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DROP TABLE IF EXISTS integers;
SET optimizer_switch='mrr_cost_based=off';
CREATE TABLE integers (
id INT PRIMARY KEY AUTO_INCREMENT,
value INT,
KEY (value)
) COMMENT='engine "InnoDB"';
INSERT INTO integers (value) VALUES (0), (1), (2), (3);
EXPLAIN SELECT * FROM integers
WHERE value IN (0, 2);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE integers range value value 5 NULL 2 Using where; Using MRR
SELECT * FROM integers
WHERE value IN (0, 2);
id value
1 0
3 2
DROP TABLE integers;
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