Updateable View ORA-2014

Question

Okay you helped me with the insert on a view with this note although you never completely answered all my questions:
http://technet.oracle.com:89/ubb/Forum2/HTML/005469.html
Now I need help with an update on a view. I have an instead of update trigger on the database that works fine in SQL but when I try to change something in JDeveloper I get the following errors:
JBO-26080: Error while selecting entity for MyTable
ORA-02014: cannot select FOR UPDATE from view with DISTINCT, GROUP BY, etc.
Any help would be appreciated.
Thanks,
Linda

Answer 1

JDBC won't be able to help you with this.
The issue is exactly what the error message says, so the thing you have to do is avoid the BC4J framework's attempt to lock a row for an entity based on this view.
The easy way to do this, is to override the lock() method on your entity class, with a method that does nothing:
void lock() { /* do nothing */ }
I'm assuming you've got INSTEAD OF triggers on this view to control what should happen when it's attempted to be updated as well.
Note that without being able to lock the row, you could experience "lost update" problems if two users simultaneously issue updates to the same row, but this is not something BC4J can prevent for you unless it can lock the row, as it tries to do by its default behavior.