37 lines
951 B
SQL
37 lines
951 B
SQL
|
|
SET enable_seqscan to false;
|
|
|
|
-- test search for "not equals"
|
|
|
|
CREATE TABLE test_ne (
|
|
a TIMESTAMP,
|
|
b NUMERIC
|
|
);
|
|
CREATE INDEX test_ne_idx ON test_ne USING gist (a, b);
|
|
|
|
INSERT INTO test_ne SELECT '2009-01-01', 10.7 FROM generate_series(1,1000);
|
|
INSERT INTO test_ne VALUES('2007-02-03', -91.3);
|
|
INSERT INTO test_ne VALUES('2011-09-01', 43.7);
|
|
INSERT INTO test_ne SELECT '2009-01-01', 10.7 FROM generate_series(1,1000);
|
|
|
|
SET enable_indexscan to false;
|
|
|
|
EXPLAIN (COSTS OFF) SELECT * FROM test_ne WHERE a <> '2009-01-01' AND b <> 10.7;
|
|
|
|
SELECT * FROM test_ne WHERE a <> '2009-01-01' AND b <> 10.7;
|
|
|
|
RESET enable_indexscan;
|
|
|
|
-- test search for "not equals" using an exclusion constraint
|
|
|
|
CREATE TABLE zoo (
|
|
cage INTEGER,
|
|
animal TEXT,
|
|
EXCLUDE USING gist (cage WITH =, animal WITH <>)
|
|
);
|
|
|
|
INSERT INTO zoo VALUES(123, 'zebra');
|
|
INSERT INTO zoo VALUES(123, 'zebra');
|
|
INSERT INTO zoo VALUES(123, 'lion');
|
|
INSERT INTO zoo VALUES(124, 'lion');
|