1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
create table t1 (
pk int primary key,
a int,
b int
);
create table t2 (
pk int primary key,
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);
insert into t2 values
( 1 , 0, 2),
( 2 , 0, 2),
( 3 , 1, 4),
( 4 , 1, 4),
( 5 , 2, 16),
( 6 , 2, 64),
( 7 , 2, 128),
( 8 , 2, 16);
# Test bit functions on only one partition.
select pk, a, b,
bit_or(b) over (order by pk) as bit_or,
bit_and(b) over (order by pk) as bit_and,
bit_xor(b) over (order by pk) as bit_xor
from t1;
pk a b bit_or bit_and bit_xor
1 0 1 1 1 1
2 0 2 3 0 3
3 1 4 7 0 7
4 1 8 15 0 15
5 2 32 47 0 47
6 2 64 111 0 111
7 2 128 239 0 239
8 2 16 255 0 255
select pk, a, b,
bit_or(b) over (order by pk) as bit_or,
bit_and(b) over (order by pk) as bit_and,
bit_xor(b) over (order by pk) as bit_xor
from t2;
pk a b bit_or bit_and bit_xor
1 0 2 2 2 2
2 0 2 2 2 0
3 1 4 6 0 4
4 1 4 6 0 0
5 2 16 22 0 16
6 2 64 86 0 80
7 2 128 214 0 208
8 2 16 214 0 192
# Test multiple partitions with bit functions.
select pk, a, b,
bit_or(b) over (partition by a order by pk) as bit_or,
bit_and(b) over (partition by a order by pk) as bit_and,
bit_xor(b) over (partition by a order by pk) as bit_xor
from t1;
pk a b bit_or bit_and bit_xor
1 0 1 1 1 1
2 0 2 3 0 3
3 1 4 4 4 4
4 1 8 12 0 12
5 2 32 32 32 32
6 2 64 96 0 96
7 2 128 224 0 224
8 2 16 240 0 240
select pk, a, b,
bit_or(b) over (partition by a order by pk) as bit_or,
bit_and(b) over (partition by a order by pk) as bit_and,
bit_xor(b) over (partition by a order by pk) as bit_xor
from t2;
pk a b bit_or bit_and bit_xor
1 0 2 2 2 2
2 0 2 2 2 0
3 1 4 4 4 4
4 1 4 4 4 0
5 2 16 16 16 16
6 2 64 80 0 80
7 2 128 208 0 208
8 2 16 208 0 192
# Test remove function for bit functions using a sliding window.
select pk, a, b,
bit_or(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as bit_or,
bit_and(b) over (partition by a order by pk) as bit_and,
bit_xor(b) over (partition by a order by pk) as bit_xor
from t1;
pk a b bit_or bit_and bit_xor
1 0 1 3 1 1
2 0 2 3 0 3
3 1 4 12 4 4
4 1 8 12 0 12
5 2 32 96 32 32
6 2 64 224 0 96
7 2 128 208 0 224
8 2 16 144 0 240
select pk, a, b,
bit_or(b) over (partition by a order by pk) as bit_or,
bit_and(b) over (partition by a order by pk) as bit_and,
bit_xor(b) over (partition by a order by pk) as bit_xor
from t2;
pk a b bit_or bit_and bit_xor
1 0 2 2 2 2
2 0 2 2 2 0
3 1 4 4 4 4
4 1 4 4 4 0
5 2 16 16 16 16
6 2 64 80 0 80
7 2 128 208 0 208
8 2 16 208 0 192
drop table t1;
drop table t2;
|
