diff --git a/tests/system-test/2-query/cast.py b/tests/system-test/2-query/cast.py
index 0e849410b7b6ca29a739c4309d6123d5c9508ede..e07ab95f456be87536b65a96af63207426c140f0 100644
--- a/tests/system-test/2-query/cast.py
+++ b/tests/system-test/2-query/cast.py
@@ -20,7 +20,7 @@ class TDTestCase:
         __sql = f"select cast({col_name} as bigint), {col_name} from {tbname}"
         tdSql.query(sql=__sql)
         data_tb_col = [result[1] for result in tdSql.queryResult]
-        for i in range(len(tdSql.queryRows)):
+        for i in range(tdSql.queryRows):
             tdSql.checkData( i, 0, None ) if data_tb_col[i] is None else tdSql.checkData( i, 0, int(data_tb_col[i]) )
 
     def __range_to_bigint(self,cols,tables):
@@ -32,7 +32,7 @@ class TDTestCase:
         __sql = f"select cast({col_name} as timestamp), {col_name} from {tbname}"
         tdSql.query(sql=__sql)
         data_tb_col = [result[1] for result in tdSql.queryResult]
-        for i in range(len(tdSql.queryRows)):
+        for i in range(tdSql.queryRows):
             if data_tb_col[i] is None:
                 tdSql.checkData( i, 0 , None )
             if col_name not in ["c2", "double"] or tbname != "t1" or i != 10:
@@ -597,37 +597,37 @@ class TDTestCase:
 
         tdLog.printNoPrefix("==========step39: cast constant operation to bigint, expect change to int ")
         tdSql.query("select cast(12121.23323131  as bigint) as b from ct4")
-        ( tdSql.checkData(i, 0, 12121) for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, 12121) for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131  as binary(16)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12121.233231') for i in range(len(tdSql.queryRows)) )
+        ( tdSql.checkData(i, 0, '12121.233231') for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131  as binary(2)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12') for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, '12') for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131  as nchar(16)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12121.233231') for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, '12121.233231') for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131  as nchar(2)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12') for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, '12') for i in range(tdSql.queryRows) )
 
         tdSql.query("select cast(12121.23323131 + 321.876897998  as bigint) as b from ct4")
-        ( tdSql.checkData(i, 0, 12443) for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, 12443) for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131 + 321.876897998  as binary(16)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12443.110129') for i in range(len(tdSql.queryRows)) )
+        ( tdSql.checkData(i, 0, '12443.110129') for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131 + 321.876897998  as binary(3)) as b from ct4")
-        ( tdSql.checkData(i, 0, '124') for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, '124') for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131 + 321.876897998  as nchar(16)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12443.110129') for i in range(len(tdSql.queryRows)) )
+        ( tdSql.checkData(i, 0, '12443.110129') for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131 + 321.876897998  as nchar(3)) as b from ct4")
-        ( tdSql.checkData(i, 0, '124') for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, '124') for i in range(tdSql.queryRows) )
 
         tdSql.query("select cast(12121.23323131 + 'test~!@`#$%^&*()}{][;><.,' as bigint) as b from ct4")
-        ( tdSql.checkData(i, 0, 12121) for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, 12121) for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131 + 'test~!@`#$%^&*()}{][;><.,' as binary(16)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12121.233231') for i in range(len(tdSql.queryRows)) )
+        ( tdSql.checkData(i, 0, '12121.233231') for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131 + 'test~!@`#$%^&*()}{][;><.,' as binary(2)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12') for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, '12') for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131 + 'test~!@`#$%^&*()}{][;><.,' as nchar(16)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12121.233231') for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, '12121.233231') for i in range(tdSql.queryRows) )
         tdSql.query("select cast(12121.23323131 + 'test~!@`#$%^&*()}{][;><.,' as nchar(2)) as b from ct4")
-        ( tdSql.checkData(i, 0, '12') for i in range(len(tdSql.queryRows) ) )
+        ( tdSql.checkData(i, 0, '12') for i in range(tdSql.queryRows) )
 
         tdLog.printNoPrefix("==========step40: error cast condition, should return error ")
         tdSql.error("select cast(c1 as int) as b from ct4")
diff --git a/tests/system-test/2-query/char_length.py b/tests/system-test/2-query/char_length.py
index e78db3b8b010a08329545af0e927fc946bb9ae33..97d5a5f59a449ed4a923e713d190ce5b679fe5b7 100644
--- a/tests/system-test/2-query/char_length.py
+++ b/tests/system-test/2-query/char_length.py
@@ -232,13 +232,13 @@ class TDTestCase:
         tdLog.printNoPrefix("==========step3:all check")
         self.all_test()
 
-        # tdDnodes.stop(1)
-        # tdDnodes.start(1)
+        tdDnodes.stop(1)
+        tdDnodes.start(1)
 
-        # tdSql.execute("use db")
+        tdSql.execute("use db")
 
-        # tdLog.printNoPrefix("==========step4:after wal, all check again ")
-        # self.all_test()
+        tdLog.printNoPrefix("==========step4:after wal, all check again ")
+        self.all_test()
 
     def stop(self):
         tdSql.close()
diff --git a/tests/system-test/fulltest.sh b/tests/system-test/fulltest.sh
index ecec2ada63f00116cd11e7e16dd20db4e85af37e..830f3a0cd4bb7c6b6c79dcd0f011a59aa5d9259a 100755
--- a/tests/system-test/fulltest.sh
+++ b/tests/system-test/fulltest.sh
@@ -14,6 +14,9 @@ python3 ./test.py -f 2-query/varchar.py
 python3 ./test.py -f 2-query/ltrim.py
 python3 ./test.py -f 2-query/rtrim.py
 python3 ./test.py -f 2-query/length.py
+python3 ./test.py -f 2-query/char_length.py
+python3 ./test.py -f 2-query/upper.py
+python3 ./test.py -f 2-query/lower.py
 
 python3 ./test.py -f 2-query/timezone.py
 python3 ./test.py -f 2-query/Now.py