-- { echo }
select row_number() over (order by dummy) from (select * from remote('127.0.0.{1,2}', system, one));
1
2
select row_number() over (order by dummy) from remote('127.0.0.{1,2}', system, one);
1
2
select max(identity(dummy + 1)) over () from remote('127.0.0.{1,2}', system, one);
1
1
drop table if exists t_01568;
create table t_01568 engine Memory as
select intDiv(number, 3) p, modulo(number, 3) o, number
from numbers(9);
select sum(number) over w, max(number) over w from t_01568 window w as (partition by p);
3	2
3	2
3	2
12	5
12	5
12	5
21	8
21	8
21	8
select sum(number) over w, max(number) over w from remote('127.0.0.{1,2}', '', t_01568) window w as (partition by p);
6	2
6	2
6	2
6	2
6	2
6	2
24	5
24	5
24	5
24	5
24	5
24	5
42	8
42	8
42	8
42	8
42	8
42	8
select distinct sum(number) over w, max(number) over w from remote('127.0.0.{1,2}', '', t_01568) window w as (partition by p);
6	2
24	5
42	8
-- window functions + aggregation w/shards
select groupArray(groupArray(number)) over (rows unbounded preceding) from remote('127.0.0.{1,2}', '', t_01568) group by mod(number, 3);
[[0,3,6,0,3,6]]
[[0,3,6,0,3,6],[1,4,7,1,4,7]]
[[0,3,6,0,3,6],[1,4,7,1,4,7],[2,5,8,2,5,8]]
select groupArray(groupArray(number)) over (rows unbounded preceding) from remote('127.0.0.{1,2}', '', t_01568) group by mod(number, 3) settings distributed_group_by_no_merge=1;
[[0,3,6]]
[[0,3,6],[1,4,7]]
[[0,3,6],[1,4,7],[2,5,8]]
[[0,3,6]]
[[0,3,6],[1,4,7]]
[[0,3,6],[1,4,7],[2,5,8]]
select groupArray(groupArray(number)) over (rows unbounded preceding) from remote('127.0.0.{1,2}', '', t_01568) group by mod(number, 3) settings distributed_group_by_no_merge=2; -- { serverError 48 }
-- proper ORDER BY w/window functions
select p, o, count() over (partition by p)
from remote('127.0.0.{1,2}', '',  t_01568)
order by p, o;
0	0	6
0	0	6
0	1	6
0	1	6
0	2	6
0	2	6
1	0	6
1	0	6
1	1	6
1	1	6
1	2	6
1	2	6
2	0	6
2	0	6
2	1	6
2	1	6
2	2	6
2	2	6
drop table t_01568;