From 8436489c81c23af637696ac69cdaafddcc907ee1 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Wed, 2 Mar 2011 14:43:24 -0500 Subject: Add KNNGIST support to contrib/btree_gist. This extends GiST's support for nearest-neighbor searches to many of the standard data types. Teodor Sigaev --- contrib/btree_gist/sql/timestamp.sql | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'contrib/btree_gist/sql/timestamp.sql') diff --git a/contrib/btree_gist/sql/timestamp.sql b/contrib/btree_gist/sql/timestamp.sql index 25e942874eb..95effebfc47 100644 --- a/contrib/btree_gist/sql/timestamp.sql +++ b/contrib/btree_gist/sql/timestamp.sql @@ -16,6 +16,8 @@ SELECT count(*) FROM timestamptmp WHERE a >= '2004-10-26 08:55:08'; SELECT count(*) FROM timestamptmp WHERE a > '2004-10-26 08:55:08'; +SELECT a, a <-> '2004-10-26 08:55:08' FROM timestamptmp ORDER BY a <-> '2004-10-26 08:55:08' LIMIT 3; + CREATE INDEX timestampidx ON timestamptmp USING gist ( a ); SET enable_seqscan=off; @@ -29,3 +31,7 @@ SELECT count(*) FROM timestamptmp WHERE a = '2004-10-26 08:55:08'::timestamp; SELECT count(*) FROM timestamptmp WHERE a >= '2004-10-26 08:55:08'::timestamp; SELECT count(*) FROM timestamptmp WHERE a > '2004-10-26 08:55:08'::timestamp; + +EXPLAIN (COSTS OFF) +SELECT a, a <-> '2004-10-26 08:55:08' FROM timestamptmp ORDER BY a <-> '2004-10-26 08:55:08' LIMIT 3; +SELECT a, a <-> '2004-10-26 08:55:08' FROM timestamptmp ORDER BY a <-> '2004-10-26 08:55:08' LIMIT 3; -- cgit v1.2.3