| Version 1 (modified by , 9 months ago) ( diff ) |
|---|
Преглед на сите дискусии за даден топик
Актери
- Ненајавен корисник
Чекори
- Навигира до соодветниот топик.
- Се прикажуваат сите дискусии во рамки на тој топик.
SQL
create or replace view v_discussion_thread
as
with recursive
depth_table as
(select parent_id, id, 0 as depth
from discussion_thread
UNION ALL
select discuss.parent_id, dpth.id, dpth.depth + 1
from depth_table dpth
join discussion_thread discuss
on dpth.parent_id = discuss.id),
tmp as (select id, max(depth) as depth
from depth_table
group by id)
select d.id as id, t.user_id as user_id, d.depth as depth, d1.parent_id as parent_id, t.created_at as "created_at"
from tmp d
join depth_table d1
on d.id = d1.id and d1.depth = d.depth
join thread t
on t.id = d.id;
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