What is pessimistic locking in SQL?
Pessimistic locking is a concurrency control method that locks a record for exclusive access, preventing other transactions from modifying it until the lock is released.
When should I use pessimistic locking?
You should use pessimistic locking when you expect high contention for a resource, ensuring data integrity by preventing conflicts.
What are the downsides of using pessimistic locking?
The downsides include potential performance bottlenecks and reduced concurrency, as other transactions must wait for the lock to be released.
Can you give an example of how to implement it in SQL?
Sure! In SQL, you can use the SELECT ... FOR UPDATE
statement to lock the selected rows for updates.
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