80 lines
3 KiB
MySQL
80 lines
3 KiB
MySQL
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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 on conflict (id) do nothing;
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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 on conflict (id) do nothing;
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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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create or replace function refresh_comment()
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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 comment_aggregates_fast where id = OLD.id;
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-- Update community number of comments
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update community_aggregates_fast as caf
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set number_of_comments = number_of_comments - 1
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from post as p
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where caf.id = p.community_id and p.id = OLD.post_id;
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ELSIF (TG_OP = 'UPDATE') THEN
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delete from comment_aggregates_fast where id = OLD.id;
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insert into comment_aggregates_fast select * from comment_aggregates_view where id = NEW.id on conflict (id) do nothing;
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ELSIF (TG_OP = 'INSERT') THEN
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insert into comment_aggregates_fast select * from comment_aggregates_view where id = NEW.id;
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-- Update user view due to comment count
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update user_fast
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set number_of_comments = number_of_comments + 1
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where id = NEW.creator_id;
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-- Update post view due to comment count, new comment activity time, but only on new posts
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-- TODO this could be done more efficiently
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delete from post_aggregates_fast where id = NEW.post_id;
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insert into post_aggregates_fast select * from post_aggregates_view where id = NEW.post_id on conflict (id) do nothing;
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-- Force the hot rank as zero on week-older posts
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update post_aggregates_fast as paf
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set hot_rank = 0
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where paf.id = NEW.post_id and (paf.published < ('now'::timestamp - '1 week'::interval));
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-- Update community number of comments
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update community_aggregates_fast as caf
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set number_of_comments = number_of_comments + 1
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from post as p
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where caf.id = p.community_id and p.id = NEW.post_id;
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END IF;
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return null;
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end $$;
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