# name: test/sql/window/test_window_clause.test
# description: Test window clauses and overrides
# group: [window]

statement ok
PRAGMA enable_verification

statement ok
create table integers as select range i from range(0,16);

# if a window clause is not being read, these would return 16
query IIII
select max(base), max(referenced), sum(refined), sum(unrefined) from (
    select
    	row_number() over w AS base,
    	row_number() over (w) as referenced,
    	sum(i % 4) over (w rows between 1 preceding and 1 following) AS refined,
    	sum(i % 4) over (rows between 1 preceding and 1 following) AS unrefined
    from integers
    WINDOW w AS (partition by i // 4 order by i % 4)
) q;
----
4	4	60	69

#
# Clause overrides
#
query IIII
select 
  x, y, 
  count(*) over (partition by y order by x), 
  count(*) over (w order by x)
from (values (1, 1), (2, 1), (3, 2), (4, 2)) as t (x, y)
window w as (partition by y)
order by x
----
1	1	1	1
2	1	2	2
3	2	1	1
4	2	2	2

statement error
select 
  x, y, 
  count(*) over (partition by y order by x), 
  count(*) over (w order by x)
from (values (1, 1), (2, 1), (3, 2), (4, 2)) as t (x, y)
window w as (partition by y order by x desc)
order by x
----
Cannot override ORDER BY clause of window "w"

statement error
select 
  x, y, 
  count(*) over (partition by y order by x), 
  count(*) over (w partition by y)
from (values (1, 1), (2, 1), (3, 2), (4, 2)) as t (x, y)
window w as (partition by x)
order by x
----
Cannot override PARTITION BY clause of window "w"

statement error
select i, sum(i) over (w) as smoothed 
from integers 
window w AS (order by i rows between 1 preceding and 1 following) 
order by i;
----
frame clause

# Case insensitivity
statement error
SELECT sum(1) over cumulativeSum 
FROM integers 
WINDOW cumulativeSum AS (), 
	cumulativesum AS (order by i rows between 1 preceding and 1 following);
----
already defined

statement ok
SELECT sum(i) over cumulativeSum 
FROM integers 
WINDOW cumulativeSum AS ();