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--
-- TIMESTAMP
--
CREATE TABLE TIMESTAMP_TBL (d1 timestamp(2) without time zone);
-- Test shorthand input values
-- We can't just "select" the results since they aren't constants; test for
-- equality instead. We can do that by running the test inside a transaction
-- block, within which the value of 'now' shouldn't change, and so these
-- related values shouldn't either.
BEGIN;
INSERT INTO TIMESTAMP_TBL VALUES ('today');
INSERT INTO TIMESTAMP_TBL VALUES ('yesterday');
INSERT INTO TIMESTAMP_TBL VALUES ('tomorrow');
SELECT count(*) AS One FROM TIMESTAMP_TBL WHERE d1 = timestamp without time zone 'today';
one
-----
1
(1 row)
SELECT count(*) AS One FROM TIMESTAMP_TBL WHERE d1 = timestamp without time zone 'yesterday';
one
-----
1
(1 row)
COMMIT;
-- Verify that 'now' *does* change over a reasonable interval such as 100 msec,
-- and that it doesn't change over the same interval within a transaction block
INSERT INTO TIMESTAMP_TBL VALUES ('now');
SELECT pg_sleep(0.1);
pg_sleep
----------
(1 row)
BEGIN;
INSERT INTO TIMESTAMP_TBL VALUES ('now');
SELECT pg_sleep(0.1);
pg_sleep
----------
(1 row)
INSERT INTO TIMESTAMP_TBL VALUES ('now');
SELECT pg_sleep(0.1);
pg_sleep
----------
(1 row)
COMMIT;
-- Special values
INSERT INTO TIMESTAMP_TBL VALUES ('-infinity');
INSERT INTO TIMESTAMP_TBL VALUES ('infinity');
INSERT INTO TIMESTAMP_TBL VALUES ('epoch');
-- ISO 8601 format
INSERT INTO TIMESTAMP_TBL VALUES ('1997-01-02');
INSERT INTO TIMESTAMP_TBL VALUES ('1997-01-02 03:04:05');
INSERT INTO TIMESTAMP_TBL VALUES ('1997-02-10 17:32:01-08');
INSERT INTO TIMESTAMP_TBL VALUES ('1997-02-10 17:32:01-0800');
INSERT INTO TIMESTAMP_TBL VALUES ('1997-02-10 17:32:01 -08:00');
INSERT INTO TIMESTAMP_TBL VALUES ('19970210 173201 -0800');
INSERT INTO TIMESTAMP_TBL VALUES ('1997-06-10 17:32:01 -07:00');
INSERT INTO TIMESTAMP_TBL VALUES ('2001-09-22T18:19:20');
-- POSIX format (note that the timezone abbrev is just decoration here)
INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 08:14:01 GMT+8');
INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 13:14:02 GMT-1');
INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 12:14:03 GMT-2');
INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 03:14:04 PST+8');
INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 02:14:05 MST+7:00');
-- Variations for acceptable input formats
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 10 17:32:01 1997 -0800');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 10 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 10 5:32PM 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('1997/02/10 17:32:01-0800');
set datestyle to ymd;
reset datestyle;
-- this fails (even though TZ is a no-op, we still look it up)
INSERT INTO TIMESTAMP_TBL VALUES ('19970710 173201 America/Does_not_exist');
ERROR: time zone "america/does_not_exist" not recognized
LINE 1: INSERT INTO TIMESTAMP_TBL VALUES ('19970710 173201 America/D...
^
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 10 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 11 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 12 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 13 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 14 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 15 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 0097 BC');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 0097');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 0597');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1097');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1697');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1797');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1897');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 2097');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 28 17:32:01 1996');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 29 17:32:01 1996');
INSERT INTO TIMESTAMP_TBL VALUES ('Mar 01 17:32:01 1996');
INSERT INTO TIMESTAMP_TBL VALUES ('Dec 30 17:32:01 1996');
INSERT INTO TIMESTAMP_TBL VALUES ('Dec 31 17:32:01 1996');
INSERT INTO TIMESTAMP_TBL VALUES ('Jan 01 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 28 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 29 17:32:01 1997');
ERROR: date/time field value out of range: "Feb 29 17:32:01 1997"
LINE 1: INSERT INTO TIMESTAMP_TBL VALUES ('Feb 29 17:32:01 1997');
^
INSERT INTO TIMESTAMP_TBL VALUES ('Mar 01 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Dec 30 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Dec 31 17:32:01 1997');
INSERT INTO TIMESTAMP_TBL VALUES ('Dec 31 17:32:01 1999');
INSERT INTO TIMESTAMP_TBL VALUES ('Jan 01 17:32:01 2000');
INSERT INTO TIMESTAMP_TBL VALUES ('Dec 31 17:32:01 2000');
INSERT INTO TIMESTAMP_TBL VALUES ('Jan 01 17:32:01 2001');
-- Currently unsupported syntax and ranges
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 -0097');
ERROR: time zone displacement out of range: "Feb 16 17:32:01 -0097"
LINE 1: INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 -0097');
^
INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 5097 BC');
ERROR: timestamp out of range: "Feb 16 17:32:01 5097 BC"
LINE 1: INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 5097 BC')...
^
SELECT '4714-11-23 23:59:59 BC'::timestamp; -- out of range
ERROR: timestamp out of range: "4714-11-23 23:59:59 BC"
LINE 1: SELECT '4714-11-23 23:59:59 BC'::timestamp;
^
SELECT '294277-01-01 00:00:00'::timestamp; -- out of range
ERROR: timestamp out of range: "294277-01-01 00:00:00"
LINE 1: SELECT '294277-01-01 00:00:00'::timestamp;
^
-- verify date_bin behaves the same as date_trunc for relevant intervals
-- case 1: AD dates, origin < input
SELECT
str,
interval,
date_trunc(str, ts) = date_bin(interval::interval, ts, timestamp '2001-01-01') AS equal
FROM (
VALUES
('week', '7 d'),
('day', '1 d'),
('hour', '1 h'),
('minute', '1 m'),
('second', '1 s'),
('millisecond', '1 ms'),
('microsecond', '1 us')
) intervals (str, interval),
(VALUES (timestamp '2020-02-29 15:44:17.71393')) ts (ts);
str | interval | equal
-------------+----------+-------
week | 7 d | t
day | 1 d | t
hour | 1 h | t
minute | 1 m | t
second | 1 s | t
millisecond | 1 ms | t
microsecond | 1 us | t
(7 rows)
-- case 2: BC dates, origin < input
SELECT
str,
interval,
date_trunc(str, ts) = date_bin(interval::interval, ts, timestamp '2000-01-01 BC') AS equal
FROM (
VALUES
('week', '7 d'),
('day', '1 d'),
('hour', '1 h'),
('minute', '1 m'),
('second', '1 s'),
('millisecond', '1 ms'),
('microsecond', '1 us')
) intervals (str, interval),
(VALUES (timestamp '0055-6-10 15:44:17.71393 BC')) ts (ts);
str | interval | equal
-------------+----------+-------
week | 7 d | t
day | 1 d | t
hour | 1 h | t
minute | 1 m | t
second | 1 s | t
millisecond | 1 ms | t
microsecond | 1 us | t
(7 rows)
-- case 3: AD dates, origin > input
SELECT
str,
interval,
date_trunc(str, ts) = date_bin(interval::interval, ts, timestamp '2020-03-02') AS equal
FROM (
VALUES
('week', '7 d'),
('day', '1 d'),
('hour', '1 h'),
('minute', '1 m'),
('second', '1 s'),
('millisecond', '1 ms'),
('microsecond', '1 us')
) intervals (str, interval),
(VALUES (timestamp '2020-02-29 15:44:17.71393')) ts (ts);
str | interval | equal
-------------+----------+-------
week | 7 d | t
day | 1 d | t
hour | 1 h | t
minute | 1 m | t
second | 1 s | t
millisecond | 1 ms | t
microsecond | 1 us | t
(7 rows)
-- case 4: BC dates, origin > input
SELECT
str,
interval,
date_trunc(str, ts) = date_bin(interval::interval, ts, timestamp '0055-06-17 BC') AS equal
FROM (
VALUES
('week', '7 d'),
('day', '1 d'),
('hour', '1 h'),
('minute', '1 m'),
('second', '1 s'),
('millisecond', '1 ms'),
('microsecond', '1 us')
) intervals (str, interval),
(VALUES (timestamp '0055-6-10 15:44:17.71393 BC')) ts (ts);
str | interval | equal
-------------+----------+-------
week | 7 d | t
day | 1 d | t
hour | 1 h | t
minute | 1 m | t
second | 1 s | t
millisecond | 1 ms | t
microsecond | 1 us | t
(7 rows)
-- disallow intervals with months or years
SELECT date_bin('5 months'::interval, timestamp '2020-02-01 01:01:01', timestamp '2001-01-01');
ERROR: timestamps cannot be binned into intervals containing months or years
SELECT date_bin('5 years'::interval, timestamp '2020-02-01 01:01:01', timestamp '2001-01-01');
ERROR: timestamps cannot be binned into intervals containing months or years
-- disallow zero intervals
SELECT date_bin('0 days'::interval, timestamp '1970-01-01 01:00:00' , timestamp '1970-01-01 00:00:00');
ERROR: stride must be greater than zero
-- disallow negative intervals
SELECT date_bin('-2 days'::interval, timestamp '1970-01-01 01:00:00' , timestamp '1970-01-01 00:00:00');
ERROR: stride must be greater than zero
-- value near upper bound uses special case in code
SELECT date_part('epoch', '294270-01-01 00:00:00'::timestamp);
date_part
---------------
9224097091200
(1 row)
SELECT extract(epoch from '294270-01-01 00:00:00'::timestamp);
extract
----------------------
9224097091200.000000
(1 row)
-- another internal overflow test case
SELECT extract(epoch from '5000-01-01 00:00:00'::timestamp);
extract
--------------------
95617584000.000000
(1 row)
SELECT to_char(d, 'FF1 FF2 FF3 FF4 FF5 FF6 ff1 ff2 ff3 ff4 ff5 ff6 MS US')
FROM (VALUES
('2018-11-02 12:34:56'::timestamp),
('2018-11-02 12:34:56.78'),
('2018-11-02 12:34:56.78901'),
('2018-11-02 12:34:56.78901234')
) d(d);
to_char
--------------------------------------------------------------------
0 00 000 0000 00000 000000 0 00 000 0000 00000 000000 000 000000
7 78 780 7800 78000 780000 7 78 780 7800 78000 780000 780 780000
7 78 789 7890 78901 789010 7 78 789 7890 78901 789010 789 789010
7 78 789 7890 78901 789012 7 78 789 7890 78901 789012 789 789012
(4 rows)
-- should fail
select make_timestamp(0, 7, 15, 12, 30, 15);
ERROR: date field value out of range: 0-07-15
-- errors
select * from generate_series('2020-01-01 00:00'::timestamp,
'2020-01-02 03:00'::timestamp,
'0 hour'::interval);
ERROR: step size cannot equal zero
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