-- e.g.:
rename table test_table1 to test_table2;
alter table test_table change c1 c2 int(10); 

~/merge_schema (master) $ python merge_schema.py -f from_schema.sql -t to_schema.sql -o merge_alters.sql
-- del_table
drop table del_table;
 
-- add_table
CREATE TABLE `add_table` (
  `id` int(11) NOT NULL,
  `c1` int(11) DEFAULT NULL,
  `c2` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
 
-- del_key
alter table `del_key` drop key ind_c1;
 
-- add_fulltext
alter table `add_fulltext` add FULLTEXT KEY `ft_c1` (`c1`);
 
-- del_column
alter table `del_column` drop column `c3`;
 
-- add_key
alter table `add_key` add KEY `ind_c` (`c1`,`c2`);
 
-- del_fulltext
alter table `del_fulltext` drop fulltext key `ft_c1`;
 
-- mod_option
alter table `mod_option` ENGINE=BLACKHOLE DEFAULT CHARSET=utf8;
 
-- add_primary
alter table `add_primary` add PRIMARY KEY (`id`);
 
-- mod_column
alter table `mod_column` modify column `c1` char(16) DEFAULT NULL;
 
-- mod_key
alter table `mod_key` drop key ind_c;
alter table `mod_key` add KEY `ind_c` (`c1`,`c2`);
 
-- del_foreign
alter table `del_foreign` drop foreign key `fk_id2`;
 
-- add_unique
alter table `add_unique` add UNIQUE KEY `unq_c1` (`c1`);
 
-- mod_foreign
alter table `mod_foreign` drop foreign key `fk_id1`;
alter table `mod_foreign` add CONSTRAINT `fk_id1` FOREIGN KEY (`id`) REFERENCES `del_foreign` (`id`);
 
-- mod_fulltext
alter table `mod_fulltext` drop fulltext key `ft_c`;
alter table `mod_fulltext` add FULLTEXT KEY `ft_c` (`c1`,`c2`);
 
-- add_column
alter table `add_column` add column ``c3` int(11) DEFAULT NULL`;
 
-- del_unique
alter table `del_unique` drop unique key unq_c1;
 
-- del_primary
alter table `del_primary` drop primary key;
 
-- mod_unique
alter table `mod_unique` drop unique key unq_c;
alter table `mod_unique` add UNIQUE KEY `unq_c` (`c1`,`c2`);
 
-- mod_primary
alter table `mod_primary` drop primary key;
alter table `mod_primary` add PRIMARY KEY (`id`,`c1`);
 
-- add_foreign
alter table `add_foreign` add CONSTRAINT `fk_id2` FOREIGN KEY (`id`) REFERENCES `del_foreign` (`id`);