419 lines
15 KiB
PL/PgSQL
419 lines
15 KiB
PL/PgSQL
--
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-- TIMESTAMP
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--
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CREATE TABLE TIMESTAMP_TBL (d1 timestamp(2) without time zone);
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-- Test shorthand input values
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-- We can't just "select" the results since they aren't constants; test for
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-- equality instead. We can do that by running the test inside a transaction
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-- block, within which the value of 'now' shouldn't change, and so these
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-- related values shouldn't either.
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BEGIN;
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INSERT INTO TIMESTAMP_TBL VALUES ('today');
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INSERT INTO TIMESTAMP_TBL VALUES ('yesterday');
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INSERT INTO TIMESTAMP_TBL VALUES ('tomorrow');
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-- time zone should be ignored by this data type
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INSERT INTO TIMESTAMP_TBL VALUES ('tomorrow EST');
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INSERT INTO TIMESTAMP_TBL VALUES ('tomorrow zulu');
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SELECT count(*) AS One FROM TIMESTAMP_TBL WHERE d1 = timestamp without time zone 'today';
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SELECT count(*) AS Three FROM TIMESTAMP_TBL WHERE d1 = timestamp without time zone 'tomorrow';
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SELECT count(*) AS One FROM TIMESTAMP_TBL WHERE d1 = timestamp without time zone 'yesterday';
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COMMIT;
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DELETE FROM TIMESTAMP_TBL;
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-- Verify that 'now' *does* change over a reasonable interval such as 100 msec,
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-- and that it doesn't change over the same interval within a transaction block
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INSERT INTO TIMESTAMP_TBL VALUES ('now');
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SELECT pg_sleep(0.1);
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BEGIN;
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INSERT INTO TIMESTAMP_TBL VALUES ('now');
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SELECT pg_sleep(0.1);
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INSERT INTO TIMESTAMP_TBL VALUES ('now');
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SELECT pg_sleep(0.1);
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SELECT count(*) AS two FROM TIMESTAMP_TBL WHERE d1 = timestamp(2) without time zone 'now';
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SELECT count(d1) AS three, count(DISTINCT d1) AS two FROM TIMESTAMP_TBL;
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COMMIT;
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TRUNCATE TIMESTAMP_TBL;
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-- Special values
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INSERT INTO TIMESTAMP_TBL VALUES ('-infinity');
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INSERT INTO TIMESTAMP_TBL VALUES ('infinity');
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INSERT INTO TIMESTAMP_TBL VALUES ('epoch');
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SELECT timestamp 'infinity' = timestamp '+infinity' AS t;
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-- Postgres v6.0 standard output format
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INSERT INTO TIMESTAMP_TBL VALUES ('Mon Feb 10 17:32:01 1997 PST');
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-- Variations on Postgres v6.1 standard output format
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INSERT INTO TIMESTAMP_TBL VALUES ('Mon Feb 10 17:32:01.000001 1997 PST');
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INSERT INTO TIMESTAMP_TBL VALUES ('Mon Feb 10 17:32:01.999999 1997 PST');
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INSERT INTO TIMESTAMP_TBL VALUES ('Mon Feb 10 17:32:01.4 1997 PST');
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INSERT INTO TIMESTAMP_TBL VALUES ('Mon Feb 10 17:32:01.5 1997 PST');
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INSERT INTO TIMESTAMP_TBL VALUES ('Mon Feb 10 17:32:01.6 1997 PST');
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-- ISO 8601 format
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INSERT INTO TIMESTAMP_TBL VALUES ('1997-01-02');
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INSERT INTO TIMESTAMP_TBL VALUES ('1997-01-02 03:04:05');
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INSERT INTO TIMESTAMP_TBL VALUES ('1997-02-10 17:32:01-08');
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INSERT INTO TIMESTAMP_TBL VALUES ('1997-02-10 17:32:01-0800');
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INSERT INTO TIMESTAMP_TBL VALUES ('1997-02-10 17:32:01 -08:00');
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INSERT INTO TIMESTAMP_TBL VALUES ('19970210 173201 -0800');
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INSERT INTO TIMESTAMP_TBL VALUES ('1997-06-10 17:32:01 -07:00');
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INSERT INTO TIMESTAMP_TBL VALUES ('2001-09-22T18:19:20');
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-- POSIX format (note that the timezone abbrev is just decoration here)
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 08:14:01 GMT+8');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 13:14:02 GMT-1');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 12:14:03 GMT-2');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 03:14:04 PST+8');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 02:14:05 MST+7:00');
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-- Variations for acceptable input formats
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 10 17:32:01 1997 -0800');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 10 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 10 5:32PM 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('1997/02/10 17:32:01-0800');
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INSERT INTO TIMESTAMP_TBL VALUES ('1997-02-10 17:32:01 PST');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb-10-1997 17:32:01 PST');
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INSERT INTO TIMESTAMP_TBL VALUES ('02-10-1997 17:32:01 PST');
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INSERT INTO TIMESTAMP_TBL VALUES ('19970210 173201 PST');
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set datestyle to ymd;
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INSERT INTO TIMESTAMP_TBL VALUES ('97FEB10 5:32:01PM UTC');
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INSERT INTO TIMESTAMP_TBL VALUES ('97/02/10 17:32:01 UTC');
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reset datestyle;
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INSERT INTO TIMESTAMP_TBL VALUES ('1997.041 17:32:01 UTC');
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INSERT INTO TIMESTAMP_TBL VALUES ('19970210 173201 America/New_York');
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-- this fails (even though TZ is a no-op, we still look it up)
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INSERT INTO TIMESTAMP_TBL VALUES ('19970710 173201 America/Does_not_exist');
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-- Test non-error-throwing API
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SELECT pg_input_is_valid('now', 'timestamp');
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SELECT pg_input_is_valid('garbage', 'timestamp');
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SELECT pg_input_is_valid('2001-01-01 00:00 Nehwon/Lankhmar', 'timestamp');
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SELECT * FROM pg_input_error_info('garbage', 'timestamp');
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SELECT * FROM pg_input_error_info('2001-01-01 00:00 Nehwon/Lankhmar', 'timestamp');
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-- Check date conversion and date arithmetic
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INSERT INTO TIMESTAMP_TBL VALUES ('1997-06-10 18:32:01 PDT');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 10 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 11 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 12 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 13 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 14 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 15 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 0097 BC');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 0097');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 0597');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1097');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1697');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1797');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1897');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 2097');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 28 17:32:01 1996');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 29 17:32:01 1996');
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INSERT INTO TIMESTAMP_TBL VALUES ('Mar 01 17:32:01 1996');
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INSERT INTO TIMESTAMP_TBL VALUES ('Dec 30 17:32:01 1996');
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INSERT INTO TIMESTAMP_TBL VALUES ('Dec 31 17:32:01 1996');
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INSERT INTO TIMESTAMP_TBL VALUES ('Jan 01 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 28 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 29 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Mar 01 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Dec 30 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Dec 31 17:32:01 1997');
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INSERT INTO TIMESTAMP_TBL VALUES ('Dec 31 17:32:01 1999');
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INSERT INTO TIMESTAMP_TBL VALUES ('Jan 01 17:32:01 2000');
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INSERT INTO TIMESTAMP_TBL VALUES ('Dec 31 17:32:01 2000');
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INSERT INTO TIMESTAMP_TBL VALUES ('Jan 01 17:32:01 2001');
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-- Currently unsupported syntax and ranges
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 -0097');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 5097 BC');
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SELECT d1 FROM TIMESTAMP_TBL;
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-- Check behavior at the boundaries of the timestamp range
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SELECT '4714-11-24 00:00:00 BC'::timestamp;
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SELECT '4714-11-23 23:59:59 BC'::timestamp; -- out of range
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SELECT '294276-12-31 23:59:59'::timestamp;
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SELECT '294277-01-01 00:00:00'::timestamp; -- out of range
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-- Demonstrate functions and operators
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SELECT d1 FROM TIMESTAMP_TBL
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WHERE d1 > timestamp without time zone '1997-01-02';
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SELECT d1 FROM TIMESTAMP_TBL
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WHERE d1 < timestamp without time zone '1997-01-02';
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SELECT d1 FROM TIMESTAMP_TBL
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WHERE d1 = timestamp without time zone '1997-01-02';
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SELECT d1 FROM TIMESTAMP_TBL
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WHERE d1 != timestamp without time zone '1997-01-02';
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SELECT d1 FROM TIMESTAMP_TBL
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WHERE d1 <= timestamp without time zone '1997-01-02';
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SELECT d1 FROM TIMESTAMP_TBL
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WHERE d1 >= timestamp without time zone '1997-01-02';
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SELECT d1 - timestamp without time zone '1997-01-02' AS diff
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FROM TIMESTAMP_TBL WHERE d1 BETWEEN '1902-01-01' AND '2038-01-01';
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SELECT date_trunc( 'week', timestamp '2004-02-29 15:44:17.71393' ) AS week_trunc;
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-- verify date_bin behaves the same as date_trunc for relevant intervals
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-- case 1: AD dates, origin < input
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SELECT
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str,
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interval,
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date_trunc(str, ts) = date_bin(interval::interval, ts, timestamp '2001-01-01') AS equal
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FROM (
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VALUES
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('week', '7 d'),
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('day', '1 d'),
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('hour', '1 h'),
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('minute', '1 m'),
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('second', '1 s'),
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('millisecond', '1 ms'),
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('microsecond', '1 us')
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) intervals (str, interval),
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(VALUES (timestamp '2020-02-29 15:44:17.71393')) ts (ts);
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-- case 2: BC dates, origin < input
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SELECT
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str,
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interval,
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date_trunc(str, ts) = date_bin(interval::interval, ts, timestamp '2000-01-01 BC') AS equal
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FROM (
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VALUES
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('week', '7 d'),
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('day', '1 d'),
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('hour', '1 h'),
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('minute', '1 m'),
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('second', '1 s'),
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('millisecond', '1 ms'),
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('microsecond', '1 us')
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) intervals (str, interval),
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(VALUES (timestamp '0055-6-10 15:44:17.71393 BC')) ts (ts);
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-- case 3: AD dates, origin > input
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SELECT
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str,
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interval,
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date_trunc(str, ts) = date_bin(interval::interval, ts, timestamp '2020-03-02') AS equal
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FROM (
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VALUES
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('week', '7 d'),
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('day', '1 d'),
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('hour', '1 h'),
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('minute', '1 m'),
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('second', '1 s'),
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('millisecond', '1 ms'),
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('microsecond', '1 us')
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) intervals (str, interval),
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(VALUES (timestamp '2020-02-29 15:44:17.71393')) ts (ts);
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-- case 4: BC dates, origin > input
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SELECT
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str,
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interval,
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date_trunc(str, ts) = date_bin(interval::interval, ts, timestamp '0055-06-17 BC') AS equal
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FROM (
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VALUES
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('week', '7 d'),
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('day', '1 d'),
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('hour', '1 h'),
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('minute', '1 m'),
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('second', '1 s'),
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('millisecond', '1 ms'),
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('microsecond', '1 us')
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) intervals (str, interval),
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(VALUES (timestamp '0055-6-10 15:44:17.71393 BC')) ts (ts);
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-- bin timestamps into arbitrary intervals
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SELECT
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interval,
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ts,
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origin,
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date_bin(interval::interval, ts, origin)
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FROM (
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VALUES
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('15 days'),
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('2 hours'),
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('1 hour 30 minutes'),
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('15 minutes'),
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('10 seconds'),
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('100 milliseconds'),
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('250 microseconds')
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) intervals (interval),
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(VALUES (timestamp '2020-02-11 15:44:17.71393')) ts (ts),
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(VALUES (timestamp '2001-01-01')) origin (origin);
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-- shift bins using the origin parameter:
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SELECT date_bin('5 min'::interval, timestamp '2020-02-01 01:01:01', timestamp '2020-02-01 00:02:30');
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-- disallow intervals with months or years
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SELECT date_bin('5 months'::interval, timestamp '2020-02-01 01:01:01', timestamp '2001-01-01');
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SELECT date_bin('5 years'::interval, timestamp '2020-02-01 01:01:01', timestamp '2001-01-01');
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-- disallow zero intervals
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SELECT date_bin('0 days'::interval, timestamp '1970-01-01 01:00:00' , timestamp '1970-01-01 00:00:00');
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-- disallow negative intervals
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SELECT date_bin('-2 days'::interval, timestamp '1970-01-01 01:00:00' , timestamp '1970-01-01 00:00:00');
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-- Test casting within a BETWEEN qualifier
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SELECT d1 - timestamp without time zone '1997-01-02' AS diff
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FROM TIMESTAMP_TBL
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WHERE d1 BETWEEN timestamp without time zone '1902-01-01'
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AND timestamp without time zone '2038-01-01';
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-- DATE_PART (timestamp_part)
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SELECT d1 as "timestamp",
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date_part( 'year', d1) AS year, date_part( 'month', d1) AS month,
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date_part( 'day', d1) AS day, date_part( 'hour', d1) AS hour,
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date_part( 'minute', d1) AS minute, date_part( 'second', d1) AS second
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FROM TIMESTAMP_TBL;
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SELECT d1 as "timestamp",
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date_part( 'quarter', d1) AS quarter, date_part( 'msec', d1) AS msec,
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date_part( 'usec', d1) AS usec
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FROM TIMESTAMP_TBL;
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SELECT d1 as "timestamp",
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date_part( 'isoyear', d1) AS isoyear, date_part( 'week', d1) AS week,
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date_part( 'isodow', d1) AS isodow, date_part( 'dow', d1) AS dow,
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date_part( 'doy', d1) AS doy
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FROM TIMESTAMP_TBL;
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SELECT d1 as "timestamp",
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date_part( 'decade', d1) AS decade,
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date_part( 'century', d1) AS century,
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date_part( 'millennium', d1) AS millennium,
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round(date_part( 'julian', d1)) AS julian,
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date_part( 'epoch', d1) AS epoch
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FROM TIMESTAMP_TBL;
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-- extract implementation is mostly the same as date_part, so only
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-- test a few cases for additional coverage.
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SELECT d1 as "timestamp",
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extract(microseconds from d1) AS microseconds,
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extract(milliseconds from d1) AS milliseconds,
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extract(seconds from d1) AS seconds,
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round(extract(julian from d1)) AS julian,
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extract(epoch from d1) AS epoch
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FROM TIMESTAMP_TBL;
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-- value near upper bound uses special case in code
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SELECT date_part('epoch', '294270-01-01 00:00:00'::timestamp);
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SELECT extract(epoch from '294270-01-01 00:00:00'::timestamp);
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-- another internal overflow test case
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SELECT extract(epoch from '5000-01-01 00:00:00'::timestamp);
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-- test edge-case overflow in timestamp subtraction
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SELECT timestamp '294276-12-31 23:59:59' - timestamp '1999-12-23 19:59:04.224193' AS ok;
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SELECT timestamp '294276-12-31 23:59:59' - timestamp '1999-12-23 19:59:04.224192' AS overflows;
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-- TO_CHAR()
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SELECT to_char(d1, 'DAY Day day DY Dy dy MONTH Month month RM MON Mon mon')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, 'FMDAY FMDay FMday FMMONTH FMMonth FMmonth FMRM')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, 'Y,YYY YYYY YYY YY Y CC Q MM WW DDD DD D J')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, 'FMY,YYY FMYYYY FMYYY FMYY FMY FMCC FMQ FMMM FMWW FMDDD FMDD FMD FMJ')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, 'HH HH12 HH24 MI SS SSSS')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, E'"HH:MI:SS is" HH:MI:SS "\\"text between quote marks\\""')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, 'HH24--text--MI--text--SS')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, 'YYYYTH YYYYth Jth')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, 'YYYY A.D. YYYY a.d. YYYY bc HH:MI:SS P.M. HH:MI:SS p.m. HH:MI:SS pm')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, 'IYYY IYY IY I IW IDDD ID')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d1, 'FMIYYY FMIYY FMIY FMI FMIW FMIDDD FMID')
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FROM TIMESTAMP_TBL;
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SELECT to_char(d, 'FF1 FF2 FF3 FF4 FF5 FF6 ff1 ff2 ff3 ff4 ff5 ff6 MS US')
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FROM (VALUES
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('2018-11-02 12:34:56'::timestamp),
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('2018-11-02 12:34:56.78'),
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('2018-11-02 12:34:56.78901'),
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('2018-11-02 12:34:56.78901234')
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) d(d);
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-- Roman months, with upper and lower case.
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SELECT i,
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to_char(i * interval '1mon', 'rm'),
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to_char(i * interval '1mon', 'RM')
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FROM generate_series(-13, 13) i;
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-- timestamp numeric fields constructor
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SELECT make_timestamp(2014, 12, 28, 6, 30, 45.887);
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SELECT make_timestamp(-44, 3, 15, 12, 30, 15);
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-- should fail
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select make_timestamp(0, 7, 15, 12, 30, 15);
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-- generate_series for timestamp
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select * from generate_series('2020-01-01 00:00'::timestamp,
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'2020-01-02 03:00'::timestamp,
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'1 hour'::interval);
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-- the LIMIT should allow this to terminate in a reasonable amount of time
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-- (but that unfortunately doesn't work yet for SELECT * FROM ...)
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select generate_series('2022-01-01 00:00'::timestamp,
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'infinity'::timestamp,
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'1 month'::interval) limit 10;
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-- errors
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select * from generate_series('2020-01-01 00:00'::timestamp,
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'2020-01-02 03:00'::timestamp,
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'0 hour'::interval);
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select generate_series(timestamp '1995-08-06 12:12:12', timestamp '1996-08-06 12:12:12', interval 'infinity');
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select generate_series(timestamp '1995-08-06 12:12:12', timestamp '1996-08-06 12:12:12', interval '-infinity');
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-- test arithmetic with infinite timestamps
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select timestamp 'infinity' - timestamp 'infinity';
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select timestamp 'infinity' - timestamp '-infinity';
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select timestamp '-infinity' - timestamp 'infinity';
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select timestamp '-infinity' - timestamp '-infinity';
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select timestamp 'infinity' - timestamp '1995-08-06 12:12:12';
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select timestamp '-infinity' - timestamp '1995-08-06 12:12:12';
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-- test age() with infinite timestamps
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select age(timestamp 'infinity');
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select age(timestamp '-infinity');
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select age(timestamp 'infinity', timestamp 'infinity');
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select age(timestamp 'infinity', timestamp '-infinity');
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select age(timestamp '-infinity', timestamp 'infinity');
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select age(timestamp '-infinity', timestamp '-infinity');
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