PolarDB-for-PostgreSQL

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set enable_seqscan=off;
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CREATE TABLE test_char (
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	i "char"
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);
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INSERT INTO test_char VALUES ('a'),('b'),('c'),('d'),('e'),('f');
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CREATE INDEX idx_char ON test_char USING gin (i);
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SELECT * FROM test_char WHERE i<'d'::"char" ORDER BY i;
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SELECT * FROM test_char WHERE i<='d'::"char" ORDER BY i;
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SELECT * FROM test_char WHERE i='d'::"char" ORDER BY i;
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SELECT * FROM test_char WHERE i>='d'::"char" ORDER BY i;
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SELECT * FROM test_char WHERE i>'d'::"char" ORDER BY i;
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