Function with_migration_lock 

pub async fn with_migration_lock<T, F>(
    database: &DatabaseConnection,
    options: &MigrationLockOptions,
    operation: F,
) -> Result<T, DbErr>
where
    F: for<'a> FnOnce(DatabaseExecutor<'a>) -> MigrationFuture<'a, T>,

Runs a product migration callback while holding the backend’s process-wide migration lock.

PostgreSQL acquires a session advisory lock without opening a waiting transaction; the callback is transactional unless explicitly disabled in the options. MySQL uses a dedicated session and named lock without a DDL transaction. SQLite runs the callback in a transaction without an additional external lock.

Errors

Returns an error when lock options are invalid, the backend is unsupported, connection, transaction, or lock operations fail, the callback fails, or transactional finalization fails.