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show status like '%window%';
Variable_name Value
Feature_window_functions 0
create table t1 (a int, b int);
insert into t1 values (1, 10), (2, 20), (3, 30);
select a, b, rank() over (order by a) from t1;
a b rank() over (order by a)
1 10 1
2 20 2
3 30 3
show status like '%window%';
Variable_name Value
Feature_window_functions 1
select a, b, rank() over (order by a), sum(a) over (order by a) from t1;
a b rank() over (order by a) sum(a) over (order by a)
1 10 1 1
2 20 2 3
3 30 3 6
show status like '%window%';
Variable_name Value
Feature_window_functions 2
select t_a.r1, t_b.r2
from (select a, b, rank() over (order by a) as r1 from t1) t_a,
(select a, b, row_number() over (order by a) as r2 from t1) t_b;
r1 r2
1 1
1 2
1 3
2 1
2 2
2 3
3 1
3 2
3 3
show status like '%window%';
Variable_name Value
Feature_window_functions 4
drop table t1;
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