test: refine query cases

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

@@ -851,6 +851,7 @@ class TDTestCase:
         tdLog.info("========mark==%s==="% mark);
         try:
             tdSql.query(sql,queryTimes=1)
+            self.explain_sql(sql)
         except:
             tdLog.info("sql is not support :=====%s; " %sql)
             tdSql.error(sql)
@@ -4995,9 +4996,7 @@ class TDTestCase:
             sql += "%s ;" % random.choice(self.limit_u_where)
             tdLog.info(sql)
             tdLog.info(len(sql))
-            tdSql.query(sql)
-            self.cur1.execute(sql)
-            self.explain_sql(sql)
+            self.data_check(sql,mark='15-2')
 
         tdSql.query("select 15-2.2 from stable_1;")
         for i in range(self.fornum):
@@ -5013,9 +5012,7 @@ class TDTestCase:
             sql += "%s ;" % random.choice(self.limit_u_where)
             tdLog.info(sql)
             tdLog.info(len(sql))
-            tdSql.query(sql)
-            self.cur1.execute(sql)
-            self.explain_sql(sql)
+            self.data_check(sql,mark='15-2.2')
 
         self.restartDnodes()
         tdSql.query("select 15-3 from stable_1;")
@@ -5033,9 +5030,7 @@ class TDTestCase:
             sql += "%s " % random.choice(self.limit_where)
             tdLog.info(sql)
             tdLog.info(len(sql))
-            tdSql.query(sql)
-            self.cur1.execute(sql)
-            self.explain_sql(sql)
+            self.data_check(sql,mark='15-3')
 
         tdSql.query("select 15-4 from stable_1;")
         for i in range(self.fornum):
@@ -5052,9 +5047,7 @@ class TDTestCase:
             sql += "%s " % random.choice(self.limit_u_where)
             tdLog.info(sql)
             tdLog.info(len(sql))
-            tdSql.query(sql)
-            self.cur1.execute(sql)
-            self.explain_sql(sql)
+            self.data_check(sql,mark='15-4')
 
         tdSql.query("select 15-4.2 from stable_1;")
         for i in range(self.fornum):
@@ -5087,8 +5080,7 @@ class TDTestCase:
             tdLog.info(sql)
             tdLog.info(len(sql))
             tdSql.query(sql)
-            self.cur1.execute(sql)
-            self.explain_sql(sql)
+            self.data_check(sql,mark='15-5')
 
         #16 select * from (select calc_aggregate_regulars as agg from regular_table  where <\>\in\and\or  order by limit offset )
         #self.dropandcreateDB_random("%s" %db, 1)