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
|
set enable_seqscan=off;
CREATE TABLE test_money (
i money
);
INSERT INTO test_money VALUES ('-2'),('-1'),('0'),('1'),('2'),('3');
CREATE INDEX idx_money ON test_money USING rum (i);
SELECT * FROM test_money WHERE i<'1'::money ORDER BY i;
i
--------
-$2.00
-$1.00
$0.00
(3 rows)
SELECT * FROM test_money WHERE i<='1'::money ORDER BY i;
i
--------
-$2.00
-$1.00
$0.00
$1.00
(4 rows)
SELECT * FROM test_money WHERE i='1'::money ORDER BY i;
i
-------
$1.00
(1 row)
SELECT * FROM test_money WHERE i>='1'::money ORDER BY i;
i
-------
$1.00
$2.00
$3.00
(3 rows)
SELECT * FROM test_money WHERE i>'1'::money ORDER BY i;
i
-------
$2.00
$3.00
(2 rows)
EXPLAIN (costs off)
SELECT *, i <=> 0::money FROM test_money ORDER BY i <=> 0::money;
QUERY PLAN
------------------------------------------
Index Scan using idx_money on test_money
Order By: (i <=> (0)::money)
(2 rows)
SELECT *, i <=> 0::money FROM test_money ORDER BY i <=> 0::money;
i | ?column?
--------+----------
$0.00 | 0
-$1.00 | 100
$1.00 | 100
-$2.00 | 200
$2.00 | 200
$3.00 | 300
(6 rows)
EXPLAIN (costs off)
SELECT *, i <=> 1::money FROM test_money WHERE i<1::money ORDER BY i <=> 1::money;
QUERY PLAN
------------------------------------------
Index Scan using idx_money on test_money
Index Cond: (i < (1)::money)
Order By: (i <=> (1)::money)
(3 rows)
SELECT *, i <=> 1::money FROM test_money WHERE i<1::money ORDER BY i <=> 1::money;
i | ?column?
--------+----------
$0.00 | 100
-$1.00 | 200
-$2.00 | 300
(3 rows)
|
