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|
--
-- INTERVAL
--
SET DATESTYLE = 'ISO';
-- check acceptance of "time zone style"
SELECT INTERVAL '01:00' AS "One hour";
One hour
----------
01:00:00
(1 row)
SELECT INTERVAL '+02:00' AS "Two hours";
Two hours
-----------
02:00:00
(1 row)
SELECT INTERVAL '-08:00' AS "Eight hours";
Eight hours
-------------
-08:00:00
(1 row)
SELECT INTERVAL '-05' AS "Five hours";
Five hours
------------
-05:00:00
(1 row)
SELECT INTERVAL '-1 +02:03' AS "22 hours ago...";
22 hours ago...
-----------------
-21:57:00
(1 row)
SELECT INTERVAL '-1 days +02:03' AS "22 hours ago...";
22 hours ago...
-----------------
-21:57:00
(1 row)
SELECT INTERVAL '10 years -11 month -12 days +13:14' AS "9 years...";
9 years...
----------------------------------
9 years 1 mon -11 days -10:46:00
(1 row)
CREATE TABLE INTERVAL_TBL (f1 interval);
INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 1 minute');
INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 5 hour');
INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 10 day');
INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 34 year');
INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 3 months');
INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 14 seconds ago');
INSERT INTO INTERVAL_TBL (f1) VALUES ('1 day 2 hours 3 minutes 4 seconds');
INSERT INTO INTERVAL_TBL (f1) VALUES ('6 years');
INSERT INTO INTERVAL_TBL (f1) VALUES ('5 months');
INSERT INTO INTERVAL_TBL (f1) VALUES ('5 months 12 hours');
-- badly formatted interval
INSERT INTO INTERVAL_TBL (f1) VALUES ('badly formatted interval');
ERROR: Bad interval external representation 'badly formatted interval'
INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 30 eons ago');
ERROR: Bad interval external representation '@ 30 eons ago'
-- test interval operators
SELECT '' AS ten, INTERVAL_TBL.*;
ten | f1
-----+-----------------
| 00:01:00
| 05:00:00
| 10 days
| 34 years
| 3 mons
| -00:00:14
| 1 day 02:03:04
| 6 years
| 5 mons
| 5 mons 12:00:00
(10 rows)
SELECT '' AS nine, INTERVAL_TBL.*
WHERE INTERVAL_TBL.f1 <> interval '@ 10 days';
nine | f1
------+-----------------
| 00:01:00
| 05:00:00
| 34 years
| 3 mons
| -00:00:14
| 1 day 02:03:04
| 6 years
| 5 mons
| 5 mons 12:00:00
(9 rows)
SELECT '' AS three, INTERVAL_TBL.*
WHERE INTERVAL_TBL.f1 <= interval '@ 5 hours';
three | f1
-------+-----------
| 00:01:00
| 05:00:00
| -00:00:14
(3 rows)
SELECT '' AS three, INTERVAL_TBL.*
WHERE INTERVAL_TBL.f1 < interval '@ 1 day';
three | f1
-------+-----------
| 00:01:00
| 05:00:00
| -00:00:14
(3 rows)
SELECT '' AS one, INTERVAL_TBL.*
WHERE INTERVAL_TBL.f1 = interval '@ 34 years';
one | f1
-----+----------
| 34 years
(1 row)
SELECT '' AS five, INTERVAL_TBL.*
WHERE INTERVAL_TBL.f1 >= interval '@ 1 month';
five | f1
------+-----------------
| 34 years
| 3 mons
| 6 years
| 5 mons
| 5 mons 12:00:00
(5 rows)
SELECT '' AS nine, INTERVAL_TBL.*
WHERE INTERVAL_TBL.f1 > interval '@ 3 seconds ago';
nine | f1
------+-----------------
| 00:01:00
| 05:00:00
| 10 days
| 34 years
| 3 mons
| 1 day 02:03:04
| 6 years
| 5 mons
| 5 mons 12:00:00
(9 rows)
SELECT '' AS fortyfive, r1.*, r2.*
FROM INTERVAL_TBL r1, INTERVAL_TBL r2
WHERE r1.f1 > r2.f1
ORDER BY r1.f1, r2.f1;
fortyfive | f1 | f1
-----------+-----------------+-----------------
| 00:01:00 | -00:00:14
| 05:00:00 | -00:00:14
| 05:00:00 | 00:01:00
| 1 day 02:03:04 | -00:00:14
| 1 day 02:03:04 | 00:01:00
| 1 day 02:03:04 | 05:00:00
| 10 days | -00:00:14
| 10 days | 00:01:00
| 10 days | 05:00:00
| 10 days | 1 day 02:03:04
| 3 mons | -00:00:14
| 3 mons | 00:01:00
| 3 mons | 05:00:00
| 3 mons | 1 day 02:03:04
| 3 mons | 10 days
| 5 mons | -00:00:14
| 5 mons | 00:01:00
| 5 mons | 05:00:00
| 5 mons | 1 day 02:03:04
| 5 mons | 10 days
| 5 mons | 3 mons
| 5 mons 12:00:00 | -00:00:14
| 5 mons 12:00:00 | 00:01:00
| 5 mons 12:00:00 | 05:00:00
| 5 mons 12:00:00 | 1 day 02:03:04
| 5 mons 12:00:00 | 10 days
| 5 mons 12:00:00 | 3 mons
| 5 mons 12:00:00 | 5 mons
| 6 years | -00:00:14
| 6 years | 00:01:00
| 6 years | 05:00:00
| 6 years | 1 day 02:03:04
| 6 years | 10 days
| 6 years | 3 mons
| 6 years | 5 mons
| 6 years | 5 mons 12:00:00
| 34 years | -00:00:14
| 34 years | 00:01:00
| 34 years | 05:00:00
| 34 years | 1 day 02:03:04
| 34 years | 10 days
| 34 years | 3 mons
| 34 years | 5 mons
| 34 years | 5 mons 12:00:00
| 34 years | 6 years
(45 rows)
SET DATESTYLE = 'postgres';
SELECT '' AS ten, INTERVAL_TBL.*;
ten | f1
-----+-------------------------------
| @ 1 min
| @ 5 hours
| @ 10 days
| @ 34 years
| @ 3 mons
| @ 14 secs ago
| @ 1 day 2 hours 3 mins 4 secs
| @ 6 years
| @ 5 mons
| @ 5 mons 12 hours
(10 rows)
-- test avg(interval), which is somewhat fragile since people have been
-- known to change the allowed input syntax for type interval without
-- updating pg_aggregate.agginitval
select avg(f1) from interval_tbl;
avg
-------------------------------------------------
@ 4 years 1 mon 10 days 4 hours 18 mins 23 secs
(1 row)
|
