MySQL supports several storage engines that act as handlers for different table types. MySQL storage engines include both those that handle transaction-safe tables and those that handle non-transaction-safe tables:
The original storage engine was
ISAM, which managed non-transactional tables. This engine has been replaced by
MyISAM and should no longer be used. It is deprecated in MySQL 4.1, and will be removed in MySQL 5.0.
In MySQL 3.23.0, the
HEAP storage engines were introduced.