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1273 lines
28 KiB
Plaintext
1273 lines
28 KiB
Plaintext
-- { echo }
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-- just something basic
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select number, count() over (partition by intDiv(number, 3) order by number rows unbounded preceding) from numbers(10);
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0 1
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1 2
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2 3
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3 1
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4 2
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5 3
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6 1
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7 2
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8 3
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9 1
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-- proper calculation across blocks
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select number, max(number) over (partition by intDiv(number, 3) order by number desc rows unbounded preceding) from numbers(10) settings max_block_size = 2;
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2 2
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1 2
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0 2
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5 5
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4 5
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3 5
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8 8
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7 8
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6 8
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9 9
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-- not a window function
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select number, abs(number) over (partition by toString(intDiv(number, 3)) rows unbounded preceding) from numbers(10); -- { serverError 63 }
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-- no partition by
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select number, avg(number) over (order by number rows unbounded preceding) from numbers(10);
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0 0
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1 0.5
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2 1
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3 1.5
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4 2
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5 2.5
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6 3
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7 3.5
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8 4
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9 4.5
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-- no order by
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select number, quantileExact(number) over (partition by intDiv(number, 3) AS value order by number rows unbounded preceding) from numbers(10);
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0 0
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1 1
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2 1
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3 3
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4 4
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5 4
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6 6
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7 7
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8 7
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9 9
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-- can add an alias after window spec
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select number, quantileExact(number) over (partition by intDiv(number, 3) AS value order by number rows unbounded preceding) q from numbers(10);
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0 0
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1 1
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2 1
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3 3
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4 4
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5 4
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6 6
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7 7
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8 7
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9 9
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-- can't reference it yet -- the window functions are calculated at the
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-- last stage of select, after all other functions.
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select q * 10, quantileExact(number) over (partition by intDiv(number, 3) rows unbounded preceding) q from numbers(10); -- { serverError 47 }
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-- must work in WHERE if you wrap it in a subquery
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select * from (select count(*) over (rows unbounded preceding) c from numbers(3)) where c > 0;
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1
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2
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3
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-- should work in ORDER BY
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select number, max(number) over (partition by intDiv(number, 3) order by number desc rows unbounded preceding) m from numbers(10) order by m desc, number;
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9 9
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6 8
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7 8
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8 8
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3 5
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4 5
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5 5
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0 2
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1 2
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2 2
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-- also works in ORDER BY if you wrap it in a subquery
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select * from (select count(*) over (rows unbounded preceding) c from numbers(3)) order by c;
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1
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2
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3
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-- Example with window function only in ORDER BY. Here we make a rank of all
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-- numbers sorted descending, and then sort by this rank descending, and must get
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-- the ascending order.
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select * from (select * from numbers(5) order by rand()) order by count() over (order by number desc rows unbounded preceding) desc;
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0
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1
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2
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3
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4
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-- Aggregate functions as window function arguments. This query is semantically
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-- the same as the above one, only we replace `number` with
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-- `any(number) group by number` and so on.
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select * from (select * from numbers(5) order by rand()) group by number order by sum(any(number + 1)) over (order by min(number) desc rows unbounded preceding) desc;
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0
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1
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2
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3
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4
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-- some more simple cases w/aggregate functions
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select sum(any(number)) over (rows unbounded preceding) from numbers(1);
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0
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select sum(any(number) + 1) over (rows unbounded preceding) from numbers(1);
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1
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select sum(any(number + 1)) over (rows unbounded preceding) from numbers(1);
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1
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-- different windows
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-- an explain test would also be helpful, but it's too immature now and I don't
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-- want to change reference all the time
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select number, max(number) over (partition by intDiv(number, 3) order by number desc rows unbounded preceding), count(number) over (partition by intDiv(number, 5) order by number rows unbounded preceding) as m from numbers(31) order by number settings max_block_size = 2;
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0 2 1
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1 2 2
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2 2 3
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3 5 4
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4 5 5
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5 5 1
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6 8 2
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7 8 3
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8 8 4
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9 11 5
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10 11 1
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11 11 2
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12 14 3
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13 14 4
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14 14 5
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15 17 1
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16 17 2
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17 17 3
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18 20 4
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19 20 5
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20 20 1
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21 23 2
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22 23 3
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23 23 4
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24 26 5
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25 26 1
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26 26 2
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27 29 3
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28 29 4
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29 29 5
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30 30 1
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-- two functions over the same window
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-- an explain test would also be helpful, but it's too immature now and I don't
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-- want to change reference all the time
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select number, max(number) over (partition by intDiv(number, 3) order by number desc rows unbounded preceding), count(number) over (partition by intDiv(number, 3) order by number desc rows unbounded preceding) as m from numbers(7) order by number settings max_block_size = 2;
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0 2 3
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1 2 2
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2 2 1
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3 5 3
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4 5 2
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5 5 1
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6 6 1
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-- check that we can work with constant columns
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select median(x) over (partition by x) from (select 1 x);
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1
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-- an empty window definition is valid as well
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select groupArray(number) over (rows unbounded preceding) from numbers(3);
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[0]
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[0,1]
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[0,1,2]
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select groupArray(number) over () from numbers(3);
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[0,1,2]
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[0,1,2]
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[0,1,2]
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-- This one tests we properly process the window function arguments.
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-- Seen errors like 'column `1` not found' from count(1).
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select count(1) over (rows unbounded preceding), max(number + 1) over () from numbers(3);
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1 3
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2 3
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3 3
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-- Should work in DISTINCT
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select distinct sum(0) over (rows unbounded preceding) from numbers(2);
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0
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select distinct any(number) over (rows unbounded preceding) from numbers(2);
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0
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-- Various kinds of aliases are properly substituted into various parts of window
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-- function definition.
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with number + 1 as x select intDiv(number, 3) as y, sum(x + y) over (partition by y order by x rows unbounded preceding) from numbers(7);
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0 1
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0 3
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0 6
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1 5
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1 11
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1 18
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2 9
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-- WINDOW clause
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select 1 window w1 as ();
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1
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select sum(number) over w1, sum(number) over w2
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from numbers(10)
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window
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w1 as (rows unbounded preceding),
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w2 as (partition by intDiv(number, 3) as value order by number rows unbounded preceding)
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;
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0 0
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1 1
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3 3
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6 3
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10 7
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15 12
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21 6
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28 13
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36 21
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45 9
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-- FIXME both functions should use the same window, but they don't. Add an
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-- EXPLAIN test for this.
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select
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sum(number) over w1,
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sum(number) over (partition by intDiv(number, 3) as value order by number rows unbounded preceding)
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from numbers(10)
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window
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w1 as (partition by intDiv(number, 3) rows unbounded preceding)
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;
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0 0
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1 1
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3 3
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3 3
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7 7
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12 12
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6 6
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13 13
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21 21
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9 9
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-- RANGE frame
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-- It's the default
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select sum(number) over () from numbers(3);
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3
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3
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3
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-- Try some mutually prime sizes of partition, group and block, for the number
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-- of rows that is their least common multiple + 1, so that we see all the
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-- interesting corner cases.
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select number, intDiv(number, 3) p, mod(number, 2) o, count(number) over w as c
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from numbers(31)
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window w as (partition by p order by o, number range unbounded preceding)
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order by number
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settings max_block_size = 5
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;
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0 0 0 1
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1 0 1 3
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2 0 0 2
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3 1 1 2
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4 1 0 1
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5 1 1 3
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6 2 0 1
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7 2 1 3
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8 2 0 2
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9 3 1 2
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10 3 0 1
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11 3 1 3
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12 4 0 1
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13 4 1 3
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14 4 0 2
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15 5 1 2
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16 5 0 1
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17 5 1 3
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18 6 0 1
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19 6 1 3
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20 6 0 2
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21 7 1 2
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22 7 0 1
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23 7 1 3
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24 8 0 1
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25 8 1 3
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26 8 0 2
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27 9 1 2
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28 9 0 1
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29 9 1 3
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30 10 0 1
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select number, intDiv(number, 5) p, mod(number, 3) o, count(number) over w as c
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from numbers(31)
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window w as (partition by p order by o, number range unbounded preceding)
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order by number
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settings max_block_size = 2
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;
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0 0 0 1
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1 0 1 3
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2 0 2 5
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3 0 0 2
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4 0 1 4
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5 1 2 4
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6 1 0 1
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7 1 1 3
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8 1 2 5
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9 1 0 2
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10 2 1 2
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11 2 2 4
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12 2 0 1
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13 2 1 3
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14 2 2 5
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15 3 0 1
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16 3 1 3
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17 3 2 5
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18 3 0 2
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19 3 1 4
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20 4 2 4
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21 4 0 1
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22 4 1 3
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23 4 2 5
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24 4 0 2
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25 5 1 2
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26 5 2 4
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27 5 0 1
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28 5 1 3
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29 5 2 5
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30 6 0 1
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select number, intDiv(number, 5) p, mod(number, 2) o, count(number) over w as c
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from numbers(31)
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window w as (partition by p order by o, number range unbounded preceding)
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order by number
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settings max_block_size = 3
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;
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0 0 0 1
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1 0 1 4
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2 0 0 2
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3 0 1 5
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4 0 0 3
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5 1 1 3
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6 1 0 1
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7 1 1 4
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8 1 0 2
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9 1 1 5
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10 2 0 1
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11 2 1 4
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12 2 0 2
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13 2 1 5
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14 2 0 3
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15 3 1 3
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16 3 0 1
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17 3 1 4
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18 3 0 2
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19 3 1 5
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20 4 0 1
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21 4 1 4
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22 4 0 2
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23 4 1 5
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24 4 0 3
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25 5 1 3
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26 5 0 1
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27 5 1 4
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28 5 0 2
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29 5 1 5
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30 6 0 1
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select number, intDiv(number, 3) p, mod(number, 5) o, count(number) over w as c
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from numbers(31)
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window w as (partition by p order by o, number range unbounded preceding)
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order by number
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settings max_block_size = 2
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;
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0 0 0 1
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1 0 1 2
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2 0 2 3
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3 1 3 2
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4 1 4 3
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5 1 0 1
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6 2 1 1
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7 2 2 2
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8 2 3 3
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9 3 4 3
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10 3 0 1
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11 3 1 2
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12 4 2 1
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13 4 3 2
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14 4 4 3
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15 5 0 1
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16 5 1 2
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17 5 2 3
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18 6 3 2
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19 6 4 3
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20 6 0 1
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21 7 1 1
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22 7 2 2
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23 7 3 3
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24 8 4 3
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25 8 0 1
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26 8 1 2
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27 9 2 1
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28 9 3 2
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29 9 4 3
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30 10 0 1
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select number, intDiv(number, 2) p, mod(number, 5) o, count(number) over w as c
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from numbers(31)
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window w as (partition by p order by o, number range unbounded preceding)
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order by number
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settings max_block_size = 3
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;
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0 0 0 1
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1 0 1 2
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2 1 2 1
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3 1 3 2
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4 2 4 2
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5 2 0 1
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6 3 1 1
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7 3 2 2
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8 4 3 1
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9 4 4 2
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10 5 0 1
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11 5 1 2
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12 6 2 1
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13 6 3 2
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14 7 4 2
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15 7 0 1
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16 8 1 1
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17 8 2 2
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18 9 3 1
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19 9 4 2
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20 10 0 1
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21 10 1 2
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22 11 2 1
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23 11 3 2
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24 12 4 2
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25 12 0 1
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26 13 1 1
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27 13 2 2
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28 14 3 1
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29 14 4 2
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30 15 0 1
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select number, intDiv(number, 2) p, mod(number, 3) o, count(number) over w as c
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from numbers(31)
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window w as (partition by p order by o range unbounded preceding)
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order by number
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settings max_block_size = 5
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;
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0 0 0 1
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1 0 1 2
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2 1 2 2
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3 1 0 1
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4 2 1 1
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5 2 2 2
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6 3 0 1
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7 3 1 2
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8 4 2 2
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9 4 0 1
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10 5 1 1
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11 5 2 2
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12 6 0 1
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13 6 1 2
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14 7 2 2
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15 7 0 1
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16 8 1 1
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17 8 2 2
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18 9 0 1
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19 9 1 2
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20 10 2 2
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21 10 0 1
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22 11 1 1
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23 11 2 2
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24 12 0 1
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25 12 1 2
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26 13 2 2
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27 13 0 1
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28 14 1 1
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29 14 2 2
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30 15 0 1
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-- A case where the partition end is in the current block, and the frame end
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-- is triggered by the partition end.
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select min(number) over (partition by p) from (select number, intDiv(number, 3) p from numbers(10));
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0
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0
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0
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3
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3
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3
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6
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6
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6
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9
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-- UNBOUNDED FOLLOWING frame end
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select
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min(number) over wa, min(number) over wo,
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max(number) over wa, max(number) over wo
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from
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(select number, intDiv(number, 3) p, mod(number, 5) o
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from numbers(31))
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window
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wa as (partition by p order by o
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range between unbounded preceding and unbounded following),
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wo as (partition by p order by o
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rows between unbounded preceding and unbounded following)
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settings max_block_size = 2;
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0 0 2 2
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0 0 2 2
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0 0 2 2
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3 3 5 5
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3 3 5 5
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3 3 5 5
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6 6 8 8
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6 6 8 8
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6 6 8 8
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9 9 11 11
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9 9 11 11
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9 9 11 11
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12 12 14 14
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12 12 14 14
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12 12 14 14
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15 15 17 17
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15 15 17 17
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15 15 17 17
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18 18 20 20
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18 18 20 20
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18 18 20 20
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21 21 23 23
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21 21 23 23
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21 21 23 23
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24 24 26 26
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24 24 26 26
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24 24 26 26
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27 27 29 29
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27 27 29 29
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27 27 29 29
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30 30 30 30
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-- ROWS offset frame start
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select number, p,
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count(*) over (partition by p order by number
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rows between 1 preceding and unbounded following),
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count(*) over (partition by p order by number
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rows between current row and unbounded following),
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count(*) over (partition by p order by number
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rows between 1 following and unbounded following)
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from (select number, intDiv(number, 5) p from numbers(31))
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order by p, number
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settings max_block_size = 2;
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0 0 5 5 4
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1 0 5 4 3
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2 0 4 3 2
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3 0 3 2 1
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4 0 2 1 0
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5 1 5 5 4
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6 1 5 4 3
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7 1 4 3 2
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8 1 3 2 1
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9 1 2 1 0
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10 2 5 5 4
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11 2 5 4 3
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12 2 4 3 2
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13 2 3 2 1
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14 2 2 1 0
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15 3 5 5 4
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16 3 5 4 3
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17 3 4 3 2
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18 3 3 2 1
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19 3 2 1 0
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20 4 5 5 4
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21 4 5 4 3
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22 4 4 3 2
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23 4 3 2 1
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24 4 2 1 0
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25 5 5 5 4
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26 5 5 4 3
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27 5 4 3 2
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28 5 3 2 1
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29 5 2 1 0
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30 6 1 1 0
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-- ROWS offset frame start and end
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select number, p,
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count(*) over (partition by p order by number
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rows between 2 preceding and 2 following)
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from (select number, intDiv(number, 7) p from numbers(71))
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order by p, number
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settings max_block_size = 2;
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0 0 3
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1 0 4
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2 0 5
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3 0 5
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4 0 5
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5 0 4
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6 0 3
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7 1 3
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|
8 1 4
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9 1 5
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10 1 5
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11 1 5
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12 1 4
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13 1 3
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14 2 3
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15 2 4
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16 2 5
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17 2 5
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18 2 5
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19 2 4
|
|
20 2 3
|
|
21 3 3
|
|
22 3 4
|
|
23 3 5
|
|
24 3 5
|
|
25 3 5
|
|
26 3 4
|
|
27 3 3
|
|
28 4 3
|
|
29 4 4
|
|
30 4 5
|
|
31 4 5
|
|
32 4 5
|
|
33 4 4
|
|
34 4 3
|
|
35 5 3
|
|
36 5 4
|
|
37 5 5
|
|
38 5 5
|
|
39 5 5
|
|
40 5 4
|
|
41 5 3
|
|
42 6 3
|
|
43 6 4
|
|
44 6 5
|
|
45 6 5
|
|
46 6 5
|
|
47 6 4
|
|
48 6 3
|
|
49 7 3
|
|
50 7 4
|
|
51 7 5
|
|
52 7 5
|
|
53 7 5
|
|
54 7 4
|
|
55 7 3
|
|
56 8 3
|
|
57 8 4
|
|
58 8 5
|
|
59 8 5
|
|
60 8 5
|
|
61 8 4
|
|
62 8 3
|
|
63 9 3
|
|
64 9 4
|
|
65 9 5
|
|
66 9 5
|
|
67 9 5
|
|
68 9 4
|
|
69 9 3
|
|
70 10 1
|
|
SELECT count(*) OVER (ROWS BETWEEN 2 PRECEDING AND CURRENT ROW) FROM numbers(4);
|
|
1
|
|
2
|
|
3
|
|
3
|
|
-- frame boundaries that runs into the partition end
|
|
select
|
|
count() over (partition by intDiv(number, 3)
|
|
rows between 100 following and unbounded following),
|
|
count() over (partition by intDiv(number, 3)
|
|
rows between current row and 100 following)
|
|
from numbers(10);
|
|
0 3
|
|
0 2
|
|
0 1
|
|
0 3
|
|
0 2
|
|
0 1
|
|
0 3
|
|
0 2
|
|
0 1
|
|
0 1
|
|
-- seen a use-after-free under MSan in this query once
|
|
SELECT number, max(number) OVER (PARTITION BY intDiv(number, 7) ORDER BY number ASC NULLS LAST ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) FROM numbers(1024) SETTINGS max_block_size = 2 FORMAT Null;
|
|
-- a corner case
|
|
select count() over ();
|
|
1
|
|
-- RANGE CURRENT ROW frame start
|
|
select number, p, o,
|
|
count(*) over (partition by p order by o
|
|
range between current row and unbounded following)
|
|
from (select number, intDiv(number, 5) p, mod(number, 3) o
|
|
from numbers(31))
|
|
order by p, o, number
|
|
settings max_block_size = 2;
|
|
0 0 0 5
|
|
3 0 0 5
|
|
1 0 1 3
|
|
4 0 1 3
|
|
2 0 2 1
|
|
6 1 0 5
|
|
9 1 0 5
|
|
7 1 1 3
|
|
5 1 2 2
|
|
8 1 2 2
|
|
12 2 0 5
|
|
10 2 1 4
|
|
13 2 1 4
|
|
11 2 2 2
|
|
14 2 2 2
|
|
15 3 0 5
|
|
18 3 0 5
|
|
16 3 1 3
|
|
19 3 1 3
|
|
17 3 2 1
|
|
21 4 0 5
|
|
24 4 0 5
|
|
22 4 1 3
|
|
20 4 2 2
|
|
23 4 2 2
|
|
27 5 0 5
|
|
25 5 1 4
|
|
28 5 1 4
|
|
26 5 2 2
|
|
29 5 2 2
|
|
30 6 0 1
|
|
select
|
|
count(*) over (rows between current row and current row),
|
|
count(*) over (range between current row and current row)
|
|
from numbers(3);
|
|
1 3
|
|
1 3
|
|
1 3
|
|
-- RANGE OFFSET
|
|
-- a basic RANGE OFFSET frame
|
|
select x, min(x) over w, max(x) over w, count(x) over w from (
|
|
select toUInt8(number) x from numbers(11))
|
|
window w as (order by x asc range between 1 preceding and 2 following)
|
|
order by x;
|
|
0 0 2 3
|
|
1 0 3 4
|
|
2 1 4 4
|
|
3 2 5 4
|
|
4 3 6 4
|
|
5 4 7 4
|
|
6 5 8 4
|
|
7 6 9 4
|
|
8 7 10 4
|
|
9 8 10 3
|
|
10 9 10 2
|
|
-- overflow conditions
|
|
select x, min(x) over w, max(x) over w, count(x) over w
|
|
from (
|
|
select toUInt8(if(mod(number, 2),
|
|
toInt64(255 - intDiv(number, 2)),
|
|
toInt64(intDiv(number, 2)))) x
|
|
from numbers(10)
|
|
)
|
|
window w as (order by x range between 1 preceding and 2 following)
|
|
order by x;
|
|
0 0 2 3
|
|
1 0 3 4
|
|
2 1 4 4
|
|
3 2 4 3
|
|
4 3 4 2
|
|
251 251 253 3
|
|
252 251 254 4
|
|
253 252 255 4
|
|
254 253 255 3
|
|
255 254 255 2
|
|
select x, min(x) over w, max(x) over w, count(x) over w
|
|
from (
|
|
select toInt8(multiIf(
|
|
mod(number, 3) == 0, toInt64(intDiv(number, 3)),
|
|
mod(number, 3) == 1, toInt64(127 - intDiv(number, 3)),
|
|
toInt64(-128 + intDiv(number, 3)))) x
|
|
from numbers(15)
|
|
)
|
|
window w as (order by x range between 1 preceding and 2 following)
|
|
order by x;
|
|
-128 -128 -126 3
|
|
-127 -128 -125 4
|
|
-126 -127 -124 4
|
|
-125 -126 -124 3
|
|
-124 -125 -124 2
|
|
0 0 2 3
|
|
1 0 3 4
|
|
2 1 4 4
|
|
3 2 4 3
|
|
4 3 4 2
|
|
123 123 125 3
|
|
124 123 126 4
|
|
125 124 127 4
|
|
126 125 127 3
|
|
127 126 127 2
|
|
-- We need large offsets to trigger overflow to positive direction, or
|
|
-- else the frame end runs into partition end w/o overflow and doesn't move
|
|
-- after that. The frame from this query is equivalent to the entire partition.
|
|
select x, min(x) over w, max(x) over w, count(x) over w
|
|
from (
|
|
select toUInt8(if(mod(number, 2),
|
|
toInt64(255 - intDiv(number, 2)),
|
|
toInt64(intDiv(number, 2)))) x
|
|
from numbers(10)
|
|
)
|
|
window w as (order by x range between 255 preceding and 255 following)
|
|
order by x;
|
|
0 0 255 10
|
|
1 0 255 10
|
|
2 0 255 10
|
|
3 0 255 10
|
|
4 0 255 10
|
|
251 0 255 10
|
|
252 0 255 10
|
|
253 0 255 10
|
|
254 0 255 10
|
|
255 0 255 10
|
|
-- RANGE OFFSET ORDER BY DESC
|
|
select x, min(x) over w, max(x) over w, count(x) over w from (
|
|
select toUInt8(number) x from numbers(11)) t
|
|
window w as (order by x desc range between 1 preceding and 2 following)
|
|
order by x
|
|
settings max_block_size = 1;
|
|
0 0 1 2
|
|
1 0 2 3
|
|
2 0 3 4
|
|
3 1 4 4
|
|
4 2 5 4
|
|
5 3 6 4
|
|
6 4 7 4
|
|
7 5 8 4
|
|
8 6 9 4
|
|
9 7 10 4
|
|
10 8 10 3
|
|
select x, min(x) over w, max(x) over w, count(x) over w from (
|
|
select toUInt8(number) x from numbers(11)) t
|
|
window w as (order by x desc range between 1 preceding and unbounded following)
|
|
order by x
|
|
settings max_block_size = 2;
|
|
0 0 1 2
|
|
1 0 2 3
|
|
2 0 3 4
|
|
3 0 4 5
|
|
4 0 5 6
|
|
5 0 6 7
|
|
6 0 7 8
|
|
7 0 8 9
|
|
8 0 9 10
|
|
9 0 10 11
|
|
10 0 10 11
|
|
select x, min(x) over w, max(x) over w, count(x) over w from (
|
|
select toUInt8(number) x from numbers(11)) t
|
|
window w as (order by x desc range between unbounded preceding and 2 following)
|
|
order by x
|
|
settings max_block_size = 3;
|
|
0 0 10 11
|
|
1 0 10 11
|
|
2 0 10 11
|
|
3 1 10 10
|
|
4 2 10 9
|
|
5 3 10 8
|
|
6 4 10 7
|
|
7 5 10 6
|
|
8 6 10 5
|
|
9 7 10 4
|
|
10 8 10 3
|
|
select x, min(x) over w, max(x) over w, count(x) over w from (
|
|
select toUInt8(number) x from numbers(11)) t
|
|
window w as (order by x desc range between unbounded preceding and 2 preceding)
|
|
order by x
|
|
settings max_block_size = 4;
|
|
0 2 10 9
|
|
1 3 10 8
|
|
2 4 10 7
|
|
3 5 10 6
|
|
4 6 10 5
|
|
5 7 10 4
|
|
6 8 10 3
|
|
7 9 10 2
|
|
8 10 10 1
|
|
9 0 0 0
|
|
10 0 0 0
|
|
-- Check that we put windows in such an order that we can reuse the sort.
|
|
-- First, check that at least the result is correct when we have many windows
|
|
-- with different sort order.
|
|
select
|
|
number,
|
|
count(*) over (partition by p order by number),
|
|
count(*) over (partition by p order by number, o),
|
|
count(*) over (),
|
|
count(*) over (order by number),
|
|
count(*) over (order by o),
|
|
count(*) over (order by o, number),
|
|
count(*) over (order by number, o),
|
|
count(*) over (partition by p order by o, number),
|
|
count(*) over (partition by p),
|
|
count(*) over (partition by p order by o),
|
|
count(*) over (partition by p, o order by number)
|
|
from
|
|
(select number, intDiv(number, 3) p, mod(number, 5) o
|
|
from numbers(16)) t
|
|
order by number
|
|
;
|
|
0 1 1 16 1 4 1 1 1 3 1 1
|
|
1 2 2 16 2 7 5 2 2 3 2 1
|
|
2 3 3 16 3 10 8 3 3 3 3 1
|
|
3 1 1 16 4 13 11 4 2 3 2 1
|
|
4 2 2 16 5 16 14 5 3 3 3 1
|
|
5 3 3 16 6 4 2 6 1 3 1 1
|
|
6 1 1 16 7 7 6 7 1 3 1 1
|
|
7 2 2 16 8 10 9 8 2 3 2 1
|
|
8 3 3 16 9 13 12 9 3 3 3 1
|
|
9 1 1 16 10 16 15 10 3 3 3 1
|
|
10 2 2 16 11 4 3 11 1 3 1 1
|
|
11 3 3 16 12 7 7 12 2 3 2 1
|
|
12 1 1 16 13 10 10 13 1 3 1 1
|
|
13 2 2 16 14 13 13 14 2 3 2 1
|
|
14 3 3 16 15 16 16 15 3 3 3 1
|
|
15 1 1 16 16 4 4 16 1 1 1 1
|
|
-- The EXPLAIN for the above query would be difficult to understand, so check some
|
|
-- simple cases instead.
|
|
explain select
|
|
count(*) over (partition by p),
|
|
count(*) over (),
|
|
count(*) over (partition by p order by o)
|
|
from
|
|
(select number, intDiv(number, 3) p, mod(number, 5) o
|
|
from numbers(16)) t
|
|
;
|
|
Expression ((Projection + Before ORDER BY))
|
|
Window (Window step for window \'\')
|
|
Window (Window step for window \'PARTITION BY p\')
|
|
Window (Window step for window \'PARTITION BY p ORDER BY o ASC\')
|
|
Sorting (Sorting for window \'PARTITION BY p ORDER BY o ASC\')
|
|
Expression ((Before window functions + (Projection + Before ORDER BY)))
|
|
SettingQuotaAndLimits (Set limits and quota after reading from storage)
|
|
ReadFromStorage (SystemNumbers)
|
|
explain select
|
|
count(*) over (order by o, number),
|
|
count(*) over (order by number)
|
|
from
|
|
(select number, intDiv(number, 3) p, mod(number, 5) o
|
|
from numbers(16)) t
|
|
;
|
|
Expression ((Projection + Before ORDER BY))
|
|
Window (Window step for window \'ORDER BY o ASC, number ASC\')
|
|
Sorting (Sorting for window \'ORDER BY o ASC, number ASC\')
|
|
Window (Window step for window \'ORDER BY number ASC\')
|
|
Expression ((Before window functions + (Projection + Before ORDER BY)) [lifted up part])
|
|
Sorting (Sorting for window \'ORDER BY number ASC\')
|
|
Expression ((Before window functions + (Projection + Before ORDER BY)))
|
|
SettingQuotaAndLimits (Set limits and quota after reading from storage)
|
|
ReadFromStorage (SystemNumbers)
|
|
-- A test case for the sort comparator found by fuzzer.
|
|
SELECT
|
|
max(number) OVER (ORDER BY number DESC NULLS FIRST),
|
|
max(number) OVER (ORDER BY number ASC NULLS FIRST)
|
|
FROM numbers(2)
|
|
;
|
|
1 0
|
|
1 1
|
|
-- optimize_read_in_order conflicts with sorting for window functions, check that
|
|
-- it is disabled.
|
|
drop table if exists window_mt;
|
|
create table window_mt engine MergeTree order by number
|
|
as select number, mod(number, 3) p from numbers(100);
|
|
select number, count(*) over (partition by p)
|
|
from window_mt order by number limit 10 settings optimize_read_in_order = 0;
|
|
0 34
|
|
1 33
|
|
2 33
|
|
3 34
|
|
4 33
|
|
5 33
|
|
6 34
|
|
7 33
|
|
8 33
|
|
9 34
|
|
select number, count(*) over (partition by p)
|
|
from window_mt order by number limit 10 settings optimize_read_in_order = 1;
|
|
0 34
|
|
1 33
|
|
2 33
|
|
3 34
|
|
4 33
|
|
5 33
|
|
6 34
|
|
7 33
|
|
8 33
|
|
9 34
|
|
drop table window_mt;
|
|
-- some true window functions -- rank and friends
|
|
select number, p, o,
|
|
count(*) over w,
|
|
rank() over w,
|
|
dense_rank() over w,
|
|
row_number() over w
|
|
from (select number, intDiv(number, 5) p, mod(number, 3) o
|
|
from numbers(31) order by o, number) t
|
|
window w as (partition by p order by o, number)
|
|
order by p, o, number
|
|
settings max_block_size = 2;
|
|
0 0 0 1 1 1 1
|
|
3 0 0 2 2 2 2
|
|
1 0 1 3 3 3 3
|
|
4 0 1 4 4 4 4
|
|
2 0 2 5 5 5 5
|
|
6 1 0 1 1 1 1
|
|
9 1 0 2 2 2 2
|
|
7 1 1 3 3 3 3
|
|
5 1 2 4 4 4 4
|
|
8 1 2 5 5 5 5
|
|
12 2 0 1 1 1 1
|
|
10 2 1 2 2 2 2
|
|
13 2 1 3 3 3 3
|
|
11 2 2 4 4 4 4
|
|
14 2 2 5 5 5 5
|
|
15 3 0 1 1 1 1
|
|
18 3 0 2 2 2 2
|
|
16 3 1 3 3 3 3
|
|
19 3 1 4 4 4 4
|
|
17 3 2 5 5 5 5
|
|
21 4 0 1 1 1 1
|
|
24 4 0 2 2 2 2
|
|
22 4 1 3 3 3 3
|
|
20 4 2 4 4 4 4
|
|
23 4 2 5 5 5 5
|
|
27 5 0 1 1 1 1
|
|
25 5 1 2 2 2 2
|
|
28 5 1 3 3 3 3
|
|
26 5 2 4 4 4 4
|
|
29 5 2 5 5 5 5
|
|
30 6 0 1 1 1 1
|
|
-- our replacement for lag/lead
|
|
select
|
|
anyOrNull(number)
|
|
over (order by number rows between 1 preceding and 1 preceding),
|
|
anyOrNull(number)
|
|
over (order by number rows between 1 following and 1 following)
|
|
from numbers(5);
|
|
\N 1
|
|
0 2
|
|
1 3
|
|
2 4
|
|
3 \N
|
|
-- variants of lag/lead that respect the frame
|
|
select number, p, pp,
|
|
lagInFrame(number) over w as lag1,
|
|
lagInFrame(number, number - pp) over w as lag2,
|
|
lagInFrame(number, number - pp, number * 11) over w as lag,
|
|
leadInFrame(number, number - pp, number * 11) over w as lead
|
|
from (select number, intDiv(number, 5) p, p * 5 pp from numbers(16))
|
|
window w as (partition by p order by number
|
|
rows between unbounded preceding and unbounded following)
|
|
order by number
|
|
settings max_block_size = 3;
|
|
;
|
|
0 0 0 0 0 0 0
|
|
1 0 0 0 0 0 2
|
|
2 0 0 1 0 0 4
|
|
3 0 0 2 0 0 33
|
|
4 0 0 3 0 0 44
|
|
5 1 5 0 5 5 5
|
|
6 1 5 5 5 5 7
|
|
7 1 5 6 5 5 9
|
|
8 1 5 7 5 5 88
|
|
9 1 5 8 5 5 99
|
|
10 2 10 0 10 10 10
|
|
11 2 10 10 10 10 12
|
|
12 2 10 11 10 10 14
|
|
13 2 10 12 10 10 143
|
|
14 2 10 13 10 10 154
|
|
15 3 15 0 15 15 15
|
|
-- careful with auto-application of Null combinator
|
|
select lagInFrame(toNullable(1)) over ();
|
|
\N
|
|
select lagInFrameOrNull(1) over (); -- { serverError 36 }
|
|
-- this is the same as `select max(Null::Nullable(Nothing))`
|
|
select intDiv(1, NULL) x, toTypeName(x), max(x) over ();
|
|
\N Nullable(Nothing) \N
|
|
-- to make lagInFrame return null for out-of-frame rows, cast the argument to
|
|
-- Nullable; otherwise, it returns default values.
|
|
SELECT
|
|
number,
|
|
lagInFrame(toNullable(number), 1) OVER w,
|
|
lagInFrame(toNullable(number), 2) OVER w,
|
|
lagInFrame(number, 1) OVER w,
|
|
lagInFrame(number, 2) OVER w
|
|
FROM numbers(4)
|
|
WINDOW w AS (ORDER BY number ASC)
|
|
;
|
|
0 \N \N 0 0
|
|
1 0 \N 0 0
|
|
2 1 0 1 0
|
|
3 2 1 2 1
|
|
-- case-insensitive SQL-standard synonyms for any and anyLast
|
|
select
|
|
number,
|
|
fIrSt_VaLue(number) over w,
|
|
lAsT_vAlUe(number) over w
|
|
from numbers(10)
|
|
window w as (order by number range between 1 preceding and 1 following)
|
|
order by number
|
|
;
|
|
0 0 1
|
|
1 0 2
|
|
2 1 3
|
|
3 2 4
|
|
4 3 5
|
|
5 4 6
|
|
6 5 7
|
|
7 6 8
|
|
8 7 9
|
|
9 8 9
|
|
-- nth_value without specific frame range given
|
|
select
|
|
number,
|
|
nth_value(number, 1) over w as firstValue,
|
|
nth_value(number, 2) over w as secondValue,
|
|
nth_value(number, 3) over w as thirdValue,
|
|
nth_value(number, 4) over w as fourthValue
|
|
from numbers(10)
|
|
window w as (order by number)
|
|
order by number
|
|
;
|
|
0 0 0 0 0
|
|
1 0 1 0 0
|
|
2 0 1 2 0
|
|
3 0 1 2 3
|
|
4 0 1 2 3
|
|
5 0 1 2 3
|
|
6 0 1 2 3
|
|
7 0 1 2 3
|
|
8 0 1 2 3
|
|
9 0 1 2 3
|
|
-- nth_value with frame range specified
|
|
select
|
|
number,
|
|
nth_value(number, 1) over w as firstValue,
|
|
nth_value(number, 2) over w as secondValue,
|
|
nth_value(number, 3) over w as thirdValue,
|
|
nth_value(number, 4) over w as fourthValue
|
|
from numbers(10)
|
|
window w as (order by number range between 1 preceding and 1 following)
|
|
order by number
|
|
;
|
|
0 0 1 0 0
|
|
1 0 1 2 0
|
|
2 1 2 3 0
|
|
3 2 3 4 0
|
|
4 3 4 5 0
|
|
5 4 5 6 0
|
|
6 5 6 7 0
|
|
7 6 7 8 0
|
|
8 7 8 9 0
|
|
9 8 9 0 0
|
|
-- to make nth_value return null for out-of-frame rows, cast the argument to
|
|
-- Nullable; otherwise, it returns default values.
|
|
SELECT
|
|
number,
|
|
nth_value(toNullable(number), 1) OVER w as firstValue,
|
|
nth_value(toNullable(number), 3) OVER w as thridValue
|
|
FROM numbers(5)
|
|
WINDOW w AS (ORDER BY number ASC)
|
|
;
|
|
0 0 \N
|
|
1 0 \N
|
|
2 0 2
|
|
3 0 2
|
|
4 0 2
|
|
-- nth_value UBsan
|
|
SELECT nth_value(1, -1) OVER (); -- { serverError BAD_ARGUMENTS }
|
|
SELECT nth_value(1, 0) OVER (); -- { serverError BAD_ARGUMENTS }
|
|
SELECT nth_value(1, /* INT64_MAX+1 */ 0x7fffffffffffffff+1) OVER (); -- { serverError BAD_ARGUMENTS }
|
|
SELECT nth_value(1, /* INT64_MAX */ 0x7fffffffffffffff) OVER ();
|
|
0
|
|
SELECT nth_value(1, 1) OVER ();
|
|
1
|
|
-- lagInFrame UBsan
|
|
SELECT lagInFrame(1, -1) OVER (); -- { serverError BAD_ARGUMENTS }
|
|
SELECT lagInFrame(1, 0) OVER ();
|
|
1
|
|
SELECT lagInFrame(1, /* INT64_MAX+1 */ 0x7fffffffffffffff+1) OVER (); -- { serverError BAD_ARGUMENTS }
|
|
SELECT lagInFrame(1, /* INT64_MAX */ 0x7fffffffffffffff) OVER ();
|
|
0
|
|
SELECT lagInFrame(1, 1) OVER ();
|
|
0
|
|
-- leadInFrame UBsan
|
|
SELECT leadInFrame(1, -1) OVER (); -- { serverError BAD_ARGUMENTS }
|
|
SELECT leadInFrame(1, 0) OVER ();
|
|
1
|
|
SELECT leadInFrame(1, /* INT64_MAX+1 */ 0x7fffffffffffffff+1) OVER (); -- { serverError BAD_ARGUMENTS }
|
|
SELECT leadInFrame(1, /* INT64_MAX */ 0x7fffffffffffffff) OVER ();
|
|
0
|
|
SELECT leadInFrame(1, 1) OVER ();
|
|
0
|
|
-- nth_value Msan
|
|
SELECT nth_value(1, '') OVER (); -- { serverError BAD_ARGUMENTS }
|
|
-- lagInFrame Msan
|
|
SELECT lagInFrame(1, '') OVER (); -- { serverError BAD_ARGUMENTS }
|
|
-- leadInFrame Msan
|
|
SELECT leadInFrame(1, '') OVER (); -- { serverError BAD_ARGUMENTS }
|
|
-- In this case, we had a problem with PartialSortingTransform returning zero-row
|
|
-- chunks for input chunks w/o columns.
|
|
select count() over () from numbers(4) where number < 2;
|
|
2
|
|
2
|
|
-- floating point RANGE frame
|
|
select
|
|
count(*) over (order by toFloat32(number) range 5. preceding),
|
|
count(*) over (order by toFloat64(number) range 5. preceding),
|
|
count(*) over (order by toFloat32(number) range between current row and 5. following),
|
|
count(*) over (order by toFloat64(number) range between current row and 5. following)
|
|
from numbers(7)
|
|
;
|
|
1 1 6 6
|
|
2 2 6 6
|
|
3 3 5 5
|
|
4 4 4 4
|
|
5 5 3 3
|
|
6 6 2 2
|
|
6 6 1 1
|
|
-- negative offsets should not be allowed
|
|
select count() over (order by toInt64(number) range between -1 preceding and unbounded following) from numbers(1); -- { serverError 36 }
|
|
select count() over (order by toInt64(number) range between -1 following and unbounded following) from numbers(1); -- { serverError 36 }
|
|
select count() over (order by toInt64(number) range between unbounded preceding and -1 preceding) from numbers(1); -- { serverError 36 }
|
|
select count() over (order by toInt64(number) range between unbounded preceding and -1 following) from numbers(1); -- { serverError 36 }
|
|
-- a test with aggregate function that allocates memory in arena
|
|
select sum(a[length(a)])
|
|
from (
|
|
select groupArray(number) over (partition by modulo(number, 11)
|
|
order by modulo(number, 1111), number) a
|
|
from numbers_mt(10000)
|
|
) settings max_block_size = 7;
|
|
49995000
|
|
-- a test with aggregate function which is -state type
|
|
select bitmapCardinality(bs)
|
|
from
|
|
(
|
|
select groupBitmapMergeState(bm) over (order by k asc rows between unbounded preceding and current row) as bs
|
|
from
|
|
(
|
|
select
|
|
groupBitmapState(number) as bm, k
|
|
from
|
|
(
|
|
select
|
|
number,
|
|
number % 3 as k
|
|
from numbers(3)
|
|
)
|
|
group by k
|
|
)
|
|
);
|
|
1
|
|
2
|
|
3
|
|
-- -INT_MIN row offset that can lead to problems with negation, found when fuzzing
|
|
-- under UBSan. Should be limited to at most INT_MAX.
|
|
select count() over (rows between 2147483648 preceding and 2147493648 following) from numbers(2); -- { serverError 36 }
|
|
-- Somehow in this case WindowTransform gets empty input chunks not marked as
|
|
-- input end, and then two (!) empty input chunks marked as input end. Whatever.
|
|
select count() over () from (select 1 a) l inner join (select 2 a) r using a;
|
|
-- This case works as expected, one empty input chunk marked as input end.
|
|
select count() over () where null;
|
|
-- Inheriting another window.
|
|
select number, count() over (w1 rows unbounded preceding) from numbers(10)
|
|
window
|
|
w0 as (partition by intDiv(number, 5) as p),
|
|
w1 as (w0 order by mod(number, 3) as o, number)
|
|
order by p, o, number
|
|
;
|
|
0 1
|
|
3 2
|
|
1 3
|
|
4 4
|
|
2 5
|
|
6 1
|
|
9 2
|
|
7 3
|
|
5 4
|
|
8 5
|
|
-- can't redefine PARTITION BY
|
|
select count() over (w partition by number) from numbers(1) window w as (partition by intDiv(number, 5)); -- { serverError 36 }
|
|
-- can't redefine existing ORDER BY
|
|
select count() over (w order by number) from numbers(1) window w as (partition by intDiv(number, 5) order by mod(number, 3)); -- { serverError 36 }
|
|
-- parent window can't have frame
|
|
select count() over (w range unbounded preceding) from numbers(1) window w as (partition by intDiv(number, 5) order by mod(number, 3) rows unbounded preceding); -- { serverError 36 }
|
|
-- looks weird but probably should work -- this is a window that inherits and changes nothing
|
|
select count() over (w) from numbers(1) window w as ();
|
|
1
|
|
-- nonexistent parent window
|
|
select count() over (w2 rows unbounded preceding); -- { serverError 36 }
|