Write subquery in Criteria of nHibernate

Question

I've read about subquery in Criteria, but I am still unable to grasp it properly. Here I am taking one example and if somebody can help me write that using subquery it will be great.

Lets say we have table

Employee{EmployeeId.(int),Name(string),Post(string),No_Of_years_working(int)}

Now I want all the employees who are Managers and working for less than 10 years. I know that we can get the result without using subqueries but I want to use subquery just to understand how it works in criteria.

So, how I can write Criteria using subquery to get those employees.

Answer 1

Well - the code should be something like this:

DetachedCriteria dc = DetachedCriteria.For<Employee>()
.Add (Subqueries.PropertyIn("EmployeeId",
     DetachedCriteria.For<Employee>()
         .SetProjection(Projections.Property("EmployeeId"))
         .Add(Restrictions.Lt("No_Of_years_working", 10))
         .Add(Restrictions.Eq("Post", "Manager"))
);

Hope this helps.