APEX

Hi folks,

this should be simple, so someone who works with dynamic actions.

I have a LOV which is based on below query:

select OBJECT_ID, KOD 
  from x_data x;

retuns:
   ID          KOD
----------------------------
    492961 BMW
    492964 VOLVO
    492960 MERCEDES
    492963 VOLKSWAGEN
    492959 SKODA

Item :P200_KOD is based on LOV which displays KOD and returns ID.

On my page I have also 1 region called TEST_REGION.

I would like to set up a dynamic action shich will SHOW/HIDE a TEST_REGION based on selected value in item :P200_KOD (LOV). Region should be showed if displayed (KOD) value of selected ID starts with 'V%'
By other words, if below query returns any record, then SHOW, else HIDE:

   select *
    from x_data x
  where x.kod like 'V%'
     and x.object_id = :P200_KOD;

How should I define a triggering condition for dynamic action, for item :P200_KOD?

Thanks,
Tomas