MySQL

SQL transactions and inspection with a polling-first worker path.

MySQL implements the same core store and admission behavior as PostgreSQL. It supports application transactions and the bounded inspection surface, but it has no equivalent of PostgreSQL LISTEN/NOTIFY, so workers poll with exponential empty-queue backoff.

Important differences

• No partial indexes; active uniqueness uses generated nullable columns.
• No push wakeup capability; polling is honest and first-class.
• Migration locking is scoped with a configurable namespace.
• Database-level instance isolation replaces PostgreSQL schema isolation.

The cross-language conformance corpus compares MySQL behavior with PostgreSQL and Redis. Backend-specific verification status is recorded in the capability and MySQL ledgers.

Migration runbook