Advisory Locking vs. Unique Constraints for Retry-safe Writes in Perl DBI
Goal: guarantee that a write operation retried after a transient error does not create duplicate rows in the database when using Perl’s DBI. Constraints: Advisory locks (e.g., DBI->do('SELECT pg_advisory_lock(...)')) serialize concurrent retries and prevent duplicates but can cause deadlocks if a lock is held too long or not released promptly. Unique cons
perl