På søndag 07. august 2016 kl. 08:27:06, skrev Oleg Bartunov <[email protected]
<mailto:[email protected]>>:
[snip]
have you considered <=| and |=> operators ? <=> in ORDER BY works like KNN.
I don't get how these operators should work. Neither give me the expected
results.
Using <=>
SELECT del.entity_id, del.folder_id, del.received_timestamp FROM
origo_email_delivery delWHERE del.fts_all @@ to_tsquery('simple',
'andreas:*&jose:*') ORDER BY '2000-01-01' :: TIMESTAMP <=>
del.received_timestampLIMIT 10;
entity_id | folder_id | received_timestamp
-----------+-----------+-------------------------
1224278 | 1068087 | 2015-08-17 23:53:26
1224382 | 1068087 | 2015-08-18 03:07:55
1224404 | 1068087 | 2015-08-18 03:49:02
1505713 | 48496 | 2015-10-27 14:51:45
142132 | 66658 | 2012-12-03 14:14:05.488
122565 | 90115 | 2012-11-20 15:41:04.936
200744 | 66655 | 2013-01-28 21:47:44.561
1445927 | 888665 | 2015-09-29 00:26:56
123671 | 83509 | 2012-11-21 14:16:26.448
1129928 | 66658 | 2015-05-09 08:39:14.128
(10 rows)
Using <=|
SELECT del.entity_id, del.folder_id, del.received_timestamp FROM
origo_email_delivery delWHERE del.fts_all @@ to_tsquery('simple',
'andreas:*&jose:*') ORDER BY '2000-01-01' :: TIMESTAMP <=|
del.received_timestampLIMIT 10;
entity_id | folder_id | received_timestamp
-----------+-----------+-------------------------
1224278 | 1068087 | 2015-08-17 23:53:26
1224382 | 1068087 | 2015-08-18 03:07:55
1224404 | 1068087 | 2015-08-18 03:49:02
1505713 | 48496 | 2015-10-27 14:51:45
142132 | 66658 | 2012-12-03 14:14:05.488
122565 | 90115 | 2012-11-20 15:41:04.936
200744 | 66655 | 2013-01-28 21:47:44.561
1445927 | 888665 | 2015-09-29 00:26:56
123671 | 83509 | 2012-11-21 14:16:26.448
1129928 | 66658 | 2015-05-09 08:39:14.128
(10 rows)
Neither are ordered by received_timestamp
Can you explain how to get ORDER BY received_timestamp DESC?
Thanks.
-- Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
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