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Merge pull request #1192 from LemmyNet/fix_fast_triggers_2 

Fixing hot_rank_active fast triggers. Fixes #1190
pull/1201/head
Nutomic 2020-10-12 10:33:46 +00:00 committed by GitHub
parent f44612970a a903cae00b
commit cc9bb56d2d
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2 changed files with 176 additions and 0 deletions
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79
migrations/2020-10-10-035723_fix_fast_triggers_2/down.sql 100644
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@ -0,0 +1,79 @@
create or replace function refresh_post()
returns trigger language plpgsql
as $$
begin
IF (TG_OP = 'DELETE') THEN
delete from post_aggregates_fast where id = OLD.id;
-- Update community number of posts
update community_aggregates_fast set number_of_posts = number_of_posts - 1 where id = OLD.community_id;
ELSIF (TG_OP = 'UPDATE') THEN
delete from post_aggregates_fast where id = OLD.id;
insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.id on conflict (id) do nothing;
ELSIF (TG_OP = 'INSERT') THEN
insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.id;
-- Update that users number of posts, post score
delete from user_fast where id = NEW.creator_id;
insert into user_fast select * from user_view where id = NEW.creator_id on conflict (id) do nothing;
-- Update community number of posts
update community_aggregates_fast set number_of_posts = number_of_posts + 1 where id = NEW.community_id;
-- Update the hot rank on the post table
-- TODO this might not correctly update it, using a 1 week interval
update post_aggregates_fast as paf
set hot_rank = pav.hot_rank
from post_aggregates_view as pav
where paf.id = pav.id and (pav.published > ('now'::timestamp - '1 week'::interval));
END IF;
return null;
end $$;
create or replace function refresh_comment()
returns trigger language plpgsql
as $$
begin
IF (TG_OP = 'DELETE') THEN
delete from comment_aggregates_fast where id = OLD.id;
-- Update community number of comments
update community_aggregates_fast as caf
set number_of_comments = number_of_comments - 1
from post as p
where caf.id = p.community_id and p.id = OLD.post_id;
ELSIF (TG_OP = 'UPDATE') THEN
delete from comment_aggregates_fast where id = OLD.id;
insert into comment_aggregates_fast select * from comment_aggregates_view where id = NEW.id on conflict (id) do nothing;
ELSIF (TG_OP = 'INSERT') THEN
insert into comment_aggregates_fast select * from comment_aggregates_view where id = NEW.id;
-- Update user view due to comment count
update user_fast
set number_of_comments = number_of_comments + 1
where id = NEW.creator_id;
-- Update post view due to comment count, new comment activity time, but only on new posts
-- TODO this could be done more efficiently
delete from post_aggregates_fast where id = NEW.post_id;
insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.post_id on conflict (id) do nothing;
-- Force the hot rank as zero on week-older posts
update post_aggregates_fast as paf
set hot_rank = 0
where paf.id = NEW.post_id and (paf.published < ('now'::timestamp - '1 week'::interval));
-- Update community number of comments
update community_aggregates_fast as caf
set number_of_comments = number_of_comments + 1
from post as p
where caf.id = p.community_id and p.id = NEW.post_id;
END IF;
return null;
end $$;

97
migrations/2020-10-10-035723_fix_fast_triggers_2/up.sql 100644
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-- Forgot to add hot rank active to these two triggers
create or replace function refresh_post()
returns trigger language plpgsql
as $$
begin
IF (TG_OP = 'DELETE') THEN
delete from post_aggregates_fast where id = OLD.id;
-- Update community number of posts
update community_aggregates_fast set number_of_posts = number_of_posts - 1 where id = OLD.community_id;
ELSIF (TG_OP = 'UPDATE') THEN
delete from post_aggregates_fast where id = OLD.id;
insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.id on conflict (id) do nothing;
ELSIF (TG_OP = 'INSERT') THEN
insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.id;
-- Update that users number of posts, post score
delete from user_fast where id = NEW.creator_id;
insert into user_fast select * from user_view where id = NEW.creator_id on conflict (id) do nothing;
-- Update community number of posts
update community_aggregates_fast set number_of_posts = number_of_posts + 1 where id = NEW.community_id;
-- Update the hot rank on the post table
-- TODO this might not correctly update it, using a 1 week interval
update post_aggregates_fast as paf
set
hot_rank = pav.hot_rank,
hot_rank_active = pav.hot_rank_active
from post_aggregates_view as pav
where paf.id = pav.id and (pav.published > ('now'::timestamp - '1 week'::interval));
END IF;
return null;
end $$;
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 on conflict (id) do nothing;
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 on conflict (id) do nothing;
-- Update the comment hot_ranks as of last week
update comment_aggregates_fast as caf
set
hot_rank = cav.hot_rank,
hot_rank_active = cav.hot_rank_active
from comment_aggregates_view as cav
where caf.id = cav.id and (cav.published > ('now'::timestamp - '1 week'::interval));
-- Update the post ranks
update post_aggregates_fast as paf
set
hot_rank = pav.hot_rank,
hot_rank_active = pav.hot_rank_active
from post_aggregates_view as pav
where paf.id = pav.id and (pav.published > ('now'::timestamp - '1 week'::interval));
-- Force the hot rank active as zero on 2 day-older posts (necro-bump)
update post_aggregates_fast as paf
set hot_rank_active = 0
where paf.id = NEW.post_id and (paf.published < ('now'::timestamp - '2 days'::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 $$;