Best way to implement functionality similar to lazy=“extra” using NHibernate 2.0.1?

When you say its a performance problem for other users, do you mean they also want to access the collection, but its too large for them. Or is the code snippet/ChildCollectionCount too slow for them?

When you say its a performance problem for other users, do you mean they also want to access the collection, but its too large for them. Or is the code snippet/ChildCollectionCount too slow for them? If its the first case, then perhaps you need to do a similar solution for them - identify exactly what they need and provide methods that offer that facility.

Very late, but you can apply a filter on the collection IQuery q = nhSession. CreateFilter(Parent. ChildCollection, "select count(*)"); long countResult = q.UniqueResult(); this will not force an initialization of the collection but instead perform a single query to the db.

I would recommend a seperate query, rather than a domain relationship. Then you can use all sorts of optimisations.

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