ALTER DATA DIRECTORY in PARTITIONS of InnoDB storage does nothing silently

CREATE TABLE t (

a INT NOT NULL

) ENGINE=INNODB

PARTITION BY HASH (a) (

PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here/' ENGINE = INNODB,

PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here/' ENGINE = INNODB

);

INSERT INTO t VALUES (1);

ALTER TABLE t REORGANIZE PARTITION p1,p2 INTO (

PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB,

PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_somewhere_else/' ENGINE = INNODB

);

SHOW CREATE TABLE t;

Table	Create Table

t	CREATE TABLE `t` (

  `a` int(11) NOT NULL

) ENGINE=InnoDB DEFAULT CHARSET=latin1

/*!50100 PARTITION BY HASH (a)

(PARTITION p1 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB,

 PARTITION p2 DATA DIRECTORY = 'MYSQLTEST_VARDIR/tmp/partitions_here' ENGINE = InnoDB) */

select * from t;

a

1

DROP TABLE t;