set enable_seqscan=off;
CREATE TABLE test_timestamp (
	i timestamp
);
INSERT INTO test_timestamp VALUES
	( '2004-10-26 03:55:08' ),
	( '2004-10-26 04:55:08' ),
	( '2004-10-26 05:55:08' ),
	( '2004-10-26 08:55:08' ),
	( '2004-10-27 09:55:08' ),
	( '2004-10-27 10:55:08' )
;
CREATE INDEX idx_timestamp ON test_timestamp USING gin (i);
SELECT * FROM test_timestamp WHERE i<'2004-10-26 08:55:08'::timestamp ORDER BY i;
            i             
--------------------------
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
(3 rows)

SELECT * FROM test_timestamp WHERE i<='2004-10-26 08:55:08'::timestamp ORDER BY i;
            i             
--------------------------
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
(4 rows)

SELECT * FROM test_timestamp WHERE i='2004-10-26 08:55:08'::timestamp ORDER BY i;
            i             
--------------------------
 Tue Oct 26 08:55:08 2004
(1 row)

SELECT * FROM test_timestamp WHERE i>='2004-10-26 08:55:08'::timestamp ORDER BY i;
            i             
--------------------------
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
(3 rows)

SELECT * FROM test_timestamp WHERE i>'2004-10-26 08:55:08'::timestamp ORDER BY i;
            i             
--------------------------
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
(2 rows)

explain (costs off)
SELECT * FROM test_timestamp WHERE i<'2004-10-27'::date ORDER BY i;
                     QUERY PLAN                     
----------------------------------------------------
 Sort
   Sort Key: i
   ->  Bitmap Heap Scan on test_timestamp
         Recheck Cond: (i < '10-27-2004'::date)
         ->  Bitmap Index Scan on idx_timestamp
               Index Cond: (i < '10-27-2004'::date)
(6 rows)

SELECT * FROM test_timestamp WHERE i<'2004-10-27'::date ORDER BY i;
            i             
--------------------------
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
(4 rows)

SELECT * FROM test_timestamp WHERE i<='2004-10-27'::date ORDER BY i;
            i             
--------------------------
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
(4 rows)

SELECT * FROM test_timestamp WHERE i='2004-10-27'::date ORDER BY i;
 i 
---
(0 rows)

SELECT * FROM test_timestamp WHERE i>='2004-10-27'::date ORDER BY i;
            i             
--------------------------
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
(2 rows)

SELECT * FROM test_timestamp WHERE i>'2004-10-27'::date ORDER BY i;
            i             
--------------------------
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
(2 rows)

explain (costs off)
SELECT * FROM test_timestamp WHERE i<'2004-10-26 08:55:08'::timestamptz ORDER BY i;
                                        QUERY PLAN                                        
------------------------------------------------------------------------------------------
 Sort
   Sort Key: i
   ->  Bitmap Heap Scan on test_timestamp
         Recheck Cond: (i < 'Tue Oct 26 08:55:08 2004 PDT'::timestamp with time zone)
         ->  Bitmap Index Scan on idx_timestamp
               Index Cond: (i < 'Tue Oct 26 08:55:08 2004 PDT'::timestamp with time zone)
(6 rows)

SELECT * FROM test_timestamp WHERE i<'2004-10-26 08:55:08'::timestamptz ORDER BY i;
            i             
--------------------------
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
(3 rows)

SELECT * FROM test_timestamp WHERE i<='2004-10-26 08:55:08'::timestamptz ORDER BY i;
            i             
--------------------------
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
(4 rows)

SELECT * FROM test_timestamp WHERE i='2004-10-26 08:55:08'::timestamptz ORDER BY i;
            i             
--------------------------
 Tue Oct 26 08:55:08 2004
(1 row)

SELECT * FROM test_timestamp WHERE i>='2004-10-26 08:55:08'::timestamptz ORDER BY i;
            i             
--------------------------
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
(3 rows)

SELECT * FROM test_timestamp WHERE i>'2004-10-26 08:55:08'::timestamptz ORDER BY i;
            i             
--------------------------
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
(2 rows)

-- Check endpoint and out-of-range cases
INSERT INTO test_timestamp VALUES ('-infinity'), ('infinity');
SELECT gin_clean_pending_list('idx_timestamp');
 gin_clean_pending_list 
------------------------
                      1
(1 row)

SELECT * FROM test_timestamp WHERE i<'-infinity'::date ORDER BY i;
 i 
---
(0 rows)

SELECT * FROM test_timestamp WHERE i<='-infinity'::date ORDER BY i;
     i     
-----------
 -infinity
(1 row)

SELECT * FROM test_timestamp WHERE i='-infinity'::date ORDER BY i;
     i     
-----------
 -infinity
(1 row)

SELECT * FROM test_timestamp WHERE i>='-infinity'::date ORDER BY i;
            i             
--------------------------
 -infinity
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
 infinity
(8 rows)

SELECT * FROM test_timestamp WHERE i>'-infinity'::date ORDER BY i;
            i             
--------------------------
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
 infinity
(7 rows)

SELECT * FROM test_timestamp WHERE i<'infinity'::date ORDER BY i;
            i             
--------------------------
 -infinity
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
(7 rows)

SELECT * FROM test_timestamp WHERE i<='infinity'::date ORDER BY i;
            i             
--------------------------
 -infinity
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
 infinity
(8 rows)

SELECT * FROM test_timestamp WHERE i='infinity'::date ORDER BY i;
    i     
----------
 infinity
(1 row)

SELECT * FROM test_timestamp WHERE i>='infinity'::date ORDER BY i;
    i     
----------
 infinity
(1 row)

SELECT * FROM test_timestamp WHERE i>'infinity'::date ORDER BY i;
 i 
---
(0 rows)

SELECT * FROM test_timestamp WHERE i<'-infinity'::timestamptz ORDER BY i;
 i 
---
(0 rows)

SELECT * FROM test_timestamp WHERE i<='-infinity'::timestamptz ORDER BY i;
     i     
-----------
 -infinity
(1 row)

SELECT * FROM test_timestamp WHERE i='-infinity'::timestamptz ORDER BY i;
     i     
-----------
 -infinity
(1 row)

SELECT * FROM test_timestamp WHERE i>='-infinity'::timestamptz ORDER BY i;
            i             
--------------------------
 -infinity
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
 infinity
(8 rows)

SELECT * FROM test_timestamp WHERE i>'-infinity'::timestamptz ORDER BY i;
            i             
--------------------------
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
 infinity
(7 rows)

SELECT * FROM test_timestamp WHERE i<'infinity'::timestamptz ORDER BY i;
            i             
--------------------------
 -infinity
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
(7 rows)

SELECT * FROM test_timestamp WHERE i<='infinity'::timestamptz ORDER BY i;
            i             
--------------------------
 -infinity
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
 infinity
(8 rows)

SELECT * FROM test_timestamp WHERE i='infinity'::timestamptz ORDER BY i;
    i     
----------
 infinity
(1 row)

SELECT * FROM test_timestamp WHERE i>='infinity'::timestamptz ORDER BY i;
    i     
----------
 infinity
(1 row)

SELECT * FROM test_timestamp WHERE i>'infinity'::timestamptz ORDER BY i;
 i 
---
(0 rows)

-- This PST timestamptz will underflow if converted to timestamp
SELECT * FROM test_timestamp WHERE i<='4714-11-23 17:00 BC'::timestamptz ORDER BY i;
     i     
-----------
 -infinity
(1 row)

SELECT * FROM test_timestamp WHERE i>'4714-11-23 17:00 BC'::timestamptz ORDER BY i;
            i             
--------------------------
 Tue Oct 26 03:55:08 2004
 Tue Oct 26 04:55:08 2004
 Tue Oct 26 05:55:08 2004
 Tue Oct 26 08:55:08 2004
 Wed Oct 27 09:55:08 2004
 Wed Oct 27 10:55:08 2004
 infinity
(7 rows)