diff --git a/sql/engines/tests.py b/sql/engines/tests.py
index 50939b2d2a..68c5d41e4a 100644
--- a/sql/engines/tests.py
+++ b/sql/engines/tests.py
@@ -191,7 +191,14 @@ def test_filter_sql(self):
         banned_sql = "select user from user_table"
         check_result = new_engine.filter_sql(sql=banned_sql, limit_num=10)
         self.assertEqual(check_result, "select top 10 user from user_table")
-
+        
+    def test_filter_sql_with_distinct(self):
+        new_engine = MssqlEngine(instance=self.ins1)
+        # 只抽查一个函数
+        banned_sql = "select distinct * from user_table"
+        check_result = new_engine.filter_sql(sql=banned_sql, limit_num=10)
+        self.assertEqual(check_result, "select distinct top 10 user from user_table")
+        
     def test_execute_check(self):
         new_engine = MssqlEngine(instance=self.ins1)
         test_sql = (