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18c50c11b3
* feat: Preserve number of streams after evaluation the window functions to allow parallel stream processing * fix style * fix style * fix style * setting query_plan_preserve_num_streams_after_window_functions default true * fix tests by SETTINGS query_plan_preserve_num_streams_after_window_functions=0 * fix test references * Resize the streams after the last window function, to keep the order between WindowTransforms (and WindowTransform works on single stream anyway). * feat: Preserve number of streams after evaluation the window functions to allow parallel stream processing * fix style * fix style * fix style * setting query_plan_preserve_num_streams_after_window_functions default true * fix tests by SETTINGS query_plan_preserve_num_streams_after_window_functions=0 * fix test references * Resize the streams after the last window function, to keep the order between WindowTransforms (and WindowTransform works on single stream anyway). * add perf test * perf: change the dataset from 50M to 5M * rename query_plan_preserve_num_streams_after_window_functions -> query_plan_enable_multithreading_after_window_functions * update test reference * fix clang-tidy --------- Co-authored-by: Nikita Taranov <nikita.taranov@clickhouse.com>
73 lines
1.8 KiB
Plaintext
73 lines
1.8 KiB
Plaintext
-- { echo }
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-- Another test for window functions because the other one is too long.
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-- some craziness with a mix of materialized and unmaterialized const columns
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-- after merging sorted transform, that used to break the peer group detection in
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-- the window transform.
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CREATE TABLE order_by_const
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(
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`a` UInt64,
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`b` UInt64,
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`c` UInt64,
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`d` UInt64
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)
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ENGINE = MergeTree
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ORDER BY (a, b)
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SETTINGS index_granularity = 8192;
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truncate table order_by_const;
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system stop merges order_by_const;
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INSERT INTO order_by_const(a, b, c, d) VALUES (1, 1, 101, 1), (1, 2, 102, 1), (1, 3, 103, 1), (1, 4, 104, 1);
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INSERT INTO order_by_const(a, b, c, d) VALUES (1, 5, 104, 1), (1, 6, 105, 1), (2, 1, 106, 2), (2, 1, 107, 2);
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INSERT INTO order_by_const(a, b, c, d) VALUES (2, 2, 107, 2), (2, 3, 108, 2), (2, 4, 109, 2);
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-- output 1 sorted stream
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SELECT row_number() OVER (order by 1, a) FROM order_by_const SETTINGS query_plan_enable_multithreading_after_window_functions=0;
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1
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2
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drop table order_by_const;
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-- expressions in window frame
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select count() over (rows between 1 + 1 preceding and 1 + 1 following) from numbers(10);
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3
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4
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5
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5
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5
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5
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5
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5
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4
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3
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-- signed and unsigned in offset do not cause logical error
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select count() over (rows between 2 following and 1 + -1 following) FROM numbers(10); -- { serverError 36 }
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-- default arguments of lagInFrame can be a subtype of the argument
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select number,
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lagInFrame(toNullable(number), 2, null) over w,
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lagInFrame(number, 2, 1) over w
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from numbers(10)
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window w as (order by number)
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;
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0 \N 1
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1 \N 1
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2 0 0
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3 1 1
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4 2 2
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5 3 3
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6 4 4
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7 5 5
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8 6 6
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9 7 7
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-- the case when current_row goes past the partition end at the block end
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select number, row_number() over (partition by number rows between unbounded preceding and 1 preceding) from numbers(4) settings max_block_size = 2;
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0 1
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1 1
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2 1
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3 1
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