PostgreSQL 18 introduces temporal constraints that simplify managing time-related data, allowing developers to maintain referential integrity across temporal relationships with ease. By utilizing GiST indexes and the WITHOUT OVERLAPS constraint, developers can efficiently handle overlapping time periods in applications without complex coding.

• PostgreSQL 18 adds native temporal constraints, letting the database enforce non-overlapping time ranges without custom application logic
• The WITHOUT OVERLAPS clause combined with GiST indexes enables primary/unique keys and foreign keys that account for time periods
• This allows referential integrity to be maintained across temporal relationships (e.g., preventing overlapping bookings or contracts) directly at the database level