What are hierarchic locks?

Hierarchic locks are a type of locking mechanism used in database systems to manage access to data while maintaining consistency and integrity. They organize locks in a hierarchy, allowing a transaction to acquire locks at various levels, such as at the database, table, or row level, depending on its needs. This approach helps to reduce contention and improve performance by enabling finer-grained locking, while also preventing issues like deadlocks. Hierarchic locks are particularly useful in environments with complex data structures and concurrent access requirements.