create table bug51378 (
col1 int not null,
col2 blob not null,
col3 time not null) engine = innodb;
create unique index idx on bug51378(col1, col2(31));
alter table bug51378 add unique index idx2(col1, col2(31));
create unique index idx3 on bug51378(col1, col3);
SHOW CREATE TABLE bug51378;
Table	Create Table
bug51378	CREATE TABLE `bug51378` (
  `col1` int(11) NOT NULL,
  `col2` blob NOT NULL,
  `col3` time NOT NULL,
  UNIQUE KEY `idx3` (`col1`,`col3`),
  UNIQUE KEY `idx` (`col1`,`col2`(31)),
  UNIQUE KEY `idx2` (`col1`,`col2`(31))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop index idx3 on bug51378;
SHOW CREATE TABLE bug51378;
Table	Create Table
bug51378	CREATE TABLE `bug51378` (
  `col1` int(11) NOT NULL,
  `col2` blob NOT NULL,
  `col3` time NOT NULL,
  UNIQUE KEY `idx` (`col1`,`col2`(31)),
  UNIQUE KEY `idx2` (`col1`,`col2`(31))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
alter table bug51378 add primary key idx3(col1, col2(31));
SHOW CREATE TABLE bug51378;
Table	Create Table
bug51378	CREATE TABLE `bug51378` (
  `col1` int(11) NOT NULL,
  `col2` blob NOT NULL,
  `col3` time NOT NULL,
  PRIMARY KEY (`col1`,`col2`(31)),
  UNIQUE KEY `idx` (`col1`,`col2`(31)),
  UNIQUE KEY `idx2` (`col1`,`col2`(31))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table bug51378;
create table bug51378 (
col1 int not null,
col2 blob not null,
col3 time not null, primary key(col1, col2(31))) engine = innodb;
create unique index idx on bug51378(col1, col2(31));
SHOW CREATE TABLE bug51378;
Table	Create Table
bug51378	CREATE TABLE `bug51378` (
  `col1` int(11) NOT NULL,
  `col2` blob NOT NULL,
  `col3` time NOT NULL,
  PRIMARY KEY (`col1`,`col2`(31)),
  UNIQUE KEY `idx` (`col1`,`col2`(31))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table bug51378;
create table bug51378 (
col1 int not null,
col2 int ) engine = innodb;
create unique index idx on bug51378(col1, col2);
SHOW CREATE TABLE bug51378;
Table	Create Table
bug51378	CREATE TABLE `bug51378` (
  `col1` int(11) NOT NULL,
  `col2` int(11) DEFAULT NULL,
  UNIQUE KEY `idx` (`col1`,`col2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table bug51378;
