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--
-- INTERVAL
--
SET DATESTYLE = 'ISO';
-- check acceptance of "time zone style"
SELECT INTERVAL '01:00' AS "One hour";
SELECT INTERVAL '+02:00' AS "Two hours";
SELECT INTERVAL '-08:00' AS "Eight hours";
SELECT INTERVAL '-05' AS "Five hours";
SELECT INTERVAL '-1 +02:03' AS "22 hours ago...";
SELECT INTERVAL '-1 days +02:03' AS "22 hours ago...";
SELECT INTERVAL '10 years -11 month -12 days +13:14' AS "9 years...";
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');
INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 30 eons ago');
-- test interval operators
SELECT '' AS ten, * FROM INTERVAL_TBL;
SELECT '' AS nine, * FROM INTERVAL_TBL
WHERE INTERVAL_TBL.f1 <> interval '@ 10 days';
SELECT '' AS three, * FROM INTERVAL_TBL
WHERE INTERVAL_TBL.f1 <= interval '@ 5 hours';
SELECT '' AS three, * FROM INTERVAL_TBL
WHERE INTERVAL_TBL.f1 < interval '@ 1 day';
SELECT '' AS one, * FROM INTERVAL_TBL
WHERE INTERVAL_TBL.f1 = interval '@ 34 years';
SELECT '' AS five, * FROM INTERVAL_TBL
WHERE INTERVAL_TBL.f1 >= interval '@ 1 month';
SELECT '' AS nine, * FROM INTERVAL_TBL
WHERE INTERVAL_TBL.f1 > interval '@ 3 seconds ago';
SELECT '' AS fortyfive, r1.*, r2.*
FROM INTERVAL_TBL r1, INTERVAL_TBL r2
WHERE r1.f1 > r2.f1
ORDER BY r1.f1, r2.f1;
SET DATESTYLE = 'postgres';
SELECT '' AS ten, * FROM INTERVAL_TBL;
-- 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;
-- test long interval input
select '4 millenniums 5 centuries 4 decades 1 year 4 months 4 days 17 minutes 31 seconds'::interval;
-- test justify_hours() and justify_days()
SELECT justify_hours(interval '6 months 3 days 52 hours 3 minutes 2 seconds') as "6 mons 5 days 4 hours 3 mins 2 seconds";
SELECT justify_days(interval '6 months 36 days 5 hours 4 minutes 3 seconds') as "7 mons 6 days 5 hours 4 mins 3 seconds";
-- test fractional second input, and detection of duplicate units
SET DATESTYLE = 'ISO';
SELECT '1 millisecond'::interval, '1 microsecond'::interval,
'500 seconds 99 milliseconds 51 microseconds'::interval;
SELECT '3 days 5 milliseconds'::interval;
SELECT '1 second 2 seconds'::interval; -- error
SELECT '10 milliseconds 20 milliseconds'::interval; -- error
SELECT '5.5 seconds 3 milliseconds'::interval; -- error
SELECT '1:20:05 5 microseconds'::interval; -- error
-- check that '30 days' equals '1 month' according to the hash function
select '30 days'::interval = '1 month'::interval as t;
select interval_hash('30 days'::interval) = interval_hash('1 month'::interval) as t;
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