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
...
...
@@ -16,10 +13,8 @@ select number, count() over (partition by intDiv(number, 3) order by number) fro
7 2
8 3
9 1
-- proper calculation across blocks
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
...
...
@@ -30,14 +25,10 @@ select number, max(number) over (partition by intDiv(number, 3) order by number
7 8
6 8
9 9
-- not a window function
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 0.5
2 1
...
...
@@ -48,10 +39,8 @@ select number, avg(number) over (order by number) from numbers(10);
7 3.5
8 4
9 4.5
-- no order by
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
...
...
@@ -62,11 +51,8 @@ select number, quantileExact(number) over (partition by intDiv(number, 3)) from
7 7
8 7
9 9
-- can add an alias after window spec
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
...
...
@@ -77,21 +63,16 @@ select number, quantileExact(number) over (partition by intDiv(number, 3)) q fro
7 7
8 7
9 9
-- can't reference it yet -- the window functions are calculated at the
-- last stage of select, after all other functions.
select q * 10, quantileExact(number) over (partition by intDiv(number, 3)) q from numbers(10); -- { serverError 47 }
-- must work in WHERE if you wrap it in a subquery
select * from (select count(*) over () c from numbers(3)) where c > 0;
-- should work in ORDER BY
1
2
3
-- should work in ORDER BY
select number, max(number) over (partition by intDiv(number, 3) order by number desc) m from numbers(10) order by m desc, number;
-- also works in ORDER BY if you wrap it in a subquery
9 9
6 8
7 8
...
...
@@ -102,43 +83,33 @@ select number, max(number) over (partition by intDiv(number, 3) order by number
0 2
1 2
2 2
-- also works in ORDER BY if you wrap it in a subquery
select * from (select count(*) over () c from numbers(3)) order by c;
1
2
3
-- Example with window function only in ORDER BY. Here we make a rank of all
-- numbers sorted descending, and then sort by this rank descending, and must get
-- the ascending order.
select * from (select * from numbers(5) order by rand()) order by count() over (order by number desc) desc;
0
1
2
3
select * from (select * from numbers(5) order by rand()) order by count() over (order by number desc) desc;
4
-- Aggregate functions as window function arguments. This query is semantically
-- the same as the above one, only we replace `number` with
-- `any(number) group by number` and so on.
select * from (select * from numbers(5) order by rand()) group by number order by sum(any(number) + 1) over (order by min(number) desc) desc;
0
1
2
3
4
select * from (select * from numbers(5) order by rand()) group by number order by sum(any(number) + 1) over (order by min(number) desc) desc;
-- different windows
-- an explain test would also be helpful, but it's too immature now and I don't
-- want to change reference all the time
0
1
2
3
4
select number, max(number) over (partition by intDiv(number, 3) order by number desc), count(number) over (partition by intDiv(number, 5) order by number) as m from numbers(31) order by number settings max_block_size = 2;
-- two functions over the same window
-- an explain test would also be helpful, but it's too immature now and I don't
-- want to change reference all the time
0 2 1
1 2 2
2 2 3
...
...
@@ -170,10 +141,10 @@ select number, max(number) over (partition by intDiv(number, 3) order by number
28 29 4
29 29 5
30 30 1
-- two functions over the same window
-- an explain test would also be helpful, but it's too immature now and I don't
-- want to change reference all the time
select number, max(number) over (partition by intDiv(number, 3) order by number desc), count(number) over (partition by intDiv(number, 3) order by number desc) as m from numbers(7) order by number settings max_block_size = 2;
-- check that we can work with constant columns
0 2 3
1 2 2
2 2 1
...
...
@@ -181,35 +152,26 @@ select number, max(number) over (partition by intDiv(number, 3) order by number
4 5 2
5 5 1
6 6 1
-- check that we can work with constant columns
select median(x) over (partition by x) from (select 1 x);
-- an empty window definition is valid as well
1
-- an empty window definition is valid as well
select groupArray(number) over () from numbers(3);
-- This one tests we properly process the window function arguments.
-- Seen errors like 'column `1` not found' from count(1).
[0]
[0,1]
[0,1,2]
-- This one tests we properly process the window function arguments.
-- Seen errors like 'column `1` not found' from count(1).
select count(1) over (), max(number + 1) over () from numbers(3);
-- Should work in DISTINCT
1 3
-- Should work in DISTINCT
select distinct sum(0) over () from numbers(2);
0
select distinct any(number) over () from numbers(2);
0
-- Various kinds of aliases are properly substituted into various parts of window
-- function definition.
0
with number + 1 as x select intDiv(number, 3) as y, sum(x + y) over (partition by y order by x) from numbers(7);
