# name: test/sql/aggregate/grouping_sets/cube.test
# description: Test CUBE
# group: [grouping_sets]

statement ok
SET default_null_order='nulls_first';

statement ok
PRAGMA enable_verification

statement ok
create table students (course VARCHAR, type VARCHAR, highest_grade INTEGER);

statement ok
insert into students
		(course, type, highest_grade)
	values
		('CS', 'Bachelor', 8),
		('CS', 'Bachelor', 8),
		('CS', 'PhD', 10),
		('Math', 'Masters', NULL),
		('CS', NULL, 7),
		('CS', NULL, 7),
		('Math', NULL, 8);

query II
select course, count(*) from students group by cube (course) order by 1, 2;
----
NULL	7
CS	5
Math	2

query III
select course, type, count(*) from students group by cube (course, type) order by 1, 2, 3;
----
NULL	NULL	3
NULL	NULL	7
NULL	Bachelor	2
NULL	Masters	1
NULL	PhD	1
CS	NULL	2
CS	NULL	5
CS	Bachelor	2
CS	PhD	1
Math	NULL	1
Math	NULL	2
Math	Masters	1

# if we have brackets in a CUBE group, it counts as one unit within the CUBE statement
# i.e. in this case (course, type) are not cubed up
query III
select course, type, count(*) from students group by cube ((course, type)) order by 1, 2, 3;
----
NULL	NULL	7
CS	NULL	2
CS	Bachelor	2
CS	PhD	1
Math	NULL	1
Math	Masters	1

# duplicate group expressions in cube
query III
select course, type, count(*) from students group by cube (course, type, course) order by 1, 2, 3;
----
NULL	NULL	3
NULL	NULL	7
NULL	Bachelor	2
NULL	Masters	1
NULL	PhD	1
CS	NULL	2
CS	NULL	2
CS	NULL	2
CS	NULL	5
CS	NULL	5
CS	NULL	5
CS	Bachelor	2
CS	Bachelor	2
CS	Bachelor	2
CS	PhD	1
CS	PhD	1
CS	PhD	1
Math	NULL	1
Math	NULL	1
Math	NULL	1
Math	NULL	2
Math	NULL	2
Math	NULL	2
Math	Masters	1
Math	Masters	1
Math	Masters	1

query IIII
select course, type, highest_grade, count(*) from students group by cube (course, type, highest_grade) order by 1, 2, 3, 4;
----
NULL	NULL	NULL	1
NULL	NULL	NULL	3
NULL	NULL	NULL	7
NULL	NULL	7	2
NULL	NULL	7	2
NULL	NULL	8	1
NULL	NULL	8	3
NULL	NULL	10	1
NULL	Bachelor	NULL	2
NULL	Bachelor	8	2
NULL	Masters	NULL	1
NULL	Masters	NULL	1
NULL	PhD	NULL	1
NULL	PhD	10	1
CS	NULL	NULL	2
CS	NULL	NULL	5
CS	NULL	7	2
CS	NULL	7	2
CS	NULL	8	2
CS	NULL	10	1
CS	Bachelor	NULL	2
CS	Bachelor	8	2
CS	PhD	NULL	1
CS	PhD	10	1
Math	NULL	NULL	1
Math	NULL	NULL	1
Math	NULL	NULL	2
Math	NULL	8	1
Math	NULL	8	1
Math	Masters	NULL	1
Math	Masters	NULL	1

# multiple cubes ups causes a cross product of them
query III
select course, type, count(*) from students group by cube (course), cube (type) order by 1, 2, 3;
----
NULL	NULL	3
NULL	NULL	7
NULL	Bachelor	2
NULL	Masters	1
NULL	PhD	1
CS	NULL	2
CS	NULL	5
CS	Bachelor	2
CS	PhD	1
Math	NULL	1
Math	NULL	2
Math	Masters	1

query III
select course as crs, type, count(*) from students group by cube (crs), (), type order by 1, 2, 3;
----
NULL	NULL	3
NULL	Bachelor	2
NULL	Masters	1
NULL	PhD	1
CS	NULL	2
CS	Bachelor	2
CS	PhD	1
Math	NULL	1
Math	Masters	1

# we can also use cube within a grouping set
query III
select course as crs, type as tp, count(*) from students group by grouping sets (cube (crs)), (), tp order by 1, 2, 3;
----
NULL	NULL	3
NULL	Bachelor	2
NULL	Masters	1
NULL	PhD	1
CS	NULL	2
CS	Bachelor	2
CS	PhD	1
Math	NULL	1
Math	Masters	1

statement error
select course, count(*) from students group by cube () order by 1, 2;
----

statement error
select course, count(*) from students group by cube (cube (course)) order by 1, 2;
----

statement error
select course, count(*) from students group by cube (grouping_sets (course)) order by 1, 2;
----

# cube exceeds maximum grouping set
statement error
select course, type, count(*) from students group by cube (course, type, course, type, course, type, course, type, course, type, course, type, (course, type), (course, type), course, type) order by 1, 2, 3;
----

statement error
select course, type, count(*) from students group by cube (course, type, course, type, course), cube(type, course, type, course), cube(type, course, type, (course, type), (course, type), course, type) order by 1, 2, 3;
----