Question

Is there a way to specify additional conditions on outer joins in NHibernate when querying using QueryOver or ICriteria?

I need some extra conditions on the outer join-ed table, but NHibernate always adds them to the WHERE clause at the end – which does not get the correct behaviour (see http://weblogs.sqlteam.com/jeffs/archive/2007/05/14/criteria-on-outer-joined-tables.aspx).

I can’t seem to find any way to do this using Criteria or the QueryOver syntax…

Thanks

Answer 1

(Answered my own question – sorry!)

Fabio answered a similar query on the NHibernate list – just thought I’d post it here.

That is possible with Criteria since NH3.0.
The feature in HQL
http://fabiomaulo.blogspot.com/2009/05/nhibernate-210-hql-with-clause.html

With Criteria have a look to
CreateAlias(string associationPath, string alias, JoinType joinType, ICriterion withClause)
CreateCriteria(string associationPath, string alias, JoinType joinType, ICriterion withClause)

With QueryOver it is not available but there’s a JIRA for this here: https://nhibernate.jira.com/browse/NH-2592