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|
-- test comparisons
WITH
v(u) AS (VALUES
(NULL),
('-2'::unit),
('-1'::unit),
('-0'::unit),
('0'::unit),
('1'::unit),
('2'::unit),
(meter()),
(meter() * '2'),
(kilogram()),
(kilogram() * '2')
),
va(a) AS (SELECT * FROM v),
vb(b) AS (SELECT * FROM v)
SELECT
a, b,
CASE WHEN unit_cmp(a, b) < 0 THEN '<'
WHEN unit_cmp(a, b) = 0 THEN '='
WHEN unit_cmp(a, b) > 0 THEN '>'
END AS cmp,
a < b AS lt, a <= b AS le,
a = b AS eq, a <> b AS ne,
a >= b AS ge, a > b AS gt
FROM
va CROSS JOIN vb;
a | b | cmp | lt | le | eq | ne | ge | gt
------+------+-----+----+----+----+----+----+----
| | | | | | | |
| -2 | | | | | | |
| -1 | | | | | | |
| -0 | | | | | | |
| 0 | | | | | | |
| 1 | | | | | | |
| 2 | | | | | | |
| 1 m | | | | | | |
| 2 m | | | | | | |
| 1 kg | | | | | | |
| 2 kg | | | | | | |
-2 | | | | | | | |
-2 | -2 | = | f | t | t | f | t | f
-2 | -1 | < | t | t | f | t | f | f
-2 | -0 | < | t | t | f | t | f | f
-2 | 0 | < | t | t | f | t | f | f
-2 | 1 | < | t | t | f | t | f | f
-2 | 2 | < | t | t | f | t | f | f
-2 | 1 m | < | t | t | f | t | f | f
-2 | 2 m | < | t | t | f | t | f | f
-2 | 1 kg | < | t | t | f | t | f | f
-2 | 2 kg | < | t | t | f | t | f | f
-1 | | | | | | | |
-1 | -2 | > | f | f | f | t | t | t
-1 | -1 | = | f | t | t | f | t | f
-1 | -0 | < | t | t | f | t | f | f
-1 | 0 | < | t | t | f | t | f | f
-1 | 1 | < | t | t | f | t | f | f
-1 | 2 | < | t | t | f | t | f | f
-1 | 1 m | < | t | t | f | t | f | f
-1 | 2 m | < | t | t | f | t | f | f
-1 | 1 kg | < | t | t | f | t | f | f
-1 | 2 kg | < | t | t | f | t | f | f
-0 | | | | | | | |
-0 | -2 | > | f | f | f | t | t | t
-0 | -1 | > | f | f | f | t | t | t
-0 | -0 | = | f | t | t | f | t | f
-0 | 0 | = | f | t | t | f | t | f
-0 | 1 | < | t | t | f | t | f | f
-0 | 2 | < | t | t | f | t | f | f
-0 | 1 m | < | t | t | f | t | f | f
-0 | 2 m | < | t | t | f | t | f | f
-0 | 1 kg | < | t | t | f | t | f | f
-0 | 2 kg | < | t | t | f | t | f | f
0 | | | | | | | |
0 | -2 | > | f | f | f | t | t | t
0 | -1 | > | f | f | f | t | t | t
0 | -0 | = | f | t | t | f | t | f
0 | 0 | = | f | t | t | f | t | f
0 | 1 | < | t | t | f | t | f | f
0 | 2 | < | t | t | f | t | f | f
0 | 1 m | < | t | t | f | t | f | f
0 | 2 m | < | t | t | f | t | f | f
0 | 1 kg | < | t | t | f | t | f | f
0 | 2 kg | < | t | t | f | t | f | f
1 | | | | | | | |
1 | -2 | > | f | f | f | t | t | t
1 | -1 | > | f | f | f | t | t | t
1 | -0 | > | f | f | f | t | t | t
1 | 0 | > | f | f | f | t | t | t
1 | 1 | = | f | t | t | f | t | f
1 | 2 | < | t | t | f | t | f | f
1 | 1 m | < | t | t | f | t | f | f
1 | 2 m | < | t | t | f | t | f | f
1 | 1 kg | < | t | t | f | t | f | f
1 | 2 kg | < | t | t | f | t | f | f
2 | | | | | | | |
2 | -2 | > | f | f | f | t | t | t
2 | -1 | > | f | f | f | t | t | t
2 | -0 | > | f | f | f | t | t | t
2 | 0 | > | f | f | f | t | t | t
2 | 1 | > | f | f | f | t | t | t
2 | 2 | = | f | t | t | f | t | f
2 | 1 m | > | f | f | f | t | t | t
2 | 2 m | < | t | t | f | t | f | f
2 | 1 kg | > | f | f | f | t | t | t
2 | 2 kg | < | t | t | f | t | f | f
1 m | | | | | | | |
1 m | -2 | > | f | f | f | t | t | t
1 m | -1 | > | f | f | f | t | t | t
1 m | -0 | > | f | f | f | t | t | t
1 m | 0 | > | f | f | f | t | t | t
1 m | 1 | > | f | f | f | t | t | t
1 m | 2 | < | t | t | f | t | f | f
1 m | 1 m | = | f | t | t | f | t | f
1 m | 2 m | < | t | t | f | t | f | f
1 m | 1 kg | > | f | f | f | t | t | t
1 m | 2 kg | < | t | t | f | t | f | f
2 m | | | | | | | |
2 m | -2 | > | f | f | f | t | t | t
2 m | -1 | > | f | f | f | t | t | t
2 m | -0 | > | f | f | f | t | t | t
2 m | 0 | > | f | f | f | t | t | t
2 m | 1 | > | f | f | f | t | t | t
2 m | 2 | > | f | f | f | t | t | t
2 m | 1 m | > | f | f | f | t | t | t
2 m | 2 m | = | f | t | t | f | t | f
2 m | 1 kg | > | f | f | f | t | t | t
2 m | 2 kg | > | f | f | f | t | t | t
1 kg | | | | | | | |
1 kg | -2 | > | f | f | f | t | t | t
1 kg | -1 | > | f | f | f | t | t | t
1 kg | -0 | > | f | f | f | t | t | t
1 kg | 0 | > | f | f | f | t | t | t
1 kg | 1 | > | f | f | f | t | t | t
1 kg | 2 | < | t | t | f | t | f | f
1 kg | 1 m | < | t | t | f | t | f | f
1 kg | 2 m | < | t | t | f | t | f | f
1 kg | 1 kg | = | f | t | t | f | t | f
1 kg | 2 kg | < | t | t | f | t | f | f
2 kg | | | | | | | |
2 kg | -2 | > | f | f | f | t | t | t
2 kg | -1 | > | f | f | f | t | t | t
2 kg | -0 | > | f | f | f | t | t | t
2 kg | 0 | > | f | f | f | t | t | t
2 kg | 1 | > | f | f | f | t | t | t
2 kg | 2 | > | f | f | f | t | t | t
2 kg | 1 m | > | f | f | f | t | t | t
2 kg | 2 m | < | t | t | f | t | f | f
2 kg | 1 kg | > | f | f | f | t | t | t
2 kg | 2 kg | = | f | t | t | f | t | f
(121 rows)
-- test btree index
CREATE TEMP TABLE u (u unit);
INSERT INTO u SELECT meter(generate_series(1,10000)::double precision);
INSERT INTO u SELECT generate_series(1,10000)::text::unit * kilogram();
ANALYZE u;
CREATE INDEX ON u(u);
SELECT * FROM u WHERE u = meter(400);
u
-------
400 m
(1 row)
SELECT * FROM u WHERE u = '300' * kilogram();
u
--------
300 kg
(1 row)
EXPLAIN (COSTS OFF) SELECT * FROM u WHERE u = meter(400);
QUERY PLAN
------------------------------------
Index Only Scan using u_u_idx on u
Index Cond: (u = '400 m'::unit)
(2 rows)
EXPLAIN (COSTS OFF) SELECT * FROM u WHERE u = '300' * kilogram();
QUERY PLAN
------------------------------------
Index Only Scan using u_u_idx on u
Index Cond: (u = '300 kg'::unit)
(2 rows)
-- test strict operators
SELECT '1 m'::unit << '1 m'::unit;
?column?
----------
f
(1 row)
SELECT '1 m'::unit << '1 A'::unit;
ERROR: dimension mismatch in "strict comparison" operation: "1 m", "1 A"
SELECT '1 m'::unit <<= '1 m'::unit;
?column?
----------
t
(1 row)
SELECT '1 m'::unit <<= '1 A'::unit;
ERROR: dimension mismatch in "strict comparison" operation: "1 m", "1 A"
SELECT '1 m'::unit == '1 m'::unit;
?column?
----------
t
(1 row)
SELECT '1 m'::unit == '1 A'::unit;
ERROR: dimension mismatch in "strict comparison" operation: "1 m", "1 A"
SELECT '1 m'::unit <<>> '1 m'::unit;
?column?
----------
f
(1 row)
SELECT '1 m'::unit <<>> '1 A'::unit;
ERROR: dimension mismatch in "strict comparison" operation: "1 m", "1 A"
SELECT '1 m'::unit >>= '1 m'::unit;
?column?
----------
t
(1 row)
SELECT '1 m'::unit >>= '1 A'::unit;
ERROR: dimension mismatch in "strict comparison" operation: "1 m", "1 A"
SELECT '1 m'::unit >> '1 m'::unit;
?column?
----------
f
(1 row)
SELECT '1 m'::unit >> '1 A'::unit;
ERROR: dimension mismatch in "strict comparison" operation: "1 m", "1 A"
-- test range type
SELECT 'empty'::unitrange;
unitrange
-----------
empty
(1 row)
SELECT '(1 m, 2 m)'::unitrange;
unitrange
---------------
("1 m","2 m")
(1 row)
SELECT '(1 m, 2 A)'::unitrange;
ERROR: dimension mismatch in "strict comparison" operation: "1 m", "2 A"
LINE 1: SELECT '(1 m, 2 A)'::unitrange;
^
SELECT unit_diff('1 A', '2 A');
unit_diff
-----------
-1
(1 row)
SELECT unit_diff('1 A', '2 K');
ERROR: dimension mismatch in "-" operation: "1 A", "2 K"
|
