-- timestamptz check
CREATE TABLE timestamptztmp (a timestamptz);
\copy timestamptztmp from 'data/timestamptz.data'
SET enable_seqscan=on;
SELECT count(*) FROM timestamptztmp WHERE a <  '2018-12-18 10:59:54 GMT+3';
 count 
-------
   391
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <= '2018-12-18 10:59:54 GMT+3';
 count 
-------
   392
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a  = '2018-12-18 10:59:54 GMT+3';
 count 
-------
     1
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >= '2018-12-18 10:59:54 GMT+3';
 count 
-------
   158
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >  '2018-12-18 10:59:54 GMT+3';
 count 
-------
   157
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <  '2018-12-18 10:59:54 GMT+2';
 count 
-------
   391
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <= '2018-12-18 10:59:54 GMT+2';
 count 
-------
   391
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a  = '2018-12-18 10:59:54 GMT+2';
 count 
-------
     0
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >= '2018-12-18 10:59:54 GMT+2';
 count 
-------
   158
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >  '2018-12-18 10:59:54 GMT+2';
 count 
-------
   158
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <  '2018-12-18 10:59:54 GMT+4';
 count 
-------
   392
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <= '2018-12-18 10:59:54 GMT+4';
 count 
-------
   392
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a  = '2018-12-18 10:59:54 GMT+4';
 count 
-------
     0
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >= '2018-12-18 10:59:54 GMT+4';
 count 
-------
   157
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >  '2018-12-18 10:59:54 GMT+4';
 count 
-------
   157
(1 row)

CREATE INDEX timestamptzidx ON timestamptztmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM timestamptztmp WHERE a <  '2018-12-18 10:59:54 GMT+3'::timestamptz;
 count 
-------
   391
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <= '2018-12-18 10:59:54 GMT+3'::timestamptz;
 count 
-------
   392
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a  = '2018-12-18 10:59:54 GMT+3'::timestamptz;
 count 
-------
     1
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >= '2018-12-18 10:59:54 GMT+3'::timestamptz;
 count 
-------
   158
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >  '2018-12-18 10:59:54 GMT+3'::timestamptz;
 count 
-------
   157
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <  '2018-12-18 10:59:54 GMT+2'::timestamptz;
 count 
-------
   391
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <= '2018-12-18 10:59:54 GMT+2'::timestamptz;
 count 
-------
   391
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a  = '2018-12-18 10:59:54 GMT+2'::timestamptz;
 count 
-------
     0
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >= '2018-12-18 10:59:54 GMT+2'::timestamptz;
 count 
-------
   158
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >  '2018-12-18 10:59:54 GMT+2'::timestamptz;
 count 
-------
   158
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <  '2018-12-18 10:59:54 GMT+4'::timestamptz;
 count 
-------
   392
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a <= '2018-12-18 10:59:54 GMT+4'::timestamptz;
 count 
-------
   392
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a  = '2018-12-18 10:59:54 GMT+4'::timestamptz;
 count 
-------
     0
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >= '2018-12-18 10:59:54 GMT+4'::timestamptz;
 count 
-------
   157
(1 row)

SELECT count(*) FROM timestamptztmp WHERE a >  '2018-12-18 10:59:54 GMT+4'::timestamptz;
 count 
-------
   157
(1 row)