tags:

views:

192

answers:

2
+1  Q: 

Previewing the sql code generated by NHibernate

Using NHibernate 2.0:

I have an object with some changes on it and I am about to session.Update() it. Is there some way I can preview the SQL that will be executed without actually executing it?

A: 

Hi!

Why would you want to do that? You can show it by the show-sql setting, but it will be executed also. You could use NHibernate againt an in-memory database like SQLite if you want to test the mapping ;)

Best Regards
Oliver Hanappi

Oliver Hanappi  2009-09-17 10:49:06
I know, but I'm stuck with this live legacy database, I'm paranoid, and I'm curious. :-)
Per Erik Stendahl  2009-09-17 10:50:59
@Per Erik, you are walking on thin ice my friend. I would seriously suggest working off a backup/snapshot, then would be free to test and break things.
mxmissile  2009-09-17 14:39:56
+2  A: 

You could wrap a transaction around the session and perform the update without committing.

lomaxx  2009-09-17 10:53:38
Good idea, not best performance, but for tests good enough, if NHibernate does not lock too many rows.
Oliver Hanappi  2009-09-17 11:47:37
Yes, I was thinking about that. I guess this is the only sure way of seeing the generated SQL in all it's glory! :-) Thanks.
Per Erik Stendahl  2009-09-21 07:17:27
Note to self: .Flush() before tx.Rollback()
Per Erik Stendahl  2009-09-21 13:07:17

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