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# name: test/sql/window/test_mode_window.test
# description: Test MODE aggregate as a window function
# group: [window]
statement ok
SET default_null_order='nulls_first';
statement ok
PRAGMA enable_verification
statement ok
PRAGMA verify_external
statement ok
create table modes as select range r from range(10) union all values (NULL), (NULL), (NULL);
query IIII
SELECT r % 2, r, r//3, mode(r//3) over (partition by r % 2 order by r) FROM modes ORDER BY 1, 2
----
NULL NULL NULL NULL
NULL NULL NULL NULL
NULL NULL NULL NULL
0 0 0 0
0 2 0 0
0 4 1 0
0 6 2 0
0 8 2 0
1 1 0 0
1 3 1 0
1 5 1 1
1 7 2 1
1 9 3 1
query III
SELECT r, r//3, mode(r//3) over (order by r rows between 1 preceding and 1 following)
FROM modes
ORDER BY ALL
----
NULL NULL NULL
NULL NULL NULL
NULL NULL 0
0 0 0
1 0 0
2 0 0
3 1 1
4 1 1
5 1 1
6 2 2
7 2 2
8 2 2
9 3 2
query III
SELECT r, r//3, mode(r//3) over (order by r rows between 1 preceding and 3 following) FROM modes ORDER BY 1, 2
----
NULL NULL 0
NULL NULL 0
NULL NULL 0
0 0 0
1 0 0
2 0 1
3 1 1
4 1 1
5 1 2
6 2 2
7 2 2
8 2 2
9 3 2
# Scattered NULLs
query IIII
SELECT r, r // 3, n, mode(n) over (partition by r % 3 order by r)
FROM (SELECT r, CASE r % 2 WHEN 0 THEN r ELSE NULL END AS n FROM modes) nulls
ORDER BY 1
----
NULL NULL NULL NULL
NULL NULL NULL NULL
NULL NULL NULL NULL
0 0 0 0
1 0 NULL NULL
2 0 2 2
3 1 NULL 0
4 1 4 4
5 1 NULL 2
6 2 6 0
7 2 NULL 4
8 2 8 2
9 3 NULL 0
query III
SELECT r, n, mode(n) over (order by r rows between 1 preceding and 1 following)
FROM (SELECT r, CASE r % 2 WHEN 0 THEN r ELSE NULL END AS n FROM modes) nulls
ORDER BY ALL
----
NULL NULL NULL
NULL NULL NULL
NULL NULL 0
0 0 0
1 NULL 0
2 2 2
3 NULL 2
4 4 4
5 NULL 4
6 6 6
7 NULL 6
8 8 8
9 NULL 8
query III
SELECT r, n, mode(n) over (order by r rows between 1 preceding and 3 following)
FROM (SELECT r, CASE r % 2 WHEN 0 THEN r ELSE NULL END AS n FROM modes) nulls
ORDER BY 1
----
NULL NULL 0
NULL NULL 0
NULL NULL 0
0 0 0
1 NULL 0
2 2 2
3 NULL 2
4 4 4
5 NULL 4
6 6 6
7 NULL 6
8 8 8
9 NULL 8
query III
SELECT r, n, mode(n) over (order by r rows between unbounded preceding and unbounded following)
FROM (SELECT r, CASE r % 2 WHEN 0 THEN r ELSE NULL END AS n FROM modes) nulls
ORDER BY 1
----
NULL NULL 0
NULL NULL 0
NULL NULL 0
0 0 0
1 NULL 0
2 2 0
3 NULL 0
4 4 0
5 NULL 0
6 6 0
7 NULL 0
8 8 0
9 NULL 0
#
# Compare implementations
#
foreach windowmode "window" "combine" "separate"
statement ok
PRAGMA debug_window_mode=${windowmode}
query III
WITH t(r) AS (VALUES (0), (1), (2), (3), (4), (5), (6), (7), (8), (9), (NULL), (NULL), (NULL))
SELECT r, r//3, mode(r//3) over (order by r rows between 1 preceding and 1 following)
FROM t
ORDER BY ALL
----
NULL NULL NULL
NULL NULL NULL
NULL NULL 0
0 0 0
1 0 0
2 0 0
3 1 1
4 1 1
5 1 1
6 2 2
7 2 2
8 2 2
9 3 2
endloop
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