Oracle Forms Developer – Form Builder Reference, Volume 1

On-Column-Security trigger
Description
Fires when Form Builder would normally enforce column-level security for each block that has the
Enforce Column Security block property set On.
By default, Form Builder enforces column security by querying the database to determine the base table
columns to which the current form operator has update privileges. For columns to which the operator
does not have update privileges, Form Builder makes the corresponding base table items in the form nonupdateable
by setting the Update Allowed item property Off dynamically. Form Builder performs this
operation at form startup, processing each block in sequence.
Definition Level form, block
Legal Commands
SELECT statements, PL/SQL, unrestricted built-ins
Enter Query Mode no
Usage Notes
To perform the default processing from this trigger, call the ENFORCE_COLUMN_SECURITY builtin.
On Failure
no effect
On-Column-Security trigger examples
Example
The following example sets salary and commission text items in the current block to disabled and nonupdateable,
unless the SUPERUSER role is enabled. Only users with the user-defined SUPERUSER role
can change these number fields.
DECLARE
itm_id Item;
on_or_off NUMBER;
BEGIN
IF NOT role_is_set(’SUPERUSER’) THEN
on_or_off := PROPERTY_OFF;
ELSE
on_or_off := PROPERTY_ON;
END IF;
itm_id := Find_Item(’Emp.Sal’);
Set_Item_Property(itm_id,ENABLED,on_or_off);
Set_Item_Property(itm_id,UPDATEABLE,on_or_off);
itm_id := Find_Item(’Emp.Comm’);
Set_Item_Property(itm_id,ENABLED,on_or_off);
Set_Item_Property(itm_id,UPDATEABLE,on_or_off);
438
IF form_fatal OR form_failure THEN