Error updating a datablock that uses a view

Question

I have a view that is using a UNION ALL between two tables. I have written the instead of trigger properly and I have no problem updating, inserting or deleting thru the view in Oracle.
The problem is that forms will query the view fine, but will not allow me to update any field associated with the datablock. I'm getting the following error message:
"FRM-40501: ORACLE error: unable to reserve record for update or delete"
and when I do display error, I get the following message:
"ORA-02014: cannot select FOR UPDATE from view with DISTINCT, GROUP BY, etc."
Any help would be appreciated, thanks in advance!

Answer 1

Well I only did the instead of trigger thing once.. But Ill stick my neck out anyway...
Since you have instead of triggers you may be able to get away with just putting a "null;" in the on-lock trigger or write your own locking code in the on-lock trigger. Search for locking in this forum for examples.
I think using the instead of triggers may override the need to specifically put insert, update, and delete statements in on-update, on-delete, on-insert form triggers.
Basically with instead of triggers the form will try to do its normal processing and issue select, insert, update, and delete statements on the view, which usually causes headaches, but the instead of triggers on the view will take over do the DML upon other appropriate tables making everybody happy. I think the locking is your issue.
Now if you werent using instead of triggers you would have to put update, insert, delete statements in the on-insert, on-update, on-delete triggers.
I think.. :)