DROP TABLE IF EXISTS t, ti; SET SESSION TOKUDB_DISABLE_SLOW_ALTER=1; SET SESSION DEFAULT_STORAGE_ENGINE='TokuDB'; CREATE TABLE t (a BINARY(4), b BINARY(4), c BINARY(4), KEY(b), id INT PRIMARY KEY); INSERT INTO t VALUES ('a','b','c',1),('d','e','f',2),('g','h','i',3); CREATE TABLE ti LIKE t; ALTER TABLE ti ENGINE=myisam; INSERT INTO ti SELECT * FROM t; ALTER TABLE t CHANGE COLUMN a a BINARY(255); ALTER TABLE ti CHANGE COLUMN a a BINARY(255); SELECT HEX(b) FROM t; HEX(b) 62000000 65000000 68000000 SELECT HEX(b) FROM ti; HEX(b) 62000000 65000000 68000000 INSERT INTO t VALUES ('j','k','l',4); INSERT INTO ti VALUES ('j','k','l',4); SELECT HEX(b) FROM t; HEX(b) 62000000 65000000 68000000 6B000000 SELECT HEX(b) FROM ti; HEX(b) 62000000 65000000 68000000 6B000000 include/diff_tables.inc [test.t, test.ti] DROP TABLE t, ti;