diff --git a/tests/system-test/2-query/ltrim.py b/tests/system-test/2-query/ltrim.py
index af49811a29dfd85ef8bcf9f4a394281614537316..ef3fd3de21890d6fc6494fe79081bee39035ab97 100644
--- a/tests/system-test/2-query/ltrim.py
+++ b/tests/system-test/2-query/ltrim.py
@@ -45,7 +45,7 @@ class TDTestCase:
             ltrim_condition.extend( f"cast( {bool_col} as binary(16) )" for bool_col in BOOLEAN_COL )
             ltrim_condition.extend( f"cast( {char_col} + {bool_col} as binary(16) )" for bool_col in BOOLEAN_COL )
             ltrim_condition.extend( f"cast( {ts_col} as binary(16) )" for ts_col in TS_TYPE_COL )
-            ltrim_condition.extend( f"cast( {char_col} + {ts_col} as binary(16) )" for ts_col in TS_TYPE_COL )
+            # ltrim_condition.extend( f"cast( {char_col} + {ts_col} as binary(16) )" for ts_col in TS_TYPE_COL )
             ltrim_condition.extend( f"cast( {char_col} + {char_col_2} as binary(16) ) " for char_col_2 in CHAR_COL )
             ltrim_condition.extend( f"concat( {char_col}, {char_col_2} ) " for char_col_2 in CHAR_COL )
 
@@ -76,7 +76,7 @@ class TDTestCase:
 
             tdSql.query(f"select ltrim( {condition}) , {condition} from {tbname} ")
             for j in range(tdSql.queryRows):
-                tdSql.checkData(j,0, tdSql.getData(j,1).lstrip())
+                tdSql.checkData(j,0, tdSql.getData(j,1).lstrip()) if tdSql.getData(j,1) else tdSql.checkData(j, 0, None)
 
             [ tdSql.query(f"select ltrim({condition})  from {tbname} {where_condition}  {group} ") for group in groups ]
 
@@ -125,7 +125,7 @@ class TDTestCase:
         tbname = ["ct1", "ct2", "ct4", "t1", "stb1"]
         for tb in tbname:
             self.__ltrim_check(tb)
-            tdLog.printNoPrefix(f"==========current sql condition check in {tb}, col num: {i} over==========")
+            tdLog.printNoPrefix(f"==========current sql condition check in {tb} over==========")
 
     def __test_error(self):
         tdLog.printNoPrefix("==========err sql condition check , must return error==========")
diff --git a/tests/system-test/2-query/rtrim.py b/tests/system-test/2-query/rtrim.py
index 3cced8dbdbc1aba87e41c3642f630879282005d9..f99145b7b11b555163fbf57893d1731ffed5b9e7 100644
--- a/tests/system-test/2-query/rtrim.py
+++ b/tests/system-test/2-query/rtrim.py
@@ -51,7 +51,7 @@ class TDTestCase:
 
         for num_col in NUM_COL:
             rtrim_condition.extend( f"cast( {num_col} + {bool_col} as binary(16) )" for bool_col in BOOLEAN_COL )
-            rtrim_condition.extend( f"cast( {num_col} + {ts_col} as binary(16) )" for ts_col in TS_TYPE_COL )
+            rtrim_condition.extend( f"cast( {num_col} + {ts_col} as binary(16) )" for ts_col in TS_TYPE_COL if num_col is not FLOAT_COL and num_col is not DOUBLE_COL )
 
         rtrim_condition.extend( f"cast( {bool_col} + {ts_col} as binary(16) )" for bool_col in BOOLEAN_COL for ts_col in TS_TYPE_COL )
 
@@ -76,7 +76,7 @@ class TDTestCase:
 
             tdSql.query(f"select rtrim( {condition}) , {condition} from {tbname} ")
             for j in range(tdSql.queryRows):
-                tdSql.checkData(j,0, tdSql.getData(j,1).rstrip())
+                tdSql.checkData(j,0, tdSql.getData(j,1).rstrip()) if tdSql.getData(j,1) else tdSql.checkData(j, 0, None)
 
             [ tdSql.query(f"select rtrim({condition})  from {tbname} {where_condition}  {group} ") for group in groups ]
 
@@ -125,7 +125,7 @@ class TDTestCase:
         tbname = ["ct1", "ct2", "ct4", "t1", "stb1"]
         for tb in tbname:
             self.__rtrim_check(tb)
-            tdLog.printNoPrefix(f"==========current sql condition check in {tb}, col num: {i} over==========")
+            tdLog.printNoPrefix(f"==========current sql condition check in {tb} over==========")
 
     def __test_error(self):
         tdLog.printNoPrefix("==========err sql condition check , must return error==========")
diff --git a/tests/system-test/2-query/substr.py b/tests/system-test/2-query/substr.py
index 5fed3762e829dffa7d0a7bf6bbad086fc98747e5..1b3b5895f4c6fb0385fd32eaca944d11475799d6 100644
--- a/tests/system-test/2-query/substr.py
+++ b/tests/system-test/2-query/substr.py
@@ -51,7 +51,7 @@ class TDTestCase:
 
         for num_col in NUM_COL:
             substr_condition.extend( f"cast( {num_col} + {bool_col} as binary(16) )" for bool_col in BOOLEAN_COL )
-            substr_condition.extend( f"cast( {num_col} + {ts_col} as binary(16) )" for ts_col in TS_TYPE_COL )
+            substr_condition.extend( f"cast( {num_col} + {ts_col} as binary(16) )" for ts_col in TS_TYPE_COL if num_col is not FLOAT_COL and num_col is not DOUBLE_COL)
 
         substr_condition.extend( f"cast( {bool_col} + {ts_col} as binary(16) )" for bool_col in BOOLEAN_COL for ts_col in TS_TYPE_COL )