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