ClickHouse/tests/queries/0_stateless/01591_window_functions.reference

set allow_experimental_window_functions = 1;

-- just something basic

select number, count() over (partition by intDiv(number, 3) order by number) from numbers(10);

-- proper calculation across blocks

0	1
1	2
2	3
3	1
4	2
5	3
6	1
7	2
8	3
9	1
select number, max(number) over (partition by intDiv(number, 3) order by number desc) from numbers(10) settings max_block_size = 2;

-- not a window function

2	2
1	2
0	2
5	5
4	5
3	5
8	8
7	8
6	8
9	9
select number, abs(number) over (partition by toString(intDiv(number, 3))) from numbers(10); -- { serverError 63 }

-- no partition by

select number, avg(number) over (order by number) from numbers(10);

-- no order by

0	0
1	0
2	1
3	1
4	2
5	2
6	3
7	3
8	4
9	4
select number, quantileExact(number) over (partition by intDiv(number, 3)) from numbers(10);

-- can add an alias after window spec

0	0
1	1
2	1
3	3
4	4
5	4
6	6
7	7
8	7
9	9
select number, quantileExact(number) over (partition by intDiv(number, 3)) q from numbers(10);

-- can't reference it yet -- the window functions are calculated at the
-- last stage of select, after all other functions.

0	0
1	1
2	1
3	3
4	4
5	4
6	6
7	7
8	7
9	9
select q * 10, quantileExact(number) over (partition by intDiv(number, 3)) q from numbers(10); -- { serverError 47 }

-- should work in ORDER BY though

select number, max(number) over (partition by intDiv(number, 3) order by number desc) m from numbers(10) order by m desc, number;


9	9
6	8
7	8
8	8
3	5
4	5
5	5
0	2
1	2
2	2