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mariadb/mysql-test/r/win.result
Sergei Petrunia 306de8a927 MDEV-9877: Window functions: wrong sort criteria is used 
" The sort order for the sub-sequence of window functions starting
from the element marked by SORTORDER_CHANGE_FLAG up to the next
element marked by SORTORDER_CHANGE_FLAG must be taken from the
last element of the sub-sequence (not from the first one)."
2016-04-06 23:02:31 +03:00

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drop table if exists t1,t2;
# ########################################################################
# # 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 10 zz 3
2 20 yy 2
3 10 xxx 2
3 20 vvv 1
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;
pk a b row_number() over (order by a) row_number() over (order by b)
1 10 22 1 5
2 11 21 2 4
3 12 20 3 3
4 13 19 4 2
5 14 18 5 1
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
2 0 1
3 1 3
4 1 3
8 2 5
5 2 5
6 2 5
7 2 5
9 4 9
10 4 9
select pk, a, rank() over (order by a desc) from t2;
pk a rank() over (order by a desc)
1 0 9
2 0 9
3 1 7
4 1 7
8 2 3
5 2 3
6 2 3
7 2 3
9 4 1
10 4 1
drop table t2;
#
# Try DENSE_RANK() function
#
create table t3 (
pk int primary key,
a int,
b int
);
insert into t3 values
( 1 , 0, 10),
( 2 , 0, 10),
( 3 , 1, 10),
( 4 , 1, 10),
( 8 , 2, 10),
( 5 , 2, 20),
( 6 , 2, 20),
( 7 , 2, 20),
( 9 , 4, 20),
(10 , 4, 20);
select pk, a, b, rank() over (order by a), dense_rank() over (order by a) from t3;
pk a b rank() over (order by a) dense_rank() over (order by a)
1 0 10 1 1
2 0 10 1 1
3 1 10 3 2
4 1 10 3 2
8 2 10 5 3
5 2 20 5 3
6 2 20 5 3
7 2 20 5 3
9 4 20 9 4
10 4 20 9 4
select pk, a, b, rank() over (partition by b order by a), dense_rank() over (partition by b order by a) from t3;
pk a b rank() over (partition by b order by a) dense_rank() over (partition by b order by a)
1 0 10 1 1
2 0 10 1 1
3 1 10 3 2
4 1 10 3 2
8 2 10 5 3
5 2 20 1 1
6 2 20 1 1
7 2 20 1 1
9 4 20 4 2
10 4 20 4 2
drop table t3;
#
# 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
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;
#
# 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
pk,
val,
count(val) over (order by val
range between current row and
current row)
as CNT
from t3;
pk val CNT
0 1 3
1 1 3
2 1 3
3 2 4
4 2 4
5 2 4
6 2 4
insert into t3 values
(7, 3),
(8, 3);
select
pk,
val,
count(val) over (order by val
range between current row and
current row)
as CNT
from t3;
pk val CNT
0 1 3
1 1 3
2 1 3
3 2 4
4 2 4
5 2 4
6 2 4
7 3 2
8 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,
pk,
val,
count(val) over (partition by part_id
order by val
range between current row and
current row)
as CNT
from t4;
part_id pk val CNT
1234 100 1 3
1234 101 1 3
1234 102 1 3
1234 103 2 4
1234 104 2 4
1234 105 2 4
1234 106 2 4
1234 107 3 2
1234 108 3 2
5678 200 1 3
5678 201 1 3
5678 202 1 3
5678 203 2 4
5678 204 2 4
5678 205 2 4
5678 206 2 4
5678 207 3 2
5678 208 3 2
#
# Try RANGE UNBOUNDED PRECEDING | FOLLOWING
#
select
part_id,
pk,
val,
count(val) over (partition by part_id
order by val
range between unbounded preceding and
current row)
as CNT
from t4;
part_id pk val CNT
1234 100 1 3
1234 101 1 3
1234 102 1 3
1234 103 2 7
1234 104 2 7
1234 105 2 7
1234 106 2 7
1234 107 3 9
1234 108 3 9
5678 200 1 3
5678 201 1 3
5678 202 1 3
5678 203 2 7
5678 204 2 7
5678 205 2 7
5678 206 2 7
5678 207 3 9
5678 208 3 9
select
part_id,
pk,
val,
count(val) over (partition by part_id
order by val
range between current row and
unbounded following)
as CNT
from t4;
part_id pk val CNT
1234 100 1 9
1234 101 1 9
1234 102 1 9
1234 103 2 6
1234 104 2 6
1234 105 2 6
1234 106 2 6
1234 107 3 2
1234 108 3 2
5678 200 1 9
5678 201 1 9
5678 202 1 9
5678 203 2 6
5678 204 2 6
5678 205 2 6
5678 206 2 6
5678 207 3 2
5678 208 3 2
select
part_id,
pk,
val,
count(val) over (partition by part_id
order by val
range between unbounded preceding and
unbounded following)
as CNT
from t4;
part_id pk val CNT
1234 100 1 9
1234 101 1 9
1234 102 1 9
1234 103 2 9
1234 104 2 9
1234 105 2 9
1234 106 2 9
1234 107 3 9
1234 108 3 9
5678 200 1 9
5678 201 1 9
5678 202 1 9
5678 203 2 9
5678 204 2 9
5678 205 2 9
5678 206 2 9
5678 207 3 9
5678 208 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
1 1 9
2 2 9
3 4 9
4 8 9
5 26 5
6 27 5
7 40 3
8 71 2
9 72 2
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
1 1 5
2 2 5
3 4 5
4 8 5
5 26 3
6 27 3
7 40 2
8 71 0
9 72 0
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
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
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
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
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;
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,
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=@@big_tables;
set big_tables=1;
select rank() over (order by a) from t1;
rank() over (order by a)
1
2
3
4
5
6
7
8
9
10
set big_tables=@tmp;
drop table t1;
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