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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2011-03-02 14:43:24 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2011-03-02 14:44:33 -0500 |
| commit | 8436489c81c23af637696ac69cdaafddcc907ee1 (patch) | |
| tree | f9aabf47bbe6dba2f132dc472f855b306c2fe30c /contrib/btree_gist/expected/float8.out | |
| parent | 6094c242d1ee40a08f3138811425d7540e8269e4 (diff) | |
| download | postgresql-8436489c81c23af637696ac69cdaafddcc907ee1.tar.gz postgresql-8436489c81c23af637696ac69cdaafddcc907ee1.zip | |
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
Diffstat (limited to 'contrib/btree_gist/expected/float8.out')
| -rw-r--r-- | contrib/btree_gist/expected/float8.out | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/contrib/btree_gist/expected/float8.out b/contrib/btree_gist/expected/float8.out index 4598ac87a2c..7d2228b7973 100644 --- a/contrib/btree_gist/expected/float8.out +++ b/contrib/btree_gist/expected/float8.out @@ -32,6 +32,14 @@ SELECT count(*) FROM float8tmp WHERE a > -1890.0; 306 (1 row) +SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3; + a | ?column? +--------------+------------ + -1890 | 0 + -2003.634512 | 113.634512 + -1769.73634 | 120.26366 +(3 rows) + CREATE INDEX float8idx ON float8tmp USING gist ( a ); SET enable_seqscan=off; SELECT count(*) FROM float8tmp WHERE a < -1890.0::float8; @@ -64,3 +72,20 @@ SELECT count(*) FROM float8tmp WHERE a > -1890.0::float8; 306 (1 row) +EXPLAIN (COSTS OFF) +SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3; + QUERY PLAN +----------------------------------------------------- + Limit + -> Index Scan using float8idx on float8tmp + Order By: (a <-> (-1890)::double precision) +(3 rows) + +SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3; + a | ?column? +--------------+------------ + -1890 | 0 + -2003.634512 | 113.634512 + -1769.73634 | 120.26366 +(3 rows) + |