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