diff --git a/tests/system-test/2-query/concat.py b/tests/system-test/2-query/concat.py
index c1301a1e21..2185e381f3 100644
--- a/tests/system-test/2-query/concat.py
+++ b/tests/system-test/2-query/concat.py
@@ -82,7 +82,7 @@ class TDTestCase:
 
             if num > 8 or num < 2 :
                 [tdSql.error(f"select concat( {','.join( condition ) })  from {tbname} {where_condition}  {group} ") for group in groups ]
-
+                return
 
             tdSql.query(f"select  {','.join(condition)}  from {tbname}  ")
             rows = tdSql.queryRows
diff --git a/tests/system-test/2-query/concat_ws.py b/tests/system-test/2-query/concat_ws.py
index b2de96999f..2aa3e33b40 100644
--- a/tests/system-test/2-query/concat_ws.py
+++ b/tests/system-test/2-query/concat_ws.py
@@ -82,7 +82,7 @@ class TDTestCase:
 
             if num > 8 or num < 2 :
                 [tdSql.error(f"select concat_ws('_',  {','.join( condition ) })  from {tbname} {where_condition}  {group} ") for group in groups ]
-
+                return
 
             tdSql.query(f"select  {','.join(condition)}  from {tbname}  ")
             rows = tdSql.queryRows
diff --git a/tests/system-test/2-query/length.py b/tests/system-test/2-query/length.py
index 083bc62c9a..ed604c41ae 100644
--- a/tests/system-test/2-query/length.py
+++ b/tests/system-test/2-query/length.py
@@ -233,13 +233,13 @@ 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/2-query/lower.py b/tests/system-test/2-query/lower.py
index 5445c37b8a..d65a1df15d 100644
--- a/tests/system-test/2-query/lower.py
+++ b/tests/system-test/2-query/lower.py
@@ -59,12 +59,9 @@ class TDTestCase:
             groups = ["", group_having, group_no_having]
 
             for group_condition in groups:
-                tdSql.query(f"select {condition} from {tbname} {where_condition}  {group_condition} ")
-                datas = [tdSql.getData(i,0) for i in range(tdSql.queryRows)]
-                lower_data = [ str(data).lower()  if data else None for data in datas ]
-                tdSql.query(f"select lower( {condition} ) from {tbname} {where_condition}  {group_condition}")
-                for i in range(len(lower_data)):
-                    tdSql.checkData(i, 0, lower_data[i] ) if lower_data[i] else tdSql.checkData(i, 0, None)
+                tdSql.query(f"select lower( {condition} ), {condition} from {tbname} {where_condition}  {group_condition}")
+                for i in range(len(tdSql.queryRows)):
+                    tdSql.checkData(i, 0, str(tdSql.getData(i, 1)).lower() ) if tdSql.getData(i, 1) else tdSql.checkData(i, 0, None)
 
     def __lower_err_check(self,tbname):
         sqls = []
@@ -230,13 +227,13 @@ 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/2-query/upper.py b/tests/system-test/2-query/upper.py
index 3c3fddfb45..56ddf8cee7 100644
--- a/tests/system-test/2-query/upper.py
+++ b/tests/system-test/2-query/upper.py
@@ -59,12 +59,9 @@ class TDTestCase:
             groups = ["", group_having, group_no_having]
 
             for group_condition in groups:
-                tdSql.query(f"select {condition} from {tbname} {where_condition}  {group_condition} ")
-                datas = [tdSql.getData(i,0) for i in range(tdSql.queryRows)]
-                upper_data = [ str(data).upper()  if data else None for data in datas ]
-                tdSql.query(f"select upper( {condition} ) from {tbname} {where_condition}  {group_condition}")
-                for i in range(len(upper_data)):
-                    tdSql.checkData(i, 0, upper_data[i] ) if upper_data[i] else tdSql.checkData(i, 0, None)
+                tdSql.query(f"select upper( {condition} ), {condition} from {tbname} {where_condition}  {group_condition}")
+                for i in range(len(tdSql.queryRows)):
+                    tdSql.checkData(i, 0, str(tdSql.getData(i, 1)).upper() ) if tdSql.getData(i, 1) else tdSql.checkData(i, 0, None)
 
     def __upper_err_check(self,tbname):
         sqls = []
@@ -229,13 +226,13 @@ 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 4eef6a943f..ecec2ada63 100755
--- a/tests/system-test/fulltest.sh
+++ b/tests/system-test/fulltest.sh
@@ -13,6 +13,7 @@ python3 ./test.py -f 2-query/distinct.py
 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/timezone.py
 python3 ./test.py -f 2-query/Now.py