Trigger to run the query when the value of LOV is selected

HI guys,.

I have a form in which I have 2 fields in Master and 4 fields in detail, showing all on the same canvas.
I put a "execute_query" in when_new_form_instance trigger so that when I open the form it is pre - filled.
The fields get the values LOVs. I want to run the master block query when the user selects a value in LOV, then in what trigger should I put it.
I tried in 'when_validate_item' and 'when_list_changed' triggers, but it showed an error.
So, what should I do?

Concerning

Ranjan

user8664136 wrote:
I want to run the master block query when the user selects a value of LOV

If master block (header) is based on the table, using LOV without pressing enter_query firstly, update existing record.
Here's my version (Andreas, sorry, I used your code :))

TO KEY-LISTVAL:

DECLARE
     tm TIMER:=FIND_TIMER('TM_QUERY');
BEGIN
  IF ID_NULL(tm) THEN
    tm:=CREATE_TIMER('TM_QUERY', 1, NO_REPEAT);
  END IF;
  ENTER_QUERY;
END;

In WHEN-TIMER-EXPIRED:

IF SHOW_LOV('LOV') THEN
 EXECUTE_QUERY;
END IF;

Tags: Oracle Development

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