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set enable_seqscan=off;
CREATE TABLE test_bool (
i boolean
);
INSERT INTO test_bool VALUES (false),(true),(null);
CREATE INDEX idx_bool ON test_bool USING gin (i);
SELECT * FROM test_bool WHERE i<true ORDER BY i;
SELECT * FROM test_bool WHERE i<=true ORDER BY i;
SELECT * FROM test_bool WHERE i=true ORDER BY i;
SELECT * FROM test_bool WHERE i>=true ORDER BY i;
SELECT * FROM test_bool WHERE i>true ORDER BY i;
SELECT * FROM test_bool WHERE i<false ORDER BY i;
SELECT * FROM test_bool WHERE i<=false ORDER BY i;
SELECT * FROM test_bool WHERE i=false ORDER BY i;
SELECT * FROM test_bool WHERE i>=false ORDER BY i;
SELECT * FROM test_bool WHERE i>false ORDER BY i;
EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i<true ORDER BY i;
EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i<=true ORDER BY i;
EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i=true ORDER BY i;
EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i>=true ORDER BY i;
EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i>true ORDER BY i;
-- probably sufficient to check just this one:
EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i=false ORDER BY i;
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