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|
SELECT '1 foobar'::unit;
ERROR: unit "foobar" is not known
LINE 1: SELECT '1 foobar'::unit;
^
SELECT unit_is_hashed('foobar');
unit_is_hashed
----------------
f
(1 row)
INSERT INTO unit_prefixes VALUES ('foo', 42);
SELECT '1 foobar'::unit;
unit
---------
4.2 MPa
(1 row)
SELECT unit_is_hashed('foobar');
unit_is_hashed
----------------
t
(1 row)
SELECT * FROM unit_prefixes WHERE dump;
prefix | factor | definition | dump
--------+--------+------------+------
foo | 42 | | t
(1 row)
INSERT INTO unit_units VALUES ('legobrick', '9.6 mm');
SELECT unit_is_hashed('legobricks');
unit_is_hashed
----------------
f
(1 row)
SELECT '1 m'::unit @ 'legobricks' AS one_meter;
one_meter
-----------------------------
104.166666666667 legobricks
(1 row)
SELECT unit_is_hashed('legobricks');
unit_is_hashed
----------------
t
(1 row)
SELECT * FROM unit_units WHERE dump;
name | unit | shift | definition | dump
-----------+--------+-------+------------+------
legobrick | 9.6 mm | | | t
(1 row)
UPDATE unit_units SET unit = '19.1 mm' WHERE name = 'legobrick'; -- Duplo size
SELECT '2 legobricks'::unit AS old_size;
old_size
----------
19.2 mm
(1 row)
SELECT unit_reset();
unit_reset
------------
(1 row)
SELECT unit_is_hashed('legobricks');
unit_is_hashed
----------------
f
(1 row)
SELECT '2 legobricks'::unit AS new_size;
new_size
----------
38.2 mm
(1 row)
|
