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548 lines
21 KiB
SQL
548 lines
21 KiB
SQL
-- Tags: long
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-- { 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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-- 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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-- 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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-- 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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-- 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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-- now we should be able to compute expressions with window functions
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select number, q * 10, quantileExact(number) over (partition by intDiv(number, 3) order by number rows unbounded preceding) q from numbers(10) order by number;
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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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-- 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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-- 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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-- 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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-- 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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-- 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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select sum(any(number) + 1) over (rows unbounded preceding) from numbers(1);
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select sum(any(number + 1)) over (rows unbounded preceding) from numbers(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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-- 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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-- 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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-- 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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select groupArray(number) over () from numbers(3);
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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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-- Should work in DISTINCT
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select distinct sum(0) over (rows unbounded preceding) from numbers(2);
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select distinct any(number) over (rows unbounded preceding) from numbers(2);
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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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-- WINDOW clause
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select 1 window w1 as ();
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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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-- 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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-- 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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-- 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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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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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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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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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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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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-- 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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-- 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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-- 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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-- 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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SELECT count(*) OVER (ROWS BETWEEN 2 PRECEDING AND CURRENT ROW) FROM numbers(4);
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-- frame boundaries that runs into the partition end
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select
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count() over (partition by intDiv(number, 3)
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rows between 100 following and unbounded following),
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count() over (partition by intDiv(number, 3)
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rows between current row and 100 following)
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from numbers(10);
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-- seen a use-after-free under MSan in this query once
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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;
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-- a corner case
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select count() over ();
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-- RANGE CURRENT ROW frame start
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select number, p, o,
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count(*) over (partition by p order by o
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range between current row and unbounded following)
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from (select number, intDiv(number, 5) p, mod(number, 3) o
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from numbers(31))
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order by p, o, number
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settings max_block_size = 2;
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select
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count(*) over (rows between current row and current row),
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count(*) over (range between current row and current row)
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from numbers(3);
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-- RANGE OFFSET
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-- a basic RANGE OFFSET frame
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select x, min(x) over w, max(x) over w, count(x) over w from (
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select toUInt8(number) x from numbers(11))
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window w as (order by x asc range between 1 preceding and 2 following)
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order by x;
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-- overflow conditions
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select x, min(x) over w, max(x) over w, count(x) over w
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from (
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select toUInt8(if(mod(number, 2),
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toInt64(255 - intDiv(number, 2)),
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toInt64(intDiv(number, 2)))) x
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from numbers(10)
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)
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window w as (order by x range between 1 preceding and 2 following)
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order by x;
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select x, min(x) over w, max(x) over w, count(x) over w
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from (
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select toInt8(multiIf(
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mod(number, 3) == 0, toInt64(intDiv(number, 3)),
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mod(number, 3) == 1, toInt64(127 - intDiv(number, 3)),
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toInt64(-128 + intDiv(number, 3)))) x
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from numbers(15)
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)
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window w as (order by x range between 1 preceding and 2 following)
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order by x;
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-- We need large offsets to trigger overflow to positive direction, or
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-- else the frame end runs into partition end w/o overflow and doesn't move
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-- after that. The frame from this query is equivalent to the entire partition.
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select x, min(x) over w, max(x) over w, count(x) over w
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from (
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select toUInt8(if(mod(number, 2),
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toInt64(255 - intDiv(number, 2)),
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toInt64(intDiv(number, 2)))) x
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from numbers(10)
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)
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window w as (order by x range between 255 preceding and 255 following)
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order by x;
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-- RANGE OFFSET ORDER BY DESC
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select x, min(x) over w, max(x) over w, count(x) over w from (
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select toUInt8(number) x from numbers(11)) t
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window w as (order by x desc range between 1 preceding and 2 following)
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order by x
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settings max_block_size = 1;
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select x, min(x) over w, max(x) over w, count(x) over w from (
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select toUInt8(number) x from numbers(11)) t
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window w as (order by x desc range between 1 preceding and unbounded following)
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order by x
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settings max_block_size = 2;
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select x, min(x) over w, max(x) over w, count(x) over w from (
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select toUInt8(number) x from numbers(11)) t
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window w as (order by x desc range between unbounded preceding and 2 following)
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order by x
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settings max_block_size = 3;
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select x, min(x) over w, max(x) over w, count(x) over w from (
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select toUInt8(number) x from numbers(11)) t
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window w as (order by x desc range between unbounded preceding and 2 preceding)
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order by x
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settings max_block_size = 4;
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-- Check that we put windows in such an order that we can reuse the sort.
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-- First, check that at least the result is correct when we have many windows
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-- with different sort order.
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select
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number,
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count(*) over (partition by p order by number),
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count(*) over (partition by p order by number, o),
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count(*) over (),
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count(*) over (order by number),
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count(*) over (order by o),
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count(*) over (order by o, number),
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count(*) over (order by number, o),
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count(*) over (partition by p order by o, number),
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count(*) over (partition by p),
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count(*) over (partition by p order by o),
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count(*) over (partition by p, o order by number)
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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(16)) t
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order by number
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;
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-- The EXPLAIN for the above query would be difficult to understand, so check some
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-- simple cases instead.
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explain select
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count(*) over (partition by p),
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count(*) over (),
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count(*) over (partition by p order by o)
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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(16)) t
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;
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explain select
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count(*) over (order by o, number),
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count(*) over (order by number)
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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(16)) t
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;
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-- A test case for the sort comparator found by fuzzer.
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SELECT
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max(number) OVER (ORDER BY number DESC NULLS FIRST),
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max(number) OVER (ORDER BY number ASC NULLS FIRST)
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FROM numbers(2)
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;
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-- optimize_read_in_order conflicts with sorting for window functions, check that
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-- it is disabled.
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drop table if exists window_mt;
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create table window_mt engine MergeTree order by number
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as select number, mod(number, 3) p from numbers(100);
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select number, count(*) over (partition by p)
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from window_mt order by number limit 10 settings optimize_read_in_order = 0;
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select number, count(*) over (partition by p)
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from window_mt order by number limit 10 settings optimize_read_in_order = 1;
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drop table window_mt;
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-- some true window functions -- rank and friends
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select number, p, o,
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count(*) over w,
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rank() over w,
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dense_rank() over w,
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row_number() over w
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from (select number, intDiv(number, 5) p, mod(number, 3) o
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from numbers(31) order by o, number) t
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window w as (partition by p order by o, number)
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order by p, o, number
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settings max_block_size = 2;
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-- our replacement for lag/lead
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select
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anyOrNull(number)
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over (order by number rows between 1 preceding and 1 preceding),
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anyOrNull(number)
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over (order by number rows between 1 following and 1 following)
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from numbers(5);
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-- variants of lag/lead that respect the frame
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select number, p, pp,
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lagInFrame(number) over w as lag1,
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lagInFrame(number, number - pp) over w as lag2,
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lagInFrame(number, number - pp, number * 11) over w as lag,
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leadInFrame(number, number - pp, number * 11) over w as lead
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from (select number, intDiv(number, 5) p, p * 5 pp from numbers(16))
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window w as (partition by p order by number
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rows between unbounded preceding and unbounded following)
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order by number
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settings max_block_size = 3;
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;
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-- careful with auto-application of Null combinator
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select lagInFrame(toNullable(1)) over ();
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select lagInFrameOrNull(1) over (); -- { serverError 36 }
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-- this is the same as `select max(Null::Nullable(Nothing))`
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select intDiv(1, NULL) x, toTypeName(x), max(x) over ();
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-- to make lagInFrame return null for out-of-frame rows, cast the argument to
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-- Nullable; otherwise, it returns default values.
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SELECT
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number,
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lagInFrame(toNullable(number), 1) OVER w,
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lagInFrame(toNullable(number), 2) OVER w,
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lagInFrame(number, 1) OVER w,
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lagInFrame(number, 2) OVER w
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FROM numbers(4)
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WINDOW w AS (ORDER BY number ASC)
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;
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-- case-insensitive SQL-standard synonyms for any and anyLast
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select
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number,
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fIrSt_VaLue(number) over w,
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lAsT_vAlUe(number) over w
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from numbers(10)
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window w as (order by number range between 1 preceding and 1 following)
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order by number
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;
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-- nth_value without specific frame range given
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select
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number,
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nth_value(number, 1) over w as firstValue,
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nth_value(number, 2) over w as secondValue,
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nth_value(number, 3) over w as thirdValue,
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nth_value(number, 4) over w as fourthValue
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from numbers(10)
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window w as (order by number)
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order by number
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;
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-- nth_value with frame range specified
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select
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number,
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nth_value(number, 1) over w as firstValue,
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nth_value(number, 2) over w as secondValue,
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nth_value(number, 3) over w as thirdValue,
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nth_value(number, 4) over w as fourthValue
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from numbers(10)
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window w as (order by number range between 1 preceding and 1 following)
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order by number
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;
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-- to make nth_value return null for out-of-frame rows, cast the argument to
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-- Nullable; otherwise, it returns default values.
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SELECT
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number,
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nth_value(toNullable(number), 1) OVER w as firstValue,
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nth_value(toNullable(number), 3) OVER w as thridValue
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FROM numbers(5)
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WINDOW w AS (ORDER BY number ASC)
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;
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-- nth_value UBsan
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SELECT nth_value(1, -1) OVER (); -- { serverError BAD_ARGUMENTS }
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SELECT nth_value(1, 0) OVER (); -- { serverError BAD_ARGUMENTS }
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SELECT nth_value(1, /* INT64_MAX+1 */ 0x7fffffffffffffff+1) OVER (); -- { serverError BAD_ARGUMENTS }
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SELECT nth_value(1, /* INT64_MAX */ 0x7fffffffffffffff) OVER ();
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SELECT nth_value(1, 1) OVER ();
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-- lagInFrame UBsan
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SELECT lagInFrame(1, -1) OVER (); -- { serverError BAD_ARGUMENTS }
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SELECT lagInFrame(1, 0) OVER ();
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SELECT lagInFrame(1, /* INT64_MAX+1 */ 0x7fffffffffffffff+1) OVER (); -- { serverError BAD_ARGUMENTS }
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SELECT lagInFrame(1, /* INT64_MAX */ 0x7fffffffffffffff) OVER ();
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SELECT lagInFrame(1, 1) OVER ();
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-- leadInFrame UBsan
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SELECT leadInFrame(1, -1) OVER (); -- { serverError BAD_ARGUMENTS }
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SELECT leadInFrame(1, 0) OVER ();
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SELECT leadInFrame(1, /* INT64_MAX+1 */ 0x7fffffffffffffff+1) OVER (); -- { serverError BAD_ARGUMENTS }
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SELECT leadInFrame(1, /* INT64_MAX */ 0x7fffffffffffffff) OVER ();
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SELECT leadInFrame(1, 1) OVER ();
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-- nth_value Msan
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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;
|
|
|
|
-- 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)
|
|
;
|
|
|
|
-- 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;
|
|
|
|
-- 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
|
|
)
|
|
);
|
|
|
|
-- -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
|
|
;
|
|
|
|
-- 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 ();
|
|
|
|
-- nonexistent parent window
|
|
select count() over (w2 rows unbounded preceding); -- { serverError 36 }
|