horology.out

来自「postgresql8.3.4源码,开源数据库」· OUT 代码 · 共 1,456 行 · 第 1/5 页

SELECT (timestamp with time zone 'today' = (timestamp with time zone 'tomorrow' - interval '1 day')) as "True";
 True 
------
 t
(1 row)

SELECT (timestamp with time zone 'tomorrow' = (timestamp with time zone 'yesterday' + interval '2 days')) as "True";
 True 
------
 t
(1 row)

SELECT (timestamp with time zone 'tomorrow' > 'now') as "True";
 True 
------
 t
(1 row)

-- timestamp with time zone, interval arithmetic around DST change
SET TIME ZONE 'CST7CDT';
SELECT timestamp with time zone '2005-04-02 12:00-07' + interval '1 day' as "Apr 3, 12:00";
         Apr 3, 12:00         
------------------------------
 Sun Apr 03 12:00:00 2005 CDT
(1 row)

SELECT timestamp with time zone '2005-04-02 12:00-07' + interval '24 hours' as "Apr 3, 13:00";
         Apr 3, 13:00         
------------------------------
 Sun Apr 03 13:00:00 2005 CDT
(1 row)

SELECT timestamp with time zone '2005-04-03 12:00-06' - interval '1 day' as "Apr 2, 12:00";
         Apr 2, 12:00         
------------------------------
 Sat Apr 02 12:00:00 2005 CST
(1 row)

SELECT timestamp with time zone '2005-04-03 12:00-06' - interval '24 hours' as "Apr 2, 11:00";
         Apr 2, 11:00         
------------------------------
 Sat Apr 02 11:00:00 2005 CST
(1 row)

RESET TIME ZONE;
SELECT timestamptz(date '1994-01-01', time '11:00') AS "Jan_01_1994_10am";
       Jan_01_1994_10am       
------------------------------
 Sat Jan 01 11:00:00 1994 PST
(1 row)

SELECT timestamptz(date '1994-01-01', time '10:00') AS "Jan_01_1994_9am";
       Jan_01_1994_9am        
------------------------------
 Sat Jan 01 10:00:00 1994 PST
(1 row)

SELECT timestamptz(date '1994-01-01', time with time zone '11:00-8') AS "Jan_01_1994_11am";
       Jan_01_1994_11am       
------------------------------
 Sat Jan 01 11:00:00 1994 PST
(1 row)

SELECT timestamptz(date '1994-01-01', time with time zone '10:00-8') AS "Jan_01_1994_10am";
       Jan_01_1994_10am       
------------------------------
 Sat Jan 01 10:00:00 1994 PST
(1 row)

SELECT timestamptz(date '1994-01-01', time with time zone '11:00-5') AS "Jan_01_1994_8am";
       Jan_01_1994_8am        
------------------------------
 Sat Jan 01 08:00:00 1994 PST
(1 row)

SELECT '' AS "64", d1 + interval '1 year' AS one_year FROM TIMESTAMPTZ_TBL;
 64 |            one_year             
----+---------------------------------
    | -infinity
    | infinity
    | Thu Dec 31 16:00:00 1970 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:02 1998 PST
    | Tue Feb 10 17:32:01.40 1998 PST
    | Tue Feb 10 17:32:01.50 1998 PST
    | Tue Feb 10 17:32:01.60 1998 PST
    | Fri Jan 02 00:00:00 1998 PST
    | Fri Jan 02 03:04:05 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Wed Jun 10 17:32:01 1998 PDT
    | Sun Sep 22 18:19:20 2002 PDT
    | Thu Mar 15 08:14:01 2001 PST
    | Thu Mar 15 04:14:02 2001 PST
    | Thu Mar 15 02:14:03 2001 PST
    | Thu Mar 15 03:14:04 2001 PST
    | Thu Mar 15 01:14:05 2001 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:00 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 17:32:01 1998 PST
    | Tue Feb 10 09:32:01 1998 PST
    | Tue Feb 10 09:32:01 1998 PST
    | Tue Feb 10 09:32:01 1998 PST
    | Tue Feb 10 14:32:01 1998 PST
    | Fri Jul 10 14:32:01 1998 PDT
    | Wed Jun 10 18:32:01 1998 PDT
    | Tue Feb 10 17:32:01 1998 PST
    | Wed Feb 11 17:32:01 1998 PST
    | Thu Feb 12 17:32:01 1998 PST
    | Fri Feb 13 17:32:01 1998 PST
    | Sat Feb 14 17:32:01 1998 PST
    | Sun Feb 15 17:32:01 1998 PST
    | Mon Feb 16 17:32:01 1998 PST
    | Thu Feb 16 17:32:01 0096 PST BC
    | Sun Feb 16 17:32:01 0098 PST
    | Fri Feb 16 17:32:01 0598 PST
    | Wed Feb 16 17:32:01 1098 PST
    | Sun Feb 16 17:32:01 1698 PST
    | Fri Feb 16 17:32:01 1798 PST
    | Wed Feb 16 17:32:01 1898 PST
    | Mon Feb 16 17:32:01 1998 PST
    | Sun Feb 16 17:32:01 2098 PST
    | Fri Feb 28 17:32:01 1997 PST
    | Fri Feb 28 17:32:01 1997 PST
    | Sat Mar 01 17:32:01 1997 PST
    | Tue Dec 30 17:32:01 1997 PST
    | Wed Dec 31 17:32:01 1997 PST
    | Thu Jan 01 17:32:01 1998 PST
    | Sat Feb 28 17:32:01 1998 PST
    | Sun Mar 01 17:32:01 1998 PST
    | Wed Dec 30 17:32:01 1998 PST
    | Thu Dec 31 17:32:01 1998 PST
    | Sun Dec 31 17:32:01 2000 PST
    | Mon Jan 01 17:32:01 2001 PST
    | Mon Dec 31 17:32:01 2001 PST
    | Tue Jan 01 17:32:01 2002 PST
(66 rows)

SELECT '' AS "64", d1 - interval '1 year' AS one_year FROM TIMESTAMPTZ_TBL;
 64 |            one_year             
----+---------------------------------
    | -infinity
    | infinity
    | Tue Dec 31 16:00:00 1968 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:02 1996 PST
    | Sat Feb 10 17:32:01.40 1996 PST
    | Sat Feb 10 17:32:01.50 1996 PST
    | Sat Feb 10 17:32:01.60 1996 PST
    | Tue Jan 02 00:00:00 1996 PST
    | Tue Jan 02 03:04:05 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Mon Jun 10 17:32:01 1996 PDT
    | Fri Sep 22 18:19:20 2000 PDT
    | Mon Mar 15 08:14:01 1999 PST
    | Mon Mar 15 04:14:02 1999 PST
    | Mon Mar 15 02:14:03 1999 PST
    | Mon Mar 15 03:14:04 1999 PST
    | Mon Mar 15 01:14:05 1999 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:00 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 17:32:01 1996 PST
    | Sat Feb 10 09:32:01 1996 PST
    | Sat Feb 10 09:32:01 1996 PST
    | Sat Feb 10 09:32:01 1996 PST
    | Sat Feb 10 14:32:01 1996 PST
    | Wed Jul 10 14:32:01 1996 PDT
    | Mon Jun 10 18:32:01 1996 PDT
    | Sat Feb 10 17:32:01 1996 PST
    | Sun Feb 11 17:32:01 1996 PST
    | Mon Feb 12 17:32:01 1996 PST
    | Tue Feb 13 17:32:01 1996 PST
    | Wed Feb 14 17:32:01 1996 PST
    | Thu Feb 15 17:32:01 1996 PST
    | Fri Feb 16 17:32:01 1996 PST
    | Mon Feb 16 17:32:01 0098 PST BC
    | Thu Feb 16 17:32:01 0096 PST
    | Tue Feb 16 17:32:01 0596 PST
    | Sun Feb 16 17:32:01 1096 PST
    | Thu Feb 16 17:32:01 1696 PST
    | Tue Feb 16 17:32:01 1796 PST
    | Sun Feb 16 17:32:01 1896 PST
    | Fri Feb 16 17:32:01 1996 PST
    | Thu Feb 16 17:32:01 2096 PST
    | Tue Feb 28 17:32:01 1995 PST
    | Tue Feb 28 17:32:01 1995 PST
    | Wed Mar 01 17:32:01 1995 PST
    | Sat Dec 30 17:32:01 1995 PST
    | Sun Dec 31 17:32:01 1995 PST
    | Mon Jan 01 17:32:01 1996 PST
    | Wed Feb 28 17:32:01 1996 PST
    | Fri Mar 01 17:32:01 1996 PST
    | Mon Dec 30 17:32:01 1996 PST
    | Tue Dec 31 17:32:01 1996 PST
    | Thu Dec 31 17:32:01 1998 PST
    | Fri Jan 01 17:32:01 1999 PST
    | Fri Dec 31 17:32:01 1999 PST
    | Sat Jan 01 17:32:01 2000 PST
(66 rows)

--
-- time, interval arithmetic
--
SELECT CAST(time '01:02' AS interval) AS "+01:02";
     +01:02      
-----------------
 @ 1 hour 2 mins
(1 row)

SELECT CAST(interval '02:03' AS time) AS "02:03:00";
 02:03:00 
----------
 02:03:00
(1 row)

SELECT time '01:30' + interval '02:01' AS "03:31:00";
 03:31:00 
----------
 03:31:00
(1 row)

SELECT time '01:30' - interval '02:01' AS "23:29:00";
 23:29:00 
----------
 23:29:00
(1 row)

SELECT time '02:30' + interval '36:01' AS "14:31:00";
 14:31:00 
----------
 14:31:00
(1 row)

SELECT time '03:30' + interval '1 month 04:01' AS "07:31:00";
 07:31:00 
----------
 07:31:00
(1 row)

SELECT CAST(time with time zone '01:02-08' AS interval) AS "+00:01";
ERROR:  cannot cast type time with time zone to interval
LINE 1: SELECT CAST(time with time zone '01:02-08' AS interval) AS "...
                                                      ^
SELECT CAST(interval '02:03' AS time with time zone) AS "02:03:00-08";
ERROR:  cannot cast type interval to time with time zone
LINE 1: SELECT CAST(interval '02:03' AS time with time zone) AS "02:...
                                        ^
SELECT time with time zone '01:30-08' - interval '02:01' AS "23:29:00-08";
 23:29:00-08 
-------------
 23:29:00-08
(1 row)

SELECT time with time zone '02:30-08' + interval '36:01' AS "14:31:00-08";
 14:31:00-08 
-------------
 14:31:00-08
(1 row)

-- These two tests cannot be used because they default to current timezone,
-- which may be either -08 or -07 depending on the time of year.
-- SELECT time with time zone '01:30' + interval '02:01' AS "03:31:00-08";
-- SELECT time with time zone '03:30' + interval '1 month 04:01' AS "07:31:00-08";
-- Try the following two tests instead, as a poor substitute
SELECT CAST(CAST(date 'today' + time with time zone '05:30'
            + interval '02:01' AS time with time zone) AS time) AS "07:31:00";
 07:31:00 
----------
 07:31:00
(1 row)

SELECT CAST(cast(date 'today' + time with time zone '03:30'
  + interval '1 month 04:01' as timestamp without time zone) AS time) AS "07:31:00";
 07:31:00 
----------