Override join 'ON' primary column in Criteria

Question

I am using Criteria and I want to explicitly tell hibernate to join on specific columns rather than the primary and foreign key columns. My code is

CreateCriteria<Application>("Application")
.CreateCriteria("Application.Address", "Address", JoinType.FullJoin)

The query that runs for this is

Select * from Application app Full Join Address add ON app.AdressId = add.Id

I want the query to be as

Select * from Application app Full Join Address add ON app.PersonId = add.PersonId

I changed my criteria to

CreateCriteria<Application>("Application")
.CreateCriteria("Application.Address", "Address", JoinType.FullJoin, Restrictions.eqProperty("Application.Person.Id", "Address.Person.Id"))

The sql query that runs is

Select * from Application app Full Join Address add ON app.PersonId = add.PersonId and app.AdressId = add.Id

Is there a way I can explicitly mention in the criteria on the joins I wish to have ?

Answer 1

NHibernate always does joins basing on foreign keys. I guess that you have configured relationship between Application and Address entities via Application.AddressId foreign key. That's why you have app.AdressId = add.Id in join.

If I'm right you cannot do the join on some other property. You can find a slower workaround with subqueries or write a sql query manually.

See other answers:

1. https://stackoverflow.com/a/28689750/5126411
2. https://stackoverflow.com/a/44924773/5126411