It looks like I can use the `getvertices()` function and the `table()` function
:

    select
        a.line_id,
        --sdo_util.getvertices(a.shape),
        b.id as vertex_id,
        b.x, b.y
    from
        a_sdo_geometry_tbl a
    cross join
        table(sdo_util.getvertices(a.shape)) b
    order by 
        a.line_id, b.id;


       LINE_ID  VERTEX_ID          X          Y
    ---------- ---------- ---------- ----------
             1          1 671539.685 4863324.18
             1          2 671595.050 4863343.17
             1          3 671614.014 4863350.34
             1          4 671622.204 4863353.53

             2          1 71534.5567 4863119.99
             2          2 671640.738 4863157.13
             2          3 671684.862 4863172.02

             3          1 671622.204 4863353.53
             3          2 671633.327 4863357.85
             3          3 671904.061 4863451.29

             4          1 671684.862 4863172.02
             4          2 671892.150 4863244.14
             4          3 671951.216 4863264.82
             4          4 671957.447 4863266.85
             4          5 671966.824 4863269.15
    
    15 rows selected.