mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-05 12:49:21 +02:00
0d93504c40
Modify date->timestamp conversion to use mktime(). This should do better than before around Daylight Savings Time transitions.
145 lines
2.7 KiB
Plaintext
145 lines
2.7 KiB
Plaintext
--
|
|
-- 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: Bad date external representation '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');
|
|
SELECT f1 AS "Fifteen" FROM DATE_TBL;
|
|
Fifteen
|
|
------------
|
|
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
|
|
(15 rows)
|
|
|
|
SELECT f1 AS "Nine" FROM DATE_TBL WHERE f1 < '2000-01-01';
|
|
Nine
|
|
------------
|
|
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
|
|
(9 rows)
|
|
|
|
SELECT f1 AS "Three" FROM DATE_TBL
|
|
WHERE f1 BETWEEN '2000-01-01' AND '2001-01-01';
|
|
Three
|
|
------------
|
|
04-01-2000
|
|
04-02-2000
|
|
04-03-2000
|
|
(3 rows)
|
|
|
|
--
|
|
-- 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
|
|
(15 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
|
|
(15 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)
|
|
|