CREATE TABLE `d_messages` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `concrete_message_type` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
  `concrete_message_id` int(11) DEFAULT NULL,
  `sent_at` int(11) unsigned DEFAULT NULL,
  PRIMARY KEY (`id`,`sent_at`),
  KEY `index_messages_on_concrete_message_id` (`concrete_message_id`),
  KEY `sent_at_index` (`sent_at`)
) ENGINE=InnoDB CHARSET=utf8 COLLATE=utf8_unicode_ci
PARTITION BY RANGE (sent_at) (
    PARTITION p122009 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-01-01 00:00:00') ),
    PARTITION p012010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-02-01 00:00:00') ),
    PARTITION p022010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-03-01 00:00:00') ),
    PARTITION p032010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-04-01 00:00:00') ),
    PARTITION p042010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-05-01 00:00:00') ),
    PARTITION p052010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-06-01 00:00:00') ),
    PARTITION p062010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-07-01 00:00:00') ),
    PARTITION p072010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-08-01 00:00:00') ),
    PARTITION p082010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-09-01 00:00:00') ),
    PARTITION p092010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-10-01 00:00:00') ),
    PARTITION p102010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-11-01 00:00:00') ),
    PARTITION p112010 VALUES LESS THAN ( UNIX_TIMESTAMP('2010-12-01 00:00:00') ),
    PARTITION p122010 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-01-01 00:00:00') ),
    PARTITION p012011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-02-01 00:00:00') ),
    PARTITION p022011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-03-01 00:00:00') ),
    PARTITION p032011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-04-01 00:00:00') ),
    PARTITION p042011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-05-01 00:00:00') ),
    PARTITION p052011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-06-01 00:00:00') ),
    PARTITION p062011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-07-01 00:00:00') ),
    PARTITION p072011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-08-01 00:00:00') ),
    PARTITION p082011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-09-01 00:00:00') ),
    PARTITION p092011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-10-01 00:00:00') ),
    PARTITION p102011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-11-01 00:00:00') ),
    PARTITION p112011 VALUES LESS THAN ( UNIX_TIMESTAMP('2011-12-01 00:00:00') ),
    PARTITION p122011 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-01-01 00:00:00') ),
    PARTITION p012012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-02-01 00:00:00') ),
    PARTITION p022012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-03-01 00:00:00') ),
    PARTITION p032012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-04-01 00:00:00') ),
    PARTITION p042012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-05-01 00:00:00') ),
    PARTITION p052012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-06-01 00:00:00') ),
    PARTITION p062012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-07-01 00:00:00') ),
    PARTITION p072012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-08-01 00:00:00') ),
    PARTITION p082012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-09-01 00:00:00') ),
    PARTITION p092012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-10-01 00:00:00') ),
    PARTITION p102012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-11-01 00:00:00') ),
    PARTITION p112012 VALUES LESS THAN ( UNIX_TIMESTAMP('2012-12-01 00:00:00') ),
    PARTITION p122012 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-01-01 00:00:00') ),
    PARTITION p012013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-02-01 00:00:00') ),
    PARTITION p022013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-03-01 00:00:00') ),
    PARTITION p032013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-04-01 00:00:00') ),
    PARTITION p042013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-05-01 00:00:00') ),
    PARTITION p052013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-06-01 00:00:00') ),
    PARTITION p062013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-07-01 00:00:00') ),
    PARTITION p072013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-08-01 00:00:00') ),
    PARTITION p082013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-09-01 00:00:00') ),
    PARTITION p092013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-10-01 00:00:00') ),
    PARTITION p102013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-11-01 00:00:00') ),
    PARTITION p112013 VALUES LESS THAN ( UNIX_TIMESTAMP('2013-12-01 00:00:00') )
);