PolarDB-for-PostgreSQL

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set enable_seqscan=off;
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CREATE TYPE rainbow AS ENUM ('r','o','y','g','b','i','v');
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CREATE TABLE test_enum (
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   i rainbow
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);
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INSERT INTO test_enum VALUES ('v'),('y'),('r'),('g'),('o'),('i'),('b');
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CREATE INDEX idx_enum ON test_enum USING gin (i);
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SELECT * FROM test_enum WHERE i<'g'::rainbow ORDER BY i;
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SELECT * FROM test_enum WHERE i<='g'::rainbow ORDER BY i;
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SELECT * FROM test_enum WHERE i='g'::rainbow ORDER BY i;
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SELECT * FROM test_enum WHERE i>='g'::rainbow ORDER BY i;
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SELECT * FROM test_enum WHERE i>'g'::rainbow ORDER BY i;
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explain (costs off) SELECT * FROM test_enum WHERE i>='g'::rainbow ORDER BY i;
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-- make sure we handle the non-evenly-numbered oid case for enums
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create type e as enum ('0', '2', '3');
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alter type e add value '1' after '0';
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create table t as select (i % 4)::text::e from generate_series(0, 100000) as i;
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create index on t using gin (e);
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