Comment 1 for bug 1399562

The same counts for ALTER TABLE statements which recreate the whole tablespace:

ip-10-36-36-72 mysql>
CREATE TABLE partitionedtable
(
        ID int unsigned not null auto_increment,
        col varchar(32) null,
        timer datetime not null,
        PRIMARY KEY(ID,timer)
)
ENGINE=InnoDB
PARTITION BY RANGE(YEAR(timer)) (
        PARTITION p2014 VALUES LESS THAN (2015)
                DATA DIRECTORY = '/tmp/partdb/2014',
        PARTITION p2015 VALUES LESS THAN (2016)
                DATA DIRECTORY = '/tmp/partdb/2015',
        PARTITION p2020 VALUES LESS THAN MAXVALUE
                DATA DIRECTORY = '/tmp/partdb/rest'
);

Query OK, 0 rows affected (0.07 sec)

ip-10-36-36-72 mysql> show create table partitionedtable\G
*************************** 1. row ***************************
       Table: partitionedtable
Create Table: CREATE TABLE `partitionedtable` (
  `ID` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `col` varchar(32) DEFAULT NULL,
  `timer` datetime NOT NULL,
  PRIMARY KEY (`ID`,`timer`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
/*!50100 PARTITION BY RANGE (YEAR(timer))
(PARTITION p2014 VALUES LESS THAN (2015) DATA DIRECTORY = '/tmp/partdb/2014' ENGINE = InnoDB,
 PARTITION p2015 VALUES LESS THAN (2016) DATA DIRECTORY = '/tmp/partdb/2015' ENGINE = InnoDB,
 PARTITION p2020 VALUES LESS THAN MAXVALUE DATA DIRECTORY = '/tmp/partdb/rest' ENGINE = InnoDB) */
1 row in set (0.00 sec)

[root@ip-10-36-36-72 partdb]# find /tmp/partdb/
/tmp/partdb/
/tmp/partdb/2014
/tmp/partdb/2014/test
/tmp/partdb/2014/test/partitionedtable#P#p2014.ibd
/tmp/partdb/2015
/tmp/partdb/2015/test
/tmp/partdb/2015/test/partitionedtable#P#p2015.ibd
/tmp/partdb/rest
/tmp/partdb/rest/test
/tmp/partdb/rest/test/partitionedtable#P#p2020.ibd

ip-10-36-36-72 mysql> alter table partitionedtable add extracol varchar(32) null;
Query OK, 0 rows affected (0.09 sec)
Records: 0 Duplicates: 0 Warnings: 0

[root@ip-10-36-36-72 partdb]# find /tmp/partdb/
/tmp/partdb/
/tmp/partdb/2014
/tmp/partdb/2014/test
/tmp/partdb/2015
/tmp/partdb/2015/test
/tmp/partdb/rest
/tmp/partdb/rest/test

[root@ip-10-36-36-72 partdb]# ls -alhs /var/lib/mysql/test/
total 316K
4.0K drwx------. 2 mysql mysql 4.0K Jan 16 13:21 .
4.0K drwxr-xr-x. 6 mysql mysql 4.0K Jan 16 10:28 ..
4.0K -rw-rw----. 1 mysql mysql 65 Jan 16 10:05 db.opt
 96K -rw-rw----. 1 mysql mysql 96K Jan 16 13:21 partitionedtable#P#p2014.ibd
 96K -rw-rw----. 1 mysql mysql 96K Jan 16 13:21 partitionedtable#P#p2015.ibd
 96K -rw-rw----. 1 mysql mysql 96K Jan 16 13:21 partitionedtable#P#p2020.ibd
 12K -rw-rw----. 1 mysql mysql 8.5K Jan 16 13:21 partitionedtable.frm
4.0K -rw-rw----. 1 mysql mysql 40 Jan 16 13:21 partitionedtable.par