diff --git a/tests/system-test/0-others/udfpy/af_count.py b/tests/system-test/0-others/udfpy/af_count.py
index 226e02235ffebae116f245af79a57cc977853641..ce29abca13866f9f311d1e868a5df68c71c5f735 100644
--- a/tests/system-test/0-others/udfpy/af_count.py
+++ b/tests/system-test/0-others/udfpy/af_count.py
@@ -1,3 +1,5 @@
+import pickle
+
 def init():
     pass
 
diff --git a/tests/system-test/0-others/udfpy/af_sum.py b/tests/system-test/0-others/udfpy/af_sum.py
index ac7aa1692424eba8aac4f85c1190de17b01ba8ef..8b88aba56ca08f64249f85a4df596d9fd204b05a 100644
--- a/tests/system-test/0-others/udfpy/af_sum.py
+++ b/tests/system-test/0-others/udfpy/af_sum.py
@@ -7,30 +7,20 @@ def destroy():
     pass
 
 def start():
-    return pickle.dumps([])
+    return pickle.dumps(None)
 
 def finish(buf):
-    sums = pickle.loads(buf)
-    all = None
-    for sum in sums:
-        if all is None:
-            all = sum
-        else:
-            all += sum
-    return all
+    sum = pickle.loads(buf)
+    return sum
 
 def reduce(datablock, buf):
     (rows, cols) = datablock.shape()
-    sums = pickle.loads(buf)
-    sum = None
+    sum = pickle.loads(buf)
     for i in range(rows):
         val = datablock.data(i, 0)
         if val is not None:
            if sum is None:
                sum = val
            else:
-               sum += val
-               
-    if sum is not None:
-        sums.append(sum)
-    return pickle.dumps(sums) 
+               sum += val               
+    return pickle.dumps(sum) 
diff --git a/tests/system-test/0-others/udfpy_main.py b/tests/system-test/0-others/udfpy_main.py
index eaadfbdbd68cadef3c35a883f702cffa0c612228..e76795ac28004efa19d4c3997c748cd3fde896f4 100644
--- a/tests/system-test/0-others/udfpy_main.py
+++ b/tests/system-test/0-others/udfpy_main.py
@@ -209,12 +209,12 @@ class TDTestCase:
                 tdSql.checkData(i, j, result1[i][j])
 
     # same value like select col1, udf_fun1(col1) from st
-    def verify_same_value(self, sql):
+    def verify_same_value(self, sql, col=0):
         tdSql.query(sql)
         nrows = tdSql.getRows()
         for i in range(nrows):
-            val = tdSql.getData(i, 0)
-            tdSql.checkData(i, 1, val)
+            val = tdSql.getData(i, col)
+            tdSql.checkData(i, col + 1, val)
 
     # verify multi values
     def verify_same_multi_values(self, sql):
@@ -395,6 +395,24 @@ class TDTestCase:
         tdSql.execute(sql)
         tdLog.info(f" insert {rows} to child table {self.child_count} .")
 
+   
+    # create stream
+    def create_stream(self):
+        sql = f"create stream ma  into sta subtable(concat('sta_',tbname)) \
+            as select _wstart,count(col1),af_count_bigint(col1) from {self.stbname} partition by tbname interval(1s);"
+        tdSql.execute(sql)
+        tdLog.info(sql)
+
+    #  query stream
+    def verify_stream(self):
+        sql = f"select * from sta limit 10"
+        self.verify_same_value(sql, 1)
+
+    # create tmq
+    def create_tmq(self):
+        sql = f"create topic topa as select concat(col12,t12),sf_concat_var(col12,t12) from {self.stbname};"   
+        tdSql.execute(sql)
+        tdLog.info(sql)
 
     # run
     def run(self):
@@ -402,14 +420,23 @@ class TDTestCase:
         stable = "meters"
         tbname = "d"
         count = 10
-        rows =  50000
+        rows =  5000
         # do 
         self.create_table(stable, tbname, count)
-        self.insert_data(tbname, rows)
 
         # create
         self.create_scalar_udfpy()
         self.create_aggr_udfpy()
+
+        # create stream
+        self.create_stream()
+
+        # create tmq
+        self.create_tmq()
+
+        # insert data
+        self.insert_data(tbname, rows)
+
         # query
         self.query_scalar_udfpy()
         self.query_aggr_udfpy()