--
-- ABSTIME
-- testing built-in time type abstime
-- uses reltime and tinterval
--
--
-- timezones may vary based not only on location but the operating
-- system.  the main correctness issue is that the OS may not get 
-- daylight savings time right for times prior to Unix epoch (jan 1 1970).
--
CREATE TABLE ABSTIME_TBL (f1 abstime);
INSERT INTO ABSTIME_TBL (f1) VALUES ('Jan 14, 1973 03:14:21');
-- was INSERT INTO ABSTIME_TBL (f1) VALUES (abstime 'now'):
INSERT INTO ABSTIME_TBL (f1) VALUES (abstime 'Mon May  1 00:30:30 1995');
INSERT INTO ABSTIME_TBL (f1) VALUES (abstime 'epoch');
INSERT INTO ABSTIME_TBL (f1) VALUES (abstime 'current');
INSERT INTO ABSTIME_TBL (f1) VALUES (abstime 'infinity');
INSERT INTO ABSTIME_TBL (f1) VALUES (abstime '-infinity');
INSERT INTO ABSTIME_TBL (f1) VALUES (abstime 'May 10, 1947 23:59:12');
-- what happens if we specify slightly misformatted abstime? 
INSERT INTO ABSTIME_TBL (f1) VALUES ('Feb 35, 1946 10:00:00');
ERROR:  Bad abstime external representation 'Feb 35, 1946 10:00:00'
INSERT INTO ABSTIME_TBL (f1) VALUES ('Feb 28, 1984 25:08:10');
ERROR:  Bad abstime external representation 'Feb 28, 1984 25:08:10'
-- badly formatted abstimes:  these should result in invalid abstimes 
INSERT INTO ABSTIME_TBL (f1) VALUES ('bad date format');
ERROR:  Bad abstime external representation 'bad date format'
INSERT INTO ABSTIME_TBL (f1) VALUES ('Jun 10, 1843');
-- test abstime operators
SELECT '' AS eight, ABSTIME_TBL.*;
 eight |              f1              
-------+------------------------------
       | Sun Jan 14 03:14:21 1973 PST
       | Mon May 01 00:30:30 1995 PDT
       | epoch
       | current
       | infinity
       | -infinity
       | Sat May 10 23:59:12 1947 PST
       | invalid
(8 rows)

SELECT '' AS six, ABSTIME_TBL.*
   WHERE ABSTIME_TBL.f1 < abstime 'Jun 30, 2001';
 six |              f1              
-----+------------------------------
     | Sun Jan 14 03:14:21 1973 PST
     | Mon May 01 00:30:30 1995 PDT
     | epoch
     | current
     | -infinity
     | Sat May 10 23:59:12 1947 PST
(6 rows)

SELECT '' AS six, ABSTIME_TBL.*
   WHERE ABSTIME_TBL.f1 > abstime '-infinity';
 six |              f1              
-----+------------------------------
     | Sun Jan 14 03:14:21 1973 PST
     | Mon May 01 00:30:30 1995 PDT
     | epoch
     | current
     | infinity
     | Sat May 10 23:59:12 1947 PST
(6 rows)

SELECT '' AS six, ABSTIME_TBL.*
   WHERE abstime 'May 10, 1947 23:59:12' <> ABSTIME_TBL.f1;
 six |              f1              
-----+------------------------------
     | Sun Jan 14 03:14:21 1973 PST
     | Mon May 01 00:30:30 1995 PDT
     | epoch
     | current
     | infinity
     | -infinity
(6 rows)

SELECT '' AS one, ABSTIME_TBL.*
   WHERE abstime 'current' = ABSTIME_TBL.f1;
 one |   f1    
-----+---------
     | current
(1 row)

SELECT '' AS three, ABSTIME_TBL.*
   WHERE abstime 'epoch' >= ABSTIME_TBL.f1;
 three |              f1              
-------+------------------------------
       | epoch
       | -infinity
       | Sat May 10 23:59:12 1947 PST
(3 rows)

SELECT '' AS four, ABSTIME_TBL.*
   WHERE ABSTIME_TBL.f1 <= abstime 'Jan 14, 1973 03:14:21';
 four |              f1              
------+------------------------------
      | Sun Jan 14 03:14:21 1973 PST
      | epoch
      | -infinity
      | Sat May 10 23:59:12 1947 PST
(4 rows)

SELECT '' AS four, ABSTIME_TBL.*
  WHERE ABSTIME_TBL.f1 <?>
	tinterval '["Apr 1 1950 00:00:00" "Dec 30 1999 23:00:00"]';
 four |              f1              
------+------------------------------
      | Sun Jan 14 03:14:21 1973 PST
      | Mon May 01 00:30:30 1995 PDT
      | epoch
(3 rows)

-- these four queries should return the same answer
-- the "infinity" and "-infinity" tuples in ABSTIME_TBL cannot be added and
-- therefore, should not show up in the results.
SELECT '' AS three, ABSTIME_TBL.*
  WHERE  (ABSTIME_TBL.f1 + reltime '@ 3 year') -- +3 years
	< abstime 'Jan 14 14:00:00 1977';
 three |              f1              
-------+------------------------------
       | Sun Jan 14 03:14:21 1973 PST
       | epoch
       | Sat May 10 23:59:12 1947 PST
(3 rows)

SELECT '' AS three, ABSTIME_TBL.*
   WHERE  (ABSTIME_TBL.f1 + reltime '@ 3 year ago')	-- -3 years
	< abstime 'Jan 14 14:00:00 1971';
 three |              f1              
-------+------------------------------
       | Sun Jan 14 03:14:21 1973 PST
       | epoch
       | Sat May 10 23:59:12 1947 PST
(3 rows)

SELECT '' AS three, ABSTIME_TBL.*
   WHERE  (ABSTIME_TBL.f1 - reltime '@ 3 year')        -- -(+3) years
	< abstime 'Jan 14 14:00:00 1971';
 three |              f1              
-------+------------------------------
       | Sun Jan 14 03:14:21 1973 PST
       | epoch
       | Sat May 10 23:59:12 1947 PST
(3 rows)

SELECT '' AS three, ABSTIME_TBL.*
   WHERE  (ABSTIME_TBL.f1 - reltime '@ 3 year ago')    -- -(-3) years
        < abstime 'Jan 14 14:00:00 1977';
 three |              f1              
-------+------------------------------
       | Sun Jan 14 03:14:21 1973 PST
       | epoch
       | Sat May 10 23:59:12 1947 PST
(3 rows)

SELECT '' AS ten, ABSTIME_TBL.f1 AS abstime, RELTIME_TBL.f1 AS reltime
   WHERE (ABSTIME_TBL.f1 + RELTIME_TBL.f1)
	< abstime 'Jan 14 14:00:00 1971'
   ORDER BY abstime, reltime;
 ten |           abstime            |    reltime    
-----+------------------------------+---------------
     | Sat May 10 23:59:12 1947 PST | @ 14 secs ago
     | Sat May 10 23:59:12 1947 PST | @ 1 min
     | Sat May 10 23:59:12 1947 PST | @ 5 hours
     | Sat May 10 23:59:12 1947 PST | @ 10 days
     | Sat May 10 23:59:12 1947 PST | @ 3 mons
     | epoch                        | @ 14 secs ago
     | epoch                        | @ 1 min
     | epoch                        | @ 5 hours
     | epoch                        | @ 10 days
     | epoch                        | @ 3 mons
(10 rows)

