fix: add test case

tests/parallel_test/cases.task

@@ -35,6 +35,7 @@
 #,,n,system-test,python3 ./test.py -f 8-stream/snode_restart.py -N 4
 #,,n,system-test,python3 ./test.py -f 8-stream/snode_restart_with_checkpoint.py -N 4
 
+,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/project_group.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/tbname_vgroup.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/compact-col.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/stbJoin.py

tests/system-test/2-query/project_group.py

@@ -0,0 +1,65 @@
+from wsgiref.headers import tspecials
+from util.log import *
+from util.cases import *
+from util.sql import *
+import numpy as np
+
+
+class TDTestCase:
+    def init(self, conn, logSql, replicaVar=1):
+        self.replicaVar = int(replicaVar)
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor())
+
+        self.rowNum = 10
+        self.batchNum = 5
+        self.ts = 1537146000000
+
+    def run(self):
+        dbname = "db"
+        tdSql.prepare()
+
+        tdSql.execute(f'''create table sta(ts timestamp, col1 int, col2 bigint) tags(tg1 int, tg2 binary(20))''')
+        tdSql.execute(f"create table sta1 using sta tags(1, 'a')")
+        tdSql.execute(f"create table sta2 using sta tags(2, 'b')")
+        tdSql.execute(f"create table sta3 using sta tags(3, 'c')")
+        tdSql.execute(f"create table sta4 using sta tags(4, 'a')")
+        tdSql.execute(f"insert into sta1 values(1537146000001, 11, 110)")
+        tdSql.execute(f"insert into sta1 values(1537146000002, 12, 120)")
+        tdSql.execute(f"insert into sta1 values(1537146000003, 13, 130)")
+        tdSql.execute(f"insert into sta2 values(1537146000001, 21, 210)")
+        tdSql.execute(f"insert into sta2 values(1537146000002, 22, 220)")
+        tdSql.execute(f"insert into sta2 values(1537146000003, 23, 230)")
+        tdSql.execute(f"insert into sta3 values(1537146000001, 31, 310)")
+        tdSql.execute(f"insert into sta3 values(1537146000002, 32, 320)")
+        tdSql.execute(f"insert into sta3 values(1537146000003, 33, 330)")
+        tdSql.execute(f"insert into sta4 values(1537146000001, 41, 410)")
+        tdSql.execute(f"insert into sta4 values(1537146000002, 42, 420)")
+        tdSql.execute(f"insert into sta4 values(1537146000003, 43, 430)")
+
+        tdSql.execute(f'''create table stb(ts timestamp, col1 int, col2 bigint) tags(tg1 int, tg2 binary(20))''')
+        tdSql.execute(f"create table stb1 using stb tags(1, 'a')")
+        tdSql.execute(f"create table stb2 using stb tags(2, 'b')")
+        tdSql.execute(f"create table stb3 using stb tags(3, 'c')")
+        tdSql.execute(f"create table stb4 using stb tags(4, 'a')")
+        tdSql.execute(f"insert into stb1 values(1537146000001, 911, 9110)")
+        tdSql.execute(f"insert into stb1 values(1537146000002, 912, 9120)")
+        tdSql.execute(f"insert into stb1 values(1537146000003, 913, 9130)")
+        tdSql.execute(f"insert into stb2 values(1537146000001, 921, 9210)")
+        tdSql.execute(f"insert into stb2 values(1537146000002, 922, 9220)")
+        tdSql.execute(f"insert into stb2 values(1537146000003, 923, 9230)")
+        tdSql.execute(f"insert into stb3 values(1537146000001, 931, 9310)")
+        tdSql.execute(f"insert into stb3 values(1537146000002, 932, 9320)")
+        tdSql.execute(f"insert into stb3 values(1537146000003, 933, 9330)")
+        tdSql.execute(f"insert into stb4 values(1537146000001, 941, 9410)")
+        tdSql.execute(f"insert into stb4 values(1537146000002, 942, 9420)")
+        tdSql.execute(f"insert into stb4 values(1537146000003, 943, 9430)")
+
+        tdSql.query("select * from (select ts, col1 from sta partition by tbname) limit 2");
+        tdSql.checkRows(2)
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())