[TD-2298] <test> add test case for interval

tests/pytest/fulltest.sh

@@ -160,6 +160,7 @@ python3 ./test.py -f query/bug1874.py
 python3 ./test.py -f query/bug1875.py
 python3 ./test.py -f query/bug1876.py
 python3 ./test.py -f query/bug2218.py
+python3 ./test.py -f query/sliding.py 
 
 #stream
 python3 ./test.py -f stream/metric_1.py

tests/pytest/query/queryInterval.py

@@ -16,6 +16,7 @@ import taos
 from util.log import tdLog
 from util.cases import tdCases
 from util.sql import tdSql
+from util.dnodes import tdDnodes
 
 
 class TDTestCase:
@@ -72,6 +73,19 @@ class TDTestCase:
         tdSql.checkData(6, 0, "2020-09-16 00:00:00")
         tdSql.checkData(6, 1, 222.0)
 
+        # test case for https://jira.taosdata.com:18080/browse/TD-2298
+        tdSql.execute("create database test keep 36500")
+        tdSql.execute("use test")
+        tdSql.execute("create table t (ts timestamp, voltage int)")
+        for i in range(10000):
+            tdSql.execute("insert into t values(%d, 0)" % (1000000 + i * 6000))
+        
+        tdDnodes.stop(1)
+        tdDnodes.start(1)
+        tdSql.query("select last(*) from t interval(1s)")
+        tdSql.checkRows(10000)
+        
+
     def stop(self):
         tdSql.close()
         tdLog.success("%s successfully executed" % __file__)