OCC in Delta Lake allows all transactions to proceed without any checks, leading to frequent conflicts and data inconsistencies.

Delta Lake’s OCC assumes that conflicts are rare and allows transactions to proceed optimistically. Conflicts occur when multiple transactions try to modify the same data simultaneously, leading to a need for rollback and retry.

OCC in Delta Lake only applies to read transactions, and write transactions do not use OCC, leading to potential data inconsistencies.

Delta Lake does not use OCC; it relies solely on locking mechanisms to prevent conflicts.