var results = dc.GetExecutableCriteria(ses)
                .CreateAlias("TreeNodes", "tn")
                .Add(Restrictions.Eq("tn.Id", 1))
                .CreateAlias("Actions", "actions")
                .Add(Restrictions.Eq("actions.Operator.Id", 1))
                .Future<Document>() as List<Document>;

SELECT     
               this_.title AS title10_2_,
               this_.doc_date AS doc6_10_2_,
               /* ... */
               actions6_.fk_document AS fk1_, // <---
               actions2_.id AS fk2_, // <---
               /* ... */
               treenodes4_.fk_document AS fk1_, // <---
               tn1_.id AS fk2_ // <---
               FROM documents this_
              INNER JOIN link_documents_treenodes treenodes4_
                ON this_.id = treenodes4_.fk_document
              INNER JOIN document_treenodes tn1_
                ON treenodes4_.fk_treenode = tn1_.id
              INNER JOIN link_documents_actions actions6_
                ON this_.id = actions6_.fk_document
              INNER JOIN actions actions2_
                ON actions6_.fk_action = actions2_.id
               /* ... */

SELECT * FROM (/*запрос выше*/) WHERE rownum <  10 

select dummy as a, dummy as a from dual 

select * from (select dummy as a, dummy as a from dual)