mirror of
https://github.com/LemmyNet/lemmy
synced 2024-11-17 09:25:50 +00:00
f4565d0603
* One pass at materialized views, only about 30% faster, not good. * Before merging master to test out bans. * DB Rework working, still need more testing. * Fixing accidental addadmin bug from asonix async merge. * Fixing the comment delete trigger * Some more DB additions. - Adding a hot_rank desc, published desc index to post_aggregates_fast. - Removed WITH CTE queries in favor of direct selects (since CTEs cant use indexes) * Removing some unecessary indexes. * Some more DB optimizings - Changing the fast_id pkeys to just ids on the fast tables. - Removing the private_message_fast, since the view contains no aggregates. - Comment and post voting now no longer pull from the views, they update the counts directly. * Adding community_agg_view and post_agg_views Credit: eiknat. * Adding user and comment_view migrations. (comment_view still broken) * Adding more views. Credit Eiknat.
940 lines
27 KiB
PL/PgSQL
Vendored
940 lines
27 KiB
PL/PgSQL
Vendored
-- Drop the mviews
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drop view post_mview;
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drop materialized view user_mview;
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drop view community_mview;
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drop materialized view private_message_mview;
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drop view user_mention_mview;
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drop view reply_view;
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drop view comment_mview;
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drop materialized view post_aggregates_mview;
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drop materialized view community_aggregates_mview;
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drop materialized view comment_aggregates_mview;
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drop trigger refresh_private_message on private_message;
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-- User
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drop view user_view;
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create view user_view as
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select
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u.id,
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u.actor_id,
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u.name,
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u.avatar,
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u.email,
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u.matrix_user_id,
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u.bio,
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u.local,
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u.admin,
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u.banned,
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u.show_avatars,
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u.send_notifications_to_email,
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u.published,
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coalesce(pd.posts, 0) as number_of_posts,
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coalesce(pd.score, 0) as post_score,
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coalesce(cd.comments, 0) as number_of_comments,
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coalesce(cd.score, 0) as comment_score
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from user_ u
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left join (
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select
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p.creator_id as creator_id,
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count(distinct p.id) as posts,
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sum(pl.score) as score
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from post p
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join post_like pl on p.id = pl.post_id
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group by p.creator_id
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) pd on u.id = pd.creator_id
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left join (
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select
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c.creator_id,
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count(distinct c.id) as comments,
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sum(cl.score) as score
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from comment c
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join comment_like cl on c.id = cl.comment_id
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group by c.creator_id
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) cd on u.id = cd.creator_id;
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create table user_fast as select * from user_view;
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alter table user_fast add primary key (id);
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drop trigger refresh_user on user_;
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create trigger refresh_user
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after insert or update or delete
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on user_
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for each row
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execute procedure refresh_user();
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-- Sample insert
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-- insert into user_(name, password_encrypted) values ('test_name', 'bleh');
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-- Sample delete
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-- delete from user_ where name like 'test_name';
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-- Sample update
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-- update user_ set avatar = 'hai' where name like 'test_name';
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create or replace function refresh_user()
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returns trigger language plpgsql
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as $$
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begin
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IF (TG_OP = 'DELETE') THEN
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delete from user_fast where id = OLD.id;
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ELSIF (TG_OP = 'UPDATE') THEN
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delete from user_fast where id = OLD.id;
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insert into user_fast select * from user_view where id = NEW.id;
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-- Refresh post_fast, cause of user info changes
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delete from post_aggregates_fast where creator_id = NEW.id;
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insert into post_aggregates_fast select * from post_aggregates_view where creator_id = NEW.id;
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delete from comment_aggregates_fast where creator_id = NEW.id;
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insert into comment_aggregates_fast select * from comment_aggregates_view where creator_id = NEW.id;
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ELSIF (TG_OP = 'INSERT') THEN
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insert into user_fast select * from user_view where id = NEW.id;
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END IF;
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return null;
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end $$;
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-- Post
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-- Redoing the views : Credit eiknat
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drop view post_view;
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drop view post_aggregates_view;
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create view post_aggregates_view as
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select
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p.*,
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-- creator details
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u.actor_id as creator_actor_id,
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u."local" as creator_local,
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u."name" as creator_name,
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u.avatar as creator_avatar,
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u.banned as banned,
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cb.id::bool as banned_from_community,
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-- community details
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c.actor_id as community_actor_id,
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c."local" as community_local,
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c."name" as community_name,
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c.removed as community_removed,
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c.deleted as community_deleted,
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c.nsfw as community_nsfw,
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-- post score data/comment count
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coalesce(ct.comments, 0) as number_of_comments,
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coalesce(pl.score, 0) as score,
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coalesce(pl.upvotes, 0) as upvotes,
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coalesce(pl.downvotes, 0) as downvotes,
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hot_rank(
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coalesce(pl.score , 0), (
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case
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when (p.published < ('now'::timestamp - '1 month'::interval))
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then p.published
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else greatest(ct.recent_comment_time, p.published)
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end
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)
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) as hot_rank,
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(
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case
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when (p.published < ('now'::timestamp - '1 month'::interval))
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then p.published
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else greatest(ct.recent_comment_time, p.published)
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end
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) as newest_activity_time
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from post p
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left join user_ u on p.creator_id = u.id
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left join community_user_ban cb on p.creator_id = cb.user_id and p.community_id = cb.community_id
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left join community c on p.community_id = c.id
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left join (
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select
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post_id,
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count(*) as comments,
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max(published) as recent_comment_time
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from comment
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group by post_id
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) ct on ct.post_id = p.id
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left join (
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select
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post_id,
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sum(score) as score,
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sum(score) filter (where score = 1) as upvotes,
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-sum(score) filter (where score = -1) as downvotes
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from post_like
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group by post_id
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) pl on pl.post_id = p.id
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order by p.id;
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create view post_view as
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select
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pav.*,
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us.id as user_id,
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us.user_vote as my_vote,
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us.is_subbed::bool as subscribed,
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us.is_read::bool as read,
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us.is_saved::bool as saved
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from post_aggregates_view pav
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cross join lateral (
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select
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u.id,
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coalesce(cf.community_id, 0) as is_subbed,
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coalesce(pr.post_id, 0) as is_read,
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coalesce(ps.post_id, 0) as is_saved,
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coalesce(pl.score, 0) as user_vote
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from user_ u
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left join community_user_ban cb on u.id = cb.user_id and cb.community_id = pav.community_id
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left join community_follower cf on u.id = cf.user_id and cf.community_id = pav.community_id
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left join post_read pr on u.id = pr.user_id and pr.post_id = pav.id
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left join post_saved ps on u.id = ps.user_id and ps.post_id = pav.id
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left join post_like pl on u.id = pl.user_id and pav.id = pl.post_id
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) as us
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union all
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select
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pav.*,
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null as user_id,
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null as my_vote,
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null as subscribed,
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null as read,
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null as saved
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from post_aggregates_view pav;
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-- The post fast table
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create table post_aggregates_fast as select * from post_aggregates_view;
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alter table post_aggregates_fast add primary key (id);
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-- For the hot rank resorting
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create index idx_post_aggregates_fast_hot_rank_published on post_aggregates_fast (hot_rank desc, published desc);
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create view post_fast_view as
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select
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pav.*,
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us.id as user_id,
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us.user_vote as my_vote,
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us.is_subbed::bool as subscribed,
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us.is_read::bool as read,
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us.is_saved::bool as saved
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from post_aggregates_fast pav
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cross join lateral (
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select
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u.id,
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coalesce(cf.community_id, 0) as is_subbed,
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coalesce(pr.post_id, 0) as is_read,
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coalesce(ps.post_id, 0) as is_saved,
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coalesce(pl.score, 0) as user_vote
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from user_ u
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left join community_user_ban cb on u.id = cb.user_id and cb.community_id = pav.community_id
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left join community_follower cf on u.id = cf.user_id and cf.community_id = pav.community_id
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left join post_read pr on u.id = pr.user_id and pr.post_id = pav.id
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left join post_saved ps on u.id = ps.user_id and ps.post_id = pav.id
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left join post_like pl on u.id = pl.user_id and pav.id = pl.post_id
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) as us
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union all
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select
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pav.*,
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null as user_id,
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null as my_vote,
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null as subscribed,
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null as read,
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null as saved
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from post_aggregates_fast pav;
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drop trigger refresh_post on post;
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create trigger refresh_post
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after insert or update or delete
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on post
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for each row
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execute procedure refresh_post();
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-- Sample select
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-- select id, name from post_fast_view where name like 'test_post' and user_id is null;
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-- Sample insert
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-- insert into post(name, creator_id, community_id) values ('test_post', 2, 2);
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-- Sample delete
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-- delete from post where name like 'test_post';
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-- Sample update
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-- update post set community_id = 4 where name like 'test_post';
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create or replace function refresh_post()
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returns trigger language plpgsql
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as $$
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begin
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IF (TG_OP = 'DELETE') THEN
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delete from post_aggregates_fast where id = OLD.id;
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-- Update community number of posts
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update community_aggregates_fast set number_of_posts = number_of_posts - 1 where id = OLD.community_id;
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ELSIF (TG_OP = 'UPDATE') THEN
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delete from post_aggregates_fast where id = OLD.id;
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insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.id;
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ELSIF (TG_OP = 'INSERT') THEN
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insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.id;
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-- Update that users number of posts, post score
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delete from user_fast where id = NEW.creator_id;
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insert into user_fast select * from user_view where id = NEW.creator_id;
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-- Update community number of posts
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update community_aggregates_fast set number_of_posts = number_of_posts + 1 where id = NEW.community_id;
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-- Update the hot rank on the post table
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-- TODO this might not correctly update it, using a 1 week interval
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update post_aggregates_fast as paf
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set hot_rank = pav.hot_rank
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from post_aggregates_view as pav
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where paf.id = pav.id and (pav.published > ('now'::timestamp - '1 week'::interval));
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END IF;
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return null;
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end $$;
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-- Community
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-- Redoing the views : Credit eiknat
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drop view community_moderator_view;
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drop view community_follower_view;
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drop view community_user_ban_view;
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drop view community_view;
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drop view community_aggregates_view;
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create view community_aggregates_view as
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select
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c.id,
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c.name,
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c.title,
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c.description,
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c.category_id,
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c.creator_id,
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c.removed,
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c.published,
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c.updated,
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c.deleted,
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c.nsfw,
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c.actor_id,
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c.local,
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c.last_refreshed_at,
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u.actor_id as creator_actor_id,
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u.local as creator_local,
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u.name as creator_name,
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u.avatar as creator_avatar,
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cat.name as category_name,
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coalesce(cf.subs, 0) as number_of_subscribers,
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coalesce(cd.posts, 0) as number_of_posts,
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coalesce(cd.comments, 0) as number_of_comments,
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hot_rank(cf.subs, c.published) as hot_rank
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from community c
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left join user_ u on c.creator_id = u.id
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left join category cat on c.category_id = cat.id
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left join (
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select
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p.community_id,
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count(distinct p.id) as posts,
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count(distinct ct.id) as comments
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from post p
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join comment ct on p.id = ct.post_id
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group by p.community_id
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) cd on cd.community_id = c.id
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left join (
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select
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community_id,
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count(*) as subs
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from community_follower
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group by community_id
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) cf on cf.community_id = c.id;
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create view community_view as
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select
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cv.*,
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us.user as user_id,
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us.is_subbed::bool as subscribed
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from community_aggregates_view cv
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cross join lateral (
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select
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u.id as user,
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coalesce(cf.community_id, 0) as is_subbed
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from user_ u
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left join community_follower cf on u.id = cf.user_id and cf.community_id = cv.id
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) as us
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union all
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select
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cv.*,
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null as user_id,
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null as subscribed
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from community_aggregates_view cv;
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create view community_moderator_view as
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select
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cm.*,
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u.actor_id as user_actor_id,
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u.local as user_local,
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u.name as user_name,
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u.avatar as avatar,
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c.actor_id as community_actor_id,
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c.local as community_local,
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c.name as community_name
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from community_moderator cm
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left join user_ u on cm.user_id = u.id
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left join community c on cm.community_id = c.id;
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create view community_follower_view as
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select
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cf.*,
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u.actor_id as user_actor_id,
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u.local as user_local,
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u.name as user_name,
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u.avatar as avatar,
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c.actor_id as community_actor_id,
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c.local as community_local,
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c.name as community_name
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from community_follower cf
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left join user_ u on cf.user_id = u.id
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left join community c on cf.community_id = c.id;
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create view community_user_ban_view as
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select
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cb.*,
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u.actor_id as user_actor_id,
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u.local as user_local,
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u.name as user_name,
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u.avatar as avatar,
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c.actor_id as community_actor_id,
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c.local as community_local,
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c.name as community_name
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from community_user_ban cb
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left join user_ u on cb.user_id = u.id
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left join community c on cb.community_id = c.id;
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-- The community fast table
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create table community_aggregates_fast as select * from community_aggregates_view;
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alter table community_aggregates_fast add primary key (id);
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create view community_fast_view as
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select
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ac.*,
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u.id as user_id,
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(select cf.id::boolean from community_follower cf where u.id = cf.user_id and ac.id = cf.community_id) as subscribed
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from user_ u
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cross join (
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select
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ca.*
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from community_aggregates_fast ca
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) ac
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union all
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select
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caf.*,
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null as user_id,
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null as subscribed
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from community_aggregates_fast caf;
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drop trigger refresh_community on community;
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create trigger refresh_community
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after insert or update or delete
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on community
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for each row
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execute procedure refresh_community();
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-- Sample select
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-- select * from community_fast_view where name like 'test_community_name' and user_id is null;
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-- Sample insert
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-- insert into community(name, title, category_id, creator_id) values ('test_community_name', 'test_community_title', 1, 2);
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-- Sample delete
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-- delete from community where name like 'test_community_name';
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-- Sample update
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-- update community set title = 'test_community_title_2' where name like 'test_community_name';
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create or replace function refresh_community()
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returns trigger language plpgsql
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as $$
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begin
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IF (TG_OP = 'DELETE') THEN
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delete from community_aggregates_fast where id = OLD.id;
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ELSIF (TG_OP = 'UPDATE') THEN
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delete from community_aggregates_fast where id = OLD.id;
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insert into community_aggregates_fast select * from community_aggregates_view where id = NEW.id;
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-- Update user view due to owner changes
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delete from user_fast where id = NEW.creator_id;
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insert into user_fast select * from user_view where id = NEW.creator_id;
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-- Update post view due to community changes
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delete from post_aggregates_fast where community_id = NEW.id;
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insert into post_aggregates_fast select * from post_aggregates_view where community_id = NEW.id;
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-- TODO make sure this shows up in the users page ?
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ELSIF (TG_OP = 'INSERT') THEN
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insert into community_aggregates_fast select * from community_aggregates_view where id = NEW.id;
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END IF;
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return null;
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end $$;
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-- Comment
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drop view user_mention_view;
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drop view comment_view;
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drop view comment_aggregates_view;
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create view comment_aggregates_view as
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select
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ct.*,
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-- community details
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p.community_id,
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c.actor_id as community_actor_id,
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c."local" as community_local,
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c."name" as community_name,
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-- creator details
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u.banned as banned,
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coalesce(cb.id, 0)::bool as banned_from_community,
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u.actor_id as creator_actor_id,
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u.local as creator_local,
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u.name as creator_name,
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u.avatar as creator_avatar,
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-- score details
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coalesce(cl.total, 0) as score,
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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
|
|
);
|
|
|
|
-- The fast view
|
|
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;
|
|
|
|
-- 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
|
|
;
|
|
|
|
-- user mention
|
|
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.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.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.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
|
|
;
|
|
|
|
|
|
drop trigger refresh_comment on comment;
|
|
|
|
create trigger refresh_comment
|
|
after insert or update or delete
|
|
on comment
|
|
for each row
|
|
execute procedure refresh_comment();
|
|
|
|
-- Sample select
|
|
-- select * from comment_fast_view where content = 'test_comment' and user_id is null;
|
|
-- Sample insert
|
|
-- insert into comment(creator_id, post_id, content) values (2, 2, 'test_comment');
|
|
-- Sample delete
|
|
-- delete from comment where content like 'test_comment';
|
|
-- Sample update
|
|
-- update comment set removed = true where content like 'test_comment';
|
|
create or replace function refresh_comment()
|
|
returns trigger language plpgsql
|
|
as $$
|
|
begin
|
|
IF (TG_OP = 'DELETE') THEN
|
|
delete from comment_aggregates_fast where id = OLD.id;
|
|
|
|
-- Update community number of comments
|
|
update community_aggregates_fast as caf
|
|
set number_of_comments = number_of_comments - 1
|
|
from post as p
|
|
where caf.id = p.community_id and p.id = OLD.post_id;
|
|
|
|
ELSIF (TG_OP = 'UPDATE') THEN
|
|
delete from comment_aggregates_fast where id = OLD.id;
|
|
insert into comment_aggregates_fast select * from comment_aggregates_view where id = NEW.id;
|
|
ELSIF (TG_OP = 'INSERT') THEN
|
|
insert into comment_aggregates_fast select * from comment_aggregates_view where id = NEW.id;
|
|
|
|
-- Update user view due to comment count
|
|
update user_fast
|
|
set number_of_comments = number_of_comments + 1
|
|
where id = NEW.creator_id;
|
|
|
|
-- Update post view due to comment count, new comment activity time, but only on new posts
|
|
-- TODO this could be done more efficiently
|
|
delete from post_aggregates_fast where id = NEW.post_id;
|
|
insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.post_id;
|
|
|
|
-- Force the hot rank as zero on week-older posts
|
|
update post_aggregates_fast as paf
|
|
set hot_rank = 0
|
|
where paf.id = NEW.post_id and (paf.published < ('now'::timestamp - '1 week'::interval));
|
|
|
|
-- Update community number of comments
|
|
update community_aggregates_fast as caf
|
|
set number_of_comments = number_of_comments + 1
|
|
from post as p
|
|
where caf.id = p.community_id and p.id = NEW.post_id;
|
|
|
|
END IF;
|
|
|
|
return null;
|
|
end $$;
|
|
|
|
|
|
-- post_like
|
|
-- select id, score, my_vote from post_fast_view where id = 29 and user_id = 4;
|
|
-- Sample insert
|
|
-- insert into post_like(user_id, post_id, score) values (4, 29, 1);
|
|
-- Sample delete
|
|
-- delete from post_like where user_id = 4 and post_id = 29;
|
|
-- Sample update
|
|
-- update post_like set score = -1 where user_id = 4 and post_id = 29;
|
|
|
|
-- TODO test this a LOT
|
|
create or replace function refresh_post_like()
|
|
returns trigger language plpgsql
|
|
as $$
|
|
begin
|
|
IF (TG_OP = 'DELETE') THEN
|
|
update post_aggregates_fast
|
|
set score = case
|
|
when (OLD.score = 1) then score - 1
|
|
else score + 1 end,
|
|
upvotes = case
|
|
when (OLD.score = 1) then upvotes - 1
|
|
else upvotes end,
|
|
downvotes = case
|
|
when (OLD.score = -1) then downvotes - 1
|
|
else downvotes end
|
|
where id = OLD.post_id;
|
|
|
|
ELSIF (TG_OP = 'INSERT') THEN
|
|
update post_aggregates_fast
|
|
set score = case
|
|
when (NEW.score = 1) then score + 1
|
|
else score - 1 end,
|
|
upvotes = case
|
|
when (NEW.score = 1) then upvotes + 1
|
|
else upvotes end,
|
|
downvotes = case
|
|
when (NEW.score = -1) then downvotes + 1
|
|
else downvotes end
|
|
where id = NEW.post_id;
|
|
END IF;
|
|
|
|
return null;
|
|
end $$;
|
|
|
|
drop trigger refresh_post_like on post_like;
|
|
create trigger refresh_post_like
|
|
after insert or delete
|
|
on post_like
|
|
for each row
|
|
execute procedure refresh_post_like();
|
|
|
|
-- comment_like
|
|
-- select id, score, my_vote from comment_fast_view where id = 29 and user_id = 4;
|
|
-- Sample insert
|
|
-- insert into comment_like(user_id, comment_id, post_id, score) values (4, 29, 51, 1);
|
|
-- Sample delete
|
|
-- delete from comment_like where user_id = 4 and comment_id = 29;
|
|
-- Sample update
|
|
-- update comment_like set score = -1 where user_id = 4 and comment_id = 29;
|
|
create or replace function refresh_comment_like()
|
|
returns trigger language plpgsql
|
|
as $$
|
|
begin
|
|
-- TODO possibly select from comment_fast to get previous scores, instead of re-fetching the views?
|
|
IF (TG_OP = 'DELETE') THEN
|
|
update comment_aggregates_fast
|
|
set score = case
|
|
when (OLD.score = 1) then score - 1
|
|
else score + 1 end,
|
|
upvotes = case
|
|
when (OLD.score = 1) then upvotes - 1
|
|
else upvotes end,
|
|
downvotes = case
|
|
when (OLD.score = -1) then downvotes - 1
|
|
else downvotes end
|
|
where id = OLD.comment_id;
|
|
|
|
ELSIF (TG_OP = 'INSERT') THEN
|
|
update comment_aggregates_fast
|
|
set score = case
|
|
when (NEW.score = 1) then score + 1
|
|
else score - 1 end,
|
|
upvotes = case
|
|
when (NEW.score = 1) then upvotes + 1
|
|
else upvotes end,
|
|
downvotes = case
|
|
when (NEW.score = -1) then downvotes + 1
|
|
else downvotes end
|
|
where id = NEW.comment_id;
|
|
END IF;
|
|
|
|
return null;
|
|
end $$;
|
|
|
|
drop trigger refresh_comment_like on comment_like;
|
|
create trigger refresh_comment_like
|
|
after insert or delete
|
|
on comment_like
|
|
for each row
|
|
execute procedure refresh_comment_like();
|
|
|
|
-- Community user ban
|
|
|
|
drop trigger refresh_community_user_ban on community_user_ban;
|
|
create trigger refresh_community_user_ban
|
|
after insert or delete -- Note this is missing after update
|
|
on community_user_ban
|
|
for each row
|
|
execute procedure refresh_community_user_ban();
|
|
|
|
-- select creator_name, banned_from_community from comment_fast_view where user_id = 4 and content = 'test_before_ban';
|
|
-- select creator_name, banned_from_community, community_id from comment_aggregates_fast where content = 'test_before_ban';
|
|
-- Sample insert
|
|
-- insert into comment(creator_id, post_id, content) values (1198, 341, 'test_before_ban');
|
|
-- insert into community_user_ban(community_id, user_id) values (2, 1198);
|
|
-- Sample delete
|
|
-- delete from community_user_ban where user_id = 1198 and community_id = 2;
|
|
-- delete from comment where content = 'test_before_ban';
|
|
-- update comment_aggregates_fast set banned_from_community = false where creator_id = 1198 and community_id = 2;
|
|
create or replace function refresh_community_user_ban()
|
|
returns trigger language plpgsql
|
|
as $$
|
|
begin
|
|
-- TODO possibly select from comment_fast to get previous scores, instead of re-fetching the views?
|
|
IF (TG_OP = 'DELETE') THEN
|
|
update comment_aggregates_fast set banned_from_community = false where creator_id = OLD.user_id and community_id = OLD.community_id;
|
|
update post_aggregates_fast set banned_from_community = false where creator_id = OLD.user_id and community_id = OLD.community_id;
|
|
ELSIF (TG_OP = 'INSERT') THEN
|
|
update comment_aggregates_fast set banned_from_community = true where creator_id = NEW.user_id and community_id = NEW.community_id;
|
|
update post_aggregates_fast set banned_from_community = true where creator_id = NEW.user_id and community_id = NEW.community_id;
|
|
END IF;
|
|
|
|
return null;
|
|
end $$;
|
|
|
|
-- Community follower
|
|
|
|
drop trigger refresh_community_follower on community_follower;
|
|
create trigger refresh_community_follower
|
|
after insert or delete -- Note this is missing after update
|
|
on community_follower
|
|
for each row
|
|
execute procedure refresh_community_follower();
|
|
|
|
create or replace function refresh_community_follower()
|
|
returns trigger language plpgsql
|
|
as $$
|
|
begin
|
|
IF (TG_OP = 'DELETE') THEN
|
|
update community_aggregates_fast set number_of_subscribers = number_of_subscribers - 1 where id = OLD.community_id;
|
|
ELSIF (TG_OP = 'INSERT') THEN
|
|
update community_aggregates_fast set number_of_subscribers = number_of_subscribers + 1 where id = NEW.community_id;
|
|
END IF;
|
|
|
|
return null;
|
|
end $$;
|