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Add KNNGIST support to contrib/btree_gist.

Browse Source 
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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25
contrib/btree_gist/expected/cash.out
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@ -32,6 +32,14 @@ SELECT count(*) FROM moneytmp WHERE a > '22649.64';
253
(1 row)
SELECT a, a <-> '21472.79' FROM moneytmp ORDER BY a <-> '21472.79' LIMIT 3;
a | ?column?
------------+----------
$21,472.79 | $0.00
$21,469.25 | $3.54
$21,915.01 | $442.22
(3 rows)
CREATE INDEX moneyidx ON moneytmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM moneytmp WHERE a < '22649.64'::money;
@ -64,3 +72,20 @@ SELECT count(*) FROM moneytmp WHERE a > '22649.64'::money;
253
(1 row)
EXPLAIN (COSTS OFF)
SELECT a, a <-> '21472.79' FROM moneytmp ORDER BY a <-> '21472.79' LIMIT 3;
QUERY PLAN
-----------------------------------------------
Limit
-> Index Scan using moneyidx on moneytmp
Order By: (a <-> '$21,472.79'::money)
(3 rows)
SELECT a, a <-> '21472.79' FROM moneytmp ORDER BY a <-> '21472.79' LIMIT 3;
a | ?column?
------------+----------
$21,472.79 | $0.00
$21,469.25 | $3.54
$21,915.01 | $442.22
(3 rows)

25
contrib/btree_gist/expected/date.out
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@ -32,6 +32,14 @@ SELECT count(*) FROM datetmp WHERE a > '2001-02-13';
313
(1 row)
SELECT a, a <-> '2001-02-13' FROM datetmp ORDER BY a <-> '2001-02-13' LIMIT 3;
a | ?column?
------------+----------
02-13-2001 | 0
02-11-2001 | 2
03-24-2001 | 39
(3 rows)
CREATE INDEX dateidx ON datetmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM datetmp WHERE a < '2001-02-13'::date;
@ -64,3 +72,20 @@ SELECT count(*) FROM datetmp WHERE a > '2001-02-13'::date;
313
(1 row)
EXPLAIN (COSTS OFF)
SELECT a, a <-> '2001-02-13' FROM datetmp ORDER BY a <-> '2001-02-13' LIMIT 3;
QUERY PLAN
----------------------------------------------
Limit
-> Index Scan using dateidx on datetmp
Order By: (a <-> '02-13-2001'::date)
(3 rows)
SELECT a, a <-> '2001-02-13' FROM datetmp ORDER BY a <-> '2001-02-13' LIMIT 3;
a | ?column?
------------+----------
02-13-2001 | 0
02-11-2001 | 2
03-24-2001 | 39
(3 rows)

25
contrib/btree_gist/expected/float4.out
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@ -32,6 +32,14 @@ SELECT count(*) FROM float4tmp WHERE a > -179.0;
302
(1 row)
SELECT a, a <-> '-179.0' FROM float4tmp ORDER BY a <-> '-179.0' LIMIT 3;
a | ?column?
----------+----------
-179 | 0
-189.024 | 10.0239
-158.177 | 20.8226
(3 rows)
CREATE INDEX float4idx ON float4tmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM float4tmp WHERE a < -179.0::float4;
@ -64,3 +72,20 @@ SELECT count(*) FROM float4tmp WHERE a > -179.0::float4;
302
(1 row)
EXPLAIN (COSTS OFF)
SELECT a, a <-> '-179.0' FROM float4tmp ORDER BY a <-> '-179.0' LIMIT 3;
QUERY PLAN
-----------------------------------------------
Limit
-> Index Scan using float4idx on float4tmp
Order By: (a <-> (-179)::real)
(3 rows)
SELECT a, a <-> '-179.0' FROM float4tmp ORDER BY a <-> '-179.0' LIMIT 3;
a | ?column?
----------+----------
-179 | 0
-189.024 | 10.0239
-158.177 | 20.8226
(3 rows)

25
contrib/btree_gist/expected/float8.out
View File

@ -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)

25
contrib/btree_gist/expected/int2.out
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@ -32,6 +32,14 @@ SELECT count(*) FROM int2tmp WHERE a > 237;
248
(1 row)
SELECT a, a <-> '237' FROM int2tmp ORDER BY a <-> '237' LIMIT 3;
a | ?column?
-----+----------
237 | 0
232 | 5
228 | 9
(3 rows)
CREATE INDEX int2idx ON int2tmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM int2tmp WHERE a < 237::int2;
@ -64,3 +72,20 @@ SELECT count(*) FROM int2tmp WHERE a > 237::int2;
248
(1 row)
EXPLAIN (COSTS OFF)
SELECT a, a <-> '237' FROM int2tmp ORDER BY a <-> '237' LIMIT 3;
QUERY PLAN
-------------------------------------------
Limit
-> Index Scan using int2idx on int2tmp
Order By: (a <-> 237::smallint)
(3 rows)
SELECT a, a <-> '237' FROM int2tmp ORDER BY a <-> '237' LIMIT 3;
a | ?column?
-----+----------
237 | 0
232 | 5
228 | 9
(3 rows)

25
contrib/btree_gist/expected/int4.out
View File

@ -32,6 +32,14 @@ SELECT count(*) FROM int4tmp WHERE a > 237;
248
(1 row)
SELECT a, a <-> '237' FROM int4tmp ORDER BY a <-> '237' LIMIT 3;
a | ?column?
-----+----------
237 | 0
232 | 5
228 | 9
(3 rows)
CREATE INDEX int4idx ON int4tmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM int4tmp WHERE a < 237::int4;
@ -64,3 +72,20 @@ SELECT count(*) FROM int4tmp WHERE a > 237::int4;
248
(1 row)
EXPLAIN (COSTS OFF)
SELECT a, a <-> '237' FROM int4tmp ORDER BY a <-> '237' LIMIT 3;
QUERY PLAN
-------------------------------------------
Limit
-> Index Scan using int4idx on int4tmp
Order By: (a <-> 237)
(3 rows)
SELECT a, a <-> '237' FROM int4tmp ORDER BY a <-> '237' LIMIT 3;
a | ?column?
-----+----------
237 | 0
232 | 5
228 | 9
(3 rows)

25
contrib/btree_gist/expected/int8.out
View File

@ -32,6 +32,14 @@ SELECT count(*) FROM int8tmp WHERE a > 464571291354841;
270
(1 row)
SELECT a, a <-> '464571291354841' FROM int8tmp ORDER BY a <-> '464571291354841' LIMIT 3;
a | ?column?
-----------------+----------------
464571291354841 | 0
457257666629329 | 7313624725512
478227196042750 | 13655904687909
(3 rows)
CREATE INDEX int8idx ON int8tmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM int8tmp WHERE a < 464571291354841::int8;
@ -64,3 +72,20 @@ SELECT count(*) FROM int8tmp WHERE a > 464571291354841::int8;
270
(1 row)
EXPLAIN (COSTS OFF)
SELECT a, a <-> '464571291354841' FROM int8tmp ORDER BY a <-> '464571291354841' LIMIT 3;
QUERY PLAN
---------------------------------------------------
Limit
-> Index Scan using int8idx on int8tmp
Order By: (a <-> 464571291354841::bigint)
(3 rows)
SELECT a, a <-> '464571291354841' FROM int8tmp ORDER BY a <-> '464571291354841' LIMIT 3;
a | ?column?
-----------------+----------------
464571291354841 | 0
457257666629329 | 7313624725512
478227196042750 | 13655904687909
(3 rows)

25
contrib/btree_gist/expected/interval.out
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@ -32,6 +32,14 @@ SELECT count(*) FROM intervaltmp WHERE a > '199 days 21:21:23';
270
(1 row)
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
a | ?column?
-------------------------------------+--------------------------------------
@ 199 days 21 hours 21 mins 23 secs | @ 0
@ 183 days 6 hours 52 mins 48 secs | @ 16 days 14 hours 28 mins 35 secs
@ 220 days 19 hours 5 mins 42 secs | @ 21 days -2 hours -15 mins -41 secs
(3 rows)
CREATE INDEX intervalidx ON intervaltmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM intervaltmp WHERE a < '199 days 21:21:23'::interval;
@ -64,3 +72,20 @@ SELECT count(*) FROM intervaltmp WHERE a > '199 days 21:21:23'::interval;
270
(1 row)
EXPLAIN (COSTS OFF)
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
QUERY PLAN
---------------------------------------------------------------------------
Limit
-> Index Scan using intervalidx on intervaltmp
Order By: (a <-> '@ 199 days 21 hours 21 mins 23 secs'::interval)
(3 rows)
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
a | ?column?
-------------------------------------+--------------------------------------
@ 199 days 21 hours 21 mins 23 secs | @ 0
@ 183 days 6 hours 52 mins 48 secs | @ 16 days 14 hours 28 mins 35 secs
@ 220 days 19 hours 5 mins 42 secs | @ 21 days -2 hours -15 mins -41 secs
(3 rows)

25
contrib/btree_gist/expected/time.out
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@ -32,6 +32,14 @@ SELECT count(*) FROM timetmp WHERE a > '10:57:11';
292
(1 row)
SELECT a, a <-> '10:57:11' FROM timetmp ORDER BY a <-> '10:57:11' LIMIT 3;
a | ?column?
----------+-----------------
10:57:11 | @ 0
10:57:10 | @ 1 sec
10:55:32 | @ 1 min 39 secs
(3 rows)
CREATE INDEX timeidx ON timetmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM timetmp WHERE a < '10:57:11'::time;
@ -64,3 +72,20 @@ SELECT count(*) FROM timetmp WHERE a > '10:57:11'::time;
292
(1 row)
EXPLAIN (COSTS OFF)
SELECT a, a <-> '10:57:11' FROM timetmp ORDER BY a <-> '10:57:11' LIMIT 3;
QUERY PLAN
--------------------------------------------------------------
Limit
-> Index Scan using timeidx on timetmp
Order By: (a <-> '10:57:11'::time without time zone)
(3 rows)
SELECT a, a <-> '10:57:11' FROM timetmp ORDER BY a <-> '10:57:11' LIMIT 3;
a | ?column?
----------+-----------------
10:57:11 | @ 0
10:57:10 | @ 1 sec
10:55:32 | @ 1 min 39 secs
(3 rows)

25
contrib/btree_gist/expected/timestamp.out
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@ -32,6 +32,14 @@ SELECT count(*) FROM timestamptmp WHERE a > '2004-10-26 08:55:08';
289
(1 row)
SELECT a, a <-> '2004-10-26 08:55:08' FROM timestamptmp ORDER BY a <-> '2004-10-26 08:55:08' LIMIT 3;
a | ?column?
--------------------------+------------------------------------
Tue Oct 26 08:55:08 2004 | @ 0
Sun Oct 31 06:35:03 2004 | @ 4 days 21 hours 39 mins 55 secs
Mon Nov 29 20:12:43 2004 | @ 34 days 11 hours 17 mins 35 secs
(3 rows)
CREATE INDEX timestampidx ON timestamptmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM timestamptmp WHERE a < '2004-10-26 08:55:08'::timestamp;
@ -64,3 +72,20 @@ SELECT count(*) FROM timestamptmp WHERE a > '2004-10-26 08:55:08'::timestamp;
289
(1 row)
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;
QUERY PLAN
-----------------------------------------------------------------------------------
Limit
-> Index Scan using timestampidx on timestamptmp
Order By: (a <-> 'Tue Oct 26 08:55:08 2004'::timestamp without time zone)
(3 rows)
SELECT a, a <-> '2004-10-26 08:55:08' FROM timestamptmp ORDER BY a <-> '2004-10-26 08:55:08' LIMIT 3;
a | ?column?
--------------------------+------------------------------------
Tue Oct 26 08:55:08 2004 | @ 0
Sun Oct 31 06:35:03 2004 | @ 4 days 21 hours 39 mins 55 secs
Mon Nov 29 20:12:43 2004 | @ 34 days 11 hours 17 mins 35 secs
(3 rows)

25
contrib/btree_gist/expected/timestamptz.out
View File

@ -92,6 +92,14 @@ SELECT count(*) FROM timestamptztmp WHERE a > '2018-12-18 10:59:54 GMT+4';
157
(1 row)
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;
a | ?column?
------------------------------+-----------------------------------
Tue Dec 18 05:59:54 2018 PST | @ 1 hour
Thu Jan 10 03:01:34 2019 PST | @ 22 days 22 hours 1 min 40 secs
Thu Jan 24 12:28:12 2019 PST | @ 37 days 7 hours 28 mins 18 secs
(3 rows)
CREATE INDEX timestamptzidx ON timestamptztmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM timestamptztmp WHERE a < '2018-12-18 10:59:54 GMT+3'::timestamptz;
@ -184,3 +192,20 @@ SELECT count(*) FROM timestamptztmp WHERE a > '2018-12-18 10:59:54 GMT+4'::time
157
(1 row)
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;
QUERY PLAN
------------------------------------------------------------------------------------
Limit
-> Index Scan using timestamptzidx on timestamptztmp
Order By: (a <-> 'Tue Dec 18 04:59:54 2018 PST'::timestamp with time zone)
(3 rows)
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;
a | ?column?
------------------------------+-----------------------------------
Tue Dec 18 05:59:54 2018 PST | @ 1 hour
Thu Jan 10 03:01:34 2019 PST | @ 22 days 22 hours 1 min 40 secs
Thu Jan 24 12:28:12 2019 PST | @ 37 days 7 hours 28 mins 18 secs
(3 rows)