Unable to pass a parameter to a field in a tabular form.

Question

I created a tabular form with 2.0 using the wizard. I’m having issues though with 2 of my columns.
The two columns are last_edit_user and last_edit_date. As you can tell I’m trying to pass the system date and :app_user to these two fields.
I read this thread Default Value in Tabular Form and decided to create a simple function on the database that returns the system date. Then under report attributes I went to the last_edit_date column. In “Tabular Form Element” I changed it to “Display as Text (saves state)” made the default type a PL/SQL expression or function then put the function name in the ‘default’ text field.
When I try to update a field I then get:
Error in mru internal routine: ORA-20001: Error in MRU: row= 1, ORA-01407: cannot update
I have also tried creating a computation and passing the date to a hidden item then use default type item and list the hidden item in the default text box. I get the same error.
Considering how often these fields or similar would come up in a tabular form I can’t help but think there must be an easy way of passing parameters to fields in a tabular form without making them editable.
Message was edited by:
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Answer 1

This keeps coming up often and I find that the easiest way to handle this is in a row-level trigger on the underlying table
create or replace trigger t
before insert or update on mytable
for each row
begin
:new.last_update_date := sysdate;
:new.last_update_user := nvl(v('APP_USER'),user);
end;
/