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Add KNNGIST support to contrib/btree_gist.

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This extends GiST's support for nearest-neighbor searches to many of the
standard data types.

Teodor Sigaev
This commit is contained in:
Tom Lane
2011-03-02 14:43:24 -05:00
parent 6094c242d1
commit 8436489c81
40 changed files with 1546 additions and 59 deletions
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6
contrib/btree_gist/sql/timestamptz.sql
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@ -37,7 +37,7 @@ SELECT count(*) FROM timestamptztmp WHERE a >= '2018-12-18 10:59:54 GMT+4';
SELECT count(*) FROM timestamptztmp WHERE a > '2018-12-18 10:59:54 GMT+4';
SELECT a, a <-> '2018-12-18 10:59:54 GMT+2' FROM timestamptztmp ORDER BY a <-> '2018-12-18 10:59:54 GMT+2' LIMIT 3;
CREATE INDEX timestamptzidx ON timestamptztmp USING gist ( a );
@ -74,3 +74,7 @@ SELECT count(*) FROM timestamptztmp WHERE a = '2018-12-18 10:59:54 GMT+4'::time
SELECT count(*) FROM timestamptztmp WHERE a >= '2018-12-18 10:59:54 GMT+4'::timestamptz;
SELECT count(*) FROM timestamptztmp WHERE a > '2018-12-18 10:59:54 GMT+4'::timestamptz;
EXPLAIN (COSTS OFF)
SELECT a, a <-> '2018-12-18 10:59:54 GMT+2' FROM timestamptztmp ORDER BY a <-> '2018-12-18 10:59:54 GMT+2' LIMIT 3;
SELECT a, a <-> '2018-12-18 10:59:54 GMT+2' FROM timestamptztmp ORDER BY a <-> '2018-12-18 10:59:54 GMT+2' LIMIT 3;