6a9b93a0e1
some small stylistic improvements in these functions. Also fix several places where TMODULO() was being used with wrong-sized quotient argument, creating a risk of overflow --- interval2tm was actually capable of going into an infinite loop because of this.
244 lines
6.9 KiB
Plaintext
244 lines
6.9 KiB
Plaintext
--
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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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One hour
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----------
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01:00:00
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(1 row)
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SELECT INTERVAL '+02:00' AS "Two hours";
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Two hours
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-----------
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02:00:00
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(1 row)
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SELECT INTERVAL '-08:00' AS "Eight hours";
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Eight hours
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-------------
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-08:00:00
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(1 row)
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SELECT INTERVAL '-05' AS "Five hours";
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Five hours
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------------
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-05:00:00
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(1 row)
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SELECT INTERVAL '-1 +02:03' AS "22 hours ago...";
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22 hours ago...
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-------------------
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-1 days +02:03:00
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(1 row)
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SELECT INTERVAL '-1 days +02:03' AS "22 hours ago...";
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22 hours ago...
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-------------------
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-1 days +02:03:00
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(1 row)
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SELECT INTERVAL '10 years -11 month -12 days +13:14' AS "9 years...";
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9 years...
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----------------------------------
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9 years 1 mon -12 days +13:14:00
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(1 row)
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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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ERROR: invalid input syntax for type interval: "badly formatted interval"
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INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 30 eons ago');
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ERROR: invalid input syntax for type interval: "@ 30 eons ago"
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-- test interval operators
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SELECT '' AS ten, * FROM INTERVAL_TBL;
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ten | f1
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-----+-----------------
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| 00:01:00
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| 05:00:00
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| 10 days
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| 34 years
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| 3 mons
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| -00:00:14
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| 1 day 02:03:04
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| 6 years
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| 5 mons
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| 5 mons 12:00:00
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(10 rows)
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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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nine | f1
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------+-----------------
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| 00:01:00
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| 05:00:00
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| 34 years
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| 3 mons
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| -00:00:14
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| 1 day 02:03:04
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| 6 years
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| 5 mons
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| 5 mons 12:00:00
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(9 rows)
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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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three | f1
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-------+-----------
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| 00:01:00
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| 05:00:00
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| -00:00:14
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(3 rows)
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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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three | f1
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-------+-----------
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| 00:01:00
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| 05:00:00
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| -00:00:14
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(3 rows)
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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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one | f1
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-----+----------
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| 34 years
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(1 row)
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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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five | f1
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------+-----------------
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| 34 years
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| 3 mons
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| 6 years
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| 5 mons
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| 5 mons 12:00:00
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(5 rows)
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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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nine | f1
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------+-----------------
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| 00:01:00
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| 05:00:00
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| 10 days
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| 34 years
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| 3 mons
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| 1 day 02:03:04
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| 6 years
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| 5 mons
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| 5 mons 12:00:00
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(9 rows)
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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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fortyfive | f1 | f1
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-----------+-----------------+-----------------
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| 00:01:00 | -00:00:14
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| 05:00:00 | -00:00:14
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| 05:00:00 | 00:01:00
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| 1 day 02:03:04 | -00:00:14
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| 1 day 02:03:04 | 00:01:00
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| 1 day 02:03:04 | 05:00:00
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| 10 days | -00:00:14
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| 10 days | 00:01:00
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| 10 days | 05:00:00
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| 10 days | 1 day 02:03:04
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| 3 mons | -00:00:14
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| 3 mons | 00:01:00
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| 3 mons | 05:00:00
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| 3 mons | 1 day 02:03:04
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| 3 mons | 10 days
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| 5 mons | -00:00:14
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| 5 mons | 00:01:00
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| 5 mons | 05:00:00
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| 5 mons | 1 day 02:03:04
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| 5 mons | 10 days
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| 5 mons | 3 mons
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| 5 mons 12:00:00 | -00:00:14
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| 5 mons 12:00:00 | 00:01:00
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| 5 mons 12:00:00 | 05:00:00
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| 5 mons 12:00:00 | 1 day 02:03:04
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| 5 mons 12:00:00 | 10 days
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| 5 mons 12:00:00 | 3 mons
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| 5 mons 12:00:00 | 5 mons
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| 6 years | -00:00:14
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| 6 years | 00:01:00
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| 6 years | 05:00:00
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| 6 years | 1 day 02:03:04
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| 6 years | 10 days
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| 6 years | 3 mons
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| 6 years | 5 mons
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| 6 years | 5 mons 12:00:00
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| 34 years | -00:00:14
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| 34 years | 00:01:00
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| 34 years | 05:00:00
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| 34 years | 1 day 02:03:04
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| 34 years | 10 days
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| 34 years | 3 mons
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| 34 years | 5 mons
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| 34 years | 5 mons 12:00:00
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| 34 years | 6 years
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(45 rows)
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SET DATESTYLE = 'postgres';
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SELECT '' AS ten, * FROM INTERVAL_TBL;
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ten | f1
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-----+-------------------------------
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| @ 1 min
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| @ 5 hours
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| @ 10 days
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| @ 34 years
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| @ 3 mons
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| @ 14 secs ago
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| @ 1 day 2 hours 3 mins 4 secs
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| @ 6 years
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| @ 5 mons
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| @ 5 mons 12 hours
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(10 rows)
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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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avg
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-------------------------------------------------
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@ 4 years 1 mon 9 days 28 hours 18 mins 23 secs
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(1 row)
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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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interval
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--------------------------------------------
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@ 4541 years 4 mons 4 days 17 mins 31 secs
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(1 row)
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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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6 mons 5 days 4 hours 3 mins 2 seconds
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----------------------------------------
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@ 6 mons 5 days 4 hours 3 mins 2 secs
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(1 row)
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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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7 mons 6 days 5 hours 4 mins 3 seconds
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----------------------------------------
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@ 7 mons 6 days 5 hours 4 mins 3 secs
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(1 row)
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