][8] != NULL then
+   if $data[0][8] != FOLLOWER then
      goto check_vg_ready_1
    endi    
   goto vg_ready_1
@@ -365,7 +355,7 @@ if $data[0][8] == leader then
    if $data[0][4] != NULL then
      goto check_vg_ready_1
    endi
-   if $data[0][6] != NULL then
+   if $data[0][6] != FOLLOWER then
      goto check_vg_ready_1
    endi    
   goto vg_ready_1
@@ -394,6 +384,73 @@ if $data[0][0] != $totalRowsOfStb then
   return -1
 endi
 
+print ====> once stop one dnode by loop, and do query every time
+$i = 2
+loop_stop_dnode:
+$dnodeId = dnode . $i
+print ====> stop $dnodeId
+system sh/exec.sh -n $dnodeId -s stop -x SIGINT
+
+check_vg_ready_3:
+sql show vgroups
+print $data(2)[0] $data(2)[1] $data(2)[2] $data(2)[3] $data(2)[4] $data(2)[5] $data(2)[6] $data(2)[7] $data(2)[8] $data(2)[9] $data(2)[10] $data(2)[11] $data(2)[12] $data(2)[13]
+if $data[0][4] == LEADER then
+  if $data[0][6] == LEADER then
+    goto check_vg_ready_3
+  endi
+  if $data[0][8] == LEADER then
+    goto check_vg_ready_3
+  endi
+  print ---- vgroup $data[0][0] leader locating dnode $data[0][5]
+elif $data[0][6] == LEADER then
+  if $data[0][4] == LEADER then
+    goto check_vg_ready_3
+  endi
+  if $data[0][8] == LEADER then
+    goto check_vg_ready_3
+  endi
+  print ---- vgroup $data[0][0] leader locating dnode $data[0][7]
+elif $data[0][8] == LEADER then
+  if $data[0][4] == LEADER then
+    goto check_vg_ready_3
+  endi
+  if $data[0][6] == LEADER then
+    goto check_vg_ready_3
+  endi
+  print ---- vgroup $data[0][0] leader locating dnode $data[0][9]
+else 
+   print ====> no leader vnode!!!
+  return -1 
+endi
+
+sql select count(*) from ntb0
+print rows: $rows 
+print $data[0][0]  $data[0][1]
+if $data[0][0] != $totalRowsOfCtb then 
+  return -1
+endi
+
+sql select count(*) from ctb0
+print rows: $rows 
+print $data[0][0]  $data[0][1]
+if $data[0][0] != $totalRowsOfCtb then 
+  return -1
+endi
+
+sql select count(*) from stb
+print rows: $rows 
+print $data[0][0]  $data[0][1]
+if $data[0][0] != $totalRowsOfStb then 
+  return -1
+endi
+
+$i = $i + 1
+if $i <= 4 then 
+  print ====> start $dnodeId
+  system sh/exec.sh -n $dnodeId -s start
+  goto loop_stop_dnode
+endi
+
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 system sh/exec.sh -n dnode2 -s stop -x SIGINT
 system sh/exec.sh -n dnode3 -s stop -x SIGINT
diff --git a/tests/system-test/1-insert/test_stmt_insert_query_ex.py b/tests/system-test/1-insert/test_stmt_insert_query_ex.py
index 376b60d615..c0836b79c8 100644
--- a/tests/system-test/1-insert/test_stmt_insert_query_ex.py
+++ b/tests/system-test/1-insert/test_stmt_insert_query_ex.py
@@ -80,93 +80,9 @@ class TDTestCase:
         con=taos.connect(host=host, user=user, password=password, config=cfg ,port=port)
         print(con)
         return con
-
-    def test_stmt_insert_multi(self,conn):
-        # type: (TaosConnection) -> None
-
-        dbname = "pytest_taos_stmt_multi"
-        try:
-            conn.execute("drop database if exists %s" % dbname)
-            conn.execute("create database if not exists %s" % dbname)
-            conn.select_db(dbname)
-
-            conn.execute(
-                "create table if not exists log(ts timestamp, bo bool, nil tinyint, ti tinyint, si smallint, ii int,\
-                bi bigint, tu tinyint unsigned, su smallint unsigned, iu int unsigned, bu bigint unsigned, \
-                ff float, dd double, bb binary(100), nn nchar(100), tt timestamp)",
-            )
-            # conn.load_table_info("log")
-
-            start = datetime.now()
-            stmt = conn.statement("insert into log values(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)")
-
-            params = new_multi_binds(16)
-            params[0].timestamp((1626861392589, 1626861392590, 1626861392591))
-            params[1].bool((True, None, False))
-            params[2].tinyint([-128, -128, None]) # -128 is tinyint null
-            params[3].tinyint([0, 127, None])
-            params[4].smallint([3, None, 2])
-            params[5].int([3, 4, None])
-            params[6].bigint([3, 4, None])
-            params[7].tinyint_unsigned([3, 4, None])
-            params[8].smallint_unsigned([3, 4, None])
-            params[9].int_unsigned([3, 4, None])
-            params[10].bigint_unsigned([3, 4, None])
-            params[11].float([3, None, 1])
-            params[12].double([3, None, 1.2])
-            params[13].binary(["abc", "dddafadfadfadfadfa", None])
-            params[14].nchar(["涛思数据", None, "a long string with 中文字符"])
-            params[15].timestamp([None, None, 1626861392591])
-            # print(type(stmt))
-            stmt.bind_param_batch(params)
-            stmt.execute()
-            end = datetime.now()
-            print("elapsed time: ", end - start)
-            assert stmt.affected_rows == 3
-            
-            #query
-            querystmt=conn.statement("select ?,bu from log")
-            queryparam=new_bind_params(1)
-            print(type(queryparam))
-            queryparam[0].binary("ts")
-            querystmt.bind_param(queryparam)
-            querystmt.execute() 
-            result=querystmt.use_result()
-            # rows=result.fetch_all()
-            # print( querystmt.use_result())
-
-            # result = conn.query("select * from log")
-            rows=result.fetch_all()
-            # rows=result.fetch_all()
-            print(rows)
-            assert rows[1][0] == "ts"
-            assert rows[0][1] == 3
-
-            #query
-            querystmt1=conn.statement("select * from log where bu < ?")
-            queryparam1=new_bind_params(1)
-            print(type(queryparam1))
-            queryparam1[0].int(4)
-            querystmt1.bind_param(queryparam1)
-            querystmt1.execute() 
-            result1=querystmt1.use_result()
-            rows1=result1.fetch_all()
-            assert str(rows1[0][0]) == "2021-07-21 17:56:32.589000"
-            assert rows1[0][10] == 3
-
-
-            stmt.close()
-
-            # conn.execute("drop database if exists %s" % dbname)
-            conn.close()
-
-        except Exception as err:
-            # conn.execute("drop database if exists %s" % dbname)
-            conn.close()
-            raise err
         
     def test_stmt_set_tbname_tag(self,conn):
-        dbname = "pytest_taos_stmt_set_tbname_tag"
+        dbname = "stmt_set_tbname_tag"
         
         try:
             conn.execute("drop database if exists %s" % dbname)
@@ -174,16 +90,16 @@ class TDTestCase:
             conn.select_db(dbname)
             conn.execute("create table if not exists log(ts timestamp, bo bool, nil tinyint, ti tinyint, si smallint, ii int,\
                 bi bigint, tu tinyint unsigned, su smallint unsigned, iu int unsigned, bu bigint unsigned, \
-                ff float, dd double, bb binary(100), nn nchar(100), tt timestamp) tags (t1 timestamp, t2 bool,\
+                ff float, dd double, bb binary(100), nn nchar(100), tt timestamp , vc varchar(100)) tags (t1 timestamp, t2 bool,\
                 t3 tinyint, t4 tinyint, t5 smallint, t6 int, t7 bigint, t8 tinyint unsigned, t9 smallint unsigned, \
                 t10 int unsigned, t11 bigint unsigned, t12 float, t13 double, t14 binary(100), t15 nchar(100), t16 timestamp)")
             
             stmt = conn.statement("insert into ? using log tags (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?) \
-                values (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)")
+                values (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)")
             tags = new_bind_params(16)
             tags[0].timestamp(1626861392589123, PrecisionEnum.Microseconds)
             tags[1].bool(True)
-            tags[2].null()
+            tags[2].bool(False)
             tags[3].tinyint(2)
             tags[4].smallint(3)
             tags[5].int(4)
@@ -198,7 +114,7 @@ class TDTestCase:
             tags[14].nchar("stmt")
             tags[15].timestamp(1626861392589, PrecisionEnum.Milliseconds)
             stmt.set_tbname_tags("tb1", tags)
-            params = new_multi_binds(16)
+            params = new_multi_binds(17)
             params[0].timestamp((1626861392589111,  1626861392590111, 1626861392591111))
             params[1].bool((True, None, False))
             params[2].tinyint([-128, -128, None]) # -128 is tinyint null
@@ -213,25 +129,32 @@ class TDTestCase:
             params[11].float([3, None, 1])
             params[12].double([3, None, 1.2])
             params[13].binary(["abc", "dddafadfadfadfadfa", None])
-            params[14].nchar(["涛思数据", None, "a? long string with 中文字符"])
+            params[14].nchar(["涛思数据", None, "a long string with 中文字符"])
             params[15].timestamp([None, None, 1626861392591])
-            
+            params[16].binary(["涛思数据16", None, "a long string with 中文-字符"])
+                     
             stmt.bind_param_batch(params)
             stmt.execute()
 
             assert stmt.affected_rows == 3
 
-            #query
+            #query all 
             querystmt1=conn.statement("select * from log where bu < ?")
             queryparam1=new_bind_params(1)
             print(type(queryparam1))
-            queryparam1[0].int(5)
+            queryparam1[0].int(10)
             querystmt1.bind_param(queryparam1)
             querystmt1.execute() 
             result1=querystmt1.use_result()
             rows1=result1.fetch_all()
-            print("1",rows1)
+            print(rows1[0])
+            print(rows1[1])
+            print(rows1[2])
+            assert str(rows1[0][0]) == "2021-07-21 17:56:32.589111"
+            assert rows1[0][10] == 3
+            assert rows1[1][10] == 4
 
+            #query: Numeric Functions
             querystmt2=conn.statement("select abs(?) from log where bu < ?")
             queryparam2=new_bind_params(2)
             print(type(queryparam2))
@@ -242,6 +165,11 @@ class TDTestCase:
             result2=querystmt2.use_result()
             rows2=result2.fetch_all()
             print("2",rows2)
+            assert rows2[0][0] == 5
+            assert rows2[1][0] == 5
+
+
+            #query: Numeric Functions and escapes
 
             querystmt3=conn.statement("select abs(?) from log where  nn= 'a? long string with 中文字符' ")
             queryparam3=new_bind_params(1)
@@ -252,9 +180,63 @@ class TDTestCase:
             result3=querystmt3.use_result()
             rows3=result3.fetch_all()
             print("3",rows3)
-            # assert str(rows1[0][0]) == "2021-07-21 17:56:32.589111"
-            # assert rows1[0][10] == 3
-            # assert rows1[1][10] == 4
+            assert rows3 == []
+
+            #query: string Functions
+
+            querystmt3=conn.statement("select CHAR_LENGTH(?) from log  ")
+            queryparam3=new_bind_params(1)
+            print(type(queryparam3))
+            queryparam3[0].binary('中文字符')
+            querystmt3.bind_param(queryparam3)
+            querystmt3.execute() 
+            result3=querystmt3.use_result()
+            rows3=result3.fetch_all()
+            print("4",rows3)
+            assert rows3[0][0] == 12, 'fourth case is failed'
+            assert rows3[1][0] == 12, 'fourth case is failed'
+
+            # #query: conversion Functions
+
+            # querystmt4=conn.statement("select cast( ? as bigint) from log  ")
+            # queryparam4=new_bind_params(1)
+            # print(type(queryparam4))
+            # queryparam4[0].binary('1232a')
+            # querystmt4.bind_param(queryparam4)
+            # querystmt4.execute() 
+            # result4=querystmt4.use_result()
+            # rows4=result4.fetch_all()
+            # print("5",rows4)
+            # assert rows4[0][0] == 1232
+            # assert rows4[1][0] == 1232
+
+            # querystmt4=conn.statement("select cast( ? as binary(10)) from log  ")
+            # queryparam4=new_bind_params(1)
+            # print(type(queryparam4))
+            # queryparam4[0].int(123)
+            # querystmt4.bind_param(queryparam4)
+            # querystmt4.execute() 
+            # result4=querystmt4.use_result()
+            # rows4=result4.fetch_all()
+            # print("6",rows4)
+            # assert rows4[0][0] == '123'
+            # assert rows4[1][0] == '123'
+
+            # #query: datatime Functions
+
+            # querystmt4=conn.statement(" select timediff('2021-07-21 17:56:32.590111',?,1s)  from log  ")
+            # queryparam4=new_bind_params(1)
+            # print(type(queryparam4))
+            # queryparam4[0].timestamp(1626861392591111)
+            # querystmt4.bind_param(queryparam4)
+            # querystmt4.execute() 
+            # result4=querystmt4.use_result()
+            # rows4=result4.fetch_all()
+            # print("7",rows4)
+            # assert rows4[0][0] == 1, 'seventh case is failed'
+            # assert rows4[1][0] == 1, 'seventh case is failed'
+            
+            
 
             # conn.execute("drop database if exists %s" % dbname)
             conn.close()
@@ -269,8 +251,6 @@ class TDTestCase:
         config = buildPath+ "../sim/dnode1/cfg/"
         host="localhost"
         connectstmt=self.newcon(host,config)
-        self.test_stmt_insert_multi(connectstmt)
-        connectstmt=self.newcon(host,config)
         self.test_stmt_set_tbname_tag(connectstmt)
 
         return 
diff --git a/tests/system-test/1-insert/test_stmt_muti_insert_query.py b/tests/system-test/1-insert/test_stmt_muti_insert_query.py
index 486bcd8062..f838fd90f5 100644
--- a/tests/system-test/1-insert/test_stmt_muti_insert_query.py
+++ b/tests/system-test/1-insert/test_stmt_muti_insert_query.py
@@ -124,7 +124,7 @@ class TDTestCase:
             print("elapsed time: ", end - start)
             assert stmt.affected_rows == 3
             
-            #query
+            #query 1
             querystmt=conn.statement("select ?,bu from log")
             queryparam=new_bind_params(1)
             print(type(queryparam))
@@ -141,8 +141,9 @@ class TDTestCase:
             print(rows)
             assert rows[1][0] == "ts"
             assert rows[0][1] == 3
+            assert rows[2][1] == None
 
-            #query
+            #query 2
             querystmt1=conn.statement("select * from log where bu < ?")
             queryparam1=new_bind_params(1)
             print(type(queryparam1))
diff --git a/tests/system-test/1-insert/test_stmt_set_tbname_tag.py b/tests/system-test/1-insert/test_stmt_set_tbname_tag.py
index 54d5cfbafb..fb9f455d4d 100644
--- a/tests/system-test/1-insert/test_stmt_set_tbname_tag.py
+++ b/tests/system-test/1-insert/test_stmt_set_tbname_tag.py
@@ -82,7 +82,7 @@ class TDTestCase:
         return con
         
     def test_stmt_set_tbname_tag(self,conn):
-        dbname = "pytest_taos_stmt_set_tbname_tag"
+        dbname = "stmt_set_tbname_tag"
         
         try:
             conn.execute("drop database if exists %s" % dbname)
@@ -99,7 +99,7 @@ class TDTestCase:
             tags = new_bind_params(16)
             tags[0].timestamp(1626861392589123, PrecisionEnum.Microseconds)
             tags[1].bool(True)
-            tags[2].null()
+            tags[2].bool(False)
             tags[3].tinyint(2)
             tags[4].smallint(3)
             tags[5].int(4)
@@ -114,7 +114,7 @@ class TDTestCase:
             tags[14].nchar("stmt")
             tags[15].timestamp(1626861392589, PrecisionEnum.Milliseconds)
             stmt.set_tbname_tags("tb1", tags)
-            params = new_multi_binds(16)
+            params = new_multi_binds(17)
             params[0].timestamp((1626861392589111,  1626861392590111, 1626861392591111))
             params[1].bool((True, None, False))
             params[2].tinyint([-128, -128, None]) # -128 is tinyint null
@@ -129,28 +129,153 @@ class TDTestCase:
             params[11].float([3, None, 1])
             params[12].double([3, None, 1.2])
             params[13].binary(["abc", "dddafadfadfadfadfa", None])
-            params[14].nchar(["涛思数据", None, "a long string with 中文字符"])
+            params[14].nchar(["涛思数据", None, "a long string with 中文?字符"])
             params[15].timestamp([None, None, 1626861392591])
-            params[16].binary(["涛思数据16", None, "a long string with 中文-字符"])
+            params[16].binary(["涛思数据16", None, None])
                      
             stmt.bind_param_batch(params)
             stmt.execute()
 
             assert stmt.affected_rows == 3
 
-            #query
+            #query all 
             querystmt1=conn.statement("select * from log where bu < ?")
             queryparam1=new_bind_params(1)
             print(type(queryparam1))
-            queryparam1[0].int(5)
+            queryparam1[0].int(10)
             querystmt1.bind_param(queryparam1)
             querystmt1.execute() 
             result1=querystmt1.use_result()
             rows1=result1.fetch_all()
-            print(rows1)
-            # assert str(rows1[0][0]) == "2021-07-21 17:56:32.589111"
-            # assert rows1[0][10] == 3
-            # assert rows1[1][10] == 4
+            print(rows1[0])
+            print(rows1[1])
+            print(rows1[2])
+            assert str(rows1[0][0]) == "2021-07-21 17:56:32.589111"
+            assert rows1[0][10] == 3
+            assert rows1[1][10] == 4
+
+            #query: Numeric Functions
+            querystmt2=conn.statement("select abs(?) from log where bu < ?")
+            queryparam2=new_bind_params(2)
+            print(type(queryparam2))
+            queryparam2[0].int(5)
+            queryparam2[1].int(5)
+            querystmt2.bind_param(queryparam2)
+            querystmt2.execute() 
+            result2=querystmt2.use_result()
+            rows2=result2.fetch_all()
+            print("2",rows2)
+            assert rows2[0][0] == 5
+            assert rows2[1][0] == 5
+
+
+            #query: Numeric Functions and escapes
+
+            querystmt3=conn.statement("select abs(?) from log where  nn= 'a? long string with 中文字符' ")
+            queryparam3=new_bind_params(1)
+            print(type(queryparam3))
+            queryparam3[0].int(5)
+            querystmt3.bind_param(queryparam3)
+            querystmt3.execute() 
+            result3=querystmt3.use_result()
+            rows3=result3.fetch_all()
+            print("3",rows3)
+            assert rows3 == []
+
+            # #query: string Functions
+
+            # querystmt3=conn.statement("select CHAR_LENGTH(?) from log  ")
+            # queryparam3=new_bind_params(1)
+            # print(type(queryparam3))
+            # queryparam3[0].binary('中文字符')
+            # querystmt3.bind_param(queryparam3)
+            # querystmt3.execute() 
+            # result3=querystmt3.use_result()
+            # rows3=result3.fetch_all()
+            # print("4",rows3)
+            # assert rows3[0][0] == 12, 'fourth case is failed'
+            # assert rows3[1][0] == 12, 'fourth case is failed'
+
+            # #query: conversion Functions
+
+            # querystmt4=conn.statement("select cast( ? as bigint) from log  ")
+            # queryparam4=new_bind_params(1)
+            # print(type(queryparam4))
+            # queryparam4[0].binary('1232a')
+            # querystmt4.bind_param(queryparam4)
+            # querystmt4.execute() 
+            # result4=querystmt4.use_result()
+            # rows4=result4.fetch_all()
+            # print("5",rows4)
+            # assert rows4[0][0] == 1232
+            # assert rows4[1][0] == 1232
+
+            # querystmt4=conn.statement("select cast( ? as binary(10)) from log  ")
+            # queryparam4=new_bind_params(1)
+            # print(type(queryparam4))
+            # queryparam4[0].int(123)
+            # querystmt4.bind_param(queryparam4)
+            # querystmt4.execute() 
+            # result4=querystmt4.use_result()
+            # rows4=result4.fetch_all()
+            # print("6",rows4)
+            # assert rows4[0][0] == '123'
+            # assert rows4[1][0] == '123'
+
+            # #query: datatime Functions
+
+            # querystmt4=conn.statement(" select timediff('2021-07-21 17:56:32.590111',?,1s)  from log  ")
+            # queryparam4=new_bind_params(1)
+            # print(type(queryparam4))
+            # queryparam4[0].timestamp(1626861392591111)
+            # querystmt4.bind_param(queryparam4)
+            # querystmt4.execute() 
+            # result4=querystmt4.use_result()
+            # rows4=result4.fetch_all()
+            # print("7",rows4)
+            # assert rows4[0][0] == 1, 'seventh case is failed'
+            # assert rows4[1][0] == 1, 'seventh case is failed'
+            
+            #query: aggregate Functions
+
+            querystmt4=conn.statement(" select count(?)  from log  ")
+            queryparam4=new_bind_params(1)
+            print(type(queryparam4))
+            queryparam4[0].int(123)
+            querystmt4.bind_param(queryparam4)
+            querystmt4.execute() 
+            result4=querystmt4.use_result()
+            rows4=result4.fetch_all()
+            print("8",rows4)
+            assert rows4[0][0] == 3, ' 8 case is failed'
+
+            #query: selector Functions 9
+
+            querystmt4=conn.statement("  select bottom(bu,?)  from log group by bu ;  ")
+            queryparam4=new_bind_params(1)
+            print(type(queryparam4))
+            queryparam4[0].int(2)
+            querystmt4.bind_param(queryparam4)
+            querystmt4.execute() 
+            result4=querystmt4.use_result()
+            rows4=result4.fetch_all()
+            print("9",rows4)
+            assert rows4[0][0] == 4, ' 9 case is failed'
+            assert rows4[1][0] == 3, ' 9 case is failed'
+
+            # #query: time-series specific Functions 10
+
+            querystmt4=conn.statement("  select twa(?)  from log;  ")
+            queryparam4=new_bind_params(1)
+            print(type(queryparam4))
+            queryparam4[0].int(15)
+            querystmt4.bind_param(queryparam4)
+            querystmt4.execute() 
+            result4=querystmt4.use_result()
+            rows4=result4.fetch_all()
+            print("10",rows4)
+            assert rows4[0][0] == 15, ' 10 case is failed'
+
 
             # conn.execute("drop database if exists %s" % dbname)
             conn.close()