Does MyISAM Support Transactions: Ignore or Execute?

Transaction Support in MyISAM: Ignores or Performs Actions?

While exploring transaction support in InnoDB tables, one may wonder about its behavior in MyISAM. Surprisingly, executing the same transaction on a MyISAM table also appears to work. However, it raises questions about what actually happens in this case.

MyISAM's Transaction Handling

Unlike InnoDB, MyISAM is a non-transactional engine. It operates in auto-commit mode, meaning each query is committed individually. This behavior applies to START TRANSACTION, COMMIT, and ROLLBACK operations as well.

Ignoring or Performing Actions?

To answer the question, MyISAM ignores these transaction commands. It does not perform any specific actions based on them. The queries within the transaction are still executed sequentially, but they are not treated as an atomic unit.

Architecture Perspective

The storage engine is a distinct layer in MySQL's architecture, separated from the SQL parser. The SQL layer communicates with the storage engine using a lower-level API. This separation allows for common SQL semantics across engines, even those that support different subsets of features.

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