few variables need reset after prepare called.

tests/pytest/query/filter.py

@@ -87,7 +87,7 @@ class TDTestCase:
 
         # <> for timestamp type
         tdSql.query("select * from db.st where ts <> '2020-05-13 10:00:00.002'")
-        #tdSql.checkRows(4)
+        # tdSql.checkRows(4)
 
         # <> for numeric type
         tdSql.query("select * from db.st where tagtype <> 2")
@@ -96,7 +96,7 @@ class TDTestCase:
         # <> for nchar type
         tdSql.query("select * from db.st where name <> 'first'")
         tdSql.checkRows(4)
-        
+
         # % for nchar type
         tdSql.query("select * from db.st where name like 'fi%'")
         tdSql.checkRows(2)

tests/pytest/query/filterCombo.py

@@ -42,14 +42,17 @@ class TDTestCase:
             ('2020-05-13 10:00:00.005', 3, 'third')""")
 
         # query with filter condition A OR condition B
-        tdSql.query("select * from db.st where ts > '2020-05-13 10:00:00.002' AND tagtype < 2")
+        tdSql.query(
+            "select * from db.st where ts > '2020-05-13 10:00:00.002' AND tagtype < 2")
         tdSql.checkRows(1)
 
         # query with filter condition A OR condition B, error expected
-        tdSql.error("select * from db.st where ts > '2020-05-13 10:00:00.002' OR tagtype < 2")
+        tdSql.error(
+            "select * from db.st where ts > '2020-05-13 10:00:00.002' OR tagtype < 2")
 
         # illegal condition
-        tdSql.error("select * from db.st where ts != '2020-05-13 10:00:00.002' OR tagtype < 2")        
+        tdSql.error(
+            "select * from db.st where ts != '2020-05-13 10:00:00.002' OR tagtype < 2")
         tdSql.error("select * from db.st where tagtype <> 1 OR tagtype < 2")
 
     def stop(self):

tests/pytest/query/queryError.py

@@ -41,18 +41,17 @@ class TDTestCase:
             ('2020-05-13 10:00:00.002', 3, 'third') dev_002 VALUES('2020-05-13 10:00:00.003', 1, 'first'), ('2020-05-13 10:00:00.004', 2, 'second'),
             ('2020-05-13 10:00:00.005', 3, 'third')""")
 
-        
         # query first .. as ..
-        tdSql.error("select first(*) as one from st")    
+        tdSql.error("select first(*) as one from st")
 
         # query last .. as ..
-        tdSql.error("select last(*) as latest from st")        
+        tdSql.error("select last(*) as latest from st")
 
         # query last row .. as ..
-        tdSql.error("select last_row as latest from st") 
+        tdSql.error("select last_row as latest from st")
 
         # query distinct on normal colnum
-        tdSql.error("select distinct tagtype from st")     
+        tdSql.error("select distinct tagtype from st")
 
         # query .. order by non-time field
         tdSql.error("select * from st order by name")

tests/pytest/query/queryNormal.py

@@ -28,17 +28,20 @@ class TDTestCase:
 
         print("==============step1")
 
-        tdSql.execute("create table stb1 (ts timestamp, c1 int, c2 float) tags(t1 int, t2 binary(10), t3 nchar(10))")
-        tdSql.execute("insert into tb1 using stb1 tags(1,'tb1', '表1') values ('2020-04-18 15:00:00.000', 1, 0.1), ('2020-04-18 15:00:01.000', 2, 0.1)")
-        tdSql.execute("insert into tb2 using stb1 tags(2,'tb2', '表2') values ('2020-04-18 15:00:02.000', 3, 2.1), ('2020-04-18 15:00:03.000', 4, 2.2)")        
-        
-        # inner join --- bug 
+        tdSql.execute(
+            "create table stb1 (ts timestamp, c1 int, c2 float) tags(t1 int, t2 binary(10), t3 nchar(10))")
+        tdSql.execute(
+            "insert into tb1 using stb1 tags(1,'tb1', '表1') values ('2020-04-18 15:00:00.000', 1, 0.1), ('2020-04-18 15:00:01.000', 2, 0.1)")
+        tdSql.execute(
+            "insert into tb2 using stb1 tags(2,'tb2', '表2') values ('2020-04-18 15:00:02.000', 3, 2.1), ('2020-04-18 15:00:03.000', 4, 2.2)")
+
+        # inner join --- bug
         tdSql.query("select * from tb1 a, tb2 b where a.ts = b.ts")
         tdSql.checkRows(1)
 
         # join 3 tables -- bug exists
         tdSql.query("select stb_t.ts, stb_t.dscrption, stb_t.temperature, stb_p.id, stb_p.dscrption, stb_p.pressure,stb_v.velocity from stb_p, stb_t, stb_v where stb_p.ts=stb_t.ts and stb_p.ts=stb_v.ts and stb_p.id = stb_t.id")
-        
+
         # query show stable
         tdSql.query("show stables")
         tdSql.checkRows(1)
@@ -51,15 +54,15 @@ class TDTestCase:
         tdSql.query("select count(*) from stb1")
         tdSql.checkData(0, 0, 4)
 
-        # query first 
+        # query first
         tdSql.query("select first(*) from stb1")
         tdSql.checkData(0, 1, 1)
-        
-        # query last 
+
+        # query last
         tdSql.query("select last(*) from stb1")
         tdSql.checkData(0, 1, 4)
 
-        # query last_row 
+        # query last_row
         tdSql.query("select last_row(*) from stb1")
         tdSql.checkData(0, 1, 4)
 
@@ -70,7 +73,7 @@ class TDTestCase:
         # query first ... as
         tdSql.query("select first(*) as begin from stb1")
         tdSql.checkData(0, 1, 1)
-        
+
         # query last ... as
         tdSql.query("select last(*) as end from stb1")
         tdSql.checkData(0, 1, 4)
@@ -93,7 +96,7 @@ class TDTestCase:
 
         # query ... alias for table ---- bug
         tdSql.query("select t.ts from tb1 t")
-        tdSql.checkRows(2)       
+        tdSql.checkRows(2)
 
         # query ... tbname
         tdSql.query("select tbname from stb1")

tests/pytest/random-test/random-test-multi-threading-3.py

@@ -111,7 +111,6 @@ class Test (threading.Thread):
                 last_tb)
             written = written + 1
 
-
     def drop_stable(self):
         tdLog.info("drop_stable")
         global last_stb
@@ -152,7 +151,6 @@ class Test (threading.Thread):
                 last_tb = ""
                 written = 0
 
-
     def query_data_from_stable(self):
         tdLog.info("query_data_from_stable")
         global last_stb
@@ -164,7 +162,6 @@ class Test (threading.Thread):
             tdLog.info("will query data from super table")
             tdSql.execute('select * from %s' % last_stb)
 
-
     def reset_query_cache(self):
         tdLog.info("reset_query_cache")
         global last_tb
@@ -232,7 +229,7 @@ class Test (threading.Thread):
                 self.threadLock.acquire()
                 tdLog.notice("first thread")
                 randDataOp = random.randint(1, 3)
-                dataOp.get(randDataOp , lambda: "ERROR")()
+                dataOp.get(randDataOp, lambda: "ERROR")()
                 self.threadLock.release()
 
         elif (self.threadId == 2):

tests/pytest/random-test/random-test-multi-threading.py

@@ -111,7 +111,6 @@ class Test (threading.Thread):
                 last_tb)
             written = written + 1
 
-
     def drop_stable(self):
         tdLog.info("drop_stable")
         global last_stb
@@ -154,7 +153,6 @@ class Test (threading.Thread):
                 last_tb = ""
                 written = 0
 
-
     def query_data_from_stable(self):
         tdLog.info("query_data_from_stable")
         global last_stb
@@ -166,7 +164,6 @@ class Test (threading.Thread):
             tdLog.info("will query data from super table")
             tdSql.execute('select * from %s' % last_stb)
 
-
     def reset_query_cache(self):
         tdLog.info("reset_query_cache")
         global last_tb
@@ -230,7 +227,7 @@ class Test (threading.Thread):
                 self.threadLock.acquire()
                 tdLog.notice("first thread")
                 randDataOp = random.randint(1, 3)
-                dataOp.get(randDataOp , lambda: "ERROR")()
+                dataOp.get(randDataOp, lambda: "ERROR")()
                 self.threadLock.release()
 
         elif (self.threadId == 2):

tests/pytest/random-test/random-test.py

@@ -112,7 +112,6 @@ class Test:
             tdSql.execute('drop table %s' % self.last_stb)
             self.last_stb = ""
 
-
     def query_data_from_stable(self):
         tdLog.info("query_data_from_stable")
         if (self.last_stb == ""):
@@ -122,20 +121,21 @@ class Test:
             tdLog.info("will query data from super table")
             tdSql.execute('select * from %s' % self.last_stb)
 
-
     def restart_database(self):
         tdLog.info("restart_databae")
         tdDnodes.stop(1)
         tdDnodes.start(1)
         tdLog.sleep(5)
 
-
     def force_restart_database(self):
         tdLog.info("force_restart_database")
         tdDnodes.forcestop(1)
         tdDnodes.start(1)
         tdLog.sleep(5)
         tdSql.prepare()
+        self.last_tb = ""
+        self.last_stb = ""
+        self.written = 0
 
     def drop_table(self):
         tdLog.info("drop_table")
@@ -159,6 +159,9 @@ class Test:
         tdDnodes.start(1)
         tdLog.sleep(5)
         tdSql.prepare()
+        self.last_tb = ""
+        self.last_stb = ""
+        self.written = 0
 
     def delete_datafiles(self):
         tdLog.info("delete_datafiles")
@@ -173,6 +176,9 @@ class Test:
         tdDnodes.start(1)
         tdLog.sleep(10)
         tdSql.prepare()
+        self.last_tb = ""
+        self.last_stb = ""
+        self.written = 0
 
 
 class TDTestCase: