Does MyISAM Support Transactions?

Understanding MyISAM Engine Transaction Support

Question:

Can MyISAM tables support transactions, like InnoDB tables do?

Answer:

MyISAM, unlike InnoDB, is a non-transactional storage engine in MySQL. However, it does have a surprising behavior when it comes to transaction commands.

Explanation:

• Auto-Commit Mode: MyISAM operates in auto-commit mode, meaning that every statement is executed immediately and committed to the database.
• Ignored Transaction Commands: When transaction commands (START TRANSACTION, COMMIT, ROLLBACK) are encountered in a MyISAM table, they are simply ignored.
• Reason for Lack of Transactions: MyISAM tables are designed for performance and speed. Transactions would introduce overhead and limit concurrency.
• Storage Engine Communication: The SQL parser communicates with storage engines like MyISAM through a low-level API. This allows for a common SQL syntax, while engines implement features differently.

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