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more consistent with other cases, by having an unlabeled integer field be treated as a number of minutes or seconds respectively. These cases are outside the spec (which insists on full "dd hh:mm" or "dd hh:mm:ss" input respectively), so it's not much help to us in deciding what to do. But with this change, it's uniformly the case that an unlabeled integer will be considered as being a number of the interval's rightmost field. The change also takes us back to the 8.3 behavior of throwing error for certain ambiguous inputs such as INTERVAL '1 2' DAY TO MINUTE. Per recent discussion.
775 lines
23 KiB
Plaintext
775 lines
23 KiB
Plaintext
--
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-- INTERVAL
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--
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SET DATESTYLE = 'ISO';
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SET IntervalStyle to postgres;
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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 '-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 '1.5 weeks' AS "Ten days twelve hours";
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Ten days twelve hours
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-----------------------
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10 days 12:00:00
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(1 row)
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SELECT INTERVAL '1.5 months' AS "One month 15 days";
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One month 15 days
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-------------------
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1 mon 15 days
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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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LINE 1: INSERT INTO INTERVAL_TBL (f1) VALUES ('badly formatted inter...
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^
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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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LINE 1: INSERT INTO INTERVAL_TBL (f1) VALUES ('@ 30 eons ago');
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^
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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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-- 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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SELECT span * 0.3 AS product
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FROM INTERVAL_MULDIV_TBL;
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product
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------------------------------------
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1 year 12 days 122:24:00
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-1 years -12 days +93:36:00
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-3 days -14:24:00
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2 mons 13 days 01:22:28.8
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-10 mons +120 days 37:28:21.6567
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1 mon 6 days
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4 mons 6 days
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24 years 11 mons 320 days 16:48:00
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(8 rows)
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SELECT span * 8.2 AS product
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FROM INTERVAL_MULDIV_TBL;
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product
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---------------------------------------------
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28 years 104 days 2961:36:00
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-28 years -104 days +2942:24:00
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-98 days -09:36:00
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6 years 1 mon -197 days +93:34:27.2
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-24 years -7 mons +3946 days 640:15:11.9498
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2 years 8 mons 24 days
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9 years 6 mons 24 days
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682 years 7 mons 8215 days 19:12:00
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(8 rows)
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SELECT span / 10 AS quotient
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FROM INTERVAL_MULDIV_TBL;
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quotient
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----------------------------------
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4 mons 4 days 40:48:00
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-4 mons -4 days +31:12:00
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-1 days -04:48:00
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25 days -15:32:30.4
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-3 mons +30 days 12:29:27.2189
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12 days
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1 mon 12 days
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8 years 3 mons 126 days 21:36:00
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(8 rows)
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SELECT span / 100 AS quotient
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FROM INTERVAL_MULDIV_TBL;
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quotient
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-------------------------
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12 days 13:40:48
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-12 days -06:28:48
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-02:52:48
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2 days 10:26:44.96
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-6 days +01:14:56.72189
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1 day 04:48:00
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4 days 04:48:00
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9 mons 39 days 16:33:36
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(8 rows)
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DROP TABLE INTERVAL_MULDIV_TBL;
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SET DATESTYLE = 'postgres';
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SET IntervalStyle to postgres_verbose;
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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 10 days 4 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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-- test justify_interval()
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SELECT justify_interval(interval '1 month -1 hour') as "1 month -1 hour";
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1 month -1 hour
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--------------------
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@ 29 days 23 hours
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(1 row)
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-- test fractional second input, and detection of duplicate units
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SET DATESTYLE = 'ISO';
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SET IntervalStyle TO postgres;
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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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interval | interval | interval
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--------------+-----------------+-----------------
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00:00:00.001 | 00:00:00.000001 | 00:08:20.099051
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(1 row)
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SELECT '3 days 5 milliseconds'::interval;
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interval
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---------------------
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3 days 00:00:00.005
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(1 row)
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SELECT '1 second 2 seconds'::interval; -- error
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ERROR: invalid input syntax for type interval: "1 second 2 seconds"
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LINE 1: SELECT '1 second 2 seconds'::interval;
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^
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SELECT '10 milliseconds 20 milliseconds'::interval; -- error
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ERROR: invalid input syntax for type interval: "10 milliseconds 20 milliseconds"
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LINE 1: SELECT '10 milliseconds 20 milliseconds'::interval;
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^
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SELECT '5.5 seconds 3 milliseconds'::interval; -- error
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ERROR: invalid input syntax for type interval: "5.5 seconds 3 milliseconds"
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LINE 1: SELECT '5.5 seconds 3 milliseconds'::interval;
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^
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SELECT '1:20:05 5 microseconds'::interval; -- error
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ERROR: invalid input syntax for type interval: "1:20:05 5 microseconds"
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LINE 1: SELECT '1:20:05 5 microseconds'::interval;
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^
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SELECT '1 day 1 day'::interval; -- error
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ERROR: invalid input syntax for type interval: "1 day 1 day"
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LINE 1: SELECT '1 day 1 day'::interval;
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^
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SELECT interval '1-2'; -- SQL year-month literal
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interval
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---------------
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1 year 2 mons
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(1 row)
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SELECT interval '999' second; -- oversize leading field is ok
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interval
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----------
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00:16:39
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(1 row)
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SELECT interval '999' minute;
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interval
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----------
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16:39:00
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(1 row)
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SELECT interval '999' hour;
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interval
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-----------
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999:00:00
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(1 row)
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SELECT interval '999' day;
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interval
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----------
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999 days
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(1 row)
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SELECT interval '999' month;
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interval
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-----------------
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83 years 3 mons
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(1 row)
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-- test SQL-spec syntaxes for restricted field sets
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SELECT interval '1' year;
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interval
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----------
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1 year
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(1 row)
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SELECT interval '2' month;
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interval
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----------
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2 mons
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(1 row)
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SELECT interval '3' day;
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interval
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----------
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3 days
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(1 row)
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SELECT interval '4' hour;
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interval
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----------
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04:00:00
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(1 row)
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SELECT interval '5' minute;
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interval
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----------
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00:05:00
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(1 row)
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SELECT interval '6' second;
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interval
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----------
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00:00:06
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(1 row)
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SELECT interval '1' year to month;
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interval
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----------
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1 mon
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(1 row)
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SELECT interval '1-2' year to month;
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interval
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---------------
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1 year 2 mons
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(1 row)
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SELECT interval '1 2' day to hour;
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interval
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----------------
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1 day 02:00:00
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(1 row)
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SELECT interval '1 2:03' day to hour;
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interval
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----------------
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1 day 02:00:00
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(1 row)
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SELECT interval '1 2:03:04' day to hour;
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interval
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----------------
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1 day 02:00:00
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(1 row)
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SELECT interval '1 2' day to minute;
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ERROR: invalid input syntax for type interval: "1 2"
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LINE 1: SELECT interval '1 2' day to minute;
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^
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SELECT interval '1 2:03' day to minute;
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interval
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----------------
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1 day 02:03:00
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(1 row)
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SELECT interval '1 2:03:04' day to minute;
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interval
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----------------
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1 day 02:03:00
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(1 row)
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SELECT interval '1 2' day to second;
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ERROR: invalid input syntax for type interval: "1 2"
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LINE 1: SELECT interval '1 2' day to second;
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^
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SELECT interval '1 2:03' day to second;
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interval
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----------------
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1 day 02:03:00
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(1 row)
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SELECT interval '1 2:03:04' day to second;
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interval
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----------------
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1 day 02:03:04
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(1 row)
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SELECT interval '1 2' hour to minute;
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ERROR: invalid input syntax for type interval: "1 2"
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LINE 1: SELECT interval '1 2' hour to minute;
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^
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SELECT interval '1 2:03' hour to minute;
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interval
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----------------
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1 day 02:03:00
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(1 row)
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SELECT interval '1 2:03:04' hour to minute;
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interval
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----------------
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1 day 02:03:00
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(1 row)
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SELECT interval '1 2' hour to second;
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ERROR: invalid input syntax for type interval: "1 2"
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LINE 1: SELECT interval '1 2' hour to second;
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^
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SELECT interval '1 2:03' hour to second;
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interval
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----------------
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1 day 02:03:00
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(1 row)
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SELECT interval '1 2:03:04' hour to second;
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interval
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----------------
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1 day 02:03:04
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(1 row)
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SELECT interval '1 2' minute to second;
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ERROR: invalid input syntax for type interval: "1 2"
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LINE 1: SELECT interval '1 2' minute to second;
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^
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SELECT interval '1 2:03' minute to second;
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interval
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----------------
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1 day 00:02:03
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(1 row)
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SELECT interval '1 2:03:04' minute to second;
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interval
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----------------
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1 day 02:03:04
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(1 row)
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SELECT interval '123 11' day to hour; -- ok
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interval
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-------------------
|
|
123 days 11:00:00
|
|
(1 row)
|
|
|
|
SELECT interval '123 11' day; -- not ok
|
|
ERROR: invalid input syntax for type interval: "123 11"
|
|
LINE 1: SELECT interval '123 11' day;
|
|
^
|
|
SELECT interval '123 11'; -- not ok, too ambiguous
|
|
ERROR: invalid input syntax for type interval: "123 11"
|
|
LINE 1: SELECT interval '123 11';
|
|
^
|
|
-- test syntaxes for restricted precision
|
|
SELECT interval(0) '1 day 01:23:45.6789';
|
|
interval
|
|
----------------
|
|
1 day 01:23:46
|
|
(1 row)
|
|
|
|
SELECT interval(2) '1 day 01:23:45.6789';
|
|
interval
|
|
-------------------
|
|
1 day 01:23:45.68
|
|
(1 row)
|
|
|
|
SELECT interval '12:34.5678' minute to second(2); -- per SQL spec
|
|
interval
|
|
-------------
|
|
00:12:34.57
|
|
(1 row)
|
|
|
|
SELECT interval(2) '12:34.5678' minute to second; -- historical PG
|
|
interval
|
|
-------------
|
|
00:12:34.57
|
|
(1 row)
|
|
|
|
SELECT interval(2) '12:34.5678' minute to second(2); -- syntax error
|
|
ERROR: interval precision specified twice
|
|
LINE 1: SELECT interval(2) '12:34.5678' minute to second(2);
|
|
^
|
|
SELECT interval '1.234' second;
|
|
interval
|
|
--------------
|
|
00:00:01.234
|
|
(1 row)
|
|
|
|
SELECT interval '1.234' second(2);
|
|
interval
|
|
-------------
|
|
00:00:01.23
|
|
(1 row)
|
|
|
|
SELECT interval '1 2.345' day to second(2);
|
|
ERROR: invalid input syntax for type interval: "1 2.345"
|
|
LINE 1: SELECT interval '1 2.345' day to second(2);
|
|
^
|
|
SELECT interval '1 2:03' day to second(2);
|
|
interval
|
|
----------------
|
|
1 day 02:03:00
|
|
(1 row)
|
|
|
|
SELECT interval '1 2:03.4567' day to second(2);
|
|
interval
|
|
-------------------
|
|
1 day 00:02:03.46
|
|
(1 row)
|
|
|
|
SELECT interval '1 2:03:04.5678' day to second(2);
|
|
interval
|
|
-------------------
|
|
1 day 02:03:04.57
|
|
(1 row)
|
|
|
|
SELECT interval '1 2.345' hour to second(2);
|
|
ERROR: invalid input syntax for type interval: "1 2.345"
|
|
LINE 1: SELECT interval '1 2.345' hour to second(2);
|
|
^
|
|
SELECT interval '1 2:03.45678' hour to second(2);
|
|
interval
|
|
-------------------
|
|
1 day 00:02:03.46
|
|
(1 row)
|
|
|
|
SELECT interval '1 2:03:04.5678' hour to second(2);
|
|
interval
|
|
-------------------
|
|
1 day 02:03:04.57
|
|
(1 row)
|
|
|
|
SELECT interval '1 2.3456' minute to second(2);
|
|
ERROR: invalid input syntax for type interval: "1 2.3456"
|
|
LINE 1: SELECT interval '1 2.3456' minute to second(2);
|
|
^
|
|
SELECT interval '1 2:03.5678' minute to second(2);
|
|
interval
|
|
-------------------
|
|
1 day 00:02:03.57
|
|
(1 row)
|
|
|
|
SELECT interval '1 2:03:04.5678' minute to second(2);
|
|
interval
|
|
-------------------
|
|
1 day 02:03:04.57
|
|
(1 row)
|
|
|
|
-- test inputting and outputting SQL standard interval literals
|
|
SET IntervalStyle TO sql_standard;
|
|
SELECT interval '0' AS "zero",
|
|
interval '1-2' year to month AS "year-month",
|
|
interval '1 2:03:04' day to second AS "day-time",
|
|
- interval '1-2' AS "negative year-month",
|
|
- interval '1 2:03:04' AS "negative day-time";
|
|
zero | year-month | day-time | negative year-month | negative day-time
|
|
------+------------+-----------+---------------------+-------------------
|
|
0 | 1-2 | 1 2:03:04 | -1-2 | -1 2:03:04
|
|
(1 row)
|
|
|
|
-- test input of some not-quite-standard interval values in the sql style
|
|
SET IntervalStyle TO postgres;
|
|
SELECT interval '+1 -1:00:00',
|
|
interval '-1 +1:00:00',
|
|
interval '+1-2 -3 +4:05:06.789',
|
|
interval '-1-2 +3 -4:05:06.789';
|
|
interval | interval | interval | interval
|
|
-----------------+-------------------+-------------------------------------+----------------------------------------
|
|
1 day -01:00:00 | -1 days +01:00:00 | 1 year 2 mons -3 days +04:05:06.789 | -1 years -2 mons +3 days -04:05:06.789
|
|
(1 row)
|
|
|
|
-- test output of couple non-standard interval values in the sql style
|
|
SET IntervalStyle TO sql_standard;
|
|
SELECT interval '1 day -1 hours',
|
|
interval '-1 days +1 hours',
|
|
interval '1 years 2 months -3 days 4 hours 5 minutes 6.789 seconds',
|
|
- interval '1 years 2 months -3 days 4 hours 5 minutes 6.789 seconds';
|
|
interval | interval | interval | ?column?
|
|
------------------+------------------+----------------------+----------------------
|
|
+0-0 +1 -1:00:00 | +0-0 -1 +1:00:00 | +1-2 -3 +4:05:06.789 | -1-2 +3 -4:05:06.789
|
|
(1 row)
|
|
|
|
-- test outputting iso8601 intervals
|
|
SET IntervalStyle to iso_8601;
|
|
select interval '0' AS "zero",
|
|
interval '1-2' AS "a year 2 months",
|
|
interval '1 2:03:04' AS "a bit over a day",
|
|
interval '2:03:04.45679' AS "a bit over 2 hours",
|
|
(interval '1-2' + interval '3 4:05:06.7') AS "all fields",
|
|
(interval '1-2' - interval '3 4:05:06.7') AS "mixed sign",
|
|
(- interval '1-2' + interval '3 4:05:06.7') AS "negative";
|
|
zero | a year 2 months | a bit over a day | a bit over 2 hours | all fields | mixed sign | negative
|
|
------+-----------------+------------------+--------------------+------------------+----------------------+--------------------
|
|
PT0S | P1Y2M | P1DT2H3M4S | PT2H3M4.45679S | P1Y2M3DT4H5M6.7S | P1Y2M-3DT-4H-5M-6.7S | P-1Y-2M3DT4H5M6.7S
|
|
(1 row)
|
|
|
|
-- test inputting ISO 8601 4.4.2.1 "Format With Time Unit Designators"
|
|
SET IntervalStyle to sql_standard;
|
|
select interval 'P0Y' AS "zero",
|
|
interval 'P1Y2M' AS "a year 2 months",
|
|
interval 'P1W' AS "a week",
|
|
interval 'P1DT2H3M4S' AS "a bit over a day",
|
|
interval 'P1Y2M3DT4H5M6.7S' AS "all fields",
|
|
interval 'P-1Y-2M-3DT-4H-5M-6.7S' AS "negative",
|
|
interval 'PT-0.1S' AS "fractional second";
|
|
zero | a year 2 months | a week | a bit over a day | all fields | negative | fractional second
|
|
------+-----------------+-----------+------------------+--------------------+--------------------+-------------------
|
|
0 | 1-2 | 7 0:00:00 | 1 2:03:04 | +1-2 +3 +4:05:06.7 | -1-2 -3 -4:05:06.7 | -0:00:00.1
|
|
(1 row)
|
|
|
|
-- test inputting ISO 8601 4.4.2.2 "Alternative Format"
|
|
SET IntervalStyle to postgres;
|
|
select interval 'P00021015T103020' AS "ISO8601 Basic Format",
|
|
interval 'P0002-10-15T10:30:20' AS "ISO8601 Extended Format";
|
|
ISO8601 Basic Format | ISO8601 Extended Format
|
|
----------------------------------+----------------------------------
|
|
2 years 10 mons 15 days 10:30:20 | 2 years 10 mons 15 days 10:30:20
|
|
(1 row)
|
|
|
|
-- Make sure optional ISO8601 alternative format fields are optional.
|
|
select interval 'P0002' AS "year only",
|
|
interval 'P0002-10' AS "year month",
|
|
interval 'P0002-10-15' AS "year month day",
|
|
interval 'P0002T1S' AS "year only plus time",
|
|
interval 'P0002-10T1S' AS "year month plus time",
|
|
interval 'P0002-10-15T1S' AS "year month day plus time",
|
|
interval 'PT10' AS "hour only",
|
|
interval 'PT10:30' AS "hour minute";
|
|
year only | year month | year month day | year only plus time | year month plus time | year month day plus time | hour only | hour minute
|
|
-----------+-----------------+-------------------------+---------------------+--------------------------+----------------------------------+-----------+-------------
|
|
2 years | 2 years 10 mons | 2 years 10 mons 15 days | 2 years 00:00:01 | 2 years 10 mons 00:00:01 | 2 years 10 mons 15 days 00:00:01 | 10:00:00 | 10:30:00
|
|
(1 row)
|
|
|
|
-- test a couple rounding cases that changed since 8.3 w/ HAVE_INT64_TIMESTAMP.
|
|
SET IntervalStyle to postgres_verbose;
|
|
select interval '-10 mons -3 days +03:55:06.70';
|
|
interval
|
|
--------------------------------------------------
|
|
@ 10 mons 3 days -3 hours -55 mins -6.7 secs ago
|
|
(1 row)
|
|
|
|
select interval '1 year 2 mons 3 days 04:05:06.699999';
|
|
interval
|
|
-----------------------------------------------------
|
|
@ 1 year 2 mons 3 days 4 hours 5 mins 6.699999 secs
|
|
(1 row)
|
|
|
|
select interval '0:0:0.7', interval '@ 0.70 secs', interval '0.7 seconds';
|
|
interval | interval | interval
|
|
------------+------------+------------
|
|
@ 0.7 secs | @ 0.7 secs | @ 0.7 secs
|
|
(1 row)
|
|
|
|
-- check that '30 days' equals '1 month' according to the hash function
|
|
select '30 days'::interval = '1 month'::interval as t;
|
|
t
|
|
---
|
|
t
|
|
(1 row)
|
|
|
|
select interval_hash('30 days'::interval) = interval_hash('1 month'::interval) as t;
|
|
t
|
|
---
|
|
t
|
|
(1 row)
|
|
|