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|
set enable_seqscan=off;
CREATE TABLE test_text (
i text
);
INSERT INTO test_text VALUES ('a'),('ab'),('abc'),('abb'),('axy'),('xyz');
CREATE INDEX idx_text ON test_text USING rum (i);
SELECT * FROM test_text WHERE i<'abc' ORDER BY i;
i
-----
a
ab
abb
(3 rows)
SELECT * FROM test_text WHERE i<='abc' ORDER BY i;
i
-----
a
ab
abb
abc
(4 rows)
SELECT * FROM test_text WHERE i='abc' ORDER BY i;
i
-----
abc
(1 row)
SELECT * FROM test_text WHERE i>='abc' ORDER BY i;
i
-----
abc
axy
xyz
(3 rows)
SELECT * FROM test_text WHERE i>'abc' ORDER BY i;
i
-----
axy
xyz
(2 rows)
CREATE TABLE test_text_o AS SELECT id::text, t FROM tsts;
SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id;
id
-----
135
16
168
232
252
354
355
371
39
(9 rows)
SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;
id
-----
406
415
428
457
458
484
496
71
(8 rows)
CREATE INDEX test_text_o_idx ON test_text_o USING rum
(t rum_tsvector_addon_ops, id)
WITH (attach = 'id', to = 't');
RESET enable_indexscan;
RESET enable_indexonlyscan;
SET enable_bitmapscan=OFF;
SET enable_seqscan = off;
EXPLAIN (costs off)
SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id;
QUERY PLAN
---------------------------------------------------------------------------------
Sort
Sort Key: id
-> Index Scan using test_text_o_idx on test_text_o
Index Cond: ((t @@ '''wr'' & ''qh'''::tsquery) AND (id <= '400'::text))
(4 rows)
SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id;
id
-----
135
16
168
232
252
354
355
371
39
(9 rows)
EXPLAIN (costs off)
SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;
QUERY PLAN
---------------------------------------------------------------------------------
Sort
Sort Key: id
-> Index Scan using test_text_o_idx on test_text_o
Index Cond: ((t @@ '''wr'' & ''qh'''::tsquery) AND (id >= '400'::text))
(4 rows)
SELECT id FROM test_text_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;
id
-----
406
415
428
457
458
484
496
71
(8 rows)
CREATE TABLE test_text_a AS SELECT id::text, t FROM tsts;
-- Should fail, temporarly it isn't allowed to order an index over pass-by-reference column
CREATE INDEX test_text_a_idx ON test_text_a USING rum
(t rum_tsvector_addon_ops, id)
WITH (attach = 'id', to = 't', order_by_attach='t');
ERROR: doesn't support order index over pass-by-reference column
EXPLAIN (costs off)
SELECT count(*) FROM test_text_a WHERE id < '400';
QUERY PLAN
------------------------------------
Aggregate
-> Seq Scan on test_text_a
Filter: (id < '400'::text)
(3 rows)
SELECT count(*) FROM test_text_a WHERE id < '400';
count
-------
337
(1 row)
EXPLAIN (costs off)
SELECT id FROM test_text_a WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id;
QUERY PLAN
-----------------------------------------------------------------------------
Sort
Sort Key: id
-> Seq Scan on test_text_a
Filter: ((t @@ '''wr'' & ''qh'''::tsquery) AND (id <= '400'::text))
(4 rows)
SELECT id FROM test_text_a WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id;
id
-----
135
16
168
232
252
354
355
371
39
(9 rows)
EXPLAIN (costs off)
SELECT id FROM test_text_a WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;
QUERY PLAN
-----------------------------------------------------------------------------
Sort
Sort Key: id
-> Seq Scan on test_text_a
Filter: ((t @@ '''wr'' & ''qh'''::tsquery) AND (id >= '400'::text))
(4 rows)
SELECT id FROM test_text_a WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;
id
-----
406
415
428
457
458
484
496
71
(8 rows)
CREATE TABLE test_text_h_o AS SELECT id::text, t FROM tsts;
CREATE INDEX test_text_h_o_idx ON test_text_h_o USING rum
(t rum_tsvector_hash_addon_ops, id)
WITH (attach = 'id', to = 't');
EXPLAIN (costs off)
SELECT id FROM test_text_h_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id;
QUERY PLAN
---------------------------------------------------------------------------------
Sort
Sort Key: id
-> Index Scan using test_text_h_o_idx on test_text_h_o
Index Cond: ((t @@ '''wr'' & ''qh'''::tsquery) AND (id <= '400'::text))
(4 rows)
SELECT id FROM test_text_h_o WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id;
id
-----
135
16
168
232
252
354
355
371
39
(9 rows)
EXPLAIN (costs off)
SELECT id FROM test_text_h_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;
QUERY PLAN
---------------------------------------------------------------------------------
Sort
Sort Key: id
-> Index Scan using test_text_h_o_idx on test_text_h_o
Index Cond: ((t @@ '''wr'' & ''qh'''::tsquery) AND (id >= '400'::text))
(4 rows)
SELECT id FROM test_text_h_o WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;
id
-----
406
415
428
457
458
484
496
71
(8 rows)
CREATE TABLE test_text_h_a AS SELECT id::text, t FROM tsts;
-- Should fail, temporarly it isn't allowed to order an index over pass-by-reference column
CREATE INDEX test_text_h_a_idx ON test_text_h_a USING rum
(t rum_tsvector_hash_addon_ops, id)
WITH (attach = 'id', to = 't', order_by_attach='t');
ERROR: doesn't support order index over pass-by-reference column
EXPLAIN (costs off)
SELECT count(*) FROM test_text_h_a WHERE id < '400';
QUERY PLAN
------------------------------------
Aggregate
-> Seq Scan on test_text_h_a
Filter: (id < '400'::text)
(3 rows)
SELECT count(*) FROM test_text_h_a WHERE id < '400';
count
-------
337
(1 row)
EXPLAIN (costs off)
SELECT id FROM test_text_h_a WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id;
QUERY PLAN
-----------------------------------------------------------------------------
Sort
Sort Key: id
-> Seq Scan on test_text_h_a
Filter: ((t @@ '''wr'' & ''qh'''::tsquery) AND (id <= '400'::text))
(4 rows)
SELECT id FROM test_text_h_a WHERE t @@ 'wr&qh' AND id <= '400' ORDER BY id;
id
-----
135
16
168
232
252
354
355
371
39
(9 rows)
EXPLAIN (costs off)
SELECT id FROM test_text_h_a WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;
QUERY PLAN
-----------------------------------------------------------------------------
Sort
Sort Key: id
-> Seq Scan on test_text_h_a
Filter: ((t @@ '''wr'' & ''qh'''::tsquery) AND (id >= '400'::text))
(4 rows)
SELECT id FROM test_text_h_a WHERE t @@ 'wr&qh' AND id >= '400' ORDER BY id;
id
-----
406
415
428
457
458
484
496
71
(8 rows)
|
