NHibernate Lazy=“Extra”

Question

Is there a good explanation out there on what exactly lazy=\"extra\" is capable of?

All the posts I\'ve seen all just repeat the fact that it turns references to

Answer 1

Just tried calling Any() on a Collection Customer.Orders mapped with lazy="extra"

customer.Orders.Any()

and the resulting SQL statement looked something like this (simplified):

SELECT *
FROM Order
WHERE CustomerId = 120

Whereas when calling

customer.Orders.Count > 0

the resulting SQL looked like this:

SELECT count(*)
FROM Order
WHERE CustomerId = 120