lemmy/migrations/2020-08-03-000110_add_prefe.../down.sql

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-- Drops first
drop view site_view;
drop table user_fast;
drop view user_view;
drop view post_fast_view;
drop table post_aggregates_fast;
drop view post_view;
drop view post_aggregates_view;
drop view community_moderator_view;
drop view community_follower_view;
drop view community_user_ban_view;
drop view community_view;
drop view community_aggregates_view;
drop view community_fast_view;
drop table community_aggregates_fast;
drop view private_message_view;
drop view user_mention_view;
drop view reply_fast_view;
drop view comment_fast_view;
drop view comment_view;
drop view user_mention_fast_view;
drop table comment_aggregates_fast;
drop view comment_aggregates_view;
alter table site
drop column icon,
drop column banner;
alter table community
drop column icon,
drop column banner;
alter table user_ drop column banner;
-- Site
create view site_view as
select *,
(select name from user_ u where s.creator_id = u.id) as creator_name,
(select avatar from user_ u where s.creator_id = u.id) as creator_avatar,
(select count(*) from user_) as number_of_users,
(select count(*) from post) as number_of_posts,
(select count(*) from comment) as number_of_comments,
(select count(*) from community) as number_of_communities
from site s;
-- User
create view user_view as
select
u.id,
u.actor_id,
u.name,
u.avatar,
u.email,
u.matrix_user_id,
u.bio,
u.local,
u.admin,
u.banned,
u.show_avatars,
u.send_notifications_to_email,
u.published,
coalesce(pd.posts, 0) as number_of_posts,
coalesce(pd.score, 0) as post_score,
coalesce(cd.comments, 0) as number_of_comments,
coalesce(cd.score, 0) as comment_score
from user_ u
left join (
select
p.creator_id as creator_id,
count(distinct p.id) as posts,
sum(pl.score) as score
from post p
join post_like pl on p.id = pl.post_id
group by p.creator_id
) pd on u.id = pd.creator_id
left join (
select
c.creator_id,
count(distinct c.id) as comments,
sum(cl.score) as score
from comment c
join comment_like cl on c.id = cl.comment_id
group by c.creator_id
) cd on u.id = cd.creator_id;
create table user_fast as select * from user_view;
alter table user_fast add primary key (id);
-- Post fast
create view post_aggregates_view as
select
p.*,
-- creator details
u.actor_id as creator_actor_id,
u."local" as creator_local,
u."name" as creator_name,
u.published as creator_published,
u.avatar as creator_avatar,
u.banned as banned,
cb.id::bool as banned_from_community,
-- community details
c.actor_id as community_actor_id,
c."local" as community_local,
c."name" as community_name,
c.removed as community_removed,
c.deleted as community_deleted,
c.nsfw as community_nsfw,
-- post score data/comment count
coalesce(ct.comments, 0) as number_of_comments,
coalesce(pl.score, 0) as score,
coalesce(pl.upvotes, 0) as upvotes,
coalesce(pl.downvotes, 0) as downvotes,
hot_rank(
coalesce(pl.score , 0), (
case
when (p.published < ('now'::timestamp - '1 month'::interval))
then p.published
else greatest(ct.recent_comment_time, p.published)
end
)
) as hot_rank,
(
case
when (p.published < ('now'::timestamp - '1 month'::interval))
then p.published
else greatest(ct.recent_comment_time, p.published)
end
) as newest_activity_time
from post p
left join user_ u on p.creator_id = u.id
left join community_user_ban cb on p.creator_id = cb.user_id and p.community_id = cb.community_id
left join community c on p.community_id = c.id
left join (
select
post_id,
count(*) as comments,
max(published) as recent_comment_time
from comment
group by post_id
) ct on ct.post_id = p.id
left join (
select
post_id,
sum(score) as score,
sum(score) filter (where score = 1) as upvotes,
-sum(score) filter (where score = -1) as downvotes
from post_like
group by post_id
) pl on pl.post_id = p.id
order by p.id;
create view post_view as
select
pav.*,
us.id as user_id,
us.user_vote as my_vote,
us.is_subbed::bool as subscribed,
us.is_read::bool as read,
us.is_saved::bool as saved
from post_aggregates_view pav
cross join lateral (
select
u.id,
coalesce(cf.community_id, 0) as is_subbed,
coalesce(pr.post_id, 0) as is_read,
coalesce(ps.post_id, 0) as is_saved,
coalesce(pl.score, 0) as user_vote
from user_ u
left join community_user_ban cb on u.id = cb.user_id and cb.community_id = pav.community_id
left join community_follower cf on u.id = cf.user_id and cf.community_id = pav.community_id
left join post_read pr on u.id = pr.user_id and pr.post_id = pav.id
left join post_saved ps on u.id = ps.user_id and ps.post_id = pav.id
left join post_like pl on u.id = pl.user_id and pav.id = pl.post_id
) as us
union all
select
pav.*,
null as user_id,
null as my_vote,
null as subscribed,
null as read,
null as saved
from post_aggregates_view pav;
create table post_aggregates_fast as select * from post_aggregates_view;
alter table post_aggregates_fast add primary key (id);
create view post_fast_view as
select
pav.*,
us.id as user_id,
us.user_vote as my_vote,
us.is_subbed::bool as subscribed,
us.is_read::bool as read,
us.is_saved::bool as saved
from post_aggregates_fast pav
cross join lateral (
select
u.id,
coalesce(cf.community_id, 0) as is_subbed,
coalesce(pr.post_id, 0) as is_read,
coalesce(ps.post_id, 0) as is_saved,
coalesce(pl.score, 0) as user_vote
from user_ u
left join community_user_ban cb on u.id = cb.user_id and cb.community_id = pav.community_id
left join community_follower cf on u.id = cf.user_id and cf.community_id = pav.community_id
left join post_read pr on u.id = pr.user_id and pr.post_id = pav.id
left join post_saved ps on u.id = ps.user_id and ps.post_id = pav.id
left join post_like pl on u.id = pl.user_id and pav.id = pl.post_id
) as us
union all
select
pav.*,
null as user_id,
null as my_vote,
null as subscribed,
null as read,
null as saved
from post_aggregates_fast pav;
-- Community
create view community_aggregates_view as
select
c.id,
c.name,
c.title,
c.description,
c.category_id,
c.creator_id,
c.removed,
c.published,
c.updated,
c.deleted,
c.nsfw,
c.actor_id,
c.local,
c.last_refreshed_at,
u.actor_id as creator_actor_id,
u.local as creator_local,
u.name as creator_name,
u.avatar as creator_avatar,
cat.name as category_name,
coalesce(cf.subs, 0) as number_of_subscribers,
coalesce(cd.posts, 0) as number_of_posts,
coalesce(cd.comments, 0) as number_of_comments,
hot_rank(cf.subs, c.published) as hot_rank
from community c
left join user_ u on c.creator_id = u.id
left join category cat on c.category_id = cat.id
left join (
select
p.community_id,
count(distinct p.id) as posts,
count(distinct ct.id) as comments
from post p
join comment ct on p.id = ct.post_id
group by p.community_id
) cd on cd.community_id = c.id
left join (
select
community_id,
count(*) as subs
from community_follower
group by community_id
) cf on cf.community_id = c.id;
create view community_view as
select
cv.*,
us.user as user_id,
us.is_subbed::bool as subscribed
from community_aggregates_view cv
cross join lateral (
select
u.id as user,
coalesce(cf.community_id, 0) as is_subbed
from user_ u
left join community_follower cf on u.id = cf.user_id and cf.community_id = cv.id
) as us
union all
select
cv.*,
null as user_id,
null as subscribed
from community_aggregates_view cv;
create view community_moderator_view as
select
cm.*,
u.actor_id as user_actor_id,
u.local as user_local,
u.name as user_name,
u.avatar as avatar,
c.actor_id as community_actor_id,
c.local as community_local,
c.name as community_name
from community_moderator cm
left join user_ u on cm.user_id = u.id
left join community c on cm.community_id = c.id;
create view community_follower_view as
select
cf.*,
u.actor_id as user_actor_id,
u.local as user_local,
u.name as user_name,
u.avatar as avatar,
c.actor_id as community_actor_id,
c.local as community_local,
c.name as community_name
from community_follower cf
left join user_ u on cf.user_id = u.id
left join community c on cf.community_id = c.id;
create view community_user_ban_view as
select
cb.*,
u.actor_id as user_actor_id,
u.local as user_local,
u.name as user_name,
u.avatar as avatar,
c.actor_id as community_actor_id,
c.local as community_local,
c.name as community_name
from community_user_ban cb
left join user_ u on cb.user_id = u.id
left join community c on cb.community_id = c.id;
-- The community fast table
create table community_aggregates_fast as select * from community_aggregates_view;
alter table community_aggregates_fast add primary key (id);
create view community_fast_view as
select
ac.*,
u.id as user_id,
(select cf.id::boolean from community_follower cf where u.id = cf.user_id and ac.id = cf.community_id) as subscribed
from user_ u
cross join (
select
ca.*
from community_aggregates_fast ca
) ac
union all
select
caf.*,
null as user_id,
null as subscribed
from community_aggregates_fast caf;
-- Private message
create view private_message_view as
select
pm.*,
u.name as creator_name,
u.avatar as creator_avatar,
u.actor_id as creator_actor_id,
u.local as creator_local,
u2.name as recipient_name,
u2.avatar as recipient_avatar,
u2.actor_id as recipient_actor_id,
u2.local as recipient_local
from private_message pm
inner join user_ u on u.id = pm.creator_id
inner join user_ u2 on u2.id = pm.recipient_id;
-- Comments, mentions, replies
create view comment_aggregates_view as
select
ct.*,
-- post details
p."name" as post_name,
p.community_id,
-- community details
c.actor_id as community_actor_id,
c."local" as community_local,
c."name" as community_name,
-- creator details
u.banned as banned,
coalesce(cb.id, 0)::bool as banned_from_community,
u.actor_id as creator_actor_id,
u.local as creator_local,
u.name as creator_name,
u.published as creator_published,
u.avatar as creator_avatar,
-- score details
coalesce(cl.total, 0) as score,
coalesce(cl.up, 0) as upvotes,
coalesce(cl.down, 0) as downvotes,
hot_rank(coalesce(cl.total, 0), ct.published) as hot_rank
from comment ct
left join post p on ct.post_id = p.id
left join community c on p.community_id = c.id
left join user_ u on ct.creator_id = u.id
left join community_user_ban cb on ct.creator_id = cb.user_id and p.id = ct.post_id and p.community_id = cb.community_id
left join (
select
l.comment_id as id,
sum(l.score) as total,
count(case when l.score = 1 then 1 else null end) as up,
count(case when l.score = -1 then 1 else null end) as down
from comment_like l
group by comment_id
) as cl on cl.id = ct.id;
create or replace view comment_view as (
select
cav.*,
us.user_id as user_id,
us.my_vote as my_vote,
us.is_subbed::bool as subscribed,
us.is_saved::bool as saved
from comment_aggregates_view cav
cross join lateral (
select
u.id as user_id,
coalesce(cl.score, 0) as my_vote,
coalesce(cf.id, 0) as is_subbed,
coalesce(cs.id, 0) as is_saved
from user_ u
left join comment_like cl on u.id = cl.user_id and cav.id = cl.comment_id
left join comment_saved cs on u.id = cs.user_id and cs.comment_id = cav.id
left join community_follower cf on u.id = cf.user_id and cav.community_id = cf.community_id
) as us
union all
select
cav.*,
null as user_id,
null as my_vote,
null as subscribed,
null as saved
from comment_aggregates_view cav
);
create table comment_aggregates_fast as select * from comment_aggregates_view;
alter table comment_aggregates_fast add primary key (id);
create view comment_fast_view as
select
cav.*,
us.user_id as user_id,
us.my_vote as my_vote,
us.is_subbed::bool as subscribed,
us.is_saved::bool as saved
from comment_aggregates_fast cav
cross join lateral (
select
u.id as user_id,
coalesce(cl.score, 0) as my_vote,
coalesce(cf.id, 0) as is_subbed,
coalesce(cs.id, 0) as is_saved
from user_ u
left join comment_like cl on u.id = cl.user_id and cav.id = cl.comment_id
left join comment_saved cs on u.id = cs.user_id and cs.comment_id = cav.id
left join community_follower cf on u.id = cf.user_id and cav.community_id = cf.community_id
) as us
union all
select
cav.*,
null as user_id,
null as my_vote,
null as subscribed,
null as saved
from comment_aggregates_fast cav;
create view user_mention_view as
select
c.id,
um.id as user_mention_id,
c.creator_id,
c.creator_actor_id,
c.creator_local,
c.post_id,
c.post_name,
c.parent_id,
c.content,
c.removed,
um.read,
c.published,
c.updated,
c.deleted,
c.community_id,
c.community_actor_id,
c.community_local,
c.community_name,
c.banned,
c.banned_from_community,
c.creator_name,
c.creator_avatar,
c.score,
c.upvotes,
c.downvotes,
c.hot_rank,
c.user_id,
c.my_vote,
c.saved,
um.recipient_id,
(select actor_id from user_ u where u.id = um.recipient_id) as recipient_actor_id,
(select local from user_ u where u.id = um.recipient_id) as recipient_local
from user_mention um, comment_view c
where um.comment_id = c.id;
create view user_mention_fast_view as
select
ac.id,
um.id as user_mention_id,
ac.creator_id,
ac.creator_actor_id,
ac.creator_local,
ac.post_id,
ac.post_name,
ac.parent_id,
ac.content,
ac.removed,
um.read,
ac.published,
ac.updated,
ac.deleted,
ac.community_id,
ac.community_actor_id,
ac.community_local,
ac.community_name,
ac.banned,
ac.banned_from_community,
ac.creator_name,
ac.creator_avatar,
ac.score,
ac.upvotes,
ac.downvotes,
ac.hot_rank,
u.id as user_id,
coalesce(cl.score, 0) as my_vote,
(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved,
um.recipient_id,
(select actor_id from user_ u where u.id = um.recipient_id) as recipient_actor_id,
(select local from user_ u where u.id = um.recipient_id) as recipient_local
from user_ u
cross join (
select
ca.*
from comment_aggregates_fast ca
) ac
left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
left join user_mention um on um.comment_id = ac.id
union all
select
ac.id,
um.id as user_mention_id,
ac.creator_id,
ac.creator_actor_id,
ac.creator_local,
ac.post_id,
ac.post_name,
ac.parent_id,
ac.content,
ac.removed,
um.read,
ac.published,
ac.updated,
ac.deleted,
ac.community_id,
ac.community_actor_id,
ac.community_local,
ac.community_name,
ac.banned,
ac.banned_from_community,
ac.creator_name,
ac.creator_avatar,
ac.score,
ac.upvotes,
ac.downvotes,
ac.hot_rank,
null as user_id,
null as my_vote,
null as saved,
um.recipient_id,
(select actor_id from user_ u where u.id = um.recipient_id) as recipient_actor_id,
(select local from user_ u where u.id = um.recipient_id) as recipient_local
from comment_aggregates_fast ac
left join user_mention um on um.comment_id = ac.id
;
-- Do the reply_view referencing the comment_fast_view
create view reply_fast_view as
with closereply as (
select
c2.id,
c2.creator_id as sender_id,
c.creator_id as recipient_id
from comment c
inner join comment c2 on c.id = c2.parent_id
where c2.creator_id != c.creator_id
-- Do union where post is null
union
select
c.id,
c.creator_id as sender_id,
p.creator_id as recipient_id
from comment c, post p
where c.post_id = p.id and c.parent_id is null and c.creator_id != p.creator_id
)
select cv.*,
closereply.recipient_id
from comment_fast_view cv, closereply
where closereply.id = cv.id
;
-- redoing the triggers
create or replace function refresh_post()
returns trigger language plpgsql
as $$
begin
IF (TG_OP = 'DELETE') THEN
delete from post_aggregates_fast where id = OLD.id;
-- Update community number of posts
update community_aggregates_fast set number_of_posts = number_of_posts - 1 where id = OLD.community_id;
ELSIF (TG_OP = 'UPDATE') THEN
delete from post_aggregates_fast where id = OLD.id;
insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.id;
ELSIF (TG_OP = 'INSERT') THEN
insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.id;
-- Update that users number of posts, post score
delete from user_fast where id = NEW.creator_id;
insert into user_fast select * from user_view where id = NEW.creator_id;
-- Update community number of posts
update community_aggregates_fast set number_of_posts = number_of_posts + 1 where id = NEW.community_id;
-- Update the hot rank on the post table
-- TODO this might not correctly update it, using a 1 week interval
update post_aggregates_fast as paf
set hot_rank = pav.hot_rank
from post_aggregates_view as pav
where paf.id = pav.id and (pav.published > ('now'::timestamp - '1 week'::interval));
END IF;
return null;
end $$;
create or replace function refresh_comment()
returns trigger language plpgsql
as $$
begin
IF (TG_OP = 'DELETE') THEN
delete from comment_aggregates_fast where id = OLD.id;
-- Update community number of comments
update community_aggregates_fast as caf
set number_of_comments = number_of_comments - 1
from post as p
where caf.id = p.community_id and p.id = OLD.post_id;
ELSIF (TG_OP = 'UPDATE') THEN
delete from comment_aggregates_fast where id = OLD.id;
insert into comment_aggregates_fast select * from comment_aggregates_view where id = NEW.id;
ELSIF (TG_OP = 'INSERT') THEN
insert into comment_aggregates_fast select * from comment_aggregates_view where id = NEW.id;
-- Update user view due to comment count
update user_fast
set number_of_comments = number_of_comments + 1
where id = NEW.creator_id;
-- Update post view due to comment count, new comment activity time, but only on new posts
-- TODO this could be done more efficiently
delete from post_aggregates_fast where id = NEW.post_id;
insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.post_id;
-- Force the hot rank as zero on week-older posts
update post_aggregates_fast as paf
set hot_rank = 0
where paf.id = NEW.post_id and (paf.published < ('now'::timestamp - '1 week'::interval));
-- Update community number of comments
update community_aggregates_fast as caf
set number_of_comments = number_of_comments + 1
from post as p
where caf.id = p.community_id and p.id = NEW.post_id;
END IF;
return null;
end $$;