在MySQL中，最佳实践是将LOCK TABLES调用包装在try catch中吗？

Question

执行“ LOCK TABLES”时，将调用包装在try / catch中是否明智，以确保在发生异常的情况下对表进行解锁？

Answer 1

In general it's a good idea to use try { } catch for operations that require undoing a previous operation in case of any errors; it's not limited to just database statements.

That said, when using databases, it's advisable to use a more granular locking mechanism such as the one that comes with transactional databases such as InnoDB. You would still use try { } catch , but in this manner:

// start a new transaction
$db->beginTransaction();
try {
    // do stuff
    // make the changes permament
    $db->commit();
} catch (Exception $e) {
    // roll back any changes you've made
    $db->rollback();
    throw $e;
}

The exact behaviour of conflict resolution is defined by the transaction isolation level, which can be changed to suit your needs.