Estás cerca:
select connect_by_root parent_id base, parent_id, child_id, qty
from md_boms
connect by prior child_id = parent_id
order by base, parent_id, child_id;
BASE PARENT_ID CHILD_ID QTY
---------- ---------- ---------- ----------
25 25 26 1
25 25 27 2
25 26 28 1
25 26 29 1
25 26 30 2
25 27 31 1
25 27 32 1
25 27 33 2
26 26 28 1
26 26 29 1
26 26 30 2
27 27 31 1
27 27 32 1
27 27 33 2
14 rows selected
El connect_by_root operador
te da la base parent_id .
No estoy seguro de cómo estás calculando tu qty . Supongo que quiere el total de la ruta al niño, pero eso no coincide con lo que ha mostrado. Entonces, como punto de partida, tomar prestado muy fuertemente de esta respuesta
, podría intentar algo como:
with hierarchy as (
select connect_by_root parent_id base, parent_id, child_id, qty,
sys_connect_by_path(child_id, '/') as path
from md_boms
connect by prior child_id = parent_id
)
select h.base, h.parent_id, h.child_id, sum(e.qty)
from hierarchy h
join hierarchy e on h.path like e.path ||'%'
group by h.base, h.parent_id, h.child_id
order by h.base, h.parent_id, h.child_id;
BASE PARENT_ID CHILD_ID SUM(E.QTY)
---------- ---------- ---------- ----------
25 25 26 1
25 25 27 2
25 26 28 2
25 26 29 2
25 26 30 3
25 27 31 3
25 27 32 3
25 27 33 4
26 26 28 1
26 26 29 1
26 26 30 2
27 27 31 1
27 27 32 1
27 27 33 2
14 rows selected
