Merge pull request #9071 from taosdata/TD-11389_test_case

[TD-11389]<test> add test case for TD-11389, an bug about cache 

tests/system-test/2-query/9-others/TD-11389.py

+###################################################################
+#           Copyright (c) 2020 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 -*-
+
+from posixpath import split
+import sys
+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(), logSql)
+        
+        self.ts = 1420041600000 # 2015-01-01 00:00:00  this is begin time for first record
+        self.num = 10
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/build/bin")]
+                    break
+        return buildPath
+
+
+    def caseDescription(self):
+
+        '''
+        case1 <wenzhouwww>: [TD-11389] : 
+            this test case is an test case for cache error , it will let  the cached data obtained by the client that has connected to taosd incorrect，
+            root cause : table schema is changed, tag hostname size is increased through schema-less insertion. The schema cache of client taos is not refreshed.
+
+        ''' 
+        return 
+
+   
+    def run(self):
+        tdSql.prepare()
+        tdSql.execute("create database if not exists testdb keep 36500;")
+        tdSql.execute("use testdb;")
+        tdSql.execute("create stable st (ts timestamp , id int , value double) tags(hostname binary(10) ,ind int);")
+        for i in range(self.num):
+            tdSql.execute("insert into sub_%s using st tags('host_%s' , %d) values (%d , %d , %f );"%(str(i),str(i),i*10,self.ts+10000*i,i*2,i+10.00))
+        tdSql.query("select distinct(hostname) from st;")
+        tdSql.checkRows(10)
+
+        binPath = self.getBuildPath() + "/build/bin/"
+        os.system( "taos -s ' ALTER STABLE testdb.st MODIFY TAG hostname binary(100); '" )
+        os.system("taos -s ' insert into testdb.sub_test using testdb.st tags(\"host_10000000000000000000\" , 100) values (now , 100 , 100.0 ); '")
+        
+    
+        tdLog.info (" ===============The correct result should be 11 rows ,there is error query result ====================")
+
+        os.system("taos -s ' select distinct(hostname) from testdb.st '")
+
+        # this bug will occor at this connect  ,it should get 11 rows ,but return 10 rows ,this error is caused by cache 
+
+        for i in range(10):
+            
+            tdSql.checkRows(11)     # query 10 times every 10 second , test cache refresh
+            sleep(10)              
+    
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
+
+

tests/system-test/fulltest.sh

 python3 test.py -f 1-insert/0-sql/basic.py 
 python3 test.py -f 0-management/1-stable/create_col_tag.py 
+
+#python3 test.py -f 2-query/9-others/TD-11389.py # this case will run when this bug fix  TD-11389
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