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Commit 1c724413 authored by Vicențiu Ciorbaru's avatar Vicențiu Ciorbaru
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Frame bounds using FOLLOWING or PRECEDING can have 0 as cardinal value 

This makes them behave exactly like CURRENT ROW. Standard specifies
unsigned integer, which includes the value 0.

Expand the win_min_max test to include this kind of frame definitions.
parent 954e4653
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mysql-test/r/win_min_max.result
View file @ 1c724413
...@@ -94,4 +94,771 @@ pk a c min max ...@@ -94,4 +94,771 @@ pk a c min max
125 6 NULL -10.4 -10.4 125 6 NULL -10.4 -10.4
126 6 NULL NULL NULL 126 6 NULL NULL NULL
127 6 NULL NULL NULL 127 6 NULL NULL NULL
create table t2 (
pk int primary key,
a int,
b int,
c char(10)
);
insert into t2 values
( 1, 0, 1, 'one'),
( 2, 0, 2, 'two'),
( 3, 0, 3, 'three'),
( 4, 1, 20, 'four'),
( 5, 1, 10, 'five'),
( 6, 1, 40, 'six'),
( 7, 1, 30, 'seven'),
( 8, 4,300, 'eight'),
( 9, 4,100, 'nine'),
(10, 4,200, 'ten'),
(11, 4,200, 'eleven');
# First try some invalid argument queries.
select pk, a, b, c,
min(c) over (order by pk),
max(c) over (order by pk),
min(c) over (partition by a order by pk),
max(c) over (partition by a order by pk)
from t2;
pk a b c min(c) over (order by pk) max(c) over (order by pk) min(c) over (partition by a order by pk) max(c) over (partition by a order by pk)
1 0 1 one one one one one
2 0 2 two one two one two
3 0 3 three one two one two
4 1 20 four four two four four
5 1 10 five five two five four
6 1 40 six five two five six
7 1 30 seven five two five six
8 4 300 eight eight two eight eight
9 4 100 nine eight two eight nine
10 4 200 ten eight two eight ten
11 4 200 eleven eight two eight ten
# Empty frame
select pk, a, b, c,
min(b) over (order by pk rows between 2 following and 1 following) as min1,
max(b) over (order by pk rows between 2 following and 1 following) as max1,
min(b) over (partition by a order by pk rows between 2 following and 1 following) as min2,
max(b) over (partition by a order by pk rows between 2 following and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk range between 2 following and 1 following) as min1,
max(b) over (order by pk range between 2 following and 1 following) as max1,
min(b) over (partition by a order by pk range between 2 following and 1 following) as min2,
max(b) over (partition by a order by pk range between 2 following and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk rows between 1 preceding and 2 preceding) as min1,
max(b) over (order by pk rows between 1 preceding and 2 preceding) as max1,
min(b) over (partition by a order by pk rows between 1 preceding and 2 preceding) as min2,
max(b) over (partition by a order by pk rows between 1 preceding and 2 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk range between 1 preceding and 2 preceding) as min1,
max(b) over (order by pk range between 1 preceding and 2 preceding) as max1,
min(b) over (partition by a order by pk range between 1 preceding and 2 preceding) as min2,
max(b) over (partition by a order by pk range between 1 preceding and 2 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk rows between 1 following and 0 following) as min1,
max(b) over (order by pk rows between 1 following and 0 following) as max1,
min(b) over (partition by a order by pk rows between 1 following and 0 following) as min2,
max(b) over (partition by a order by pk rows between 1 following and 0 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk range between 1 following and 0 following) as min1,
max(b) over (order by pk range between 1 following and 0 following) as max1,
min(b) over (partition by a order by pk range between 1 following and 0 following) as min2,
max(b) over (partition by a order by pk range between 1 following and 0 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk rows between 1 following and 0 preceding) as min1,
max(b) over (order by pk rows between 1 following and 0 preceding) as max1,
min(b) over (partition by a order by pk rows between 1 following and 0 preceding) as min2,
max(b) over (partition by a order by pk rows between 1 following and 0 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk range between 1 following and 0 preceding) as min1,
max(b) over (order by pk range between 1 following and 0 preceding) as max1,
min(b) over (partition by a order by pk range between 1 following and 0 preceding) as min2,
max(b) over (partition by a order by pk range between 1 following and 0 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk rows between 0 following and 1 preceding) as min1,
max(b) over (order by pk rows between 0 following and 1 preceding) as max1,
min(b) over (partition by a order by pk rows between 0 following and 1 preceding) as min2,
max(b) over (partition by a order by pk rows between 0 following and 1 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk range between 0 following and 1 preceding) as min1,
max(b) over (order by pk range between 0 following and 1 preceding) as max1,
min(b) over (partition by a order by pk range between 0 following and 1 preceding) as min2,
max(b) over (partition by a order by pk range between 0 following and 1 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four NULL NULL NULL NULL
5 1 10 five NULL NULL NULL NULL
6 1 40 six NULL NULL NULL NULL
7 1 30 seven NULL NULL NULL NULL
8 4 300 eight NULL NULL NULL NULL
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
# 1 row frame.
select pk, a, b, c,
min(b) over (order by pk rows between current row and current row) as min1,
max(b) over (order by pk rows between current row and current row) as max1,
min(b) over (partition by a order by pk rows between current row and current row) as min2,
max(b) over (partition by a order by pk rows between current row and current row) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 2 2 2 2
3 0 3 three 3 3 3 3
4 1 20 four 20 20 20 20
5 1 10 five 10 10 10 10
6 1 40 six 40 40 40 40
7 1 30 seven 30 30 30 30
8 4 300 eight 300 300 300 300
9 4 100 nine 100 100 100 100
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk rows between 0 preceding and current row) as min1,
max(b) over (order by pk rows between 0 preceding and current row) as max1,
min(b) over (partition by a order by pk rows between 0 preceding and current row) as min2,
max(b) over (partition by a order by pk rows between 0 preceding and current row) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 2 2 2 2
3 0 3 three 3 3 3 3
4 1 20 four 20 20 20 20
5 1 10 five 10 10 10 10
6 1 40 six 40 40 40 40
7 1 30 seven 30 30 30 30
8 4 300 eight 300 300 300 300
9 4 100 nine 100 100 100 100
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk rows between 0 preceding and 0 preceding) as min1,
max(b) over (order by pk rows between 0 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk rows between 0 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk rows between 0 preceding and 0 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 2 2 2 2
3 0 3 three 3 3 3 3
4 1 20 four 20 20 20 20
5 1 10 five 10 10 10 10
6 1 40 six 40 40 40 40
7 1 30 seven 30 30 30 30
8 4 300 eight 300 300 300 300
9 4 100 nine 100 100 100 100
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk rows between 1 preceding and 1 preceding) as min1,
max(b) over (order by pk rows between 1 preceding and 1 preceding) as max1,
min(b) over (partition by a order by pk rows between 1 preceding and 1 preceding) as min2,
max(b) over (partition by a order by pk rows between 1 preceding and 1 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two 1 1 1 1
3 0 3 three 2 2 2 2
4 1 20 four 3 3 NULL NULL
5 1 10 five 20 20 20 20
6 1 40 six 10 10 10 10
7 1 30 seven 40 40 40 40
8 4 300 eight 30 30 NULL NULL
9 4 100 nine 300 300 300 300
10 4 200 ten 100 100 100 100
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk rows between 1 following and 1 following) as min1,
max(b) over (order by pk rows between 1 following and 1 following) as max1,
min(b) over (partition by a order by pk rows between 1 following and 1 following) as min2,
max(b) over (partition by a order by pk rows between 1 following and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 2 2 2 2
2 0 2 two 3 3 3 3
3 0 3 three 20 20 NULL NULL
4 1 20 four 10 10 10 10
5 1 10 five 40 40 40 40
6 1 40 six 30 30 30 30
7 1 30 seven 300 300 NULL NULL
8 4 300 eight 100 100 100 100
9 4 100 nine 200 200 200 200
10 4 200 ten 200 200 200 200
11 4 200 eleven NULL NULL NULL NULL
# Try a larger offset.
select pk, a, b, c,
min(b) over (order by pk rows between 3 following and 3 following) as min1,
max(b) over (order by pk rows between 3 following and 3 following) as max1,
min(b) over (partition by a order by pk rows between 3 following and 3 following) as min2,
max(b) over (partition by a order by pk rows between 3 following and 3 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 20 20 NULL NULL
2 0 2 two 10 10 NULL NULL
3 0 3 three 40 40 NULL NULL
4 1 20 four 30 30 30 30
5 1 10 five 300 300 NULL NULL
6 1 40 six 100 100 NULL NULL
7 1 30 seven 200 200 NULL NULL
8 4 300 eight 200 200 200 200
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk rows between 3 preceding and 3 preceding) as min1,
max(b) over (order by pk rows between 3 preceding and 3 preceding) as max1,
min(b) over (partition by a order by pk rows between 3 preceding and 3 preceding) as min2,
max(b) over (partition by a order by pk rows between 3 preceding and 3 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four 1 1 NULL NULL
5 1 10 five 2 2 NULL NULL
6 1 40 six 3 3 NULL NULL
7 1 30 seven 20 20 20 20
8 4 300 eight 10 10 NULL NULL
9 4 100 nine 40 40 NULL NULL
10 4 200 ten 30 30 NULL NULL
11 4 200 eleven 300 300 300 300
# 2 row frame.
select pk, a, b, c,
min(b) over (order by pk rows between current row and 1 following) as min1,
max(b) over (order by pk rows between current row and 1 following) as max1,
min(b) over (partition by a order by pk rows between current row and 1 following) as min2,
max(b) over (partition by a order by pk rows between current row and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 2 1 2
2 0 2 two 2 3 2 3
3 0 3 three 3 20 3 3
4 1 20 four 10 20 10 20
5 1 10 five 10 40 10 40
6 1 40 six 30 40 30 40
7 1 30 seven 30 300 30 30
8 4 300 eight 100 300 100 300
9 4 100 nine 100 200 100 200
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk rows between 0 preceding and 1 following) as min1,
max(b) over (order by pk rows between 0 preceding and 1 following) as max1,
min(b) over (partition by a order by pk rows between 0 preceding and 1 following) as min2,
max(b) over (partition by a order by pk rows between 0 preceding and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 2 1 2
2 0 2 two 2 3 2 3
3 0 3 three 3 20 3 3
4 1 20 four 10 20 10 20
5 1 10 five 10 40 10 40
6 1 40 six 30 40 30 40
7 1 30 seven 30 300 30 30
8 4 300 eight 100 300 100 300
9 4 100 nine 100 200 100 200
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk rows between 1 preceding and current row) as min1,
max(b) over (order by pk rows between 1 preceding and current row) as max1,
min(b) over (partition by a order by pk rows between 1 preceding and current row) as min2,
max(b) over (partition by a order by pk rows between 1 preceding and current row) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 1 2 1 2
3 0 3 three 2 3 2 3
4 1 20 four 3 20 20 20
5 1 10 five 10 20 10 20
6 1 40 six 10 40 10 40
7 1 30 seven 30 40 30 40
8 4 300 eight 30 300 300 300
9 4 100 nine 100 300 100 300
10 4 200 ten 100 200 100 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk rows between 1 preceding and 0 preceding) as min1,
max(b) over (order by pk rows between 1 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk rows between 1 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk rows between 1 preceding and 0 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 1 2 1 2
3 0 3 three 2 3 2 3
4 1 20 four 3 20 20 20
5 1 10 five 10 20 10 20
6 1 40 six 10 40 10 40
7 1 30 seven 30 40 30 40
8 4 300 eight 30 300 300 300
9 4 100 nine 100 300 100 300
10 4 200 ten 100 200 100 200
11 4 200 eleven 200 200 200 200
# Try a larger frame/offset.
select pk, a, b, c,
min(b) over (order by pk rows between current row and 3 following) as min1,
max(b) over (order by pk rows between current row and 3 following) as max1,
min(b) over (partition by a order by pk rows between current row and 3 following) as min2,
max(b) over (partition by a order by pk rows between current row and 3 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 20 1 3
2 0 2 two 2 20 2 3
3 0 3 three 3 40 3 3
4 1 20 four 10 40 10 40
5 1 10 five 10 300 10 40
6 1 40 six 30 300 30 40
7 1 30 seven 30 300 30 30
8 4 300 eight 100 300 100 300
9 4 100 nine 100 200 100 200
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk rows between 2 preceding and 1 following) as min1,
max(b) over (order by pk rows between 2 preceding and 1 following) as max1,
min(b) over (partition by a order by pk rows between 2 preceding and 1 following) as min2,
max(b) over (partition by a order by pk rows between 2 preceding and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 2 1 2
2 0 2 two 1 3 1 3
3 0 3 three 1 20 1 3
4 1 20 four 2 20 10 20
5 1 10 five 3 40 10 40
6 1 40 six 10 40 10 40
7 1 30 seven 10 300 10 40
8 4 300 eight 30 300 100 300
9 4 100 nine 30 300 100 300
10 4 200 ten 100 300 100 300
11 4 200 eleven 100 200 100 200
select pk, a, b, c,
min(b) over (order by pk rows between 3 preceding and current row) as min1,
max(b) over (order by pk rows between 3 preceding and current row) as max1,
min(b) over (partition by a order by pk rows between 3 preceding and current row) as min2,
max(b) over (partition by a order by pk rows between 3 preceding and current row) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 1 2 1 2
3 0 3 three 1 3 1 3
4 1 20 four 1 20 20 20
5 1 10 five 2 20 10 20
6 1 40 six 3 40 10 40
7 1 30 seven 10 40 10 40
8 4 300 eight 10 300 300 300
9 4 100 nine 30 300 100 300
10 4 200 ten 30 300 100 300
11 4 200 eleven 100 300 100 300
select pk, a, b, c,
min(b) over (order by pk rows between 3 preceding and 0 preceding) as min1,
max(b) over (order by pk rows between 3 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk rows between 3 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk rows between 3 preceding and 0 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 1 2 1 2
3 0 3 three 1 3 1 3
4 1 20 four 1 20 20 20
5 1 10 five 2 20 10 20
6 1 40 six 3 40 10 40
7 1 30 seven 10 40 10 40
8 4 300 eight 10 300 300 300
9 4 100 nine 30 300 100 300
10 4 200 ten 30 300 100 300
11 4 200 eleven 100 300 100 300
# Check range frame bounds
select pk, a, b, c,
min(b) over (order by pk range between current row and current row) as min1,
max(b) over (order by pk range between current row and current row) as max1,
min(b) over (partition by a order by pk range between current row and current row) as min2,
max(b) over (partition by a order by pk range between current row and current row) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 2 2 2 2
3 0 3 three 3 3 3 3
4 1 20 four 20 20 20 20
5 1 10 five 10 10 10 10
6 1 40 six 40 40 40 40
7 1 30 seven 30 30 30 30
8 4 300 eight 300 300 300 300
9 4 100 nine 100 100 100 100
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk range between 0 preceding and current row) as min1,
max(b) over (order by pk range between 0 preceding and current row) as max1,
min(b) over (partition by a order by pk range between 0 preceding and current row) as min2,
max(b) over (partition by a order by pk range between 0 preceding and current row) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 2 2 2 2
3 0 3 three 3 3 3 3
4 1 20 four 20 20 20 20
5 1 10 five 10 10 10 10
6 1 40 six 40 40 40 40
7 1 30 seven 30 30 30 30
8 4 300 eight 300 300 300 300
9 4 100 nine 100 100 100 100
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk range between 0 preceding and 0 preceding) as min1,
max(b) over (order by pk range between 0 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk range between 0 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk range between 0 preceding and 0 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 2 2 2 2
3 0 3 three 3 3 3 3
4 1 20 four 20 20 20 20
5 1 10 five 10 10 10 10
6 1 40 six 40 40 40 40
7 1 30 seven 30 30 30 30
8 4 300 eight 300 300 300 300
9 4 100 nine 100 100 100 100
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk range between 1 preceding and 1 preceding) as min1,
max(b) over (order by pk range between 1 preceding and 1 preceding) as max1,
min(b) over (partition by a order by pk range between 1 preceding and 1 preceding) as min2,
max(b) over (partition by a order by pk range between 1 preceding and 1 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two 1 1 1 1
3 0 3 three 2 2 2 2
4 1 20 four 3 3 NULL NULL
5 1 10 five 20 20 20 20
6 1 40 six 10 10 10 10
7 1 30 seven 40 40 40 40
8 4 300 eight 30 30 NULL NULL
9 4 100 nine 300 300 300 300
10 4 200 ten 100 100 100 100
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk range between 1 following and 1 following) as min1,
max(b) over (order by pk range between 1 following and 1 following) as max1,
min(b) over (partition by a order by pk range between 1 following and 1 following) as min2,
max(b) over (partition by a order by pk range between 1 following and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 2 2 2 2
2 0 2 two 3 3 3 3
3 0 3 three 20 20 NULL NULL
4 1 20 four 10 10 10 10
5 1 10 five 40 40 40 40
6 1 40 six 30 30 30 30
7 1 30 seven 300 300 NULL NULL
8 4 300 eight 100 100 100 100
9 4 100 nine 200 200 200 200
10 4 200 ten 200 200 200 200
11 4 200 eleven NULL NULL NULL NULL
# Try a larger offset.
select pk, a, b, c,
min(b) over (order by pk range between 3 following and 3 following) as min1,
max(b) over (order by pk range between 3 following and 3 following) as max1,
min(b) over (partition by a order by pk range between 3 following and 3 following) as min2,
max(b) over (partition by a order by pk range between 3 following and 3 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 20 20 NULL NULL
2 0 2 two 10 10 NULL NULL
3 0 3 three 40 40 NULL NULL
4 1 20 four 30 30 30 30
5 1 10 five 300 300 NULL NULL
6 1 40 six 100 100 NULL NULL
7 1 30 seven 200 200 NULL NULL
8 4 300 eight 200 200 200 200
9 4 100 nine NULL NULL NULL NULL
10 4 200 ten NULL NULL NULL NULL
11 4 200 eleven NULL NULL NULL NULL
select pk, a, b, c,
min(b) over (order by pk range between 3 preceding and 3 preceding) as min1,
max(b) over (order by pk range between 3 preceding and 3 preceding) as max1,
min(b) over (partition by a order by pk range between 3 preceding and 3 preceding) as min2,
max(b) over (partition by a order by pk range between 3 preceding and 3 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one NULL NULL NULL NULL
2 0 2 two NULL NULL NULL NULL
3 0 3 three NULL NULL NULL NULL
4 1 20 four 1 1 NULL NULL
5 1 10 five 2 2 NULL NULL
6 1 40 six 3 3 NULL NULL
7 1 30 seven 20 20 20 20
8 4 300 eight 10 10 NULL NULL
9 4 100 nine 40 40 NULL NULL
10 4 200 ten 30 30 NULL NULL
11 4 200 eleven 300 300 300 300
# 2 row frame.
select pk, a, b, c,
min(b) over (order by pk range between current row and 1 following) as min1,
max(b) over (order by pk range between current row and 1 following) as max1,
min(b) over (partition by a order by pk range between current row and 1 following) as min2,
max(b) over (partition by a order by pk range between current row and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 2 1 2
2 0 2 two 2 3 2 3
3 0 3 three 3 20 3 3
4 1 20 four 10 20 10 20
5 1 10 five 10 40 10 40
6 1 40 six 30 40 30 40
7 1 30 seven 30 300 30 30
8 4 300 eight 100 300 100 300
9 4 100 nine 100 200 100 200
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk range between 0 preceding and 1 following) as min1,
max(b) over (order by pk range between 0 preceding and 1 following) as max1,
min(b) over (partition by a order by pk range between 0 preceding and 1 following) as min2,
max(b) over (partition by a order by pk range between 0 preceding and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 2 1 2
2 0 2 two 2 3 2 3
3 0 3 three 3 20 3 3
4 1 20 four 10 20 10 20
5 1 10 five 10 40 10 40
6 1 40 six 30 40 30 40
7 1 30 seven 30 300 30 30
8 4 300 eight 100 300 100 300
9 4 100 nine 100 200 100 200
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk range between 1 preceding and current row) as min1,
max(b) over (order by pk range between 1 preceding and current row) as max1,
min(b) over (partition by a order by pk range between 1 preceding and current row) as min2,
max(b) over (partition by a order by pk range between 1 preceding and current row) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 1 2 1 2
3 0 3 three 2 3 2 3
4 1 20 four 3 20 20 20
5 1 10 five 10 20 10 20
6 1 40 six 10 40 10 40
7 1 30 seven 30 40 30 40
8 4 300 eight 30 300 300 300
9 4 100 nine 100 300 100 300
10 4 200 ten 100 200 100 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk range between 1 preceding and 0 preceding) as min1,
max(b) over (order by pk range between 1 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk range between 1 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk range between 1 preceding and 0 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 1 2 1 2
3 0 3 three 2 3 2 3
4 1 20 four 3 20 20 20
5 1 10 five 10 20 10 20
6 1 40 six 10 40 10 40
7 1 30 seven 30 40 30 40
8 4 300 eight 30 300 300 300
9 4 100 nine 100 300 100 300
10 4 200 ten 100 200 100 200
11 4 200 eleven 200 200 200 200
# Try a larger frame/offset.
select pk, a, b, c,
min(b) over (order by pk range between current row and 3 following) as min1,
max(b) over (order by pk range between current row and 3 following) as max1,
min(b) over (partition by a order by pk range between current row and 3 following) as min2,
max(b) over (partition by a order by pk range between current row and 3 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 20 1 3
2 0 2 two 2 20 2 3
3 0 3 three 3 40 3 3
4 1 20 four 10 40 10 40
5 1 10 five 10 300 10 40
6 1 40 six 30 300 30 40
7 1 30 seven 30 300 30 30
8 4 300 eight 100 300 100 300
9 4 100 nine 100 200 100 200
10 4 200 ten 200 200 200 200
11 4 200 eleven 200 200 200 200
select pk, a, b, c,
min(b) over (order by pk range between 2 preceding and 1 following) as min1,
max(b) over (order by pk range between 2 preceding and 1 following) as max1,
min(b) over (partition by a order by pk range between 2 preceding and 1 following) as min2,
max(b) over (partition by a order by pk range between 2 preceding and 1 following) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 2 1 2
2 0 2 two 1 3 1 3
3 0 3 three 1 20 1 3
4 1 20 four 2 20 10 20
5 1 10 five 3 40 10 40
6 1 40 six 10 40 10 40
7 1 30 seven 10 300 10 40
8 4 300 eight 30 300 100 300
9 4 100 nine 30 300 100 300
10 4 200 ten 100 300 100 300
11 4 200 eleven 100 200 100 200
select pk, a, b, c,
min(b) over (order by pk range between 3 preceding and current row) as min1,
max(b) over (order by pk range between 3 preceding and current row) as max1,
min(b) over (partition by a order by pk range between 3 preceding and current row) as min2,
max(b) over (partition by a order by pk range between 3 preceding and current row) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 1 2 1 2
3 0 3 three 1 3 1 3
4 1 20 four 1 20 20 20
5 1 10 five 2 20 10 20
6 1 40 six 3 40 10 40
7 1 30 seven 10 40 10 40
8 4 300 eight 10 300 300 300
9 4 100 nine 30 300 100 300
10 4 200 ten 30 300 100 300
11 4 200 eleven 100 300 100 300
select pk, a, b, c,
min(b) over (order by pk range between 3 preceding and 0 preceding) as min1,
max(b) over (order by pk range between 3 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk range between 3 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk range between 3 preceding and 0 preceding) as max2
from t2;
pk a b c min1 max1 min2 max2
1 0 1 one 1 1 1 1
2 0 2 two 1 2 1 2
3 0 3 three 1 3 1 3
4 1 20 four 1 20 20 20
5 1 10 five 2 20 10 20
6 1 40 six 3 40 10 40
7 1 30 seven 10 40 10 40
8 4 300 eight 10 300 300 300
9 4 100 nine 30 300 100 300
10 4 200 ten 30 300 100 300
11 4 200 eleven 100 300 100 300
drop table t2;
drop table t1; drop table t1;
mysql-test/t/win_min_max.test
View file @ 1c724413
...@@ -46,4 +46,325 @@ select pk, a, c, min(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDIN ...@@ -46,4 +46,325 @@ select pk, a, c, min(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDIN
max(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as max max(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as max
from t1; from t1;
create table t2 (
pk int primary key,
a int,
b int,
c char(10)
);
insert into t2 values
( 1, 0, 1, 'one'),
( 2, 0, 2, 'two'),
( 3, 0, 3, 'three'),
( 4, 1, 20, 'four'),
( 5, 1, 10, 'five'),
( 6, 1, 40, 'six'),
( 7, 1, 30, 'seven'),
( 8, 4,300, 'eight'),
( 9, 4,100, 'nine'),
(10, 4,200, 'ten'),
(11, 4,200, 'eleven');
--echo # First try some invalid argument queries.
select pk, a, b, c,
min(c) over (order by pk),
max(c) over (order by pk),
min(c) over (partition by a order by pk),
max(c) over (partition by a order by pk)
from t2;
--echo # Empty frame
select pk, a, b, c,
min(b) over (order by pk rows between 2 following and 1 following) as min1,
max(b) over (order by pk rows between 2 following and 1 following) as max1,
min(b) over (partition by a order by pk rows between 2 following and 1 following) as min2,
max(b) over (partition by a order by pk rows between 2 following and 1 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 2 following and 1 following) as min1,
max(b) over (order by pk range between 2 following and 1 following) as max1,
min(b) over (partition by a order by pk range between 2 following and 1 following) as min2,
max(b) over (partition by a order by pk range between 2 following and 1 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 1 preceding and 2 preceding) as min1,
max(b) over (order by pk rows between 1 preceding and 2 preceding) as max1,
min(b) over (partition by a order by pk rows between 1 preceding and 2 preceding) as min2,
max(b) over (partition by a order by pk rows between 1 preceding and 2 preceding) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 1 preceding and 2 preceding) as min1,
max(b) over (order by pk range between 1 preceding and 2 preceding) as max1,
min(b) over (partition by a order by pk range between 1 preceding and 2 preceding) as min2,
max(b) over (partition by a order by pk range between 1 preceding and 2 preceding) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 1 following and 0 following) as min1,
max(b) over (order by pk rows between 1 following and 0 following) as max1,
min(b) over (partition by a order by pk rows between 1 following and 0 following) as min2,
max(b) over (partition by a order by pk rows between 1 following and 0 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 1 following and 0 following) as min1,
max(b) over (order by pk range between 1 following and 0 following) as max1,
min(b) over (partition by a order by pk range between 1 following and 0 following) as min2,
max(b) over (partition by a order by pk range between 1 following and 0 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 1 following and 0 preceding) as min1,
max(b) over (order by pk rows between 1 following and 0 preceding) as max1,
min(b) over (partition by a order by pk rows between 1 following and 0 preceding) as min2,
max(b) over (partition by a order by pk rows between 1 following and 0 preceding) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 1 following and 0 preceding) as min1,
max(b) over (order by pk range between 1 following and 0 preceding) as max1,
min(b) over (partition by a order by pk range between 1 following and 0 preceding) as min2,
max(b) over (partition by a order by pk range between 1 following and 0 preceding) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 0 following and 1 preceding) as min1,
max(b) over (order by pk rows between 0 following and 1 preceding) as max1,
min(b) over (partition by a order by pk rows between 0 following and 1 preceding) as min2,
max(b) over (partition by a order by pk rows between 0 following and 1 preceding) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 0 following and 1 preceding) as min1,
max(b) over (order by pk range between 0 following and 1 preceding) as max1,
min(b) over (partition by a order by pk range between 0 following and 1 preceding) as min2,
max(b) over (partition by a order by pk range between 0 following and 1 preceding) as max2
from t2;
--echo # 1 row frame.
select pk, a, b, c,
min(b) over (order by pk rows between current row and current row) as min1,
max(b) over (order by pk rows between current row and current row) as max1,
min(b) over (partition by a order by pk rows between current row and current row) as min2,
max(b) over (partition by a order by pk rows between current row and current row) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 0 preceding and current row) as min1,
max(b) over (order by pk rows between 0 preceding and current row) as max1,
min(b) over (partition by a order by pk rows between 0 preceding and current row) as min2,
max(b) over (partition by a order by pk rows between 0 preceding and current row) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 0 preceding and 0 preceding) as min1,
max(b) over (order by pk rows between 0 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk rows between 0 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk rows between 0 preceding and 0 preceding) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 1 preceding and 1 preceding) as min1,
max(b) over (order by pk rows between 1 preceding and 1 preceding) as max1,
min(b) over (partition by a order by pk rows between 1 preceding and 1 preceding) as min2,
max(b) over (partition by a order by pk rows between 1 preceding and 1 preceding) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 1 following and 1 following) as min1,
max(b) over (order by pk rows between 1 following and 1 following) as max1,
min(b) over (partition by a order by pk rows between 1 following and 1 following) as min2,
max(b) over (partition by a order by pk rows between 1 following and 1 following) as max2
from t2;
--echo # Try a larger offset.
select pk, a, b, c,
min(b) over (order by pk rows between 3 following and 3 following) as min1,
max(b) over (order by pk rows between 3 following and 3 following) as max1,
min(b) over (partition by a order by pk rows between 3 following and 3 following) as min2,
max(b) over (partition by a order by pk rows between 3 following and 3 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 3 preceding and 3 preceding) as min1,
max(b) over (order by pk rows between 3 preceding and 3 preceding) as max1,
min(b) over (partition by a order by pk rows between 3 preceding and 3 preceding) as min2,
max(b) over (partition by a order by pk rows between 3 preceding and 3 preceding) as max2
from t2;
--echo # 2 row frame.
select pk, a, b, c,
min(b) over (order by pk rows between current row and 1 following) as min1,
max(b) over (order by pk rows between current row and 1 following) as max1,
min(b) over (partition by a order by pk rows between current row and 1 following) as min2,
max(b) over (partition by a order by pk rows between current row and 1 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 0 preceding and 1 following) as min1,
max(b) over (order by pk rows between 0 preceding and 1 following) as max1,
min(b) over (partition by a order by pk rows between 0 preceding and 1 following) as min2,
max(b) over (partition by a order by pk rows between 0 preceding and 1 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 1 preceding and current row) as min1,
max(b) over (order by pk rows between 1 preceding and current row) as max1,
min(b) over (partition by a order by pk rows between 1 preceding and current row) as min2,
max(b) over (partition by a order by pk rows between 1 preceding and current row) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 1 preceding and 0 preceding) as min1,
max(b) over (order by pk rows between 1 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk rows between 1 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk rows between 1 preceding and 0 preceding) as max2
from t2;
--echo # Try a larger frame/offset.
select pk, a, b, c,
min(b) over (order by pk rows between current row and 3 following) as min1,
max(b) over (order by pk rows between current row and 3 following) as max1,
min(b) over (partition by a order by pk rows between current row and 3 following) as min2,
max(b) over (partition by a order by pk rows between current row and 3 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 2 preceding and 1 following) as min1,
max(b) over (order by pk rows between 2 preceding and 1 following) as max1,
min(b) over (partition by a order by pk rows between 2 preceding and 1 following) as min2,
max(b) over (partition by a order by pk rows between 2 preceding and 1 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 3 preceding and current row) as min1,
max(b) over (order by pk rows between 3 preceding and current row) as max1,
min(b) over (partition by a order by pk rows between 3 preceding and current row) as min2,
max(b) over (partition by a order by pk rows between 3 preceding and current row) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk rows between 3 preceding and 0 preceding) as min1,
max(b) over (order by pk rows between 3 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk rows between 3 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk rows between 3 preceding and 0 preceding) as max2
from t2;
--echo # Check range frame bounds
select pk, a, b, c,
min(b) over (order by pk range between current row and current row) as min1,
max(b) over (order by pk range between current row and current row) as max1,
min(b) over (partition by a order by pk range between current row and current row) as min2,
max(b) over (partition by a order by pk range between current row and current row) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 0 preceding and current row) as min1,
max(b) over (order by pk range between 0 preceding and current row) as max1,
min(b) over (partition by a order by pk range between 0 preceding and current row) as min2,
max(b) over (partition by a order by pk range between 0 preceding and current row) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 0 preceding and 0 preceding) as min1,
max(b) over (order by pk range between 0 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk range between 0 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk range between 0 preceding and 0 preceding) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 1 preceding and 1 preceding) as min1,
max(b) over (order by pk range between 1 preceding and 1 preceding) as max1,
min(b) over (partition by a order by pk range between 1 preceding and 1 preceding) as min2,
max(b) over (partition by a order by pk range between 1 preceding and 1 preceding) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 1 following and 1 following) as min1,
max(b) over (order by pk range between 1 following and 1 following) as max1,
min(b) over (partition by a order by pk range between 1 following and 1 following) as min2,
max(b) over (partition by a order by pk range between 1 following and 1 following) as max2
from t2;
--echo # Try a larger offset.
select pk, a, b, c,
min(b) over (order by pk range between 3 following and 3 following) as min1,
max(b) over (order by pk range between 3 following and 3 following) as max1,
min(b) over (partition by a order by pk range between 3 following and 3 following) as min2,
max(b) over (partition by a order by pk range between 3 following and 3 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 3 preceding and 3 preceding) as min1,
max(b) over (order by pk range between 3 preceding and 3 preceding) as max1,
min(b) over (partition by a order by pk range between 3 preceding and 3 preceding) as min2,
max(b) over (partition by a order by pk range between 3 preceding and 3 preceding) as max2
from t2;
--echo # 2 row frame.
select pk, a, b, c,
min(b) over (order by pk range between current row and 1 following) as min1,
max(b) over (order by pk range between current row and 1 following) as max1,
min(b) over (partition by a order by pk range between current row and 1 following) as min2,
max(b) over (partition by a order by pk range between current row and 1 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 0 preceding and 1 following) as min1,
max(b) over (order by pk range between 0 preceding and 1 following) as max1,
min(b) over (partition by a order by pk range between 0 preceding and 1 following) as min2,
max(b) over (partition by a order by pk range between 0 preceding and 1 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 1 preceding and current row) as min1,
max(b) over (order by pk range between 1 preceding and current row) as max1,
min(b) over (partition by a order by pk range between 1 preceding and current row) as min2,
max(b) over (partition by a order by pk range between 1 preceding and current row) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 1 preceding and 0 preceding) as min1,
max(b) over (order by pk range between 1 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk range between 1 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk range between 1 preceding and 0 preceding) as max2
from t2;
--echo # Try a larger frame/offset.
select pk, a, b, c,
min(b) over (order by pk range between current row and 3 following) as min1,
max(b) over (order by pk range between current row and 3 following) as max1,
min(b) over (partition by a order by pk range between current row and 3 following) as min2,
max(b) over (partition by a order by pk range between current row and 3 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 2 preceding and 1 following) as min1,
max(b) over (order by pk range between 2 preceding and 1 following) as max1,
min(b) over (partition by a order by pk range between 2 preceding and 1 following) as min2,
max(b) over (partition by a order by pk range between 2 preceding and 1 following) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 3 preceding and current row) as min1,
max(b) over (order by pk range between 3 preceding and current row) as max1,
min(b) over (partition by a order by pk range between 3 preceding and current row) as min2,
max(b) over (partition by a order by pk range between 3 preceding and current row) as max2
from t2;
select pk, a, b, c,
min(b) over (order by pk range between 3 preceding and 0 preceding) as min1,
max(b) over (order by pk range between 3 preceding and 0 preceding) as max1,
min(b) over (partition by a order by pk range between 3 preceding and 0 preceding) as min2,
max(b) over (partition by a order by pk range between 3 preceding and 0 preceding) as max2
from t2;
drop table t2;
drop table t1; drop table t1;
sql/sql_window.cc
View file @ 1c724413
...@@ -1688,7 +1688,6 @@ class Frame_n_rows_following : public Frame_cursor ...@@ -1688,7 +1688,6 @@ class Frame_n_rows_following : public Frame_cursor
is_top_bound(is_top_bound_arg), n_rows(n_rows_arg), is_top_bound(is_top_bound_arg), n_rows(n_rows_arg),
cursor(thd, partition_list) cursor(thd, partition_list)
{ {
DBUG_ASSERT(n_rows > 0);
} }
void init(READ_RECORD *info) void init(READ_RECORD *info)
......
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