1CREATE TABLE t1(a INT UNSIGNED,
2PRIMARY KEY USING HASH (a))
3ENGINE=INNODB default CHARSET=utf8 COLLATE=utf8_unicode_ci;
4INSERT INTO t1 VALUES(1);
5ALTER TABLE t1 MODIFY a CHAR(1);
6ALTER TABLE t1 ROW_FORMAT=REDUNDANT;
7DELETE FROM t1;
8DROP TABLE t1;
9