mirror of
https://github.com/postgres/postgres.git
synced 2025-10-29 22:49:41 +03:00
4b95cc1dc3
This is preparation for a future patch to extensively change how reloptions work. Author: Nikolay Shaplov Reviewed-by: Michael Paquier Discussion: https://postgr.es/m/2615372.orqtEn8VGB@x200m
95 lines
2.7 KiB
SQL
95 lines
2.7 KiB
SQL
CREATE EXTENSION bloom;
|
|
|
|
CREATE TABLE tst (
|
|
i int4,
|
|
t text
|
|
);
|
|
|
|
INSERT INTO tst SELECT i%10, substr(md5(i::text), 1, 1) FROM generate_series(1,2000) i;
|
|
CREATE INDEX bloomidx ON tst USING bloom (i, t) WITH (col1 = 3);
|
|
|
|
SET enable_seqscan=on;
|
|
SET enable_bitmapscan=off;
|
|
SET enable_indexscan=off;
|
|
|
|
SELECT count(*) FROM tst WHERE i = 7;
|
|
SELECT count(*) FROM tst WHERE t = '5';
|
|
SELECT count(*) FROM tst WHERE i = 7 AND t = '5';
|
|
|
|
SET enable_seqscan=off;
|
|
SET enable_bitmapscan=on;
|
|
SET enable_indexscan=on;
|
|
|
|
EXPLAIN (COSTS OFF) SELECT count(*) FROM tst WHERE i = 7;
|
|
EXPLAIN (COSTS OFF) SELECT count(*) FROM tst WHERE t = '5';
|
|
EXPLAIN (COSTS OFF) SELECT count(*) FROM tst WHERE i = 7 AND t = '5';
|
|
|
|
SELECT count(*) FROM tst WHERE i = 7;
|
|
SELECT count(*) FROM tst WHERE t = '5';
|
|
SELECT count(*) FROM tst WHERE i = 7 AND t = '5';
|
|
|
|
DELETE FROM tst;
|
|
INSERT INTO tst SELECT i%10, substr(md5(i::text), 1, 1) FROM generate_series(1,2000) i;
|
|
VACUUM ANALYZE tst;
|
|
|
|
SELECT count(*) FROM tst WHERE i = 7;
|
|
SELECT count(*) FROM tst WHERE t = '5';
|
|
SELECT count(*) FROM tst WHERE i = 7 AND t = '5';
|
|
|
|
DELETE FROM tst WHERE i > 1 OR t = '5';
|
|
VACUUM tst;
|
|
INSERT INTO tst SELECT i%10, substr(md5(i::text), 1, 1) FROM generate_series(1,2000) i;
|
|
|
|
SELECT count(*) FROM tst WHERE i = 7;
|
|
SELECT count(*) FROM tst WHERE t = '5';
|
|
SELECT count(*) FROM tst WHERE i = 7 AND t = '5';
|
|
|
|
VACUUM FULL tst;
|
|
|
|
SELECT count(*) FROM tst WHERE i = 7;
|
|
SELECT count(*) FROM tst WHERE t = '5';
|
|
SELECT count(*) FROM tst WHERE i = 7 AND t = '5';
|
|
|
|
-- Try an unlogged table too
|
|
|
|
CREATE UNLOGGED TABLE tstu (
|
|
i int4,
|
|
t text
|
|
);
|
|
|
|
INSERT INTO tstu SELECT i%10, substr(md5(i::text), 1, 1) FROM generate_series(1,2000) i;
|
|
CREATE INDEX bloomidxu ON tstu USING bloom (i, t) WITH (col2 = 4);
|
|
|
|
SET enable_seqscan=off;
|
|
SET enable_bitmapscan=on;
|
|
SET enable_indexscan=on;
|
|
|
|
EXPLAIN (COSTS OFF) SELECT count(*) FROM tstu WHERE i = 7;
|
|
EXPLAIN (COSTS OFF) SELECT count(*) FROM tstu WHERE t = '5';
|
|
EXPLAIN (COSTS OFF) SELECT count(*) FROM tstu WHERE i = 7 AND t = '5';
|
|
|
|
SELECT count(*) FROM tstu WHERE i = 7;
|
|
SELECT count(*) FROM tstu WHERE t = '5';
|
|
SELECT count(*) FROM tstu WHERE i = 7 AND t = '5';
|
|
|
|
RESET enable_seqscan;
|
|
RESET enable_bitmapscan;
|
|
RESET enable_indexscan;
|
|
|
|
-- Run amvalidator function on our opclasses
|
|
SELECT opcname, amvalidate(opc.oid)
|
|
FROM pg_opclass opc JOIN pg_am am ON am.oid = opcmethod
|
|
WHERE amname = 'bloom'
|
|
ORDER BY 1;
|
|
|
|
--
|
|
-- relation options
|
|
--
|
|
DROP INDEX bloomidx;
|
|
CREATE INDEX bloomidx ON tst USING bloom (i, t) WITH (length=7, col1=4);
|
|
SELECT reloptions FROM pg_class WHERE oid = 'bloomidx'::regclass;
|
|
-- check for min and max values
|
|
\set VERBOSITY terse
|
|
CREATE INDEX bloomidx2 ON tst USING bloom (i, t) WITH (length=0);
|
|
CREATE INDEX bloomidx2 ON tst USING bloom (i, t) WITH (col1=0);
|