How to selectively dump all innodb tables in a mysql database? - innodb

Question

I have a database called av2web, which contains 130 MyISAM tables and 20 innodb tables. I wanna take mysqldump of these 20 innodb tables, and export it to another database as MyISAM tables.
Can you tell me a quicker way to achieve this?
Thanks
Pedro Alvarez Espinoza.

Answer 1

If this was an one-off operation I'd do:
use DB;
show table status name where engine='innodb';
and do a rectangular copy/paste from the Name column:
+-----------+--------+---------+------------+-
| Name | Engine | Version | Row_format |
+-----------+--------+---------+------------+-
| countries | InnoDB | 10 | Compact |
| foo3 | InnoDB | 10 | Compact |
| foo5 | InnoDB | 10 | Compact |
| lol | InnoDB | 10 | Compact |
| people | InnoDB | 10 | Compact |
+-----------+--------+---------+------------+-
to a text editor and convert it to a command
mysqldump -u USER DB countries foo3 foo5 lol people > DUMP.sql
and then import after replacing all instances of ENGINE=InnoDB with ENGINE=MyISAM in DUMP.sql
If you want to avoid the rectangular copy/paste magic you can do something like:
use information_schema;
select group_concat(table_name separator ' ') from tables
where table_schema='DB' and engine='innodb';
which will return countries foo3 foo5 lol people

Answer 2

I know this is an old question. I just want to share this script that genrate the mysqldump command and also shows how to restore it
This following portion of the script will generate a command to create a mysql backup/dump
SET SESSION group_concat_max_len = 100000000; -- this is very important when you have lots of table to make sure all the tables get included
SET #userName = 'root'; -- the username that you will login with to generate the dump
SET #databaseName = 'my_database_name'; -- the database name to look up the tables from
SET #extraOptions = '--compact --compress'; -- any additional mydqldump options https://dev.mysql.com/doc/refman/5.6/en/mysqldump.html
SET #engineName = 'innodb'; -- the engine name to filter down the table by
SET #filename = '"D:/MySQL Backups/my_database_name.sql"'; -- the full path of where to generate the backup too
-- This query will generate the mysqldump command to generate the backup
SELECT
CASE WHEN tableNames IS NULL
THEN 'No tables found. Make sure you set the variables correctly.'
ELSE CONCAT_WS(' ','mysqldump -p -u', #userName, #databaseName, tableNames, #extraOptions, '>', #filename)
END AS command
FROM (
SELECT GROUP_CONCAT(table_name SEPARATOR ' ') AS tableNames
FROM INFORMATION_SCHEMA.TABLES
WHERE table_schema= #databaseName AND ENGINE= #engineName
) AS s;
This following portion of the script will generate a command to restore mysql backup/dump into a specific database on the same or a different server
SET #restoreIntoDatabasename = #databaseName; -- the name of the new database you wish to restore into
SET #restoreFromFile = #filename; -- the full path of the filename you want to restore from
-- This query will generate the command to use to restore the generated backup into mysql
SELECT CONCAT_WS(' ', 'mysql -p -u root', #restoreIntoDatabasename, '<', #restoreFromFile);