diff --git a/tests/parallel_test/cases.task b/tests/parallel_test/cases.task
index f399b64edf9d721383116fb58b6dadf673dc3dac..a570fb8ef94ad818f4af571b8060218833137a38 100644
--- a/tests/parallel_test/cases.task
+++ b/tests/parallel_test/cases.task
@@ -816,6 +816,7 @@
 3,,pytest,python3 test.py -f table/tbNameCaseSensitive.py
 3,,pytest,python3 test.py -f functions/function_max_row.py
 3,,pytest,python3 test.py -f functions/function_min_row.py
+3,,pytest,python3 test.py -f insert/long_string.py
 3,,develop-test,python3 ./test.py -f 2-query/ts_hidden_column.py
 3,,develop-test,python3 ./test.py -f 2-query/ts_shortcut.py
 3,,develop-test,python3 ./test.py -f 2-query/nchar_funcs.py
diff --git a/tests/pytest/insert/long_string.py b/tests/pytest/insert/long_string.py
new file mode 100644
index 0000000000000000000000000000000000000000..4dea5cf7e912dd0a7b3fe8056a06bc445049614d
--- /dev/null
+++ b/tests/pytest/insert/long_string.py
@@ -0,0 +1,76 @@
+###################################################################
+#           Copyright (c) 2021 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
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.types import TDSmlProtocolType, TDSmlTimestampType
+import random
+import string
+
+class TDTestCase:
+    updatecfgDict={'maxSQLLength':1048576}
+
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+        self.tables = 10
+        self.rows = 10
+        self.ts = 1667235600000
+        self.str_prefix = "test"     
+
+    def generate_string(self, length):
+        chars = string.ascii_uppercase + string.ascii_lowercase
+        v = ""
+        for i in range(length):
+            v += random.choice(chars)
+        return v
+    
+    def prepare_data(self):
+        tdSql.prepare()
+        str = self.str_prefix + self.generate_string(65505)
+        tdSql.execute("create table stb1(ts timestamp, c1 int, c2 float, c3 binary(%d)) tags(t1 int)" % len(str))
+        for i in range(self.tables):
+            tdSql.execute("create table tb%d using stb1 tags(%d)" % (i, i))
+            sql = "insert into tb%d values" % i
+            for j in range(self.rows):
+                sql += "(%d, %d, %f, '%s')" % (self.ts + j, random.randint(1, 1000), random.uniform(0, 10), str)
+            tdSql.execute(sql)
+
+    def query_check(self):
+        tdSql.query("select * from stb1 limit 1")
+        tdSql.checkRows(1)
+        
+        tdSql.query("select count(*) from stb1 where c3 like 'test%'")
+        tdSql.checkData(0, 0, 100)
+
+        tdSql.query("select count(*) from stb1 where c3 like '__st%'")
+        tdSql.checkData(0, 0, 100)
+
+    def boundry_check(self):
+        tdSql.error("create table stb2(ts timestamp, c1 int, c2 float, c3 binary(65510)) tags(t1 int)")
+        tdSql.error("create table stb3(ts timestamp, c1 int, c2 float, c3 nchar(16378)) tags(t1 int)")
+
+    def run(self):        
+        self.prepare_data()
+        self.query_check()
+        self.boundry_check()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())