1set enable_seqscan=off;
2
3CREATE TABLE test_varchar (
4	i varchar
5);
6
7INSERT INTO test_varchar VALUES ('a'),('ab'),('abc'),('abb'),('axy'),('xyz');
8
9CREATE INDEX idx_varchar ON test_varchar USING gin (i);
10
11SELECT * FROM test_varchar WHERE i<'abc'::varchar ORDER BY i;
12SELECT * FROM test_varchar WHERE i<='abc'::varchar ORDER BY i;
13SELECT * FROM test_varchar WHERE i='abc'::varchar ORDER BY i;
14SELECT * FROM test_varchar WHERE i>='abc'::varchar ORDER BY i;
15SELECT * FROM test_varchar WHERE i>'abc'::varchar ORDER BY i;
16