deferrability
Deferrability is a concept in database management systems that relates to the timing of constraint checking. When a constraint is deferred, its enforcement is postponed until the end of the transaction, rather than being checked immediately after the statement that might violate it. This allows for temporary states that would otherwise be invalid to exist within a single transaction, as long as the constraint is satisfied by the time the transaction commits.
This mechanism is particularly useful in complex transactional scenarios where multiple operations need to occur in
The ability to defer constraints can improve performance in certain situations by reducing the overhead of