SET GLOBAL innodb_file_format='Barracuda';
SET GLOBAL innodb_file_per_table=on;
set old_alter_table=0;
CREATE TABLE bug53591(a text charset utf8 not null)
ENGINE=InnoDB KEY_BLOCK_SIZE=1;
ALTER TABLE bug53591 ADD PRIMARY KEY(a(220));
ERROR HY000: Too big row
SHOW WARNINGS;
Level	Code	Message
Error	139	Too big row
Error	1118	Row size too large (> 8126). Changing some columns to TEXT or BLOB may help. In current row format, BLOB prefix of 0 bytes is stored inline.
DROP TABLE bug53591;
SET GLOBAL innodb_file_format=Antelope;
SET GLOBAL innodb_file_per_table=0;