drop table if exists t1,t2;
drop view if exists v1;
# ########################################################################
# # Parser tests
# ########################################################################
#
#  Check what happens when one attempts to use window function without OVER clause
create table t1 (a int, b int);
insert into t1 values (1,1),(2,2);
select row_number() from t1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'from t1' at line 1
select rank() from t1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'from t1' at line 1
# Attempt to use window function in the WHERE clause
select * from t1 where 1=rank() over (order by a);
ERROR HY000: Window function is allowed only in SELECT list and ORDER BY clause
select * from t1 where 1>row_number() over (partition by b order by a);
ERROR HY000: Window function is allowed only in SELECT list and ORDER BY clause
drop table t1;
# ########################################################################
# # Functionality tests
# ########################################################################
#
#  Check if ROW_NUMBER() works in basic cases
create table t1(a int, b int, x char(32));
insert into t1 values (2, 10, 'xx');
insert into t1 values (2, 10, 'zz');
insert into t1 values (2, 20, 'yy');
insert into t1 values (3, 10, 'xxx');
insert into t1 values (3, 20, 'vvv');
select a, row_number() over (partition by a order by b) from t1;
a	row_number() over (partition by a order by b)
2	1
2	2
2	3
3	1
3	2
select a, b, x, row_number() over (partition by a order by x) from t1;
a	b	x	row_number() over (partition by a order by x)
2	10	xx	1
2	20	yy	2
2	10	zz	3
3	20	vvv	1
3	10	xxx	2
drop table t1;
create table t1 (pk int primary key, a int, b int);
insert into t1 values
(1, 10, 22),
(2, 11, 21),
(3, 12, 20),
(4, 13, 19),
(5, 14, 18);
select
pk, a, b,
row_number() over (order by a),
row_number() over (order by b)
from t1
order by b;
pk	a	b	row_number() over (order by a)	row_number() over (order by b)
5	14	18	5	1
4	13	19	4	2
3	12	20	3	3
2	11	21	2	4
1	10	22	1	5
drop table t1;
#
# Try RANK() function
#
create table t2 (
pk int primary key,
a int
);
insert into t2 values
( 1 , 0),
( 2 , 0),
( 3 , 1),
( 4 , 1),
( 8 , 2),
( 5 , 2),
( 6 , 2),
( 7 , 2),
( 9 , 4),
(10 , 4);
select pk, a, rank() over (order by a) from t2;
pk	a	rank() over (order by a)
1	0	1
10	4	9
2	0	1
3	1	3
4	1	3
5	2	5
6	2	5
7	2	5
8	2	5
9	4	9
select pk, a, rank() over (order by a desc) from t2;
pk	a	rank() over (order by a desc)
1	0	9
10	4	1
2	0	9
3	1	7
4	1	7
5	2	3
6	2	3
7	2	3
8	2	3
9	4	1
drop table t2;
#
# Try Aggregates as window functions. With frames.
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (pk int, c int);
insert into t1 select a+1,1 from t0;
update t1 set c=2 where pk not in (1,2,3,4);
select * from t1;
pk	c
1	1
2	1
3	1
4	1
5	2
6	2
7	2
8	2
9	2
10	2
select
pk, c,
count(*) over (partition by c order by pk
rows between 2 preceding and 2 following) as CNT
from t1;
pk	c	CNT
1	1	3
2	1	4
3	1	4
4	1	3
5	2	3
6	2	4
7	2	5
8	2	5
9	2	4
10	2	3
select
pk, c,
count(*) over (partition by c order by pk
rows between 1 preceding and 2 following) as CNT
from t1;
pk	c	CNT
1	1	3
2	1	4
3	1	3
4	1	2
5	2	3
6	2	4
7	2	4
8	2	4
9	2	3
10	2	2
select
pk, c,
count(*) over (partition by c order by pk
rows between 2 preceding and current row) as CNT
from t1;
pk	c	CNT
1	1	1
2	1	2
3	1	3
4	1	3
5	2	1
6	2	2
7	2	3
8	2	3
9	2	3
10	2	3
select
pk,c,
count(*) over (partition by c order by pk rows
between 1 following and 2 following) as CNT
from t1;
pk	c	CNT
1	1	2
2	1	2
3	1	1
4	1	0
5	2	2
6	2	2
7	2	2
8	2	2
9	2	1
10	2	0
select
pk,c,
count(*) over (partition by c order by pk rows
between 2 preceding and 1 preceding) as CNT
from t1;
pk	c	CNT
1	1	0
2	1	1
3	1	2
4	1	2
5	2	0
6	2	1
7	2	2
8	2	2
9	2	2
10	2	2
select
pk, c,
count(*) over (partition by c order by pk
rows between current row and 1 following) as CNT
from t1;
pk	c	CNT
1	1	2
2	1	2
3	1	2
4	1	1
5	2	2
6	2	2
7	2	2
8	2	2
9	2	2
10	2	1
# Check ORDER BY DESC
select
pk, c,
count(*) over (partition by c order by pk desc
rows between 2 preceding and 2 following) as CNT
from t1;
pk	c	CNT
4	1	3
3	1	4
2	1	4
1	1	3
10	2	3
9	2	4
8	2	5
7	2	5
6	2	4
5	2	3
drop table t0,t1;
#
# Resolution of window names
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (pk int, c int);
insert into t1 select a+1,1 from t0;
update t1 set c=2 where pk not in (1,2,3,4);
select * from t1;
pk	c
1	1
2	1
3	1
4	1
5	2
6	2
7	2
8	2
9	2
10	2
select
pk, c,
count(*) over w1 as CNT
from t1
window w1 as (partition by c order by pk
rows between 2 preceding and 2 following);
pk	c	CNT
1	1	3
2	1	4
3	1	4
4	1	3
5	2	3
6	2	4
7	2	5
8	2	5
9	2	4
10	2	3
select
pk, c,
count(*) over (w1 rows between 2 preceding and 2 following) as CNT
from t1
window w1 as (partition by c order by pk);
pk	c	CNT
1	1	3
2	1	4
3	1	4
4	1	3
5	2	3
6	2	4
7	2	5
8	2	5
9	2	4
10	2	3
select
pk, c,
count(*) over (w1 order by pk rows between 2 preceding and 2 following) as CNT
from t1
window w1 as (partition by c);
pk	c	CNT
1	1	3
2	1	4
3	1	4
4	1	3
5	2	3
6	2	4
7	2	5
8	2	5
9	2	4
10	2	3
select
pk, c,
count(*) over (w2 rows between 2 preceding and 2 following) as CNT
from t1
window w1 as (partition by c), w2 as (w1 order by pk);
pk	c	CNT
1	1	3
2	1	4
3	1	4
4	1	3
5	2	3
6	2	4
7	2	5
8	2	5
9	2	4
10	2	3
select
pk, c,
count(*) over w3 as CNT
from t1
window
w1 as (partition by c),
w2 as (w1 order by pk),
w3 as (w2 rows between 2 preceding and 2 following);
pk	c	CNT
1	1	3
2	1	4
3	1	4
4	1	3
5	2	3
6	2	4
7	2	5
8	2	5
9	2	4
10	2	3
select
pk, c,
count(*) over w as CNT
from t1
window w1 as (partition by c order by pk
rows between 2 preceding and 2 following);
ERROR HY000: Window specification with name 'w' is not defined
select
pk, c,
count(*) over (w2 rows between 2 preceding and 2 following) as CNT
from t1
window w1 as (partition by c), w1 as (order by pk);
ERROR HY000: Multiple window specifications with the same name 'w1'
select
pk, c,
count(*) over (w2 rows between 2 preceding and 2 following) as CNT
from t1
window w1 as (partition by c), w2 as (w partition by c order by pk);
ERROR HY000: Window specification with name 'w' is not defined
select
pk, c,
count(*) over (w2 rows between 2 preceding and 2 following) as CNT
from t1
window w1 as (partition by c), w2 as (w1 partition by c order by pk);
ERROR HY000: Window specification referencing another one 'w1' cannot contain partition list
select
pk, c,
count(*) over (w2 rows between 2 preceding and 2 following) as CNT
from t1
window w1 as (partition by c order by pk), w2 as (w1 order by pk);
ERROR HY000: Referenced window specification 'w1' already contains order list
select
pk, c,
count(*) over w3 as CNT
from t1
window
w1 as (partition by c),
w2 as (w1 order by pk rows between 3 preceding and 2 following),
w3 as (w2 rows between 2 preceding and 2 following);
ERROR HY000: Referenced window specification 'w2' cannot contain window frame
select
pk, c,
count(*) over w1 as CNT
from t1
window w1 as (partition by c order by pk
rows between unbounded following and 2 following);
ERROR HY000: Unacceptable combination of window frame bound specifications
select
pk, c,
count(*) over (w1 rows between 2 preceding and unbounded preceding) as CNT
from t1
window w1 as (partition by c order by pk);
ERROR HY000: Unacceptable combination of window frame bound specifications
select
pk, c,
count(*) over (w1 order by pk rows between current row and 2 preceding) as CNT
from t1
window w1 as (partition by c);
ERROR HY000: Unacceptable combination of window frame bound specifications
select
pk, c,
count(*) over (w2 rows between 2 following and current row) as CNT
from t1
window w1 as (partition by c), w2 as (w1 order by pk);
ERROR HY000: Unacceptable combination of window frame bound specifications
select
pk, c
from t1 where rank() over w1 > 2
window w1 as (partition by c order by pk);
ERROR HY000: Window function is allowed only in SELECT list and ORDER BY clause
select
c, max(pk) as m
from t1
group by c + rank() over w1
window w1 as (order by m);
ERROR HY000: Window function is allowed only in SELECT list and ORDER BY clause
select
c, max(pk) as m, rank() over w1 as r
from t1
group by c+r
window w1 as (order by m);
ERROR HY000: Window function is allowed only in SELECT list and ORDER BY clause
select
c, max(pk) as m, rank() over w1 as r
from t1
group by c having c+r > 3
window w1 as (order by m);
ERROR HY000: Window function is allowed only in SELECT list and ORDER BY clause
select
c, max(pk) as m, rank() over w1 as r,
rank() over (partition by r+1 order by m)
from t1
group by c
window w1 as (order by m);
ERROR HY000: Window function is not allowed in window specification
select
c, max(pk) as m, rank() over w1 as r,
rank() over (partition by m order by r)
from t1
group by c
window w1 as (order by m);
ERROR HY000: Window function is not allowed in window specification
select
c, max(pk) as m, rank() over w1 as r, dense_rank() over w2 as dr
from t1
group by c
window w1 as (order by m), w2 as (partition by r order by m);
ERROR HY000: Window function is not allowed in window specification
select
pk, c,
row_number() over (partition by c order by pk
range between unbounded preceding and current row) as r
from t1;
ERROR HY000: Window frame is not allowed with 'row_number'
select
pk, c,
rank() over w1 as r
from t1
window w1 as (partition by c order by pk
rows between 2 preceding and 2 following);
ERROR HY000: Window frame is not allowed with 'rank'
select
pk, c,
dense_rank() over (partition by c order by pk
rows between 1 preceding and 1 following) as r
from t1;
ERROR HY000: Window frame is not allowed with 'dense_rank'
select
pk, c,
rank() over w1 as r
from t1
window w1 as (partition by c);
ERROR HY000: No order list in window specification for 'rank'
select
pk, c,
dense_rank() over (partition by c) as r
from t1;
ERROR HY000: No order list in window specification for 'dense_rank'
drop table t0,t1;
#
# MDEV-9634: Window function produces incorrect value
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (part_id int, pk int, a int);
insert into t2 select
if(a<5, 0, 1), a, if(a<5, NULL, 1) from t0;
select * from t2;
part_id	pk	a
0	0	NULL
0	1	NULL
0	2	NULL
0	3	NULL
0	4	NULL
1	5	1
1	6	1
1	7	1
1	8	1
1	9	1
select
part_id, pk, a,
count(a) over (partition by part_id order by pk
rows between 1 preceding and 1 following) as CNT
from t2;
part_id	pk	a	CNT
0	0	NULL	0
0	1	NULL	0
0	2	NULL	0
0	3	NULL	0
0	4	NULL	0
1	5	1	2
1	6	1	3
1	7	1	3
1	8	1	3
1	9	1	2
drop table t0, t2;
#
#  RANGE-type bounds
#
create table t3 (
pk int,
val int
);
insert into t3 values
(0, 1),
(1, 1),
(2, 1),
(3, 2),
(4, 2),
(5, 2),
(6, 2);
select
val,
count(val) over (order by val
range between current row and
current row)
as CNT
from t3;
val	CNT
1	3
1	3
1	3
2	4
2	4
2	4
2	4
insert into t3 values
(7, 3),
(8, 3);
select
val,
count(val) over (order by val
range between current row and
current row)
as CNT
from t3;
val	CNT
1	3
1	3
1	3
2	4
2	4
2	4
2	4
3	2
3	2
drop table t3;
# Now, check with PARTITION BY
create table t4 (
part_id int,
pk int,
val int
);
insert into t4 values
(1234, 100, 1),
(1234, 101, 1),
(1234, 102, 1),
(1234, 103, 2),
(1234, 104, 2),
(1234, 105, 2),
(1234, 106, 2),
(1234, 107, 3),
(1234, 108, 3),
(5678, 200, 1),
(5678, 201, 1),
(5678, 202, 1),
(5678, 203, 2),
(5678, 204, 2),
(5678, 205, 2),
(5678, 206, 2),
(5678, 207, 3),
(5678, 208, 3);
select
part_id,
val,
count(val) over (partition by part_id
order by val
range between current row and
current row)
as CNT
from t4;
part_id	val	CNT
1234	1	3
1234	1	3
1234	1	3
1234	2	4
1234	2	4
1234	2	4
1234	2	4
1234	3	2
1234	3	2
5678	1	3
5678	1	3
5678	1	3
5678	2	4
5678	2	4
5678	2	4
5678	2	4
5678	3	2
5678	3	2
#
# Try RANGE UNBOUNDED PRECEDING | FOLLOWING
#
select
part_id,
val,
count(val) over (partition by part_id
order by val
range between unbounded preceding and
current row)
as CNT
from t4;
part_id	val	CNT
1234	1	3
1234	1	3
1234	1	3
1234	2	7
1234	2	7
1234	2	7
1234	2	7
1234	3	9
1234	3	9
5678	1	3
5678	1	3
5678	1	3
5678	2	7
5678	2	7
5678	2	7
5678	2	7
5678	3	9
5678	3	9
select
part_id,
val,
count(val) over (partition by part_id
order by val
range between current row and
unbounded following)
as CNT
from t4;
part_id	val	CNT
1234	1	9
1234	1	9
1234	1	9
1234	2	6
1234	2	6
1234	2	6
1234	2	6
1234	3	2
1234	3	2
5678	1	9
5678	1	9
5678	1	9
5678	2	6
5678	2	6
5678	2	6
5678	2	6
5678	3	2
5678	3	2
select
part_id,
val,
count(val) over (partition by part_id
order by val
range between unbounded preceding and
unbounded following)
as CNT
from t4;
part_id	val	CNT
1234	1	9
1234	1	9
1234	1	9
1234	2	9
1234	2	9
1234	2	9
1234	2	9
1234	3	9
1234	3	9
5678	1	9
5678	1	9
5678	1	9
5678	2	9
5678	2	9
5678	2	9
5678	2	9
5678	3	9
5678	3	9
drop table t4;
#
# MDEV-9695: Wrong window frame when using RANGE BETWEEN N FOLLOWING AND PRECEDING
#
create table t1 (pk int, a int, b int);
insert into t1 values
( 1 , 0, 1),
( 2 , 0, 2),
( 3 , 1, 4),
( 4 , 1, 8),
( 5 , 2, 32),
( 6 , 2, 64),
( 7 , 2, 128),
( 8 , 2, 16);
select pk, a, b,
bit_or(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as bit_or
from t1;
pk	a	b	bit_or
1	0	1	3
2	0	2	3
3	1	4	12
4	1	8	12
5	2	32	96
6	2	64	224
7	2	128	208
8	2	16	144
# Extra ROWS n PRECEDING tests
select pk, a, b,
bit_or(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 PRECEDING) as bit_or
from t1;
pk	a	b	bit_or
1	0	1	0
2	0	2	1
3	1	4	0
4	1	8	4
5	2	32	0
6	2	64	32
7	2	128	64
8	2	16	128
drop table t1;
create table t2 (
pk int,
a int,
b int
);
insert into t2 values
( 1, 0, 1),
( 2, 0, 2),
( 3, 0, 4),
( 4, 0, 8),
( 5, 1, 16),
( 6, 1, 32),
( 7, 1, 64),
( 8, 1, 128),
( 9, 2, 256),
(10, 2, 512),
(11, 2, 1024),
(12, 2, 2048);
select pk, a, b,
bit_or(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 PRECEDING) as bit_or
from t2;
pk	a	b	bit_or
1	0	1	0
2	0	2	1
3	0	4	2
4	0	8	4
5	1	16	0
6	1	32	16
7	1	64	32
8	1	128	64
9	2	256	0
10	2	512	256
11	2	1024	512
12	2	2048	1024
select pk, a, b,
bit_or(b) over (partition by a order by pk ROWS BETWEEN 2 PRECEDING AND 2 PRECEDING) as bit_or
from t2;
pk	a	b	bit_or
1	0	1	0
2	0	2	0
3	0	4	1
4	0	8	2
5	1	16	0
6	1	32	0
7	1	64	16
8	1	128	32
9	2	256	0
10	2	512	0
11	2	1024	256
12	2	2048	512
select pk, a, b,
bit_or(b) over (partition by a order by pk ROWS BETWEEN 2 PRECEDING AND 1 PRECEDING) as bit_or
from t2;
pk	a	b	bit_or
1	0	1	0
2	0	2	1
3	0	4	3
4	0	8	6
5	1	16	0
6	1	32	16
7	1	64	48
8	1	128	96
9	2	256	0
10	2	512	256
11	2	1024	768
12	2	2048	1536
# Check CURRENT ROW
select pk, a, b,
bit_or(b) over (partition by a order by pk ROWS BETWEEN CURRENT ROW AND CURRENT ROW) as bit_or
from t2;
pk	a	b	bit_or
1	0	1	1
2	0	2	2
3	0	4	4
4	0	8	8
5	1	16	16
6	1	32	32
7	1	64	64
8	1	128	128
9	2	256	256
10	2	512	512
11	2	1024	1024
12	2	2048	2048
drop table t2;
#
# Try RANGE PRECEDING|FOLLWING n
#
create table t1 (
part_id int,
pk int,
a int
);
insert into t1 values
(10, 1, 1),
(10, 2, 2),
(10, 3, 4),
(10, 4, 8),
(10, 5,26),
(10, 6,27),
(10, 7,40),
(10, 8,71),
(10, 9,72);
select
pk, a,
count(a) over (ORDER BY a
RANGE BETWEEN UNBOUNDED PRECEDING
AND 10 FOLLOWING) as cnt
from t1;
pk	a	cnt
1	1	4
2	2	4
3	4	4
4	8	4
5	26	6
6	27	6
7	40	7
8	71	9
9	72	9
select
pk, a,
count(a) over (ORDER BY a DESC
RANGE BETWEEN UNBOUNDED PRECEDING
AND 10 FOLLOWING) as cnt
from t1;
pk	a	cnt
9	72	2
8	71	2
7	40	3
6	27	5
5	26	5
4	8	9
3	4	9
2	2	9
1	1	9
select
pk, a,
count(a) over (ORDER BY a
RANGE BETWEEN UNBOUNDED PRECEDING
AND 1 FOLLOWING) as cnt
from t1;
pk	a	cnt
1	1	2
2	2	2
3	4	3
4	8	4
5	26	6
6	27	6
7	40	7
8	71	9
9	72	9
select
pk, a,
count(a) over (ORDER BY a
RANGE BETWEEN UNBOUNDED PRECEDING
AND 10 PRECEDING) as cnt
from t1;
pk	a	cnt
1	1	0
2	2	0
3	4	0
4	8	0
5	26	4
6	27	4
7	40	6
8	71	7
9	72	7
select
pk, a,
count(a) over (ORDER BY a DESC
RANGE BETWEEN UNBOUNDED PRECEDING
AND 10 PRECEDING) as cnt
from t1;
pk	a	cnt
9	72	0
8	71	0
7	40	2
6	27	3
5	26	3
4	8	5
3	4	5
2	2	5
1	1	5
select
pk, a,
count(a) over (ORDER BY a
RANGE BETWEEN UNBOUNDED PRECEDING
AND 1 PRECEDING) as cnt
from t1;
pk	a	cnt
1	1	0
2	2	1
3	4	2
4	8	3
5	26	4
6	27	5
7	40	6
8	71	7
9	72	8
select
pk, a,
count(a) over (ORDER BY a
RANGE BETWEEN 1 PRECEDING
AND CURRENT ROW) as cnt
from t1;
pk	a	cnt
1	1	1
2	2	2
3	4	1
4	8	1
5	26	1
6	27	2
7	40	1
8	71	1
9	72	2
select
pk, a,
count(a) over (ORDER BY a DESC
RANGE BETWEEN 1 PRECEDING
AND CURRENT ROW) as cnt
from t1;
pk	a	cnt
9	72	1
8	71	2
7	40	1
6	27	1
5	26	2
4	8	1
3	4	1
2	2	1
1	1	2
select
pk, a,
count(a) over (ORDER BY a
RANGE BETWEEN 1 FOLLOWING
AND 3 FOLLOWING) as cnt
from t1;
pk	a	cnt
1	1	2
2	2	1
3	4	0
4	8	0
5	26	1
6	27	0
7	40	0
8	71	1
9	72	0
# Try CURRENT ROW with[out] DESC
select
pk, a,
count(a) over (ORDER BY a
RANGE BETWEEN CURRENT ROW
AND 1 FOLLOWING) as cnt
from t1;
pk	a	cnt
1	1	2
2	2	1
3	4	1
4	8	1
5	26	2
6	27	1
7	40	1
8	71	2
9	72	1
select
pk, a,
count(a) over (order by a desc
range between current row
and 1 following) as cnt
from t1;
pk	a	cnt
9	72	2
8	71	1
7	40	1
6	27	2
5	26	1
4	8	1
3	4	1
2	2	2
1	1	1
insert into t1 select 22, pk, a from t1;
select
part_id, pk, a,
count(a) over (PARTITION BY part_id
ORDER BY a
RANGE BETWEEN UNBOUNDED PRECEDING
AND 10 FOLLOWING) as cnt
from t1;
part_id	pk	a	cnt
10	1	1	4
10	2	2	4
10	3	4	4
10	4	8	4
10	5	26	6
10	6	27	6
10	7	40	7
10	8	71	9
10	9	72	9
22	1	1	4
22	2	2	4
22	3	4	4
22	4	8	4
22	5	26	6
22	6	27	6
22	7	40	7
22	8	71	9
22	9	72	9
select
pk, a,
count(a) over (PARTITION BY part_id
ORDER BY a
RANGE BETWEEN UNBOUNDED PRECEDING
AND 1 PRECEDING) as cnt
from t1;
pk	a	cnt
1	1	0
2	2	1
3	4	2
4	8	3
5	26	4
6	27	5
7	40	6
8	71	7
9	72	8
1	1	0
2	2	1
3	4	2
4	8	3
5	26	4
6	27	5
7	40	6
8	71	7
9	72	8
drop table t1;
# Try a RANGE frame over non-integer datatype:
create table t1 (
col1 int,
a decimal(5,3)
);
insert into t1 values (1, 0.45);
insert into t1 values (1, 0.5);
insert into t1 values (1, 0.55);
insert into t1 values (1, 1.21);
insert into t1 values (1, 1.22);
insert into t1 values (1, 3.33);
select
a,
count(col1) over (order by a
range between 0.1 preceding
and 0.1 following)
from t1;
a	count(col1) over (order by a
range between 0.1 preceding
and 0.1 following)
0.450	3
0.500	3
0.550	3
1.210	2
1.220	2
3.330	1
drop table t1;
#
# RANGE-type frames and NULL values
#
create table t1 (
pk int,
a int,
b int
);
insert into t1 values (1, NULL,1);
insert into t1 values (2, NULL,1);
insert into t1 values (3, NULL,1);
insert into t1 values (4, 10 ,1);
insert into t1 values (5, 11 ,1);
insert into t1 values (6, 12 ,1);
insert into t1 values (7, 13 ,1);
insert into t1 values (8, 14 ,1);
select
pk, a,
count(b) over (order by a
range between 2 preceding
and 2 following) as CNT
from t1
order by a, pk;
pk	a	CNT
1	NULL	3
2	NULL	3
3	NULL	3
4	10	3
5	11	4
6	12	5
7	13	4
8	14	3
drop table t1;
#
#  Try ranges that have bound1 > bound2.  The standard actually allows them
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (pk int, c int);
insert into t1 select a+1,1 from t0;
update t1 set c=2 where pk not in (1,2,3,4);
select * from t1;
pk	c
1	1
2	1
3	1
4	1
5	2
6	2
7	2
8	2
9	2
10	2
select
pk, c,
count(*) over (partition by c
order by pk
rows between 1 preceding
and 2 preceding)
as cnt
from t1;
pk	c	cnt
1	1	0
2	1	0
3	1	0
4	1	0
5	2	0
6	2	0
7	2	0
8	2	0
9	2	0
10	2	0
select
pk, c,
sum(c) over (partition by c
order by pk
rows between 1 preceding
and 2 preceding)
as sum
from t1;
pk	c	sum
1	1	NULL
2	1	NULL
3	1	NULL
4	1	NULL
5	2	NULL
6	2	NULL
7	2	NULL
8	2	NULL
9	2	NULL
10	2	NULL
select
pk, c,
sum(c) over (partition by c
order by pk
rows between 2 following
and 1 following)
as sum
from t1;
pk	c	sum
1	1	NULL
2	1	NULL
3	1	NULL
4	1	NULL
5	2	NULL
6	2	NULL
7	2	NULL
8	2	NULL
9	2	NULL
10	2	NULL
select
pk, c,
count(*) over (partition by c
order by pk
range between 1 preceding
and 2 preceding)
as cnt
from t1;
pk	c	cnt
1	1	0
2	1	0
3	1	0
4	1	0
5	2	0
6	2	0
7	2	0
8	2	0
9	2	0
10	2	0
drop table t0, t1;
#
# Error checking for frame bounds
#
create table t1 (a int, b int, c varchar(32));
insert into t1 values (1,1,'foo');
insert into t1 values (2,2,'bar');
select
count(*) over (order by a,b
range between unbounded preceding and current row)
from t1;
ERROR HY000: RANGE-type frame requires ORDER BY clause with single sort key
select
count(*) over (order by c
range between unbounded preceding and current row)
from t1;
ERROR HY000: Numeric datatype is required for RANGE-type frame
select
count(*) over (order by a
range between 'abcd' preceding and current row)
from t1;
ERROR HY000: Numeric datatype is required for RANGE-type frame
select
count(*) over (order by a
range between current row and 'foo' following)
from t1;
ERROR HY000: Numeric datatype is required for RANGE-type frame
# Try range frame with invalid bounds
select
count(*) over (order by a
rows between 0.5 preceding and current row)
from t1;
ERROR HY000: Integer is required for ROWS-type frame
select
count(*) over (order by a
rows between current row and 3.14 following)
from t1;
ERROR HY000: Integer is required for ROWS-type frame
#
# EXCLUDE clause is parsed but not supported
#
select
count(*) over (order by a
rows between 1 preceding and 1 following
exclude current row)
from t1;
ERROR HY000: Frame exclusion is not supported yet
select
count(*) over (order by a
range between 1 preceding and 1 following
exclude ties)
from t1;
ERROR HY000: Frame exclusion is not supported yet
select
count(*) over (order by a
range between 1 preceding and 1 following
exclude group)
from t1;
ERROR HY000: Frame exclusion is not supported yet
select
count(*) over (order by a
rows between 1 preceding and 1 following
exclude no others)
from t1;
count(*) over (order by a
rows between 1 preceding and 1 following
exclude no others)
2
2
drop table t1;
#
#  Window function in grouping query
#
create table t1 (
username  varchar(32),
amount int
);
insert into t1 values
('user1',1),
('user1',5),
('user1',3),
('user2',10),
('user2',20),
('user2',30);
select
username,
sum(amount) as s,
rank() over (order by s desc)
from t1
group by username;
username	s	rank() over (order by s desc)
user1	9	2
user2	60	1
drop table t1;
#
#  mdev-9719: Window function in prepared statement
#
create table t1(a int, b int, x char(32));
insert into t1 values (2, 10, 'xx');
insert into t1 values (2, 10, 'zz');
insert into t1 values (2, 20, 'yy');
insert into t1 values (3, 10, 'xxx');
insert into t1 values (3, 20, 'vvv');
prepare stmt from 'select a, row_number() over (partition by a order by b) from t1';
execute stmt;
a	row_number() over (partition by a order by b)
2	1
2	2
2	3
3	1
3	2
drop table t1;
#
#  mdev-9754: Window name resolution in prepared statement
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (pk int, c int);
insert into t1 select a+1,1 from t0;
update t1 set c=2 where pk not in (1,2,3,4);
select * from t1;
pk	c
1	1
2	1
3	1
4	1
5	2
6	2
7	2
8	2
9	2
10	2
prepare stmt from
'select
  pk, c,
  count(*) over w1 as CNT
from t1
window w1 as (partition by c order by pk
              rows between 2 preceding and 2 following)';
execute stmt;
pk	c	CNT
1	1	3
2	1	4
3	1	4
4	1	3
5	2	3
6	2	4
7	2	5
8	2	5
9	2	4
10	2	3
drop table t0,t1;
#
# EXPLAIN FORMAT=JSON support for window functions
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
explain format=json select rank() over (order by a) from t0;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "window_functions_computation": {
      "sorts": {
        "filesort": {
          "sort_key": "t0.a"
        }
      },
      "temporary_table": {
        "table": {
          "table_name": "t0",
          "access_type": "ALL",
          "rows": 10,
          "filtered": 100
        }
      }
    }
  }
}
create table t1 (a int, b int, c int);
insert into t1 select a,a,a from t0;
explain format=json
select
a,
rank() over (order by sum(b))
from t1
group by a;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "filesort": {
      "sort_key": "t1.a",
      "window_functions_computation": {
        "sorts": {
          "filesort": {
            "sort_key": "sum(t1.b)"
          }
        },
        "temporary_table": {
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 10,
            "filtered": 100
          }
        }
      }
    }
  }
}
explain format=json
select
a,
rank() over (order by sum(b))
from t1
group by a
order by null;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "window_functions_computation": {
      "sorts": {
        "filesort": {
          "sort_key": "sum(t1.b)"
        }
      },
      "temporary_table": {
        "table": {
          "table_name": "t1",
          "access_type": "ALL",
          "rows": 10,
          "filtered": 100
        }
      }
    }
  }
}
#
# Check how window function works together with GROUP BY and HAVING
#
select b,max(a) as MX, rank() over (order by b) from t1 group by b having MX in (3,5,7);
b	MX	rank() over (order by b)
3	3	1
5	5	2
7	7	3
explain format=json
select b,max(a) as MX, rank() over (order by b) from t1 group by b having MX in (3,5,7);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "having_condition": "MX in (3,5,7)",
    "filesort": {
      "sort_key": "t1.b",
      "window_functions_computation": {
        "sorts": {
          "filesort": {
            "sort_key": "t1.b"
          }
        },
        "temporary_table": {
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 10,
            "filtered": 100
          }
        }
      }
    }
  }
}
drop table t1;
drop table t0;
#
# Building ordering index for window functions
#
create table t1 (
pk int primary key,
a int,
b int,
c  int
);
insert into t1 values
(101 , 0, 10, 1),
(102 , 0, 10, 2),
(103 , 1, 10, 3),
(104 , 1, 10, 4),
(108 , 2, 10, 5),
(105 , 2, 20, 6),
(106 , 2, 20, 7),
(107 , 2, 20, 8),
(109 , 4, 20, 9),
(110 , 4, 20, 10),
(111 , 5, NULL, 11),
(112 , 5, 1, 12),
(113 , 5, NULL, 13),
(114 , 5, NULL, 14),
(115 , 5, NULL, 15),
(116 , 6, 1, NULL),
(117 , 6, 1, 10),
(118 , 6, 1, 1),
(119 , 6, 1, NULL),
(120 , 6, 1, NULL),
(121 , 6, 1, NULL),
(122 , 6, 1, 2),
(123 , 6, 1, 20),
(124 , 6, 1, -10),
(125 , 6, 1, NULL),
(126 , 6, 1, NULL),
(127 , 6, 1, NULL);
select sum(b) over (partition by a order by b,pk
rows between unbounded preceding  and current row) as c1,
avg(b) over (w1 rows between 1 preceding and 1 following) as c2,
sum(c) over (w2 rows between 1 preceding and 1 following) as c5,
avg(b) over (w1 rows between 5 preceding and 5 following) as c3,
sum(b) over (w1 rows between 1 preceding and 1 following) as c4
from t1
window w1 as (partition by a order by b,pk),
w2 as (partition by b order by c,pk);
c1	c2	c5	c3	c4
1	1.0000	42	1.0000	1
1	1.0000	NULL	1.0000	2
10	1.0000	NULL	1.0000	3
10	10.0000	3	10.0000	20
10	10.0000	9	10.0000	20
10	15.0000	9	17.5000	30
11	1.0000	NULL	1.0000	3
12	1.0000	-10	1.0000	2
2	1.0000	24	1.0000	3
20	10.0000	12	10.0000	20
20	10.0000	6	10.0000	20
20	20.0000	27	20.0000	40
3	1.0000	-7	1.0000	3
30	16.6667	13	17.5000	50
4	1.0000	NULL	1.0000	3
40	20.0000	19	20.0000	40
5	1.0000	NULL	1.0000	3
50	20.0000	21	17.5000	60
6	1.0000	NULL	1.0000	3
7	1.0000	13	1.0000	3
70	20.0000	24	17.5000	40
8	1.0000	32	1.0000	3
9	1.0000	-9	1.0000	3
NULL	1.0000	29	1.0000	1
NULL	NULL	24	1.0000	NULL
NULL	NULL	38	1.0000	NULL
NULL	NULL	42	1.0000	NULL
drop table t1;
#
# MDEV-9848: Window functions: reuse sorting and/or scanning
#
create table t1 (a int, b int, c int);
insert into t1 values
(1,3,1),
(2,2,1),
(3,1,1);
#  Check using counters
flush status;
select
rank() over (partition by c order by a),
rank() over (partition by c order by b)
from t1;
rank() over (partition by c order by a)	rank() over (partition by c order by b)
1	3
2	2
3	1
show status like '%sort%';
Variable_name	Value
Sort_merge_passes	0
Sort_priority_queue_sorts	0
Sort_range	0
Sort_rows	6
Sort_scan	2
flush status;
select
rank() over (partition by c order by a),
rank() over (partition by c order by a)
from t1;
rank() over (partition by c order by a)	rank() over (partition by c order by a)
1	1
2	2
3	3
show status like '%sort%';
Variable_name	Value
Sort_merge_passes	0
Sort_priority_queue_sorts	0
Sort_range	0
Sort_rows	3
Sort_scan	1
explain format=json
select
rank() over (partition by c order by a),
rank() over (partition by c order by a)
from t1;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "window_functions_computation": {
      "sorts": {
        "filesort": {
          "sort_key": "t1.c, t1.a"
        }
      },
      "temporary_table": {
        "table": {
          "table_name": "t1",
          "access_type": "ALL",
          "rows": 3,
          "filtered": 100
        }
      }
    }
  }
}
explain format=json
select
rank() over (order by a),
row_number() over (order by a)
from t1;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "window_functions_computation": {
      "sorts": {
        "filesort": {
          "sort_key": "t1.a"
        }
      },
      "temporary_table": {
        "table": {
          "table_name": "t1",
          "access_type": "ALL",
          "rows": 3,
          "filtered": 100
        }
      }
    }
  }
}
explain format=json
select
rank() over (partition by c order by a),
count(*) over (partition by c)
from t1;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "window_functions_computation": {
      "sorts": {
        "filesort": {
          "sort_key": "t1.c, t1.a"
        }
      },
      "temporary_table": {
        "table": {
          "table_name": "t1",
          "access_type": "ALL",
          "rows": 3,
          "filtered": 100
        }
      }
    }
  }
}
explain format=json
select
count(*) over (partition by c),
rank() over (partition by c order by a)
from t1;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "window_functions_computation": {
      "sorts": {
        "filesort": {
          "sort_key": "t1.c, t1.a"
        }
      },
      "temporary_table": {
        "table": {
          "table_name": "t1",
          "access_type": "ALL",
          "rows": 3,
          "filtered": 100
        }
      }
    }
  }
}
drop table t1;
#
# MDEV-9847: Window functions: crash with big_tables=1
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
set tmp_memory_table_size=0;
select rank() over (order by a) from t1;
rank() over (order by a)
1
2
3
4
5
6
7
8
9
10
set tmp_memory_table_size=default;
drop table t1;
#
# Check if "ORDER BY window_func" works
#
create table t1 (s1 int, s2 char(5));
insert into t1 values (1,'a');
insert into t1 values (null,null);
insert into t1 values (1,null);
insert into t1 values (null,'a');
insert into t1 values (2,'b');
insert into t1 values (-1,'');
explain format=json
select *, row_number() over (order by s1, s2) as X from t1 order by X desc;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "filesort": {
      "sort_key": "row_number() over ( order by t1.s1,t1.s2) desc",
      "window_functions_computation": {
        "sorts": {
          "filesort": {
            "sort_key": "t1.s1, t1.s2"
          }
        },
        "temporary_table": {
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 6,
            "filtered": 100
          }
        }
      }
    }
  }
}
select *, row_number() over (order by s1, s2) as X from t1 order by X desc;
s1	s2	X
2	b	6
1	a	5
1	NULL	4
-1		3
NULL	a	2
NULL	NULL	1
drop table t1;
#
# Try window functions that are not directly present in the select list
#
create table t1 (a int, b int);
insert into t1 values
(1,3),
(2,2),
(3,1);
select
a, b,
rank() over (order by a), rank() over (order by b),
rank() over (order by a) - rank() over (order by b) as diff
from
t1;
a	b	rank() over (order by a)	rank() over (order by b)	diff
1	3	1	3	-2
2	2	2	2	0
3	1	3	1	2
drop table t1;
create table t1 (i int);
insert into t1 values (1),(2);
SELECT MAX(i) OVER (PARTITION BY (i)) FROM t1;
MAX(i) OVER (PARTITION BY (i))
1
2
drop table t1;
#
# Check the 0 in ROWS 0 PRECEDING
#
create table t1 (
part_id int,
pk int,
a int
);
insert into t1 values (1, 1, 1);
insert into t1 values (1, 2, 2);
insert into t1 values (1, 3, 4);
insert into t1 values (1, 4, 8);
select
pk, a,
sum(a) over (order by pk rows between 0 preceding and current row)
from t1;
pk	a	sum(a) over (order by pk rows between 0 preceding and current row)
1	1	1
2	2	2
3	4	4
4	8	8
select
pk, a,
sum(a) over (order by pk rows between 1 preceding and 0 preceding)
from t1;
pk	a	sum(a) over (order by pk rows between 1 preceding and 0 preceding)
1	1	1
2	2	3
3	4	6
4	8	12
insert into t1 values (200, 1, 1);
insert into t1 values (200, 2, 2);
insert into t1 values (200, 3, 4);
insert into t1 values (200, 4, 8);
select
part_id, pk, a,
sum(a) over (partition by part_id order by pk rows between 0 preceding and current row)
from t1;
part_id	pk	a	sum(a) over (partition by part_id order by pk rows between 0 preceding and current row)
1	1	1	1
1	2	2	2
1	3	4	4
1	4	8	8
200	1	1	1
200	2	2	2
200	3	4	4
200	4	8	8
select
part_id, pk, a,
sum(a) over (partition by part_id order by pk rows between 1 preceding and 0 preceding)
from t1;
part_id	pk	a	sum(a) over (partition by part_id order by pk rows between 1 preceding and 0 preceding)
1	1	1	1
1	2	2	3
1	3	4	6
1	4	8	12
200	1	1	1
200	2	2	3
200	3	4	6
200	4	8	12
drop table t1;
#
# MDEV-9780, The "DISTINCT must not bet converted into GROUP BY when
#                 window functions are present" part
#
create table t1 (part_id int, a int);
insert into t1 values
(100, 1),
(100, 2),
(100, 2),
(100, 3),
(2000, 1),
(2000, 2),
(2000, 3),
(2000, 3),
(2000, 3);
select          rank() over (partition by part_id order by a) from t1;
rank() over (partition by part_id order by a)
1
2
2
4
1
2
3
3
3
select distinct rank() over (partition by part_id order by a) from t1;
rank() over (partition by part_id order by a)
1
2
4
3
explain format=json
select distinct rank() over (partition by part_id order by a) from t1;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "duplicate_removal": {
      "window_functions_computation": {
        "sorts": {
          "filesort": {
            "sort_key": "t1.part_id, t1.a"
          }
        },
        "temporary_table": {
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 9,
            "filtered": 100
          }
        }
      }
    }
  }
}
drop table t1;
#
# MDEV-9893: Window functions with different ORDER BY lists,
#            one of these lists containing an expression
#
create table t1 (s1 int, s2 char(5));
insert into t1 values (1,'a');
insert into t1 values (null,null);
insert into t1 values (3,null);
insert into t1 values (4,'a');
insert into t1 values (2,'b');
insert into t1 values (-1,'');
select
*,
ROW_NUMBER() OVER (order by s1),
CUME_DIST() OVER (order by -s1)
from t1;
s1	s2	ROW_NUMBER() OVER (order by s1)	CUME_DIST() OVER (order by -s1)
-1		2	1.0000000000
1	a	3	0.8333333333
2	b	4	0.6666666667
3	NULL	5	0.5000000000
4	a	6	0.3333333333
NULL	NULL	1	0.1666666667
drop table t1;
#
# MDEV-9925: Wrong result with aggregate function as a window function
#
create table t1 (i int);
insert into t1 values (1),(2);
select i, sum(i) over (partition by i) from t1;
i	sum(i) over (partition by i)
1	1
2	2
drop table t1;
#
# MDEV-9922: Assertion `!join->only_const_tables() && fsort' failed in int create_sort_index
#
create view v1 as select 1 as i;
select rank() over (order by i) from v1;
rank() over (order by i)
1
drop view v1;
#
# MDEV-10097: Assertion `count > 0' failed in Item_sum_sum::add_helper(bool)
#
CREATE TABLE `orders` (
`o_orderkey` int(11) NOT NULL,
`o_custkey` int(11) DEFAULT NULL,
PRIMARY KEY (`o_orderkey`)
) DEFAULT CHARSET=latin1;
INSERT INTO `orders` VALUES (59908,242);
INSERT INTO `orders` VALUES (59940,238);
SELECT o_custkey, avg(o_custkey) OVER (PARTITION BY abs(o_custkey)
ORDER BY o_custkey
RANGE BETWEEN 15 FOLLOWING
AND 15 FOLLOWING) from orders;
o_custkey	avg(o_custkey) OVER (PARTITION BY abs(o_custkey)
ORDER BY o_custkey
RANGE BETWEEN 15 FOLLOWING
AND 15 FOLLOWING)
238	NULL
242	NULL
DROP table orders;
#
# MDEV-10842: window functions with the same order column
#             but different directions
#
create table t1 (
pk int primary key,
a int,
b int,
c char(10)
);
insert into t1 values
( 1, 0, 1, 'one'),
( 2, 0, 2, 'two'),
( 3, 0, 3, 'three'),
( 4, 1, 1, 'one'),
( 5, 1, 1, 'two'),
( 6, 1, 2, 'three'),
( 7, 2, NULL, 'n_one'),
( 8, 2, 1,    'n_two'),
( 9, 2, 2,    'n_three'),
(10, 2, 0,    'n_four'),
(11, 2, 10,   NULL);
select pk,
row_number() over (order by pk desc) as r_desc,
row_number() over (order by pk asc) as r_asc
from t1;
pk	r_desc	r_asc
11	1	11
10	2	10
9	3	9
8	4	8
7	5	7
6	6	6
5	7	5
4	8	4
3	9	3
2	10	2
1	11	1
drop table t1;
#
# MDEV-10874: two window functions with compatible sorting
#
create table t1 (
pk int primary key,
a int,
b int,
c char(10),
d decimal(10, 3),
e real
);
insert into t1 values
( 1, 0, 1,    'one',    0.1,  0.001),
( 2, 0, 2,    'two',    0.2,  0.002),
( 3, 0, 3,    'three',  0.3,  0.003),
( 4, 1, 2,    'three',  0.4,  0.004),
( 5, 1, 1,    'two',    0.5,  0.005),
( 6, 1, 1,    'one',    0.6,  0.006),
( 7, 2, NULL, 'n_one',  0.5,  0.007),
( 8, 2, 1,    'n_two',  NULL, 0.008),
( 9, 2, 2,    NULL,     0.7,  0.009),
(10, 2, 0,    'n_four', 0.8,  0.010),
(11, 2, 10,   NULL,     0.9,  NULL);
select pk, a, d,
sum(d) over (partition by a order by pk
ROWS between 1 preceding and current row) as sum_1, 
sum(d) over (order by a 
ROWS BETWEEN 1 preceding and 2 following) as sum_2
from t1;
pk	a	d	sum_1	sum_2
1	0	0.100	0.100	0.600
2	0	0.200	0.300	1.000
3	0	0.300	0.500	1.400
4	1	0.400	0.400	1.800
5	1	0.500	0.900	2.000
6	1	0.600	1.100	1.600
7	2	0.500	0.500	1.800
8	2	NULL	0.500	2.000
9	2	0.700	0.700	2.400
10	2	0.800	1.500	2.400
11	2	0.900	1.700	1.700
explain format=json
select pk, a, d,
sum(d) over (partition by a order by pk
ROWS between 1 preceding and current row) as sum_1, 
sum(d) over (order by a 
ROWS BETWEEN 1 preceding and 2 following) as sum_2
from t1;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "window_functions_computation": {
      "sorts": {
        "filesort": {
          "sort_key": "t1.a, t1.pk"
        }
      },
      "temporary_table": {
        "table": {
          "table_name": "t1",
          "access_type": "ALL",
          "rows": 11,
          "filtered": 100
        }
      }
    }
  }
}
select pk, a, d,
sum(d) over (partition by a order by pk desc
ROWS between 1 preceding and current row) as sum_1, 
sum(d) over (order by a 
ROWS BETWEEN 1 preceding and 2 following) as sum_2
from t1;
pk	a	d	sum_1	sum_2
3	0	0.300	0.300	0.600
2	0	0.200	0.500	1.200
1	0	0.100	0.300	1.400
6	1	0.600	0.600	1.600
5	1	0.500	1.100	2.400
4	1	0.400	0.900	2.600
11	2	0.900	0.900	2.800
10	2	0.800	1.700	2.400
9	2	0.700	1.500	2.000
8	2	NULL	0.700	1.200
7	2	0.500	0.500	0.500
drop table t1;
#
# MDEV-9941: two window functions with compatible partitions 
#
create table t1 (
a int,
b int,
c int
);
insert into t1 values 
(10, 1, 1),
(10, 3, 10),
(10, 1, 10),
(10, 3, 100),
(10, 5, 1000),
(10, 1, 100);
explain format=json
select 
a,b,c,
row_number() over (partition by a),
row_number() over (partition by a, b)
from t1;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "window_functions_computation": {
      "sorts": {
        "filesort": {
          "sort_key": "t1.a, t1.b"
        }
      },
      "temporary_table": {
        "table": {
          "table_name": "t1",
          "access_type": "ALL",
          "rows": 6,
          "filtered": 100
        }
      }
    }
  }
}
drop table t1;
#
# MDEV-10815: Window Function Expressions Wrong Results
#
create table t(a decimal(35,10), b int);
insert into t(a,b) values(1,1);
insert into t(a,b) values(2,1);
insert into t(a,b) values(0,1);
insert into t(a,b) values(1,  2);
insert into t(a,b) values(1.5,2);
insert into t(a,b) values(3,  2);
insert into t(a,b) values(4.5,2);
select a, b,
sum(t.a) over (partition by t.b order by a) as simple_sum,
sum(t.a) over (partition by t.b order by a) + 1 as sum_and_const,
sum(t.b) over (partition by t.b order by a) + sum(t.a) over (partition by t.b order by a) as sum_and_sum
from t
order by t.b, t.a;
a	b	simple_sum	sum_and_const	sum_and_sum
0.0000000000	1	0.0000000000	1.0000000000	1.0000000000
1.0000000000	1	1.0000000000	2.0000000000	3.0000000000
2.0000000000	1	3.0000000000	4.0000000000	6.0000000000
1.0000000000	2	1.0000000000	2.0000000000	3.0000000000
1.5000000000	2	2.5000000000	3.5000000000	6.5000000000
3.0000000000	2	5.5000000000	6.5000000000	11.5000000000
4.5000000000	2	10.0000000000	11.0000000000	18.0000000000
drop table t;
#
# MDEV-10669: Crash in SELECT with window function used
#
create table t(a decimal(35,10), b int);
insert into t(a,b) values(1,1);
insert into t(a,b) values(2,1);
insert into t(a,b) values(0,1);
SELECT (CASE WHEN sum(t.a) over (partition by t.b)=0 THEN null ELSE null END) AS a FROM t;
a
NULL
NULL
NULL
SELECT ifnull(((t.a) / CASE WHEN sum(t.a) over(partition by t.b) =0 then null else null end) ,0) from t;
ifnull(((t.a) / CASE WHEN sum(t.a) over(partition by t.b) =0 then null else null end) ,0)
0.00000000000000
0.00000000000000
0.00000000000000
SELECT sum(t.a) over (partition by t.b order by a),
sqrt(ifnull((sum(t.a) over (partition by t.b order by a)), 0))
from t;
sum(t.a) over (partition by t.b order by a)	sqrt(ifnull((sum(t.a) over (partition by t.b order by a)), 0))
0.0000000000	0
1.0000000000	1
3.0000000000	1.7320508075688772
drop table t;
#
# MDEV-10868: view definitions with window functions
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (pk int, c int);
insert into t1 select a+1,1 from t0;
update t1 set c=2 where pk not in (1,2,3,4);
select * from t1;
pk	c
1	1
2	1
3	1
4	1
5	2
6	2
7	2
8	2
9	2
10	2
select pk, c, c/count(*) over (partition by c order by pk
rows between 1 preceding and 2 following) as CNT
from t1;
pk	c	CNT
1	1	0.3333
2	1	0.2500
3	1	0.3333
4	1	0.5000
5	2	0.6667
6	2	0.5000
7	2	0.5000
8	2	0.5000
9	2	0.6667
10	2	1.0000
create view v1 as select pk, c, c/count(*) over (partition by c order by pk
rows between 1 preceding and 2 following) as CNT
from t1;
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`pk` AS `pk`,`t1`.`c` AS `c`,`t1`.`c` / count(0) over ( partition by `t1`.`c` order by `t1`.`pk` rows between 1 preceding  and 2 following ) AS `CNT` from `t1`	latin1	latin1_swedish_ci
select * from v1;
pk	c	CNT
1	1	0.3333
2	1	0.2500
3	1	0.3333
4	1	0.5000
5	2	0.6667
6	2	0.5000
7	2	0.5000
8	2	0.5000
9	2	0.6667
10	2	1.0000
select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows between 1 preceding and 2 following);
pk	c	CNT
1	1	0.3333
2	1	0.2500
3	1	0.3333
4	1	0.5000
5	2	0.6667
6	2	0.5000
7	2	0.5000
8	2	0.5000
9	2	0.6667
10	2	1.0000
create view v2 as select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows between 1 preceding and 2 following);
show create view v2;
View	Create View	character_set_client	collation_connection
v2	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v2` AS select `t1`.`pk` AS `pk`,`t1`.`c` AS `c`,`t1`.`c` / count(0) over ( partition by `t1`.`c` order by `t1`.`pk` rows between 1 preceding  and 2 following ) AS `CNT` from `t1`	latin1	latin1_swedish_ci
select * from v2;
pk	c	CNT
1	1	0.3333
2	1	0.2500
3	1	0.3333
4	1	0.5000
5	2	0.6667
6	2	0.5000
7	2	0.5000
8	2	0.5000
9	2	0.6667
10	2	1.0000
select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows unbounded preceding);
pk	c	CNT
1	1	1.0000
2	1	0.5000
3	1	0.3333
4	1	0.2500
5	2	2.0000
6	2	1.0000
7	2	0.6667
8	2	0.5000
9	2	0.4000
10	2	0.3333
create view v3 as select pk, c, c/count(*) over w1 as CNT from t1
window w1 as (partition by c order by pk rows unbounded preceding);
show create view v3;
View	Create View	character_set_client	collation_connection
v3	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v3` AS select `t1`.`pk` AS `pk`,`t1`.`c` AS `c`,`t1`.`c` / count(0) over ( partition by `t1`.`c` order by `t1`.`pk` rows between  unbounded  preceding  and  current row ) AS `CNT` from `t1`	latin1	latin1_swedish_ci
select * from v3;
pk	c	CNT
1	1	1.0000
2	1	0.5000
3	1	0.3333
4	1	0.2500
5	2	2.0000
6	2	1.0000
7	2	0.6667
8	2	0.5000
9	2	0.4000
10	2	0.3333
select pk, c, c/count(*) over (partition by c order by pk
range between 3 preceding and current row) as CNT
from t1;
pk	c	CNT
1	1	1.0000
2	1	0.5000
3	1	0.3333
4	1	0.2500
5	2	2.0000
6	2	1.0000
7	2	0.6667
8	2	0.5000
9	2	0.5000
10	2	0.5000
create view v4 as select pk, c, c/count(*) over (partition by c order by pk
range between 3 preceding and current row) as CNT
from t1;
show create view v4;
View	Create View	character_set_client	collation_connection
v4	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v4` AS select `t1`.`pk` AS `pk`,`t1`.`c` AS `c`,`t1`.`c` / count(0) over ( partition by `t1`.`c` order by `t1`.`pk` range between 3 preceding  and  current row ) AS `CNT` from `t1`	latin1	latin1_swedish_ci
select * from v4;
pk	c	CNT
1	1	1.0000
2	1	0.5000
3	1	0.3333
4	1	0.2500
5	2	2.0000
6	2	1.0000
7	2	0.6667
8	2	0.5000
9	2	0.5000
10	2	0.5000
drop view v1,v2,v3,v4;
drop table t0,t1;
#
# MDEV-10875: window function in subquery
#
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (3),(1);
CREATE TABLE t2 (c VARCHAR(8));
INSERT INTO t2 VALUES ('foo'),('bar'),('foo');
SELECT COUNT(*) OVER (PARTITION BY c) FROM t2;
COUNT(*) OVER (PARTITION BY c)
1
2
2
SELECT * FROM t1 WHERE i IN ( SELECT COUNT(*) OVER (PARTITION BY c) FROM t2 );
i
1
DROP TABLE t1, t2;
#
# MDEV-9976: window function without PARTITION BY and ORDER BY
#
CREATE TABLE t1  (id int, a int);
INSERT INTO t1 VALUES
(1,1000), (2,1100), (3,1800), (4,1500), (5,1700), (6,1200),
(7,2000), (8,2100), (9,1600);
SELECT id, sum(a) OVER (PARTITION BY id 
ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
FROM t1;
id	sum(a) OVER (PARTITION BY id 
1	1000
2	1100
3	1800
4	1500
5	1700
6	1200
7	2000
8	2100
9	1600
ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
SELECT id, sum(a) OVER (ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
FROM t1;
id	sum(a) OVER (ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
1	14000
2	13000
3	5900
4	10700
5	7600
6	11900
7	4100
8	2100
9	9200
DROP TABLE t1;
#
# MDEV-11867: window function with aggregation
#             over the result of grouping
#
create table t1 (
username  varchar(32),
amount int
);
insert into t1 values
('user1',1),
('user1',5),
('user1',3),
('user2',10),
('user2',20),
('user2',30);
select username, sum(amount) as s, avg(sum(amount)) over (order by s desc)
from t1
group by username;
username	s	avg(sum(amount)) over (order by s desc)
user1	9	34.5000
user2	60	60.0000
select username, sum(amount), avg(sum(amount)) over (order by sum(amount) desc)
from t1
group by username;
username	sum(amount)	avg(sum(amount)) over (order by sum(amount) desc)
user1	9	34.5000
user2	60	60.0000
drop table t1;
#
# MDEV-11594: window function over implicit grouping
#
create table t1 (id int);
insert into t1 values (1), (2), (3), (2);
select sum(id) over (order by sum(id)) from t1;
sum(id) over (order by sum(id))
1
select sum(sum(id)) over (order by sum(id)) from t1;
sum(sum(id)) over (order by sum(id))
8
drop table t1;
#
# MDEV-9923: integer constant in order by list 
#            of window specification
#
create table t1 (id int);
insert into t1 values (1), (2), (3), (2);
select rank() over (order by 1) from t1;
rank() over (order by 1)
1
1
1
1
select rank() over (order by 2) from t1;
rank() over (order by 2)
1
1
1
1
select rank() over (partition by id order by 2) from t1;
rank() over (partition by id order by 2)
1
1
1
1
drop table t1;
#
# MDEV-10660: view using a simple window function 
#
create table t1 (id int);
insert into t1 values (1), (2), (3), (2);
create view v1(id,rnk) as
select id, rank() over (order by id) from t1;
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`id` AS `id`,rank() over ( order by `t1`.`id`) AS `rnk` from `t1`	latin1	latin1_swedish_ci
select id, rank() over (order by id) from t1;
id	rank() over (order by id)
1	1
2	2
2	2
3	4
select * from v1;
id	rnk
1	1
2	2
2	2
3	4
drop view v1;
drop table t1;
#
# MDEV-11138: window function in the query without tables 
#
select row_number() over ();
row_number() over ()
1
select count(*) over ();
count(*) over ()
1
select sum(5) over ();
sum(5) over ()
5
select row_number() over (), sum(5) over ();
row_number() over ()	sum(5) over ()
1	5
select row_number() over (order by 2);
row_number() over (order by 2)
1
select row_number() over (partition by 2);
row_number() over (partition by 2)
1
select row_number() over (partition by 4 order by 1+2);
row_number() over (partition by 4 order by 1+2)
1
#
# MDEV-11999: execution of prepared statement for  
#             tableless query with window functions
#
prepare stmt from
"select row_number() over (partition by 4 order by 1+2)";
execute stmt;
row_number() over (partition by 4 order by 1+2)
1
execute stmt;
row_number() over (partition by 4 order by 1+2)
1
deallocate prepare stmt;
#
# MDEV-11745: window function with min/max 
#
create table t1 (i int, b int);
insert into t1 values
(1,1),(2,1),(3,1),(4,4),(5,4),(6,4),(7,8),(8,8),(9,8),(10,8);
select b, min(i) over (partition by b) as f 
from t1 as tt
order by i;
b	f
1	1
1	1
1	1
4	4
4	4
4	4
8	7
8	7
8	7
8	7
select b, min(i) over (partition by b) as f 
from (select * from t1) as tt
order by i;
b	f
1	1
1	1
1	1
4	4
4	4
4	4
8	7
8	7
8	7
8	7
select b, min(i+10) over (partition by b) as f 
from t1 as tt
order by i;
b	f
1	11
1	11
1	11
4	14
4	14
4	14
8	17
8	17
8	17
8	17
select b, min(i) over (partition by b) as f 
from (select i+10 as i, b from t1) as tt
order by i;
b	f
1	11
1	11
1	11
4	14
4	14
4	14
8	17
8	17
8	17
8	17
select b, min(i+20) over (partition by b) as f 
from (select i+10 as i, b from t1) as tt
order by i;
b	f
1	31
1	31
1	31
4	34
4	34
4	34
8	37
8	37
8	37
8	37
select b, max(i) over (partition by b) as f 
from t1 as tt
order by i;
b	f
1	3
1	3
1	3
4	6
4	6
4	6
8	10
8	10
8	10
8	10
select b, max(i) over (partition by b) as f 
from (select * from t1) as tt
order by i;
b	f
1	3
1	3
1	3
4	6
4	6
4	6
8	10
8	10
8	10
8	10
select b, max(i+10) over (partition by b) as f 
from t1 as tt
order by i;
b	f
1	13
1	13
1	13
4	16
4	16
4	16
8	20
8	20
8	20
8	20
select b, max(i) over (partition by b) as f 
from (select i+10 as i, b from t1) as tt
order by i;
b	f
1	13
1	13
1	13
4	16
4	16
4	16
8	20
8	20
8	20
8	20
select b, max(i+20) over (partition by b) as f 
from (select i+10 as i, b from t1) as tt
order by i;
b	f
1	33
1	33
1	33
4	36
4	36
4	36
8	40
8	40
8	40
8	40
select max(i), max(i), sum(i), count(i)
from t1 as tt
group by b;
max(i)	max(i)	sum(i)	count(i)
3	3	6	3
6	6	15	3
10	10	34	4
select max(i), min(sum(i)) over (partition by count(i)) f
from t1 as tt
group by b;
max(i)	f
3	6
6	6
10	34
select max(i), min(sum(i)) over (partition by count(i)) f
from (select * from t1) as tt
group by b;
max(i)	f
3	6
6	6
10	34
select max(i+10), min(sum(i)+10) over (partition by count(i)) f
from t1 as tt
group by b;
max(i+10)	f
13	16
16	16
20	44
select max(i), max(i), sum(i), count(i)
from (select i+10 as i, b from t1) as tt
group by b;
max(i)	max(i)	sum(i)	count(i)
13	13	36	3
16	16	45	3
20	20	74	4
select max(i), min(sum(i)) over (partition by count(i)) f
from (select i+10 as i, b from t1) as tt
group by b;
max(i)	f
13	36
16	36
20	74
select max(i), min(i), min(max(i)-min(i)) over (partition by count(i)) f
from (select i+10 as i, b from t1) as tt
group by b;
max(i)	min(i)	f
13	11	2
16	14	2
20	17	3
drop table t1;
#
# MDEV-12015: window function over select with WHERE  
#             that is always FALSE
#
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (3), (1), (2);
SELECT i, ROW_NUMBER() OVER () FROM t1 WHERE 1 = 2;
i	ROW_NUMBER() OVER ()
SELECT i, COUNT(*) OVER () FROM t1 WHERE 1 = 2;
i	COUNT(*) OVER ()
DROP TABLE t1;
#
# MDEV-12051: window function in query with implicit grouping 
#             on always empty set
#
create table t1 (a int, b varchar(8));
insert into t1 values (1,'foo'),(2,'bar');
select max(a), row_number() over () from t1 where a > 10;
max(a)	row_number() over ()
NULL	1
select max(a), sum(max(a)) over () from t1 where a > 10;
max(a)	sum(max(a)) over ()
NULL	NULL
select max(a), sum(max(a)) over (partition by max(a)) from t1 where a > 10;
max(a)	sum(max(a)) over (partition by max(a))
NULL	NULL
select max(a), row_number() over () from t1 where 1 = 2;
max(a)	row_number() over ()
NULL	1
select max(a), sum(max(a)) over () from t1 where 1 = 2;
max(a)	sum(max(a)) over ()
NULL	NULL
select max(a), sum(max(a)) over (partition by max(a)) from t1 where 1 = 2;
max(a)	sum(max(a)) over (partition by max(a))
NULL	NULL
select max(a), row_number() over () from t1 where 1 = 2
having max(a) is not null;
max(a)	row_number() over ()
select max(a), sum(max(a)) over () from t1 where 1 = 2
having max(a) is not null;
max(a)	sum(max(a)) over ()
drop table t1;
#
# MDEV-10885: window function in query with implicit grouping 
#             with constant condition evaluated to false
#
CREATE TABLE t1 (a INT, b VARCHAR(8));
INSERT INTO t1 VALUES (1,'foo'),(2,'bar');
CREATE TABLE t2 (c INT);
INSERT INTO t2 VALUES (3),(4);
CREATE TABLE t3 (d INT);
INSERT INTO t3 VALUES (5),(6);
SELECT MAX(a), ROW_NUMBER() OVER (PARTITION BY MAX(a)) FROM t1
WHERE EXISTS ( SELECT * FROM t2 WHERE c IN ( SELECT MAX(d) FROM t3 ) );
MAX(a)	ROW_NUMBER() OVER (PARTITION BY MAX(a))
NULL	1
SELECT MAX(a), COUNT(MAX(a)) OVER (PARTITION BY MAX(a)) FROM t1
WHERE EXISTS ( SELECT * FROM t2 WHERE c IN ( SELECT MAX(d) FROM t3 ) );
MAX(a)	COUNT(MAX(a)) OVER (PARTITION BY MAX(a))
NULL	0
SELECT MAX(a), SUM(MAX(a)) OVER (PARTITION BY MAX(a)) FROM t1
WHERE EXISTS ( SELECT * FROM t2 WHERE c IN ( SELECT MAX(d) FROM t3 ) );
MAX(a)	SUM(MAX(a)) OVER (PARTITION BY MAX(a))
NULL	NULL
SELECT MAX(a), ROW_NUMBER() OVER (PARTITION BY MAX(a)) FROM t1
WHERE EXISTS ( SELECT * FROM t2 WHERE c IN ( SELECT MAX(d) FROM t3 ) )
HAVING MAX(a) IS NOT NULL;
MAX(a)	ROW_NUMBER() OVER (PARTITION BY MAX(a))
SELECT a, MAX(a), ROW_NUMBER() OVER (PARTITION BY b) FROM t1
WHERE EXISTS ( SELECT * FROM t2 WHERE c IN ( SELECT MAX(d) FROM t3 ) );
a	MAX(a)	ROW_NUMBER() OVER (PARTITION BY b)
NULL	NULL	1
SELECT a, COUNT(a), AVG(a) OVER (PARTITION BY b) FROM t1
WHERE EXISTS ( SELECT * FROM t2 WHERE c IN ( SELECT MAX(d) FROM t3 ) );
a	COUNT(a)	AVG(a) OVER (PARTITION BY b)
NULL	0	NULL
SELECT a, MAX(a), AVG(a) OVER (PARTITION BY b) FROM t1
WHERE EXISTS ( SELECT * FROM t2 WHERE c IN ( SELECT MAX(d) FROM t3 ) );
a	MAX(a)	AVG(a) OVER (PARTITION BY b)
NULL	NULL	NULL
DROP TABLE t1,t2,t3;
#
# MDEV-10859: Wrong result of aggregate window function in query
#                  with HAVING and no ORDER BY
#
create table empsalary (depname varchar(32), empno smallint primary key, salary int);
insert into empsalary values
('develop', 1, 5000), ('develop', 2, 4000),('sales', 3, '6000'),('sales', 4, 5000);
SELECT depname, empno, salary, avg(salary) OVER (PARTITION BY depname) FROM empsalary;
depname	empno	salary	avg(salary) OVER (PARTITION BY depname)
develop	1	5000	4500.0000
develop	2	4000	4500.0000
sales	3	6000	5500.0000
sales	4	5000	5500.0000
SELECT depname, empno, salary, avg(salary) OVER (PARTITION BY depname) FROM empsalary ORDER BY depname;
depname	empno	salary	avg(salary) OVER (PARTITION BY depname)
develop	1	5000	4500.0000
develop	2	4000	4500.0000
sales	3	6000	5500.0000
sales	4	5000	5500.0000
#
# These last 2 should have the same row results, ignoring order.
#
SELECT depname, empno, salary, avg(salary) OVER (PARTITION BY depname) FROM empsalary HAVING empno > 1;
depname	empno	salary	avg(salary) OVER (PARTITION BY depname)
develop	2	4000	4000.0000
sales	3	6000	5500.0000
sales	4	5000	5500.0000
SELECT depname, empno, salary, avg(salary) OVER (PARTITION BY depname) FROM empsalary HAVING empno > 1 ORDER BY depname;
depname	empno	salary	avg(salary) OVER (PARTITION BY depname)
develop	2	4000	4000.0000
sales	3	6000	5500.0000
sales	4	5000	5500.0000
drop table empsalary;
#
# MDEV-11868: min(distinct) over () returns wrong value
#
create table TDEC (CDEC int, RNUM int);
create view VDEC as select * from TDEC;
insert into TDEC (CDEC) values (null),(-1),(0),(1),(0),(10);
select TDEC.CDEC, min(TDEC.CDEC) over () from TDEC;
CDEC	min(TDEC.CDEC) over ()
NULL	-1
-1	-1
0	-1
0	-1
1	-1
10	-1
select VDEC.CDEC, min(VDEC.CDEC) over () from VDEC;
CDEC	min(VDEC.CDEC) over ()
NULL	-1
-1	-1
0	-1
0	-1
1	-1
10	-1
select TDEC.CDEC, max(TDEC.CDEC) over () from TDEC;
CDEC	max(TDEC.CDEC) over ()
NULL	10
-1	10
0	10
0	10
1	10
10	10
select VDEC.CDEC, max(VDEC.CDEC) over () from VDEC;
CDEC	max(VDEC.CDEC) over ()
NULL	10
-1	10
0	10
0	10
1	10
10	10
select TDEC.CDEC, min(distinct TDEC.CDEC) over () from TDEC;
CDEC	min(distinct TDEC.CDEC) over ()
NULL	-1
-1	-1
0	-1
0	-1
1	-1
10	-1
select VDEC.CDEC, min(distinct VDEC.CDEC) over () from VDEC;
CDEC	min(distinct VDEC.CDEC) over ()
NULL	-1
-1	-1
0	-1
0	-1
1	-1
10	-1
select TDEC.CDEC, max(distinct TDEC.CDEC) over () from TDEC;
CDEC	max(distinct TDEC.CDEC) over ()
NULL	10
-1	10
0	10
0	10
1	10
10	10
select VDEC.CDEC, max(distinct VDEC.CDEC) over () from VDEC;
CDEC	max(distinct VDEC.CDEC) over ()
NULL	10
-1	10
0	10
0	10
1	10
10	10
#
# These should be removed once support for them is added.
#
select TDEC.CDEC, count(distinct TDEC.CDEC) over () from TDEC;
ERROR 42000: This version of MariaDB doesn't yet support 'COUNT(DISTINCT) aggregate as window function'
select VDEC.CDEC, count(distinct VDEC.CDEC) over () from VDEC;
ERROR 42000: This version of MariaDB doesn't yet support 'COUNT(DISTINCT) aggregate as window function'
select TDEC.CDEC, sum(distinct TDEC.CDEC) over () from TDEC;
ERROR 42000: This version of MariaDB doesn't yet support 'SUM(DISTINCT) aggregate as window function'
select VDEC.CDEC, sum(distinct VDEC.CDEC) over () from VDEC;
ERROR 42000: This version of MariaDB doesn't yet support 'SUM(DISTINCT) aggregate as window function'
select TDEC.CDEC, avg(distinct TDEC.CDEC) over () from TDEC;
ERROR 42000: This version of MariaDB doesn't yet support 'AVG(DISTINCT) aggregate as window function'
select VDEC.CDEC, avg(distinct VDEC.CDEC) over () from VDEC;
ERROR 42000: This version of MariaDB doesn't yet support 'AVG(DISTINCT) aggregate as window function'
select TDEC.CDEC, GROUP_CONCAT(TDEC.CDEC) over () from TDEC;
ERROR 42000: This version of MariaDB doesn't yet support 'GROUP_CONCAT() aggregate as window function'
select VDEC.CDEC, GROUP_CONCAT(distinct VDEC.CDEC) over () from VDEC;
ERROR 42000: This version of MariaDB doesn't yet support 'GROUP_CONCAT() aggregate as window function'
drop table TDEC;
drop view VDEC;
#
# MDEV-10700: 10.2.2 windowing function returns incorrect result
#
create table t(a int,b int, c int , d int);
insert into t(a,b,c,d) values(1, rand(10)*1000, rand(10)*1000, rand(10)*1000);
insert into t(a,b,c,d) values(1, rand(10)*1000, rand(10)*1000, rand(10)*1000);
replace into t(a,b,c,d) select 1, rand(10)*1000, rand(10)*1000, rand(10)*1000 from t t1, t t2, t t3, t t4, t t5, t t6, t t7, t t8, t t9, t t10, t t11, t t12, t t13, t t14, t t15, t t16, t t17;
select count(distinct s) from (select sum(d) over(partition by a,b,c) as s from t) Z where s > 0;
count(distinct s)
993
select count(distinct s) from (select sum(d) as s from t group by a,b,c) Z where s > 0;
count(distinct s)
993
select count(distinct s) from (select sum(d) over(partition by a,b) as s from t) Z where s > 0;
count(distinct s)
993
select count(distinct s) from (select sum(d) as s from t group by a,b) Z where s > 0;
count(distinct s)
993
select count(distinct s) from (select sum(d) over(partition by a) as s from t) Z where s > 0;
count(distinct s)
1
select count(distinct s) from (select sum(d) as s from t group by a) Z where s > 0;
count(distinct s)
1
drop table t;
#
# MDEV-9924: window function in query with group by optimized away 
#
create table t1 (i int);
insert into t1 values (2),(3),(1);
select row_number() over () from t1 group by 1+2;
row_number() over ()
1
select max(i), row_number() over () from t1 group by 1+2;
max(i)	row_number() over ()
3	1
select rank() over (order by max(i)) from t1 group by 1+2;
rank() over (order by max(i))
1
select i, row_number() over () from t1 group by 1+2;
i	row_number() over ()
2	1
select i, rank() over (order by i) rnk from t1 group by 1+2;
i	rnk
2	1
drop table t1;
#
# MDEV-11907: window function as the second operand of division
#
create table t1 (pk int, c int);
insert into t1 values (1,1),(2,1),(3,1),(4,1),(5,2);
set @sql_mode_save= @@sql_mode;
set sql_mode='ERROR_FOR_DIVISION_BY_ZERO';
select pk, c, c/count(*) over 
(partition by c order by pk
rows between 1 preceding and 2 following) as CNT
from t1;
pk	c	CNT
1	1	0.3333
2	1	0.2500
3	1	0.3333
4	1	0.5000
5	2	2.0000
show warnings;
Level	Code	Message
set sql_mode=@sql_mode_save;
drop table t1;
#
# MDEV-12336: several functions over a window function 
#
create table t1 (name varchar(10), cnt int);
insert into t1 values ('Fred', 23), ('Fred', 35), ('Joe', 10);
select q.name, q.row_cnt, 
round( 100 * ( q.row_cnt /
sum(q.row_cnt) over
( 
order by q.name 
rows between
unbounded preceding and
unbounded following
)
),2
) pct_of_total
from 
( 
select name, count(*) row_cnt, sum(cnt) sum_cnt 
from t1 
group by 1
) q;
name	row_cnt	pct_of_total
Fred	2	66.67
Joe	1	33.33
drop table t1;
#
# MDEV-11990: window function over min/max aggregation
#
create table t1 (id int);
insert into t1 values (1), (2), (3), (2), (4), (2);
select sum(max(id)) over (order by max(id)) from t1;
sum(max(id)) over (order by max(id))
4
explain
select sum(max(id)) over (order by max(id)) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	6	Using temporary
create index idx on t1(id);
select sum(max(id)) over (order by max(id)) from t1;
sum(max(id)) over (order by max(id))
4
explain
select sum(max(id)) over (order by max(id)) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
select sum(max(id)) over (order by max(id)) from t1 where id < 3;
sum(max(id)) over (order by max(id))
2
select count(max(id)) over (order by max(id)) from t1 where id < 3;
count(max(id)) over (order by max(id))
1
select max(id), rank() over (order by max(id)) from t1 where id < 3;
max(id)	rank() over (order by max(id))
2	1
drop table t1;
#
# main.win failure post MDEV-12336
#
create table t(a decimal(35,10), b int);
insert into t values (1, 10), (2, 20), (3, 30);
prepare stmt from "SELECT (CASE WHEN sum(t.a) over (partition by t.b)=1 THEN 1000 ELSE 300 END) AS a FROM t";
execute stmt;
a
1000
300
300
drop table t;
#
# MDEV-12851 case with window functions query crashes server
#
create table t1(dt datetime);
insert into t1 values ('2017-05-17'), ('2017-05-18');
select dt,
case when (max(dt) over (order by dt rows between 1 following and 1 following) is null)
then '9999-12-31 12:00:00'
       else max(dt) over (order by dt rows between 1 following and 1 following)
end x,
case when (max(dt) over (order by dt rows between 1 following and 1 following) is not null)
then '9999-12-31 12:00:00'
       else max(dt) over (order by dt rows between 1 following and 1 following)
end x
from t1;
dt	x	x
2017-05-17 00:00:00	2017-05-18 00:00:00	9999-12-31 12:00:00
2017-05-18 00:00:00	9999-12-31 12:00:00	NULL
drop table t1;
create table t1(i int);
insert into t1 values (null),(1),(2);
select max(i) over (order by i),
max(i) over (order by i) is null,
max(i) over (order by i) is not null
from t1;
max(i) over (order by i)	max(i) over (order by i) is null	max(i) over (order by i) is not null
NULL	1	0
1	0	1
2	0	1
drop table t1;
#
# MDEV-13189: Window functions crash when using INTERVAL function
#
create table t1(i int);
insert into t1 values (1),(2),(10),(20),(30);
select sum(i) over (order by i), interval(sum(i) over (order by i), 10, 20)
from t1;
sum(i) over (order by i)	interval(sum(i) over (order by i), 10, 20)
1	0
3	0
13	1
33	2
63	2
drop table t1;
#
# MDEV-13352: Server crashes in st_join_table::remove_duplicates
#
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (1),(2);
SELECT DISTINCT ROW_NUMBER() OVER(), i FROM t1 WHERE 0;
ROW_NUMBER() OVER()	i
SELECT ROW_NUMBER() OVER(), i FROM t1 WHERE 0;
ROW_NUMBER() OVER()	i
DROP TABLE t1;
#
# MDEV-13344: Server crashes in in AGGR_OP::put_record on subquery 
#             with window function and constant table
# (Testcase only)
#
CREATE TABLE t1 (c CHAR(8)) ENGINE=MyISAM;
INSERT IGNORE INTO t1 VALUES ('foo');
SELECT ('bar',1) IN ( SELECT c, ROW_NUMBER() OVER (PARTITION BY c) FROM t1);
('bar',1) IN ( SELECT c, ROW_NUMBER() OVER (PARTITION BY c) FROM t1)
0
DROP TABLE t1;
#
# MDEV-13351: Server crashes in st_select_lex::set_explain_type upon UNION with window function 
#
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (1),(2);
SELECT Nth_value(i,1) OVER() FROM t1 
UNION ALL 
( SELECT Nth_value(i,2) OVER() FROM t1 LIMIT 0 )
;
Nth_value(i,1) OVER()
1
1
DROP TABLE t1;
#
# A regression after MDEV-13351:
# MDEV-13374 : Server crashes in first_linear_tab / st_select_lex::set_explain_type 
#              upon UNION with aggregate function	
#
CREATE TABLE t1 (i INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
SELECT i AS fld FROM t1 UNION SELECT COUNT(*) AS fld FROM t1;
fld
1
2
DROP TABLE t1;
#
# MDEV-13240 Wrong warning with MAX(datetime_field) OVER (...)
#
CREATE TABLE t1 (dt DATETIME);
INSERT INTO t1 VALUES ('2017-05-17');
SELECT MAX(dt) OVER (ORDER BY dt ROWS BETWEEN 1 FOLLOWING AND 1 FOLLOWING) FROM t1;
MAX(dt) OVER (ORDER BY dt ROWS BETWEEN 1 FOLLOWING AND 1 FOLLOWING)
NULL
DROP TABLE t1;
#
# MDEV-13358 FIRST_VALUE throws SQL Error (1292): Incorrect datetime value
#
CREATE TABLE IF NOT EXISTS `fv_test` (
`SOME_DATE` datetime NOT NULL
);
INSERT INTO `fv_test` (`SOME_DATE`) VALUES ('2017-07-20 12:47:56');
CREATE TABLE fv_result
SELECT
FIRST_VALUE(SOME_DATE) OVER(ORDER BY SOME_DATE DESC) AS somedate
FROM fv_test;
SHOW CREATE TABLE fv_result;
Table	Create Table
fv_result	CREATE TABLE `fv_result` (
  `somedate` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
SELECT * FROM fv_result;
somedate
2017-07-20 12:47:56
DROP TABLE fv_test, fv_result;
#
# MDEV-13649: Server crashes in set_field_to_null_with_conversions or in Field::set_notnull
#
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (0),(1),(2);
SELECT LEAD(a) OVER (PARTITION BY a ORDER BY a) as lead,
a AND LEAD(a) OVER (PARTITION BY a ORDER BY a) AS a_and_lead_part
FROM t1;
lead	a_and_lead_part
NULL	0
NULL	NULL
NULL	NULL
SELECT a OR LEAD(a) OVER (ORDER BY a) AS a_or_lead_order
FROM t1
ORDER BY a;
a_or_lead_order
1
1
1
SELECT a AND LEAD(a) OVER (ORDER BY a) AS a_and_lead_order
FROM t1
ORDER BY a;
a_and_lead_order
0
1
NULL
SELECT a XOR LEAD(a) OVER (ORDER BY a) AS a_xor_lead_order
FROM t1
ORDER BY a;
a_xor_lead_order
1
0
NULL
SELECT NOT LEAD(a) OVER (ORDER BY a) AS not_lead_order
FROM t1
ORDER BY a;
not_lead_order
0
0
NULL
SELECT LEAD(a) OVER (ORDER BY a) is not null AS is_not_null_lead_order
FROM t1
ORDER BY a;
is_not_null_lead_order
1
1
0
drop table t1;
#
# MDEV-13354: Server crashes in find_field_in_tables upon PS with window function and subquery
#
CREATE TABLE t1 (i INT, a char);
INSERT INTO t1 VALUES (1, 'a'),(2, 'b');
PREPARE stmt FROM "SELECT row_number() over (partition by i order by i), i FROM (SELECT * from t1) as sq";
EXECUTE stmt;
row_number() over (partition by i order by i)	i
1	1
1	2
DROP TABLE t1;
#
# MDEV-13384: "window" seems like a reserved column name but it's not listed as one
#
# Currently we allow window as an identifier, except for table aliases.
#
CREATE TABLE door (id INT, window VARCHAR(10));
SELECT id
FROM door as window;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'window' at line 2
SELECT id, window
FROM door;
id	window
SELECT id, window
FROM door as window;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'window' at line 2
DROP TABLE door;
#
# MDEV-13352: Server crashes in st_join_table::remove_duplicates
#
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (1),(2);
SELECT DISTINCT ROW_NUMBER() OVER(), i FROM t1 WHERE 0;
ROW_NUMBER() OVER()	i
SELECT ROW_NUMBER() OVER(), i FROM t1 WHERE 0;
ROW_NUMBER() OVER()	i
DROP TABLE t1;
#
# MDEV-15853: Assertion `tab->filesort_result == 0' failed
#
CREATE TABLE t1 ( a1 int);
insert into t1 values (1),(2),(3);
CREATE TABLE t2 (b1 int, a1 int, a2 int);
insert into t2 values (1,2,3),(2,3,4),(3,4,5);
SELECT COUNT(DISTINCT t2.a2),
rank() OVER (ORDER BY t2.b1)
FROM t2 ,t1 GROUP BY t2.b1 ORDER BY t1.a1;
COUNT(DISTINCT t2.a2)	rank() OVER (ORDER BY t2.b1)
1	1
1	2
1	3
DROP TABLE t1,t2;
#
# MDEV-16990: server crashes in base_list_iterator::next
#
CREATE TABLE t1(i int);
insert into t1 values (1),(2);
SELECT DISTINCT row_number() OVER (), MAX(1) FROM t1;
row_number() OVER ()	MAX(1)
1	1
SELECT DISTINCT BIT_AND(0)  OVER (), MAX(1) FROM t1;
BIT_AND(0)  OVER ()	MAX(1)
0	1
drop table t1;
#
# MDEV-17525: Window functions not working in ONLY_FULL_GROUP_BY mode
#
CREATE TABLE t1 (name CHAR(10), test CHAR(10), score TINYINT);
INSERT INTO t1 VALUES
('Chun', 'SQL', 75), ('Chun', 'Tuning', 73),
('Esben', 'SQL', 43), ('Esben', 'Tuning', 31),
('Kaolin', 'SQL', 56), ('Kaolin', 'Tuning', 88),
('Tatiana', 'SQL', 87), ('Tatiana', 'Tuning', 83);
SET @save_sql_mode= @@sql_mode;
SET sql_mode = 'ONLY_FULL_GROUP_BY';
SELECT name, test, score,
AVG(score) OVER (PARTITION BY test) AS average_by_test
FROM t1
ORDER BY test, name;
name	test	score	average_by_test
Chun	SQL	75	65.2500
Esben	SQL	43	65.2500
Kaolin	SQL	56	65.2500
Tatiana	SQL	87	65.2500
Chun	Tuning	73	68.7500
Esben	Tuning	31	68.7500
Kaolin	Tuning	88	68.7500
Tatiana	Tuning	83	68.7500
set @@sql_mode= @save_sql_mode;
SELECT name, test, score,
AVG(score) OVER (PARTITION BY test) AS average_by_test
FROM t1
ORDER BY test, name;
name	test	score	average_by_test
Chun	SQL	75	65.2500
Esben	SQL	43	65.2500
Kaolin	SQL	56	65.2500
Tatiana	SQL	87	65.2500
Chun	Tuning	73	68.7500
Esben	Tuning	31	68.7500
Kaolin	Tuning	88	68.7500
Tatiana	Tuning	83	68.7500
drop table t1;
#
# MDEV-12575: Server crash in AGGR_OP::put_record or in JOIN_CACHE::free
# or Invalid write in JOIN::make_aggr_tables_info
#
SELECT DISTINCT BIT_OR(100) OVER () FROM dual
GROUP BY LEFT('2018-08-24', 100)  order by 1+2;
BIT_OR(100) OVER ()
100
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (1),(2);
SELECT * FROM (
SELECT
ROW_NUMBER() OVER(), i, sum(i)
FROM t1
WHERE 1=0
limit 0
) AS sq;
ROW_NUMBER() OVER()	i	sum(i)
SELECT * FROM (
SELECT
ROW_NUMBER() OVER(), i, sum(i)
FROM t1
WHERE 1=0
GROUP BY i
) AS sq;
ROW_NUMBER() OVER()	i	sum(i)
drop table t1;
create table t1 (a int);
explain
select distinct 1, row_number() over (order by 1) from t1 where a=0 group by a with rollup;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
select distinct 1, row_number() over (order by 1) from t1 where a=0 group by a with rollup;
1	row_number() over (order by 1)
drop table t1;
explain
SELECT DISTINCT BIT_OR(100) OVER () FROM dual
GROUP BY LEFT('2018-08-24', 100) WITH ROLLUP
HAVING @A := 'qwerty';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible HAVING
SELECT DISTINCT BIT_OR(100) OVER () FROM dual
GROUP BY LEFT('2018-08-24', 100) WITH ROLLUP
HAVING @A := 'qwerty';
BIT_OR(100) OVER ()
explain
SELECT DISTINCT BIT_OR(100) OVER () FROM dual
GROUP BY LEFT('2018-08-24', 100)
HAVING @A := 'qwerty';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible HAVING
SELECT DISTINCT BIT_OR(100) OVER () FROM dual
GROUP BY LEFT('2018-08-24', 100)
HAVING @A := 'qwerty';
BIT_OR(100) OVER ()
create table t1 (a int);
explain
SELECT DISTINCT BIT_OR(100) OVER () FROM t1
GROUP BY LEFT('2018-08-24', 100) having 1=1 limit 0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Zero limit
drop table t1;
#
# MDEV-13170: Database service (MySQL) stops after update with trigger
#
CREATE TABLE t1 ( t1_id int, point_id int, ml_id int,  UNIQUE KEY t1_ml_u (ml_id,point_id)) ;
INSERT INTO t1 VALUES (1,1,8884),(2,1,8885);
CREATE TABLE t2 ( db_time datetime, au_nr int, col_id int, new_val int);
CREATE TABLE t3 (id1 int, id2 int, d1 int);
CREATE  TRIGGER t1_aurtrg AFTER UPDATE ON t1 FOR EACH ROW begin
CREATE OR REPLACE TEMPORARY TABLE trg_u AS
WITH l AS
(SELECT a.*,
Max(t2.col_id) over (PARTITION BY a.d1),
Max(t2.new_val) over (PARTITION BY a.d1)
FROM
(SELECT d1 , id1, id2  FROM t3) a
JOIN t2  ON (a.d1=t2.db_time AND a.id1=t2.au_nr))
SELECT 1;
END;//
update t1 set ml_id=8884 where point_id=1;
ERROR 23000: Duplicate entry '8884-1' for key 't1_ml_u'
update t1 set ml_id=8884 where point_id=1;
ERROR 23000: Duplicate entry '8884-1' for key 't1_ml_u'
drop table t1, t2,t3;
CREATE TABLE t1 (i INT, a char);
INSERT INTO t1 VALUES (1, 'a'),(2, 'b');
create view v1 as select * from t1;
PREPARE stmt FROM "SELECT i, row_number() over (partition by i order by i) FROM v1";
execute stmt;
i	row_number() over (partition by i order by i)
1	1
2	1
deallocate prepare stmt;
drop table t1;
drop view v1;
#
# MDEV-17676: Assertion `inited==NONE || (inited==RND && scan)' failed in handler::ha_rnd_init
#
CREATE TABLE t1 (b1 text NOT NULL);
INSERT INTO t1 VALUES  ('2'),('1');
EXPLAIN
SELECT DISTINCT MIN(b1) OVER () FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using temporary
SELECT DISTINCT MIN(b1) OVER () FROM t1;
MIN(b1) OVER ()
1
drop table t1;
#
# MDEV-15424: Unreasonal SQL Error (1356) on select from view
#
create table t1 (id int, n1 int);
insert into t1 values (1,1), (2,1), (3,2), (4,4);
create view v1 as SELECT ifnull(max(n1) over (partition by n1),'aaa') FROM t1;
explain select * from v1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	4	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	4	Using temporary
select * from v1;
ifnull(max(n1) over (partition by n1),'aaa')
1
1
2
4
drop table t1;
drop view v1;
#
# MDEV-18431: Select max + row_number giving incorrect result
#
create table t1 (id int, v int);
insert into t1 values (1, 1), (1,2), (1,3), (2, 1), (2, 2);
select e.id,
(select max(t1.v) from t1 where t1.id=e.id) as a,
row_number() over (partition by e.id order by e.v) as b,
(select max(t1.v) from t1 where t1.id=e.id) + (row_number() over (partition by e.id order by e.v)) as sum_a_b
from t1 e;
id	a	b	sum_a_b
1	3	1	4
1	3	2	5
1	3	3	6
2	2	1	3
2	2	2	4
drop table t1;
#
# MDEV-15837: Assertion `item1->type() == Item::FIELD_ITEM && item2->type() == Item::FIELD_ITEM'
# failed in compare_order_elements function
#
CREATE TABLE t1 (a1 int);
insert into t1 values (1),(2),(3);
SELECT  rank() OVER (ORDER BY 1), ROW_NUMBER() OVER (ORDER BY (EXPORT_SET(5,'Y','N',',',4))) FROM t1;
rank() OVER (ORDER BY 1)	ROW_NUMBER() OVER (ORDER BY (EXPORT_SET(5,'Y','N',',',4)))
1	1
1	2
1	3
drop table t1;
#
# MDEV-17781: Server crashes in next_linear_tab
#
CREATE TABLE t1 (i1 int);
explain
(SELECT AVG(0) OVER (), MAX('2') FROM t1)
UNION ALL
(SELECT AVG(0) OVER (), MAX('2') FROM t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
(SELECT AVG(0) OVER (), MAX('2') FROM t1)
UNION ALL
(SELECT AVG(0) OVER (), MAX('2') FROM t1);
AVG(0) OVER ()	MAX('2')
0.0000	NULL
0.0000	NULL
drop table t1;
#
# MDEV-14791: Crash with order by expression containing window functions
#
CREATE TABLE t1 (b1 int, b2 int);
INSERT INTO t1 VALUES (1,1),(0,0);
explain
SELECT b1 from t1 order by row_number() over (ORDER BY b2) + 1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using temporary; Using filesort
SELECT b1 from t1 order by row_number() over (ORDER BY b2) + 1;
b1
0
1
explain
SELECT b1 from t1 order by row_number() over (ORDER BY b2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using temporary; Using filesort
SELECT b1 from t1 order by row_number() over (ORDER BY b2);
b1
0
1
DROP TABLE t1;
CREATE TABLE t1 (a int, b int, c int);
INSERT INTO t1 VALUES (2,3,207), (1,21,909), (7,13,312), (8,64,248);
explain
SELECT * FROM t1 ORDER BY max(t1.a) over (partition by c);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	Using temporary; Using filesort
SELECT * FROM t1 ORDER BY max(t1.a) over (partition by c);
a	b	c
1	21	909
2	3	207
7	13	312
8	64	248
explain
SELECT max(t1.a) over (partition by c) as x, b, c from t1 order by max(t1.a) over (partition by c);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	Using temporary; Using filesort
SELECT max(t1.a) over (partition by c) as x, b, c from t1 order by max(t1.a) over (partition by c);
x	b	c
1	21	909
2	3	207
7	13	312
8	64	248
drop table t1;
#
# MDEV-18373: DENSE_RANK is not calculated correctly
#
create table t1 (a int, b int);
insert into t1 values (60, 1515),(60, 2000),(70, 2000),(55, 1600);
select b, dense_rank() over (order by sum(a)) from t1 group by  b;
b	dense_rank() over (order by sum(a))
1515	2
1600	1
2000	3
select b, dense_rank() over (order by sum(a)+1) from t1 group by  b;
b	dense_rank() over (order by sum(a)+1)
1515	2
1600	1
2000	3
select b, row_number() over (partition by sum(a)) from t1 group by b;
b	row_number() over (partition by sum(a))
1515	1
1600	1
2000	1
select b, row_number() over (partition by sum(a)+1) from t1 group by b;
b	row_number() over (partition by sum(a)+1)
1515	1
1600	1
2000	1
drop table t1;
#
# MDEV-18015: Assertion `global_status_var.global_memory_used == 0' failed when using UDF,
# window functions and views
#
create table t1 (id int, n1 int);
insert into t1 values (1,1),(2,1),(3,2),(4,4);
explain
select max(n1) over (partition by 'abc') from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	Using temporary
select max(n1) over (partition by 'abc') from t1;
max(n1) over (partition by 'abc')
4
4
4
4
explain
select rank() over (partition by 'abc' order by 'xyz') from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	Using temporary
select rank() over (partition by 'abc' order by 'xyz') from t1;
rank() over (partition by 'abc' order by 'xyz')
1
1
1
1
drop table t1;
#
# MDEV-19380: ASAN heap-use-after-free in Protocol::net_store_data
#
CREATE TABLE t1 (i int);
INSERT INTO t1 VALUES (1),(2),(3);
SELECT (SELECT MIN('foo') OVER() FROM t1 LIMIT 1) as x;
x
foo
drop table t1;
#
# MDEV-16579: Wrong result of query using DISTINCT COUNT(*) OVER (*)
#
CREATE TABLE t1 (i int) ;
INSERT INTO t1 VALUES (1),(0),(1),(2),(0),(1),(2),(1),(2);
SELECT  DISTINCT COUNT(*) OVER (), MOD(MIN(i),2) FROM t1 GROUP BY i ;
COUNT(*) OVER ()	MOD(MIN(i),2)
3	0
3	1
drop table t1;
#
# MDEV-21318: Wrong results with window functions and implicit grouping
#
CREATE TABLE t1 (a INT);
#
#  With empty const table
#  The expected result here is 1, NULL
#
explain
SELECT row_number() over(), sum(1) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	0	Const row not found; Using temporary
SELECT row_number() over(), sum(1) FROM t1;
row_number() over()	sum(1)
1	NULL
insert into t1 values (2);
#
#  Const table has 1 row, but still impossible where
#  The expected result here is 1, NULL
#
EXPLAIN SELECT row_number() over(), sum(1) FROM t1 where a=1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
SELECT row_number() over(), sum(1) FROM t1 where a=1;
row_number() over()	sum(1)
1	NULL
#
#  Impossible HAVING
#  Empty result is expected
#
EXPLAIN SELECT row_number() over(), sum(1) FROM t1 where a=1 having 1=0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible HAVING
SELECT row_number() over(), sum(1) FROM t1 where a=1 having 1=0;
row_number() over()	sum(1)
#
#  const table has 1 row, no impossible where
#  The expected result here is 1, 2
#
EXPLAIN SELECT row_number() over(), sum(a) FROM t1 where a=2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	1	Using temporary
SELECT row_number() over(), sum(a) FROM t1 where a=2;
row_number() over()	sum(a)
1	2
drop table t1;
#
# Impossible Where
#
create table t1(a int);
insert into t1 values (1);
#
# Expected result is NULL, 0, NULL
#
EXPLAIN SELECT MAX(a) OVER (), COUNT(a), abs(a)  FROM t1 WHERE FALSE;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
SELECT MAX(a) OVER (), COUNT(a), abs(a)  FROM t1 WHERE FALSE;
MAX(a) OVER ()	COUNT(a)	abs(a)
NULL	0	NULL
#
# Expected result is 1, 0, NULL
#
EXPLAIN
SELECT MAX(1) OVER (), COUNT(a), abs(a)  FROM t1 WHERE FALSE;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE
SELECT MAX(1) OVER (), COUNT(a), abs(a)  FROM t1 WHERE FALSE;
MAX(1) OVER ()	COUNT(a)	abs(a)
1	0	NULL
drop table t1;
#
# End of 10.2 tests
#
#
# MDEV-16489 when lead() returns null on a datetime field, the result is treated as the literal string '[NULL]'
#
CREATE TABLE t1 (d datetime);
INSERT INTO t1 VALUES ('2018-01-01 00:00:00'),('2018-02-01 00:00:00');
SELECT *, LEAD(d) OVER (ORDER BY d) AS x FROM t1;
d	x
2018-01-01 00:00:00	2018-02-01 00:00:00
2018-02-01 00:00:00	NULL
DROP TABLE t1;
CREATE TABLE t1 (d time);
INSERT INTO t1 VALUES ('00:00:01'),('00:00:02');
SELECT *, LEAD(d) OVER (ORDER BY d) AS x FROM t1;
d	x
00:00:01	00:00:02
00:00:02	NULL
DROP TABLE t1;
#
# MDEV-20351 Window function BIT_OR() OVER (..) return a wrong data type
#
CREATE TABLE t1 (pk INT, a INT, b BIGINT UNSIGNED);
INSERT INTO t1 VALUES (1, 0, 1), (2, 0, 18446744073709551615);
CREATE TABLE t2 AS
SELECT pk, a, bit_or(b) AS bit_or FROM t1 GROUP BY pk;
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `pk` int(11) DEFAULT NULL,
  `a` int(11) DEFAULT NULL,
  `bit_or` bigint(21) unsigned NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
SELECT * FROM t1;
pk	a	b
1	0	1
2	0	18446744073709551615
DROP TABLE t2;
CREATE OR REPLACE TABLE t2 AS
SELECT pk, a, BIT_OR(b) OVER (PARTITION BY a ORDER BY pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) AS bit_or
FROM t1;
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `pk` int(11) DEFAULT NULL,
  `a` int(11) DEFAULT NULL,
  `bit_or` bigint(21) unsigned NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
SELECT * FROM t2;
pk	a	bit_or
1	0	18446744073709551615
2	0	18446744073709551615
DROP TABLE t2;
DROP TABLE t1;
#
# End of 10.3 tests
#
#
# MDEV-16722: Assertion `type() != NULL_ITEM' failed
#
create table t1 (a int);
insert into t1 values (1),(2),(3);
SELECT  row_number() OVER (order by a) FROM t1  order by NAME_CONST('myname',NULL);
row_number() OVER (order by a)
1
2
3
drop table t1;