postgresql/src/test/regress/expected/date.out

--
-- DATE
--
CREATE TABLE DATE_TBL (f1 date);
INSERT INTO DATE_TBL VALUES ('1957-04-09');
INSERT INTO DATE_TBL VALUES ('1957-06-13');
INSERT INTO DATE_TBL VALUES ('1996-02-28');
INSERT INTO DATE_TBL VALUES ('1996-02-29');
INSERT INTO DATE_TBL VALUES ('1996-03-01');
INSERT INTO DATE_TBL VALUES ('1996-03-02');
INSERT INTO DATE_TBL VALUES ('1997-02-28');
INSERT INTO DATE_TBL VALUES ('1997-02-29');
ERROR:  date/time field value out of range: "1997-02-29"
LINE 1: INSERT INTO DATE_TBL VALUES ('1997-02-29');
                                     ^
INSERT INTO DATE_TBL VALUES ('1997-03-01');
INSERT INTO DATE_TBL VALUES ('1997-03-02');
INSERT INTO DATE_TBL VALUES ('2000-04-01');
INSERT INTO DATE_TBL VALUES ('2000-04-02');
INSERT INTO DATE_TBL VALUES ('2000-04-03');
INSERT INTO DATE_TBL VALUES ('2038-04-08');
INSERT INTO DATE_TBL VALUES ('2039-04-09');
INSERT INTO DATE_TBL VALUES ('2040-04-10');
INSERT INTO DATE_TBL VALUES ('2040-04-10 BC');
SELECT f1 FROM DATE_TBL;
      f1       
---------------
 04-09-1957
 06-13-1957
 02-28-1996
 02-29-1996
 03-01-1996
 03-02-1996
 02-28-1997
 03-01-1997
 03-02-1997
 04-01-2000
 04-02-2000
 04-03-2000
 04-08-2038
 04-09-2039
 04-10-2040
 04-10-2040 BC
(16 rows)

SELECT f1 FROM DATE_TBL WHERE f1 < '2000-01-01';
      f1       
---------------
 04-09-1957
 06-13-1957
 02-28-1996
 02-29-1996
 03-01-1996
 03-02-1996
 02-28-1997
 03-01-1997
 03-02-1997
 04-10-2040 BC
(10 rows)

SELECT f1 FROM DATE_TBL
  WHERE f1 BETWEEN '2000-01-01' AND '2001-01-01';
     f1     
------------
 04-01-2000
 04-02-2000
 04-03-2000
(3 rows)

--
-- Check all the documented input formats
--
SET datestyle TO iso;  -- display results in ISO
SET datestyle TO ymd;
SELECT date 'January 8, 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999-01-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999-01-18';
    date    
------------
 1999-01-18
(1 row)

SELECT date '1/8/1999';
ERROR:  date/time field value out of range: "1/8/1999"
LINE 1: SELECT date '1/8/1999';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1/18/1999';
ERROR:  date/time field value out of range: "1/18/1999"
LINE 1: SELECT date '1/18/1999';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '18/1/1999';
ERROR:  date/time field value out of range: "18/1/1999"
LINE 1: SELECT date '18/1/1999';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '01/02/03';
    date    
------------
 2001-02-03
(1 row)

SELECT date '19990108';
    date    
------------
 1999-01-08
(1 row)

SELECT date '990108';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999.008';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'J2451187';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'January 8, 99 BC';
ERROR:  date/time field value out of range: "January 8, 99 BC"
LINE 1: SELECT date 'January 8, 99 BC';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '99-Jan-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999-Jan-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08-Jan-99';
ERROR:  date/time field value out of range: "08-Jan-99"
LINE 1: SELECT date '08-Jan-99';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '08-Jan-1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan-08-99';
ERROR:  date/time field value out of range: "Jan-08-99"
LINE 1: SELECT date 'Jan-08-99';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date 'Jan-08-1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99-08-Jan';
ERROR:  invalid input syntax for type date: "99-08-Jan"
LINE 1: SELECT date '99-08-Jan';
                    ^
SELECT date '1999-08-Jan';
ERROR:  invalid input syntax for type date: "1999-08-Jan"
LINE 1: SELECT date '1999-08-Jan';
                    ^
SELECT date '99 Jan 08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999 Jan 08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08 Jan 99';
ERROR:  date/time field value out of range: "08 Jan 99"
LINE 1: SELECT date '08 Jan 99';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '08 Jan 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan 08 99';
ERROR:  date/time field value out of range: "Jan 08 99"
LINE 1: SELECT date 'Jan 08 99';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date 'Jan 08 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99 08 Jan';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999 08 Jan';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99-01-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999-01-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08-01-99';
ERROR:  date/time field value out of range: "08-01-99"
LINE 1: SELECT date '08-01-99';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '08-01-1999';
ERROR:  date/time field value out of range: "08-01-1999"
LINE 1: SELECT date '08-01-1999';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '01-08-99';
ERROR:  date/time field value out of range: "01-08-99"
LINE 1: SELECT date '01-08-99';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '01-08-1999';
ERROR:  date/time field value out of range: "01-08-1999"
LINE 1: SELECT date '01-08-1999';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '99-08-01';
    date    
------------
 1999-08-01
(1 row)

SELECT date '1999-08-01';
    date    
------------
 1999-08-01
(1 row)

SELECT date '99 01 08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999 01 08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08 01 99';
ERROR:  date/time field value out of range: "08 01 99"
LINE 1: SELECT date '08 01 99';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '08 01 1999';
ERROR:  date/time field value out of range: "08 01 1999"
LINE 1: SELECT date '08 01 1999';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '01 08 99';
ERROR:  date/time field value out of range: "01 08 99"
LINE 1: SELECT date '01 08 99';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '01 08 1999';
ERROR:  date/time field value out of range: "01 08 1999"
LINE 1: SELECT date '01 08 1999';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '99 08 01';
    date    
------------
 1999-08-01
(1 row)

SELECT date '1999 08 01';
    date    
------------
 1999-08-01
(1 row)

SET datestyle TO dmy;
SELECT date 'January 8, 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999-01-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999-01-18';
    date    
------------
 1999-01-18
(1 row)

SELECT date '1/8/1999';
    date    
------------
 1999-08-01
(1 row)

SELECT date '1/18/1999';
ERROR:  date/time field value out of range: "1/18/1999"
LINE 1: SELECT date '1/18/1999';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '18/1/1999';
    date    
------------
 1999-01-18
(1 row)

SELECT date '01/02/03';
    date    
------------
 2003-02-01
(1 row)

SELECT date '19990108';
    date    
------------
 1999-01-08
(1 row)

SELECT date '990108';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999.008';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'J2451187';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'January 8, 99 BC';
     date      
---------------
 0099-01-08 BC
(1 row)

SELECT date '99-Jan-08';
ERROR:  date/time field value out of range: "99-Jan-08"
LINE 1: SELECT date '99-Jan-08';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999-Jan-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08-Jan-99';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08-Jan-1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan-08-99';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan-08-1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99-08-Jan';
ERROR:  invalid input syntax for type date: "99-08-Jan"
LINE 1: SELECT date '99-08-Jan';
                    ^
SELECT date '1999-08-Jan';
ERROR:  invalid input syntax for type date: "1999-08-Jan"
LINE 1: SELECT date '1999-08-Jan';
                    ^
SELECT date '99 Jan 08';
ERROR:  date/time field value out of range: "99 Jan 08"
LINE 1: SELECT date '99 Jan 08';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999 Jan 08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08 Jan 99';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08 Jan 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan 08 99';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan 08 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99 08 Jan';
ERROR:  invalid input syntax for type date: "99 08 Jan"
LINE 1: SELECT date '99 08 Jan';
                    ^
SELECT date '1999 08 Jan';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99-01-08';
ERROR:  date/time field value out of range: "99-01-08"
LINE 1: SELECT date '99-01-08';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999-01-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08-01-99';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08-01-1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '01-08-99';
    date    
------------
 1999-08-01
(1 row)

SELECT date '01-08-1999';
    date    
------------
 1999-08-01
(1 row)

SELECT date '99-08-01';
ERROR:  date/time field value out of range: "99-08-01"
LINE 1: SELECT date '99-08-01';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999-08-01';
    date    
------------
 1999-08-01
(1 row)

SELECT date '99 01 08';
ERROR:  date/time field value out of range: "99 01 08"
LINE 1: SELECT date '99 01 08';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999 01 08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08 01 99';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08 01 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '01 08 99';
    date    
------------
 1999-08-01
(1 row)

SELECT date '01 08 1999';
    date    
------------
 1999-08-01
(1 row)

SELECT date '99 08 01';
ERROR:  date/time field value out of range: "99 08 01"
LINE 1: SELECT date '99 08 01';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999 08 01';
    date    
------------
 1999-08-01
(1 row)

SET datestyle TO mdy;
SELECT date 'January 8, 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999-01-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999-01-18';
    date    
------------
 1999-01-18
(1 row)

SELECT date '1/8/1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1/18/1999';
    date    
------------
 1999-01-18
(1 row)

SELECT date '18/1/1999';
ERROR:  date/time field value out of range: "18/1/1999"
LINE 1: SELECT date '18/1/1999';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '01/02/03';
    date    
------------
 2003-01-02
(1 row)

SELECT date '19990108';
    date    
------------
 1999-01-08
(1 row)

SELECT date '990108';
    date    
------------
 1999-01-08
(1 row)

SELECT date '1999.008';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'J2451187';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'January 8, 99 BC';
     date      
---------------
 0099-01-08 BC
(1 row)

SELECT date '99-Jan-08';
ERROR:  date/time field value out of range: "99-Jan-08"
LINE 1: SELECT date '99-Jan-08';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999-Jan-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08-Jan-99';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08-Jan-1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan-08-99';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan-08-1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99-08-Jan';
ERROR:  invalid input syntax for type date: "99-08-Jan"
LINE 1: SELECT date '99-08-Jan';
                    ^
SELECT date '1999-08-Jan';
ERROR:  invalid input syntax for type date: "1999-08-Jan"
LINE 1: SELECT date '1999-08-Jan';
                    ^
SELECT date '99 Jan 08';
ERROR:  invalid input syntax for type date: "99 Jan 08"
LINE 1: SELECT date '99 Jan 08';
                    ^
SELECT date '1999 Jan 08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08 Jan 99';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08 Jan 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan 08 99';
    date    
------------
 1999-01-08
(1 row)

SELECT date 'Jan 08 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99 08 Jan';
ERROR:  invalid input syntax for type date: "99 08 Jan"
LINE 1: SELECT date '99 08 Jan';
                    ^
SELECT date '1999 08 Jan';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99-01-08';
ERROR:  date/time field value out of range: "99-01-08"
LINE 1: SELECT date '99-01-08';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999-01-08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08-01-99';
    date    
------------
 1999-08-01
(1 row)

SELECT date '08-01-1999';
    date    
------------
 1999-08-01
(1 row)

SELECT date '01-08-99';
    date    
------------
 1999-01-08
(1 row)

SELECT date '01-08-1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99-08-01';
ERROR:  date/time field value out of range: "99-08-01"
LINE 1: SELECT date '99-08-01';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999-08-01';
    date    
------------
 1999-08-01
(1 row)

SELECT date '99 01 08';
ERROR:  date/time field value out of range: "99 01 08"
LINE 1: SELECT date '99 01 08';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999 01 08';
    date    
------------
 1999-01-08
(1 row)

SELECT date '08 01 99';
    date    
------------
 1999-08-01
(1 row)

SELECT date '08 01 1999';
    date    
------------
 1999-08-01
(1 row)

SELECT date '01 08 99';
    date    
------------
 1999-01-08
(1 row)

SELECT date '01 08 1999';
    date    
------------
 1999-01-08
(1 row)

SELECT date '99 08 01';
ERROR:  date/time field value out of range: "99 08 01"
LINE 1: SELECT date '99 08 01';
                    ^
HINT:  Perhaps you need a different "datestyle" setting.
SELECT date '1999 08 01';
    date    
------------
 1999-08-01
(1 row)

-- Check upper and lower limits of date range
SELECT date '4714-11-24 BC';
     date      
---------------
 4714-11-24 BC
(1 row)

SELECT date '4714-11-23 BC';  -- out of range
ERROR:  date out of range: "4714-11-23 BC"
LINE 1: SELECT date '4714-11-23 BC';
                    ^
SELECT date '5874897-12-31';
     date      
---------------
 5874897-12-31
(1 row)

SELECT date '5874898-01-01';  -- out of range
ERROR:  date out of range: "5874898-01-01"
LINE 1: SELECT date '5874898-01-01';
                    ^
-- Test non-error-throwing API
SELECT pg_input_is_valid('now', 'date');
 pg_input_is_valid 
-------------------
 t
(1 row)

SELECT pg_input_is_valid('garbage', 'date');
 pg_input_is_valid 
-------------------
 f
(1 row)

SELECT pg_input_is_valid('6874898-01-01', 'date');
 pg_input_is_valid 
-------------------
 f
(1 row)

SELECT * FROM pg_input_error_info('garbage', 'date');
                    message                    | detail | hint | sql_error_code 
-----------------------------------------------+--------+------+----------------
 invalid input syntax for type date: "garbage" |        |      | 22007
(1 row)

SELECT * FROM pg_input_error_info('6874898-01-01', 'date');
              message               | detail | hint | sql_error_code 
------------------------------------+--------+------+----------------
 date out of range: "6874898-01-01" |        |      | 22008
(1 row)

RESET datestyle;
--
-- Simple math
-- Leave most of it for the horology tests
--
SELECT f1 - date '2000-01-01' AS "Days From 2K" FROM DATE_TBL;
 Days From 2K 
--------------
       -15607
       -15542
        -1403
        -1402
        -1401
        -1400
        -1037
        -1036
        -1035
           91
           92
           93
        13977
        14343
        14710
     -1475115
(16 rows)

SELECT f1 - date 'epoch' AS "Days From Epoch" FROM DATE_TBL;
 Days From Epoch 
-----------------
           -4650
           -4585
            9554
            9555
            9556
            9557
            9920
            9921
            9922
           11048
           11049
           11050
           24934
           25300
           25667
        -1464158
(16 rows)

SELECT date 'yesterday' - date 'today' AS "One day";
 One day 
---------
      -1
(1 row)

SELECT date 'today' - date 'tomorrow' AS "One day";
 One day 
---------
      -1
(1 row)

SELECT date 'yesterday' - date 'tomorrow' AS "Two days";
 Two days 
----------
       -2
(1 row)

SELECT date 'tomorrow' - date 'today' AS "One day";
 One day 
---------
       1
(1 row)

SELECT date 'today' - date 'yesterday' AS "One day";
 One day 
---------
       1
(1 row)

SELECT date 'tomorrow' - date 'yesterday' AS "Two days";
 Two days 
----------
        2
(1 row)

--
-- test extract!
--
SELECT f1 as "date",
    date_part('year', f1) AS year,
    date_part('month', f1) AS month,
    date_part('day', f1) AS day,
    date_part('quarter', f1) AS quarter,
    date_part('decade', f1) AS decade,
    date_part('century', f1) AS century,
    date_part('millennium', f1) AS millennium,
    date_part('isoyear', f1) AS isoyear,
    date_part('week', f1) AS week,
    date_part('dow', f1) AS dow,
    date_part('isodow', f1) AS isodow,
    date_part('doy', f1) AS doy,
    date_part('julian', f1) AS julian,
    date_part('epoch', f1) AS epoch
    FROM date_tbl;
     date      | year  | month | day | quarter | decade | century | millennium | isoyear | week | dow | isodow | doy | julian  |     epoch     
---------------+-------+-------+-----+---------+--------+---------+------------+---------+------+-----+--------+-----+---------+---------------
 04-09-1957    |  1957 |     4 |   9 |       2 |    195 |      20 |          2 |    1957 |   15 |   2 |      2 |  99 | 2435938 |    -401760000
 06-13-1957    |  1957 |     6 |  13 |       2 |    195 |      20 |          2 |    1957 |   24 |   4 |      4 | 164 | 2436003 |    -396144000
 02-28-1996    |  1996 |     2 |  28 |       1 |    199 |      20 |          2 |    1996 |    9 |   3 |      3 |  59 | 2450142 |     825465600
 02-29-1996    |  1996 |     2 |  29 |       1 |    199 |      20 |          2 |    1996 |    9 |   4 |      4 |  60 | 2450143 |     825552000
 03-01-1996    |  1996 |     3 |   1 |       1 |    199 |      20 |          2 |    1996 |    9 |   5 |      5 |  61 | 2450144 |     825638400
 03-02-1996    |  1996 |     3 |   2 |       1 |    199 |      20 |          2 |    1996 |    9 |   6 |      6 |  62 | 2450145 |     825724800
 02-28-1997    |  1997 |     2 |  28 |       1 |    199 |      20 |          2 |    1997 |    9 |   5 |      5 |  59 | 2450508 |     857088000
 03-01-1997    |  1997 |     3 |   1 |       1 |    199 |      20 |          2 |    1997 |    9 |   6 |      6 |  60 | 2450509 |     857174400
 03-02-1997    |  1997 |     3 |   2 |       1 |    199 |      20 |          2 |    1997 |    9 |   0 |      7 |  61 | 2450510 |     857260800
 04-01-2000    |  2000 |     4 |   1 |       2 |    200 |      20 |          2 |    2000 |   13 |   6 |      6 |  92 | 2451636 |     954547200
 04-02-2000    |  2000 |     4 |   2 |       2 |    200 |      20 |          2 |    2000 |   13 |   0 |      7 |  93 | 2451637 |     954633600
 04-03-2000    |  2000 |     4 |   3 |       2 |    200 |      20 |          2 |    2000 |   14 |   1 |      1 |  94 | 2451638 |     954720000
 04-08-2038    |  2038 |     4 |   8 |       2 |    203 |      21 |          3 |    2038 |   14 |   4 |      4 |  98 | 2465522 |    2154297600
 04-09-2039    |  2039 |     4 |   9 |       2 |    203 |      21 |          3 |    2039 |   14 |   6 |      6 |  99 | 2465888 |    2185920000
 04-10-2040    |  2040 |     4 |  10 |       2 |    204 |      21 |          3 |    2040 |   15 |   2 |      2 | 101 | 2466255 |    2217628800
 04-10-2040 BC | -2040 |     4 |  10 |       2 |   -204 |     -21 |         -3 |   -2040 |   15 |   1 |      1 | 100 |  976430 | -126503251200
(16 rows)

--
-- epoch
--
SELECT EXTRACT(EPOCH FROM DATE        '1970-01-01');     --  0
 extract 
---------
       0
(1 row)

--
-- century
--
SELECT EXTRACT(CENTURY FROM DATE '0101-12-31 BC'); -- -2
 extract 
---------
      -2
(1 row)

SELECT EXTRACT(CENTURY FROM DATE '0100-12-31 BC'); -- -1
 extract 
---------
      -1
(1 row)

SELECT EXTRACT(CENTURY FROM DATE '0001-12-31 BC'); -- -1
 extract 
---------
      -1
(1 row)

SELECT EXTRACT(CENTURY FROM DATE '0001-01-01');    --  1
 extract 
---------
       1
(1 row)

SELECT EXTRACT(CENTURY FROM DATE '0001-01-01 AD'); --  1
 extract 
---------
       1
(1 row)

SELECT EXTRACT(CENTURY FROM DATE '1900-12-31');    -- 19
 extract 
---------
      19
(1 row)

SELECT EXTRACT(CENTURY FROM DATE '1901-01-01');    -- 20
 extract 
---------
      20
(1 row)

SELECT EXTRACT(CENTURY FROM DATE '2000-12-31');    -- 20
 extract 
---------
      20
(1 row)

SELECT EXTRACT(CENTURY FROM DATE '2001-01-01');    -- 21
 extract 
---------
      21
(1 row)

SELECT EXTRACT(CENTURY FROM CURRENT_DATE)>=21 AS True;     -- true
 true 
------
 t
(1 row)

--
-- millennium
--
SELECT EXTRACT(MILLENNIUM FROM DATE '0001-12-31 BC'); -- -1
 extract 
---------
      -1
(1 row)

SELECT EXTRACT(MILLENNIUM FROM DATE '0001-01-01 AD'); --  1
 extract 
---------
       1
(1 row)

SELECT EXTRACT(MILLENNIUM FROM DATE '1000-12-31');    --  1
 extract 
---------
       1
(1 row)

SELECT EXTRACT(MILLENNIUM FROM DATE '1001-01-01');    --  2
 extract 
---------
       2
(1 row)

SELECT EXTRACT(MILLENNIUM FROM DATE '2000-12-31');    --  2
 extract 
---------
       2
(1 row)

SELECT EXTRACT(MILLENNIUM FROM DATE '2001-01-01');    --  3
 extract 
---------
       3
(1 row)

-- next test to be fixed on the turn of the next millennium;-)
SELECT EXTRACT(MILLENNIUM FROM CURRENT_DATE);         --  3
 extract 
---------
       3
(1 row)

--
-- decade
--
SELECT EXTRACT(DECADE FROM DATE '1994-12-25');    -- 199
 extract 
---------
     199
(1 row)

SELECT EXTRACT(DECADE FROM DATE '0010-01-01');    --   1
 extract 
---------
       1
(1 row)

SELECT EXTRACT(DECADE FROM DATE '0009-12-31');    --   0
 extract 
---------
       0
(1 row)

SELECT EXTRACT(DECADE FROM DATE '0001-01-01 BC'); --   0
 extract 
---------
       0
(1 row)

SELECT EXTRACT(DECADE FROM DATE '0002-12-31 BC'); --  -1
 extract 
---------
      -1
(1 row)

SELECT EXTRACT(DECADE FROM DATE '0011-01-01 BC'); --  -1
 extract 
---------
      -1
(1 row)

SELECT EXTRACT(DECADE FROM DATE '0012-12-31 BC'); --  -2
 extract 
---------
      -2
(1 row)

--
-- all possible fields
--
SELECT EXTRACT(MICROSECONDS  FROM DATE '2020-08-11');
ERROR:  unit "microseconds" not supported for type date
SELECT EXTRACT(MILLISECONDS  FROM DATE '2020-08-11');
ERROR:  unit "milliseconds" not supported for type date
SELECT EXTRACT(SECOND        FROM DATE '2020-08-11');
ERROR:  unit "second" not supported for type date
SELECT EXTRACT(MINUTE        FROM DATE '2020-08-11');
ERROR:  unit "minute" not supported for type date
SELECT EXTRACT(HOUR          FROM DATE '2020-08-11');
ERROR:  unit "hour" not supported for type date
SELECT EXTRACT(DAY           FROM DATE '2020-08-11');
 extract 
---------
      11
(1 row)

SELECT EXTRACT(MONTH         FROM DATE '2020-08-11');
 extract 
---------
       8
(1 row)

SELECT EXTRACT(YEAR          FROM DATE '2020-08-11');
 extract 
---------
    2020
(1 row)

SELECT EXTRACT(YEAR          FROM DATE '2020-08-11 BC');
 extract 
---------
   -2020
(1 row)

SELECT EXTRACT(DECADE        FROM DATE '2020-08-11');
 extract 
---------
     202
(1 row)

SELECT EXTRACT(CENTURY       FROM DATE '2020-08-11');
 extract 
---------
      21
(1 row)

SELECT EXTRACT(MILLENNIUM    FROM DATE '2020-08-11');
 extract 
---------
       3
(1 row)

SELECT EXTRACT(ISOYEAR       FROM DATE '2020-08-11');
 extract 
---------
    2020
(1 row)

SELECT EXTRACT(ISOYEAR       FROM DATE '2020-08-11 BC');
 extract 
---------
   -2020
(1 row)

SELECT EXTRACT(QUARTER       FROM DATE '2020-08-11');
 extract 
---------
       3
(1 row)

SELECT EXTRACT(WEEK          FROM DATE '2020-08-11');
 extract 
---------
      33
(1 row)

SELECT EXTRACT(DOW           FROM DATE '2020-08-11');
 extract 
---------
       2
(1 row)

SELECT EXTRACT(DOW           FROM DATE '2020-08-16');
 extract 
---------
       0
(1 row)

SELECT EXTRACT(ISODOW        FROM DATE '2020-08-11');
 extract 
---------
       2
(1 row)

SELECT EXTRACT(ISODOW        FROM DATE '2020-08-16');
 extract 
---------
       7
(1 row)

SELECT EXTRACT(DOY           FROM DATE '2020-08-11');
 extract 
---------
     224
(1 row)

SELECT EXTRACT(TIMEZONE      FROM DATE '2020-08-11');
ERROR:  unit "timezone" not supported for type date
SELECT EXTRACT(TIMEZONE_M    FROM DATE '2020-08-11');
ERROR:  unit "timezone_m" not supported for type date
SELECT EXTRACT(TIMEZONE_H    FROM DATE '2020-08-11');
ERROR:  unit "timezone_h" not supported for type date
SELECT EXTRACT(EPOCH         FROM DATE '2020-08-11');
  extract   
------------
 1597104000
(1 row)

SELECT EXTRACT(JULIAN        FROM DATE '2020-08-11');
 extract 
---------
 2459073
(1 row)

--
-- test trunc function!
--
SELECT DATE_TRUNC('MILLENNIUM', TIMESTAMP '1970-03-20 04:30:00.00000'); -- 1001
        date_trunc        
--------------------------
 Thu Jan 01 00:00:00 1001
(1 row)

SELECT DATE_TRUNC('MILLENNIUM', DATE '1970-03-20'); -- 1001-01-01
          date_trunc          
------------------------------
 Thu Jan 01 00:00:00 1001 PST
(1 row)

SELECT DATE_TRUNC('CENTURY', TIMESTAMP '1970-03-20 04:30:00.00000'); -- 1901
        date_trunc        
--------------------------
 Tue Jan 01 00:00:00 1901
(1 row)

SELECT DATE_TRUNC('CENTURY', DATE '1970-03-20'); -- 1901
          date_trunc          
------------------------------
 Tue Jan 01 00:00:00 1901 PST
(1 row)

SELECT DATE_TRUNC('CENTURY', DATE '2004-08-10'); -- 2001-01-01
          date_trunc          
------------------------------
 Mon Jan 01 00:00:00 2001 PST
(1 row)

SELECT DATE_TRUNC('CENTURY', DATE '0002-02-04'); -- 0001-01-01
          date_trunc          
------------------------------
 Mon Jan 01 00:00:00 0001 PST
(1 row)

SELECT DATE_TRUNC('CENTURY', DATE '0055-08-10 BC'); -- 0100-01-01 BC
           date_trunc            
---------------------------------
 Tue Jan 01 00:00:00 0100 PST BC
(1 row)

SELECT DATE_TRUNC('DECADE', DATE '1993-12-25'); -- 1990-01-01
          date_trunc          
------------------------------
 Mon Jan 01 00:00:00 1990 PST
(1 row)

SELECT DATE_TRUNC('DECADE', DATE '0004-12-25'); -- 0001-01-01 BC
           date_trunc            
---------------------------------
 Sat Jan 01 00:00:00 0001 PST BC
(1 row)

SELECT DATE_TRUNC('DECADE', DATE '0002-12-31 BC'); -- 0011-01-01 BC
           date_trunc            
---------------------------------
 Mon Jan 01 00:00:00 0011 PST BC
(1 row)

--
-- test infinity
--
select 'infinity'::date, '-infinity'::date;
   date   |   date    
----------+-----------
 infinity | -infinity
(1 row)

select 'infinity'::date > 'today'::date as t;
 t 
---
 t
(1 row)

select '-infinity'::date < 'today'::date as t;
 t 
---
 t
(1 row)

select isfinite('infinity'::date), isfinite('-infinity'::date), isfinite('today'::date);
 isfinite | isfinite | isfinite 
----------+----------+----------
 f        | f        | t
(1 row)

select 'infinity'::date = '+infinity'::date as t;
 t 
---
 t
(1 row)

--
-- oscillating fields from non-finite date:
--
SELECT EXTRACT(DAY FROM DATE 'infinity');      -- NULL
 extract 
---------
        
(1 row)

SELECT EXTRACT(DAY FROM DATE '-infinity');     -- NULL
 extract 
---------
        
(1 row)

-- all supported fields
SELECT EXTRACT(DAY           FROM DATE 'infinity');    -- NULL
 extract 
---------
        
(1 row)

SELECT EXTRACT(MONTH         FROM DATE 'infinity');    -- NULL
 extract 
---------
        
(1 row)

SELECT EXTRACT(QUARTER       FROM DATE 'infinity');    -- NULL
 extract 
---------
        
(1 row)

SELECT EXTRACT(WEEK          FROM DATE 'infinity');    -- NULL
 extract 
---------
        
(1 row)

SELECT EXTRACT(DOW           FROM DATE 'infinity');    -- NULL
 extract 
---------
        
(1 row)

SELECT EXTRACT(ISODOW        FROM DATE 'infinity');    -- NULL
 extract 
---------
        
(1 row)

SELECT EXTRACT(DOY           FROM DATE 'infinity');    -- NULL
 extract 
---------
        
(1 row)

--
-- monotonic fields from non-finite date:
--
SELECT EXTRACT(EPOCH FROM DATE 'infinity');         --  Infinity
 extract  
----------
 Infinity
(1 row)

SELECT EXTRACT(EPOCH FROM DATE '-infinity');        -- -Infinity
  extract  
-----------
 -Infinity
(1 row)

-- all supported fields
SELECT EXTRACT(YEAR       FROM DATE 'infinity');    --  Infinity
 extract  
----------
 Infinity
(1 row)

SELECT EXTRACT(DECADE     FROM DATE 'infinity');    --  Infinity
 extract  
----------
 Infinity
(1 row)

SELECT EXTRACT(CENTURY    FROM DATE 'infinity');    --  Infinity
 extract  
----------
 Infinity
(1 row)

SELECT EXTRACT(MILLENNIUM FROM DATE 'infinity');    --  Infinity
 extract  
----------
 Infinity
(1 row)

SELECT EXTRACT(JULIAN     FROM DATE 'infinity');    --  Infinity
 extract  
----------
 Infinity
(1 row)

SELECT EXTRACT(ISOYEAR    FROM DATE 'infinity');    --  Infinity
 extract  
----------
 Infinity
(1 row)

SELECT EXTRACT(EPOCH      FROM DATE 'infinity');    --  Infinity
 extract  
----------
 Infinity
(1 row)

--
-- wrong fields from non-finite date:
--
SELECT EXTRACT(MICROSEC  FROM DATE 'infinity');     -- error
ERROR:  unit "microsec" not recognized for type date
-- test constructors
select make_date(2013, 7, 15);
 make_date  
------------
 07-15-2013
(1 row)

select make_date(-44, 3, 15);
   make_date   
---------------
 03-15-0044 BC
(1 row)

select make_time(8, 20, 0.0);
 make_time 
-----------
 08:20:00
(1 row)

-- should fail
select make_date(0, 7, 15);
ERROR:  date field value out of range: 0-07-15
select make_date(2013, 2, 30);
ERROR:  date field value out of range: 2013-02-30
select make_date(2013, 13, 1);
ERROR:  date field value out of range: 2013-13-01
select make_date(2013, 11, -1);
ERROR:  date field value out of range: 2013-11--1
select make_time(10, 55, 100.1);
ERROR:  time field value out of range: 10:55:100.1
select make_time(24, 0, 2.1);
ERROR:  time field value out of range: 24:00:2.1