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|
CREATE TABLE test_rum_hash( t text, a tsvector );
CREATE TRIGGER tsvectorupdate
BEFORE UPDATE OR INSERT ON test_rum_hash
FOR EACH ROW EXECUTE PROCEDURE tsvector_update_trigger('a', 'pg_catalog.english', 't');
CREATE INDEX rumhashidx ON test_rum_hash USING rum (a rum_tsvector_hash_ops);
\copy test_rum_hash(t) from 'data/rum.data';
CREATE INDEX failed_rumidx ON test_rum_hash USING rum (a rum_tsvector_addon_ops);
ERROR: additional information attribute "a" is not found in index
SET enable_seqscan=off;
SET enable_indexscan=off;
explain (costs off)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'ever|wrote');
QUERY PLAN
------------------------------------------------------------------
Aggregate
-> Bitmap Heap Scan on test_rum_hash
Recheck Cond: (a @@ '''ever'' | ''wrote'''::tsquery)
-> Bitmap Index Scan on rumhashidx
Index Cond: (a @@ '''ever'' | ''wrote'''::tsquery)
(5 rows)
explain (costs off)
SELECT * FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'ever|wrote')
ORDER BY a <=> to_tsquery('pg_catalog.english', 'ever|wrote');
QUERY PLAN
------------------------------------------------------------------
Sort
Sort Key: ((a <=> '''ever'' | ''wrote'''::tsquery))
-> Bitmap Heap Scan on test_rum_hash
Recheck Cond: (a @@ '''ever'' | ''wrote'''::tsquery)
-> Bitmap Index Scan on rumhashidx
Index Cond: (a @@ '''ever'' | ''wrote'''::tsquery)
(6 rows)
explain (costs off)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english',
'def <-> fgr');
QUERY PLAN
-----------------------------------------------------------------
Aggregate
-> Bitmap Heap Scan on test_rum_hash
Recheck Cond: (a @@ '''def'' <-> ''fgr'''::tsquery)
-> Bitmap Index Scan on rumhashidx
Index Cond: (a @@ '''def'' <-> ''fgr'''::tsquery)
(5 rows)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'ever|wrote');
count
-------
2
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'have&wish');
count
-------
1
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'knew&brain');
count
-------
0
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'among');
count
-------
1
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'structure&ancient');
count
-------
1
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', '(complimentary|sight)&(sending|heart)');
count
-------
2
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', '(gave | half) <-> way');
count
-------
2
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', '(gave | !half) <-> way');
count
-------
3
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', '!gave & way');
count
-------
3
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', '!gave & wooded & !look');
count
-------
1
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english',
'def <-> fgr');
count
-------
1
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english',
'def <2> fgr');
count
-------
1
(1 row)
SELECT rum_ts_distance(a, to_tsquery('pg_catalog.english', 'way'))::numeric(10,4),
rum_ts_score(a, to_tsquery('pg_catalog.english', 'way'))::numeric(10,7),
*
FROM test_rum_hash
WHERE a @@ to_tsquery('pg_catalog.english', 'way')
ORDER BY a <=> to_tsquery('pg_catalog.english', 'way');
rum_ts_distance | rum_ts_score | t | a
-----------------+--------------+--------------------------------------------------------------------------+---------------------------------------------------------------
16.4493 | 0.0607927 | my appreciation of you in a more complimentary way than by sending this | 'appreci':2 'complimentari':8 'send':12 'way':9
16.4493 | 0.0607927 | itself. Put on your "specs" and look at the castle, half way up the | 'castl':10 'half':11 'look':7 'put':2 'spec':5 'way':12
16.4493 | 0.0607927 | so well that only a fragment, as it were, gave way. It still hangs as if | 'fragment':6 'gave':10 'hang':14 'still':13 'way':11 'well':2
16.4493 | 0.0607927 | thinking--"to go or not to go?" We are this far on the way. Reached | 'far':11 'go':3,7 'reach':15 'think':1 'way':14
(4 rows)
SELECT rum_ts_distance(a, to_tsquery('pg_catalog.english', 'way & (go | half)'))::numeric(10,4),
rum_ts_score(a, to_tsquery('pg_catalog.english', 'way & (go | half)'))::numeric(10,6),
*
FROM test_rum_hash
WHERE a @@ to_tsquery('pg_catalog.english', 'way & (go | half)')
ORDER BY a <=> to_tsquery('pg_catalog.english', 'way & (go | half)');
rum_ts_distance | rum_ts_score | t | a
-----------------+--------------+---------------------------------------------------------------------+---------------------------------------------------------
8.2247 | 0.121585 | itself. Put on your "specs" and look at the castle, half way up the | 'castl':10 'half':11 'look':7 'put':2 'spec':5 'way':12
57.5727 | 0.017369 | thinking--"to go or not to go?" We are this far on the way. Reached | 'far':11 'go':3,7 'reach':15 'think':1 'way':14
(2 rows)
SELECT
(a <=> to_tsquery('pg_catalog.english', 'way & (go | half)'))::numeric(10,4) AS distance,
rum_ts_distance(a, to_tsquery('pg_catalog.english', 'way & (go | half)'))::numeric(10,4),
rum_ts_score(a, to_tsquery('pg_catalog.english', 'way & (go | half)'))::numeric(10,6),
*
FROM test_rum_hash
ORDER BY a <=> to_tsquery('pg_catalog.english', 'way & (go | half)') limit 2;
distance | rum_ts_distance | rum_ts_score | t | a
----------+-----------------+--------------+---------------------------------------------------------------------+---------------------------------------------------------
8.2247 | 8.2247 | 0.121585 | itself. Put on your "specs" and look at the castle, half way up the | 'castl':10 'half':11 'look':7 'put':2 'spec':5 'way':12
57.5727 | 57.5727 | 0.017369 | thinking--"to go or not to go?" We are this far on the way. Reached | 'far':11 'go':3,7 'reach':15 'think':1 'way':14
(2 rows)
-- Check ranking normalization
SELECT rum_ts_distance(a, to_tsquery('pg_catalog.english', 'way'), 0)::numeric(10,4),
rum_ts_score(a, to_tsquery('pg_catalog.english', 'way'), 0)::numeric(10,7),
*
FROM test_rum_hash
WHERE a @@ to_tsquery('pg_catalog.english', 'way')
ORDER BY a <=> to_tsquery('pg_catalog.english', 'way');
rum_ts_distance | rum_ts_score | t | a
-----------------+--------------+--------------------------------------------------------------------------+---------------------------------------------------------------
16.4493 | 0.0607927 | my appreciation of you in a more complimentary way than by sending this | 'appreci':2 'complimentari':8 'send':12 'way':9
16.4493 | 0.0607927 | itself. Put on your "specs" and look at the castle, half way up the | 'castl':10 'half':11 'look':7 'put':2 'spec':5 'way':12
16.4493 | 0.0607927 | so well that only a fragment, as it were, gave way. It still hangs as if | 'fragment':6 'gave':10 'hang':14 'still':13 'way':11 'well':2
16.4493 | 0.0607927 | thinking--"to go or not to go?" We are this far on the way. Reached | 'far':11 'go':3,7 'reach':15 'think':1 'way':14
(4 rows)
SELECT rum_ts_distance(a, row(to_tsquery('pg_catalog.english', 'way & (go | half)'), 0)::rum_distance_query)::numeric(10,4),
rum_ts_score(a, row(to_tsquery('pg_catalog.english', 'way & (go | half)'), 0)::rum_distance_query)::numeric(10,6),
*
FROM test_rum_hash
WHERE a @@ to_tsquery('pg_catalog.english', 'way & (go | half)')
ORDER BY a <=> to_tsquery('pg_catalog.english', 'way & (go | half)');
rum_ts_distance | rum_ts_score | t | a
-----------------+--------------+---------------------------------------------------------------------+---------------------------------------------------------
8.2247 | 0.121585 | itself. Put on your "specs" and look at the castle, half way up the | 'castl':10 'half':11 'look':7 'put':2 'spec':5 'way':12
57.5727 | 0.017369 | thinking--"to go or not to go?" We are this far on the way. Reached | 'far':11 'go':3,7 'reach':15 'think':1 'way':14
(2 rows)
INSERT INTO test_rum_hash (t) VALUES ('foo bar foo the over foo qq bar');
INSERT INTO test_rum_hash (t) VALUES ('345 qwerty copyright');
INSERT INTO test_rum_hash (t) VALUES ('345 qwerty');
INSERT INTO test_rum_hash (t) VALUES ('A fat cat has just eaten a rat.');
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'bar');
count
-------
1
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'qwerty&345');
count
-------
2
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', '345');
count
-------
2
(1 row)
SELECT count(*) FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'rat');
count
-------
1
(1 row)
SELECT a FROM test_rum_hash WHERE a @@ to_tsquery('pg_catalog.english', 'bar') ORDER BY a;
a
------------------------------
'bar':2,8 'foo':1,3,6 'qq':7
(1 row)
-- Check full-index scan with order by
SELECT
CASE WHEN distance = 'Infinity' THEN -1
ELSE distance::numeric(10,4)
END distance
FROM
(SELECT a <=> to_tsquery('pg_catalog.english', 'ever|wrote') AS distance
FROM test_rum_hash ORDER BY a <=> to_tsquery('pg_catalog.english', 'ever|wrote')) t;
distance
----------
16.4493
16.4493
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
(56 rows)
CREATE TABLE tst_hash (i int4, t tsvector);
INSERT INTO tst_hash SELECT i%10, to_tsvector('simple', substr(md5(i::text), 1, 1)) FROM generate_series(1,100000) i;
CREATE INDEX tst_hashidx ON tst_hash USING rum (t rum_tsvector_hash_ops);
DELETE FROM tst_hash WHERE i = 1;
VACUUM tst_hash;
INSERT INTO tst_hash SELECT i%10, to_tsvector('simple', substr(md5(i::text), 1, 1)) FROM generate_series(10001,11000) i;
DELETE FROM tst_hash WHERE i = 2;
VACUUM tst_hash;
INSERT INTO tst_hash SELECT i%10, to_tsvector('simple', substr(md5(i::text), 1, 1)) FROM generate_series(11001,12000) i;
DELETE FROM tst_hash WHERE i = 3;
VACUUM tst_hash;
INSERT INTO tst_hash SELECT i%10, to_tsvector('simple', substr(md5(i::text), 1, 1)) FROM generate_series(12001,13000) i;
DELETE FROM tst_hash WHERE i = 4;
VACUUM tst_hash;
INSERT INTO tst_hash SELECT i%10, to_tsvector('simple', substr(md5(i::text), 1, 1)) FROM generate_series(13001,14000) i;
DELETE FROM tst_hash WHERE i = 5;
VACUUM tst_hash;
INSERT INTO tst_hash SELECT i%10, to_tsvector('simple', substr(md5(i::text), 1, 1)) FROM generate_series(14001,15000) i;
set enable_bitmapscan=off;
SET enable_indexscan=on;
explain (costs off)
SELECT a <=> to_tsquery('pg_catalog.english', 'w:*'), *
FROM test_rum_hash
WHERE a @@ to_tsquery('pg_catalog.english', 'w:*')
ORDER BY a <=> to_tsquery('pg_catalog.english', 'w:*');
QUERY PLAN
----------------------------------------------
Index Scan using rumhashidx on test_rum_hash
Index Cond: (a @@ '''w'':*'::tsquery)
Order By: (a <=> '''w'':*'::tsquery)
(3 rows)
SELECT a <=> to_tsquery('pg_catalog.english', 'w:*'), *
FROM test_rum_hash
WHERE a @@ to_tsquery('pg_catalog.english', 'w:*')
ORDER BY a <=> to_tsquery('pg_catalog.english', 'w:*');
ERROR: Compare with prefix expressions isn't supported
|
