DECLARE 
    CURSOR c1 IS 
      SELECT To_char (start_date + LEVEL - 1, 'fmDD') AS DAYS 
      FROM  (SELECT start_date, 
                    employee_number, 
                    end_date 
             FROM   v_leave_details 
             WHERE  employee_number = :XXFUJOTHRS.employee_number--'5527' 
            ) 
      WHERE  start_date + LEVEL - 1 >= To_date ('01' ||:XXFUJOTHRS.ot_month ||:XXFUJOTHRS.ot_year, 'dd-mm-yyyy') 
             AND start_date + LEVEL - 1 < 
                 Last_day(To_date  ('01'||:XXFUJOTHRS.ot_month||:XXFUJOTHRS.ot_year, 'dd-mm-yyyy') ) + 1 
      CONNECT BY LEVEL <= 1 + end_date - start_date 
                 AND PRIOR employee_number = employee_number 
                           -- or whatever is unique 
                           AND PRIOR start_date = start_date 
                                     AND PRIOR Sys_guid () IS NOT NULL; 
BEGIN 
    FOR j IN c1 LOOP 
        --DBMS_OUTPUT.PUT_LINE(J.DAYS); 
        Set_item_property('OT_DAY' ||j.days, enabled, property_false); 
    END LOOP; 
END; 

--TO MAKE THE FIELD ENABLE AGAIN IF THEY R DISABLED BY THE LEAVES 
DECLARE 
    CURSOR c1 IS 
      SELECT 1 + LEVEL - 1 DAYS 
      FROM   dual 
      CONNECT BY LEVEL <= To_char(Last_day( 
                          To_date('01' 
                                  ||:XXFUJOTHRS.ot_month 
                                  ||:XXFUJOTHRS.ot_year, 'dd-mm-rrrr')), 'dd'); 
BEGIN 
    FOR i IN c1 LOOP 
        --dbms_output.put_line(i.days); 
        Set_item_property('OT_DAY' 
                          ||i.days, enabled, property_true); 
    END LOOP; 
END; 

Set_Custom_Property('YOUR_BLOCK.ITEM_NAME',:SYSTEM.TRIGGER_RECORD, 'ENABLED', FALSE);

Set_Custom_Property('YOUR_BLOCK.ITEM_NAME',:SYSTEM.TRIGGER_RECORD, 'ENABLED', FALSE);