How Does MyISAM Handle Transactions Despite Its Auto-Commit Nature?

Unveiling MyISAM's Transaction Handling

Transactions, a crucial component for maintaining data integrity, play a vital role in InnoDB tables. Intriguingly, testing these transactions on MyISAM tables yielded unexpected results. While initially assuming MyISAM's sequential execution would prevent atomic operations, the absence of errors during START TRANSACTION, COMMIT, and ROLLBACK suggested otherwise. This raises the question: How does the MyISAM engine handle these transactions?

Unlike InnoDB, which embraces a transactional architecture, MyISAM operates in a perpetual auto-commit mode. This implies that MyISAM inherently disregards commit and rollback operations. Consequently, all queries are executed independently, without the atomic guarantees associated with transactions.

The MySQL architecture segregates the storage engine layer from the SQL layer. Communication between these layers occurs via a low-level API, enabling a common SQL syntax while accommodating engines that provide varying feature sets.

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