Row-Level Locking Strategies
Explore advanced strategies for managing row-level locks to optimize concurrent writes.
Why Row-Level Locking?
When multiple users or processes try to change the same data at the same time, databases need a way to prevent conflicts and ensure data integrity. This is where row-level locking comes in.
A row-level lock allows a transaction to claim exclusive or shared access to specific rows, preventing other transactions from making conflicting changes until the lock is released. It's crucial for high-concurrency applications.
Implicit Row Locks
PostgreSQL automatically applies row-level locks during Data Manipulation Language (DML) operations like INSERT, UPDATE, and DELETE.
INSERT: Places an exclusive lock on the newly inserted row.UPDATE: Places an exclusive lock on the row being modified.DELETE: Places an exclusive lock on the row being deleted.
These implicit locks ensure that only one transaction can modify a specific row at a time.