问题:

I have HQL statement:

insert into Item (ost, value, comments, startTime, endTime, proposedBy) 
select si.ost, si.value, si.comments, si.endTime, si.endTime, u 
from Item si, User u 
where si.ost = ? and u.id = ?

How could it be modified to use parameters' values for ost and startTime columns while taking other columns from select?

回答1:

Can’t be done in HQL; it doesn’t allow parameter references in the select clause.

回答2:

I don't know about that last answer. I am using NH 3.2 and I was able to get this to work

var hql = @"INSERT INTO EventFacility (Facility, Event, Owner, Position) 
SELECT f, :evt, :own, :position from Facility f where f.Id IN (105, 109, 110)";

var @event = Session.Get<Event>(351931);
var query = Session.CreateQuery(hql)
                .SetInt32("position", 0)
                .SetEntity("evt", @event)
                .SetEntity("own", @event.Owner);

var x = query.ExecuteUpdate();
Assert.AreEqual(3, x);

In this example I needed to create a new EventFacility object. With pretty much all the fields you see here. The Event entity has another entity, Owner hanging off of it.