postgresql/contrib/btree_gist/sql/float8.sql
Tom Lane 8436489c81 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
2011-03-02 14:44:33 -05:00

38 lines
1004 B
SQL

-- float8 check
CREATE TABLE float8tmp (a float8);
\copy float8tmp from 'data/float8.data'
SET enable_seqscan=on;
SELECT count(*) FROM float8tmp WHERE a < -1890.0;
SELECT count(*) FROM float8tmp WHERE a <= -1890.0;
SELECT count(*) FROM float8tmp WHERE a = -1890.0;
SELECT count(*) FROM float8tmp WHERE a >= -1890.0;
SELECT count(*) FROM float8tmp WHERE a > -1890.0;
SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3;
CREATE INDEX float8idx ON float8tmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM float8tmp WHERE a < -1890.0::float8;
SELECT count(*) FROM float8tmp WHERE a <= -1890.0::float8;
SELECT count(*) FROM float8tmp WHERE a = -1890.0::float8;
SELECT count(*) FROM float8tmp WHERE a >= -1890.0::float8;
SELECT count(*) FROM float8tmp WHERE a > -1890.0::float8;
EXPLAIN (COSTS OFF)
SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3;
SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3;