# Converting from MyISAM to InnoDB
# Basic conversion
ALTER TABLE foo ENGINE=InnoDB;
This converts the table, but does not take care of any differences between the engines. Most differences will not matter, especially for small tables. But for busier tables, other considerations should be considered. Conversion considerations (opens new window)
# Converting All Tables in one Database
To easily convert all tables in one database, use the following:
SET @DB_NAME = DATABASE(); SELECT CONCAT('ALTER TABLE `', table_name, '` ENGINE=InnoDB;') AS sql_statements FROM information_schema.tables WHERE table_schema = @DB_NAME AND `ENGINE` = 'MyISAM' AND `TABLE_TYPE` = 'BASE TABLE';
NOTE: You should be connected to your database for
DATABASE() function to work, otherwise it will return
NULL. This mostly applies to standard mysql client shipped with server as it allows to connect without specifying a database.
Run this SQL statement to retrieve all the
MyISAM tables in your database.
Finally, copy the output and execute SQL queries from it.