DROP TABLE IF EXISTS s,t; SET DEFAULT_STORAGE_ENGINE='TokuDB'; CREATE TABLE s (a BINARY(1)); INSERT INTO s VALUES (1),(2),(3); CREATE TABLE t LIKE s; INSERT INTO t SELECT * FROM s; SET TOKUDB_DISABLE_HOT_ALTER=0; ALTER TABLE s CHANGE COLUMN a a BINARY(2); SELECT HEX(a) FROM s; HEX(a) 3100 3200 3300 SET TOKUDB_DISABLE_HOT_ALTER=1; ALTER TABLE t CHANGE COLUMN a a BINARY(2); SELECT HEX(a) FROM t; HEX(a) 3100 3200 3300 DROP TABLE s,t;