diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index b1cdf61fd3a7c00b006aa880643230c6ad84f60f..522ce678a16e26ca12340df91fd6ffc212bf0c3e 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -242,6 +242,7 @@ python3 ./test.py -f query/bug2143.py
 python3 ./test.py -f query/sliding.py
 python3 ./test.py -f query/unionAllTest.py
 python3 ./test.py -f query/bug2281.py
+python3 ./test.py -f query/udf.py
 python3 ./test.py -f query/bug2119.py
 python3 ./test.py -f query/isNullTest.py
 python3 ./test.py -f query/queryWithTaosdKilled.py
diff --git a/tests/pytest/query/udf.py b/tests/pytest/query/udf.py
new file mode 100644
index 0000000000000000000000000000000000000000..90881d1177bb3299fe0a1de0a3460a47aeda45fe
--- /dev/null
+++ b/tests/pytest/query/udf.py
@@ -0,0 +1,94 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+import os
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)        
+        tdSql.init(conn.cursor())
+
+        self.ts = 1627750800000
+        self.numberOfRecords = 10000
+
+    def pre_stable(self):
+        os.system("gcc -g -O0 -fPIC -shared ../script/sh/abs_max.c -o /tmp/abs_max.so")
+        os.system("gcc -g -O0 -fPIC -shared ../script/sh/add_one.c -o /tmp/add_one.so")
+        tdSql.execute("create table stb(ts timestamp ,c1 int, c2 bigint) tags(t1 int)") 
+        for i in range(50):
+            for j in range(200):
+                sql = "insert into t%d using stb tags(%d) values(%s,%d,%d)" % (i, i, self.ts + j, 1e2+j, 1e10+j)
+                tdSql.execute(sql)
+        for i in range(50):
+            for j in range(200):
+                sql = "insert into t%d using stb tags(%d) values(%s,%d,%d)" % (i, i, self.ts + j + 200 , -1e2-j, -j-1e10)
+                tdSql.execute(sql)
+    def test_udf_null(self):
+        tdLog.info("test missing parameters")
+        tdSql.error("create aggregate function  as '/tmp/abs_maxw.so' outputtype bigint;")
+        tdSql.error("create aggregate function abs_max as '' outputtype bigint;")
+        tdSql.error("create aggregate function abs_max as  outputtype bigint;")
+        tdSql.error("create aggregate function abs_max as '/tmp/abs_maxw.so' ;")
+        tdSql.error("create aggregate  abs_max as '/tmp/abs_maxw.so' outputtype bigint;")
+        tdSql.execute("create aggregate function abs_max as '/tmp/abs_max.so' outputtype bigint;") 
+        tdSql.error("select abs_max() from stb")
+        tdSql.error("select abs_max(c2) from ")
+        tdSql.execute("drop function abs_max")
+
+    def test_udf_format(self):
+        # tdSql.error("create aggregate function avg as '/tmp/abs_max.so' outputtype bigint;")
+        tdSql.error("create aggregate function .a as '/tmp/abs_max.so' outputtype bigint;")
+        tdSql.error("create aggregate function .11 as '/tmp/abs_max.so' outputtype bigint;")
+        tdSql.error("create aggregate function 1a as '/tmp/abs_max.so' outputtype bigint;")
+        tdSql.error("create aggregate function \"1+1\" as '/tmp/abs_max.so' outputtype bigint;")
+        # tdSql.error("create aggregate function [avg] as '/tmp/abs_max.so' outputtype bigint;")
+        tdSql.execute("create aggregate function abs_max as '/tmp/abs_max.so' outputtype bigint;")
+        # tdSql.error("create aggregate function abs_max2 as '/tmp/abs_max.so' outputtype bigint;")
+        tdSql.execute("drop function abs_max;")
+        tdSql.error("create aggregate function abs_max as '/tmp/add_onew.so' outputtype bigint;")
+
+    def test_udf_test(self):
+        tdSql.execute("create aggregate function abs_max as '/tmp/abs_max.so' outputtype bigint;")
+        tdSql.error("create aggregate function abs_max as '/tmp/add_onew.so' outputtype bigint;")
+        sql = 'select abs_max() from db.stb'
+        tdSql.error(sql)
+        sql = 'select abs_max(c2) from db.stb'
+        tdSql.query(sql)
+        tdSql.checkData(0,0,1410065607)
+
+    def run(self):
+        tdSql.prepare()
+
+        tdLog.info("==============step1")
+        self.pre_stable()       
+        tdLog.info("==============step2")
+        self.test_udf_null()
+        tdLog.info("==============step3")
+        self.test_udf_format()
+        tdLog.info("==============step4")
+        self.test_udf_test()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())