lemmy/server/migrations/2019-04-03-155309_create_co.../up.sql

31 lines
675 B
SQL

create view comment_view as
with all_comment as
(
select
c.*,
(select name from user_ where c.creator_id = user_.id) creator_name,
coalesce(sum(cl.score), 0) as score,
count (case when cl.score = 1 then 1 else null end) as upvotes,
count (case when cl.score = -1 then 1 else null end) as downvotes
from comment c
left join comment_like cl on c.id = cl.comment_id
group by c.id
)
select
ac.*,
u.id as user_id,
coalesce(cl.score, 0) as my_vote
from user_ u
cross join all_comment ac
left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
union all
select
ac.*,
null as user_id,
null as my_vote
from all_comment ac
;