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6af04882de
"microsecond" and "millisecond" units were not considered valid input by themselves, which caused inputs like "1 millisecond" to be rejected erroneously. Update the docs, add regression tests, and backport to 8.2 and 8.1
129 lines
4.2 KiB
SQL
129 lines
4.2 KiB
SQL
--
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-- INTERVAL
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--
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SET DATESTYLE = 'ISO';
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-- check acceptance of "time zone style"
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SELECT INTERVAL '01:00' AS "One hour";
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SELECT INTERVAL '+02:00' AS "Two hours";
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SELECT INTERVAL '-08:00' AS "Eight hours";
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SELECT INTERVAL '-05' AS "Five hours";
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SELECT INTERVAL '-1 +02:03' AS "22 hours ago...";
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SELECT INTERVAL '-1 days +02:03' AS "22 hours ago...";
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SELECT INTERVAL '1.5 weeks' AS "Ten days twelve hours";
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SELECT INTERVAL '1.5 months' AS "One month 15 days";
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SELECT INTERVAL '10 years -11 month -12 days +13:14' AS "9 years...";
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CREATE TABLE INTERVAL_TBL (f1 interval);
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INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 1 minute');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 5 hour');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 10 day');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 34 year');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 3 months');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 14 seconds ago');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('1 day 2 hours 3 minutes 4 seconds');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('6 years');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('5 months');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('5 months 12 hours');
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-- badly formatted interval
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INSERT INTO INTERVAL_TBL (f1) VALUES ('badly formatted interval');
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INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 30 eons ago');
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-- test interval operators
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SELECT '' AS ten, * FROM INTERVAL_TBL;
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SELECT '' AS nine, * FROM INTERVAL_TBL
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WHERE INTERVAL_TBL.f1 <> interval '@ 10 days';
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SELECT '' AS three, * FROM INTERVAL_TBL
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WHERE INTERVAL_TBL.f1 <= interval '@ 5 hours';
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SELECT '' AS three, * FROM INTERVAL_TBL
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WHERE INTERVAL_TBL.f1 < interval '@ 1 day';
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SELECT '' AS one, * FROM INTERVAL_TBL
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WHERE INTERVAL_TBL.f1 = interval '@ 34 years';
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SELECT '' AS five, * FROM INTERVAL_TBL
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WHERE INTERVAL_TBL.f1 >= interval '@ 1 month';
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SELECT '' AS nine, * FROM INTERVAL_TBL
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WHERE INTERVAL_TBL.f1 > interval '@ 3 seconds ago';
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SELECT '' AS fortyfive, r1.*, r2.*
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FROM INTERVAL_TBL r1, INTERVAL_TBL r2
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WHERE r1.f1 > r2.f1
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ORDER BY r1.f1, r2.f1;
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-- Test multiplication and division with intervals.
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-- Floating point arithmetic rounding errors can lead to unexpected results,
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-- though the code attempts to do the right thing and round up to days and
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-- minutes to avoid results such as '3 days 24:00 hours' or '14:20:60'.
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-- Note that it is expected for some day components to be greater than 29 and
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-- some time components be greater than 23:59:59 due to how intervals are
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-- stored internally.
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CREATE TABLE INTERVAL_MULDIV_TBL (span interval);
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COPY INTERVAL_MULDIV_TBL FROM STDIN;
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41 mon 12 days 360:00
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-41 mon -12 days +360:00
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-12 days
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9 mon -27 days 12:34:56
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-3 years 482 days 76:54:32.189
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4 mon
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14 mon
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999 mon 999 days
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\.
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SELECT span * 0.3 AS product
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FROM INTERVAL_MULDIV_TBL;
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SELECT span * 8.2 AS product
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FROM INTERVAL_MULDIV_TBL;
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SELECT span / 10 AS quotient
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FROM INTERVAL_MULDIV_TBL;
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SELECT span / 100 AS quotient
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FROM INTERVAL_MULDIV_TBL;
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DROP TABLE INTERVAL_MULDIV_TBL;
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SET DATESTYLE = 'postgres';
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SELECT '' AS ten, * FROM INTERVAL_TBL;
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-- test avg(interval), which is somewhat fragile since people have been
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-- known to change the allowed input syntax for type interval without
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-- updating pg_aggregate.agginitval
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select avg(f1) from interval_tbl;
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-- test long interval input
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select '4 millenniums 5 centuries 4 decades 1 year 4 months 4 days 17 minutes 31 seconds'::interval;
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-- test justify_hours() and justify_days()
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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";
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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";
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-- test justify_interval()
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SELECT justify_interval(interval '1 month -1 hour') as "1 month -1 hour";
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-- test fractional second input, and detection of duplicate units
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SET DATESTYLE = 'ISO';
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SELECT '1 millisecond'::interval, '1 microsecond'::interval,
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'500 seconds 99 milliseconds 51 microseconds'::interval;
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SELECT '3 days 5 milliseconds'::interval;
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SELECT '1 second 2 seconds'::interval; -- error
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SELECT '10 milliseconds 20 milliseconds'::interval; -- error
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SELECT '5.5 seconds 3 milliseconds'::interval; -- error
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SELECT '1:20:05 5 microseconds'::interval; -- error |