diff --git a/tests/system-test/2-query/join.py b/tests/system-test/2-query/join.py
index 2ec74ada21..ee946c133c 100644
--- a/tests/system-test/2-query/join.py
+++ b/tests/system-test/2-query/join.py
@@ -40,8 +40,6 @@ class TDTestCase:
                 )
             )
             query_condition.extend( f"cast( {tbname}.{un_char_col} as binary(16) ) " for un_char_col in NUM_COL)
-            query_condition.extend( f"cast( {tbname}.{char_col} + {tbname}.{char_col_2} as binary(32) ) " for char_col_2 in CHAR_COL )
-            query_condition.extend( f"cast( {tbname}.{char_col} + {tbname}.{un_char_col} as binary(32) ) " for un_char_col in NUM_COL )
         for num_col in NUM_COL:
             query_condition.extend(
                 (
@@ -64,19 +62,6 @@ class TDTestCase:
 
         return join_condition
 
-    # def __join_condition(self, tb_list, filter=PRIMARY_COL):
-    #     # sourcery skip: flip-comparison
-    #     if 1 == len(tb_list):
-    #         join_filter = f"{tb_list[0]}.{filter} = {tb_list[0]}.{filter} "
-    #     elif 2 == len(tb_list):
-    #         join_filter = f"{tb_list[0]}.{filter} = {tb_list[1]}.{filter} "
-    #     else:
-    #         join_filter = f"{tb_list[0]}.{filter} = {tb_list[1]}.{filter} "
-    #         for i in range(1, len(tb_list)-1 ):
-    #             join_filter += f"and {tb_list[i]}.{filter} = {tb_list[i+1]}.{filter}"
-
-    #     return join_filter
-
     def __where_condition(self, col=None, tbname=None, query_conditon=None):
         if query_conditon and isinstance(query_conditon, str):
             if query_conditon.startswith("count"):
@@ -202,23 +187,6 @@ class TDTestCase:
         tdSql.query(sql=sql)
         # tdSql.checkRows(checkrows)
 
-
-    def __test_current(self):
-        # sourcery skip: extract-duplicate-method, inline-immediately-returned-variable
-        tdLog.printNoPrefix("==========current sql condition check , must return query ok==========")
-        tblist_1 = ["ct1", "ct2"]
-        self.__join_check(tblist_1, 1)
-        tdLog.printNoPrefix(f"==========current sql condition check in {tblist_1} over==========")
-        tblist_2 = ["ct2", "ct4"]
-        self.__join_check(tblist_2, self.rows)
-        tdLog.printNoPrefix(f"==========current sql condition check in {tblist_2} over==========")
-        tblist_3 = ["t1", "ct4"]
-        self.__join_check(tblist_3, 1)
-        tdLog.printNoPrefix(f"==========current sql condition check in {tblist_3} over==========")
-        tblist_4 = ["t1", "ct1"]
-        self.__join_check(tblist_4, 1)
-        tdLog.printNoPrefix(f"==========current sql condition check in {tblist_4} over==========")
-
     def __test_error(self):
         # sourcery skip: extract-duplicate-method, move-assign-in-block
         tdLog.printNoPrefix("==========err sql condition check , must return error==========")
diff --git a/tests/system-test/2-query/union.py b/tests/system-test/2-query/union.py
index 0d35f2bff3..547721c102 100644
--- a/tests/system-test/2-query/union.py
+++ b/tests/system-test/2-query/union.py
@@ -35,7 +35,6 @@ class TDTestCase:
         for char_col in CHAR_COL:
             query_condition.extend(
                 (
-                    f"rtrim( {tbname}.{char_col} )",
                     f"substr( {tbname}.{char_col}, 1 )",
                     f"count( {tbname}.{char_col} )",
                     f"cast( {tbname}.{char_col} as nchar(3) )",
@@ -46,10 +45,8 @@ class TDTestCase:
             query_condition.extend(
                 (
                     f"{tbname}.{num_col}",
-                    f"floor( {tbname}.{num_col} )",
                     f"log( {tbname}.{num_col},  {tbname}.{num_col})",
                     f"sin( {tbname}.{num_col} )",
-                    f"sqrt( {tbname}.{num_col} )",
                 )
             )