mirror of
https://github.com/LemmyNet/lemmy.git
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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.
535 lines
15 KiB
PL/PgSQL
Vendored
535 lines
15 KiB
PL/PgSQL
Vendored
-- Dropping all the fast tables
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drop table user_fast;
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drop view post_fast_view;
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drop table post_aggregates_fast;
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drop view community_fast_view;
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drop table community_aggregates_fast;
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drop view reply_fast_view;
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drop view user_mention_fast_view;
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drop view comment_fast_view;
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drop table comment_aggregates_fast;
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-- Re-adding all the triggers, functions, and mviews
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-- private message
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create materialized view private_message_mview as select * from private_message_view;
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create unique index idx_private_message_mview_id on private_message_mview (id);
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-- Create the triggers
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create or replace function refresh_private_message()
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returns trigger language plpgsql
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as $$
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begin
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refresh materialized view concurrently private_message_mview;
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return null;
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end $$;
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create trigger refresh_private_message
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after insert or update or delete or truncate
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on private_message
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for each statement
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execute procedure refresh_private_message();
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-- user
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create or replace function refresh_user()
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returns trigger language plpgsql
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as $$
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begin
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refresh materialized view concurrently user_mview;
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refresh materialized view concurrently comment_aggregates_mview; -- cause of bans
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refresh materialized view concurrently post_aggregates_mview;
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return null;
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end $$;
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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 or truncate
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on user_
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for each statement
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execute procedure refresh_user();
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drop view user_view cascade;
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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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(select count(*) from post p where p.creator_id = u.id) as number_of_posts,
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(select coalesce(sum(score), 0) from post p, post_like pl where u.id = p.creator_id and p.id = pl.post_id) as post_score,
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(select count(*) from comment c where c.creator_id = u.id) as number_of_comments,
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(select coalesce(sum(score), 0) from comment c, comment_like cl where u.id = c.creator_id and c.id = cl.comment_id) as comment_score
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from user_ u;
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create materialized view user_mview as select * from user_view;
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create unique index idx_user_mview_id on user_mview (id);
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-- community
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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 or truncate
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on community
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for each statement
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execute procedure refresh_community();
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create or replace function refresh_community()
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returns trigger language plpgsql
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as $$
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begin
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refresh materialized view concurrently post_aggregates_mview;
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refresh materialized view concurrently community_aggregates_mview;
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refresh materialized view concurrently user_mview;
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return null;
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end $$;
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drop view community_aggregates_view cascade;
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create view community_aggregates_view as
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-- Now that there's public and private keys, you have to be explicit here
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select 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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(select actor_id from user_ u where c.creator_id = u.id) as creator_actor_id,
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(select local from user_ u where c.creator_id = u.id) as creator_local,
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(select name from user_ u where c.creator_id = u.id) as creator_name,
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(select avatar from user_ u where c.creator_id = u.id) as creator_avatar,
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(select name from category ct where c.category_id = ct.id) as category_name,
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(select count(*) from community_follower cf where cf.community_id = c.id) as number_of_subscribers,
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(select count(*) from post p where p.community_id = c.id) as number_of_posts,
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(select count(*) from comment co, post p where c.id = p.community_id and p.id = co.post_id) as number_of_comments,
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hot_rank((select count(*) from community_follower cf where cf.community_id = c.id), c.published) as hot_rank
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from community c;
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create materialized view community_aggregates_mview as select * from community_aggregates_view;
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create unique index idx_community_aggregates_mview_id on community_aggregates_mview (id);
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create view community_view as
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with all_community as
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(
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select
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ca.*
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from community_aggregates_view ca
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)
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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 all_community ac
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union all
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select
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ac.*,
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null as user_id,
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null as subscribed
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from all_community ac
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;
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create view community_mview as
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with all_community as
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(
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select
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ca.*
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from community_aggregates_mview ca
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)
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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 all_community ac
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union all
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select
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ac.*,
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null as user_id,
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null as subscribed
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from all_community ac
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;
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-- Post
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drop view post_view;
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drop view post_aggregates_view;
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-- regen post 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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(select u.banned from user_ u where p.creator_id = u.id) as banned,
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(select cb.id::bool from community_user_ban cb where p.creator_id = cb.user_id and p.community_id = cb.community_id) as banned_from_community,
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(select actor_id from user_ where p.creator_id = user_.id) as creator_actor_id,
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(select local from user_ where p.creator_id = user_.id) as creator_local,
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(select name from user_ where p.creator_id = user_.id) as creator_name,
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(select avatar from user_ where p.creator_id = user_.id) as creator_avatar,
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(select actor_id from community where p.community_id = community.id) as community_actor_id,
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(select local from community where p.community_id = community.id) as community_local,
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(select name from community where p.community_id = community.id) as community_name,
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(select removed from community c where p.community_id = c.id) as community_removed,
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(select deleted from community c where p.community_id = c.id) as community_deleted,
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(select nsfw from community c where p.community_id = c.id) as community_nsfw,
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(select count(*) from comment where comment.post_id = p.id) as number_of_comments,
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coalesce(sum(pl.score), 0) as score,
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count (case when pl.score = 1 then 1 else null end) as upvotes,
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count (case when pl.score = -1 then 1 else null end) as downvotes,
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hot_rank(coalesce(sum(pl.score) , 0),
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(
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case when (p.published < ('now'::timestamp - '1 month'::interval)) then p.published -- Prevents necro-bumps
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else greatest(c.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 when (p.published < ('now'::timestamp - '1 month'::interval)) then p.published -- Prevents necro-bumps
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else greatest(c.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 post_like pl on p.id = pl.post_id
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left join (
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select post_id,
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max(published) as recent_comment_time
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from comment
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group by 1
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) c on p.id = c.post_id
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group by p.id, c.recent_comment_time;
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create materialized view post_aggregates_mview as select * from post_aggregates_view;
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create unique index idx_post_aggregates_mview_id on post_aggregates_mview (id);
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create view post_view as
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with all_post as (
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select
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pa.*
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from post_aggregates_view pa
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)
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select
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ap.*,
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u.id as user_id,
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coalesce(pl.score, 0) as my_vote,
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(select cf.id::bool from community_follower cf where u.id = cf.user_id and cf.community_id = ap.community_id) as subscribed,
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(select pr.id::bool from post_read pr where u.id = pr.user_id and pr.post_id = ap.id) as read,
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(select ps.id::bool from post_saved ps where u.id = ps.user_id and ps.post_id = ap.id) as saved
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from user_ u
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cross join all_post ap
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left join post_like pl on u.id = pl.user_id and ap.id = pl.post_id
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union all
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select
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ap.*,
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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 all_post ap
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;
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create view post_mview as
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with all_post as (
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select
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pa.*
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from post_aggregates_mview pa
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)
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select
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ap.*,
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u.id as user_id,
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coalesce(pl.score, 0) as my_vote,
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(select cf.id::bool from community_follower cf where u.id = cf.user_id and cf.community_id = ap.community_id) as subscribed,
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(select pr.id::bool from post_read pr where u.id = pr.user_id and pr.post_id = ap.id) as read,
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(select ps.id::bool from post_saved ps where u.id = ps.user_id and ps.post_id = ap.id) as saved
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from user_ u
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cross join all_post ap
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left join post_like pl on u.id = pl.user_id and ap.id = pl.post_id
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union all
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select
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ap.*,
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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 all_post ap
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;
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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 or truncate
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on post
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for each statement
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execute procedure refresh_post();
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create or replace function refresh_post()
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returns trigger language plpgsql
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as $$
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begin
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refresh materialized view concurrently post_aggregates_mview;
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refresh materialized view concurrently user_mview;
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return null;
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end $$;
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-- User mention, comment, reply
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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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-- reply and comment view
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create view comment_aggregates_view as
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select
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c.*,
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(select community_id from post p where p.id = c.post_id),
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(select co.actor_id from post p, community co where p.id = c.post_id and p.community_id = co.id) as community_actor_id,
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(select co.local from post p, community co where p.id = c.post_id and p.community_id = co.id) as community_local,
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(select co.name from post p, community co where p.id = c.post_id and p.community_id = co.id) as community_name,
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(select u.banned from user_ u where c.creator_id = u.id) as banned,
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(select cb.id::bool from community_user_ban cb, post p where c.creator_id = cb.user_id and p.id = c.post_id and p.community_id = cb.community_id) as banned_from_community,
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(select actor_id from user_ where c.creator_id = user_.id) as creator_actor_id,
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(select local from user_ where c.creator_id = user_.id) as creator_local,
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(select name from user_ where c.creator_id = user_.id) as creator_name,
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(select avatar from user_ where c.creator_id = user_.id) as creator_avatar,
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coalesce(sum(cl.score), 0) as score,
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count (case when cl.score = 1 then 1 else null end) as upvotes,
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count (case when cl.score = -1 then 1 else null end) as downvotes,
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hot_rank(coalesce(sum(cl.score) , 0), c.published) as hot_rank
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from comment c
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left join comment_like cl on c.id = cl.comment_id
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group by c.id;
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create materialized view comment_aggregates_mview as select * from comment_aggregates_view;
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create unique index idx_comment_aggregates_mview_id on comment_aggregates_mview (id);
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create view comment_view as
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with all_comment as
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(
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select
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ca.*
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from comment_aggregates_view ca
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)
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select
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ac.*,
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u.id as user_id,
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coalesce(cl.score, 0) as my_vote,
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(select cf.id::boolean from community_follower cf where u.id = cf.user_id and ac.community_id = cf.community_id) as subscribed,
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(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved
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from user_ u
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cross join all_comment ac
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left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
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union all
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select
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ac.*,
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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 saved
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from all_comment ac
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;
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create view comment_mview as
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with all_comment as
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(
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select
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ca.*
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from comment_aggregates_mview ca
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)
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select
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ac.*,
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u.id as user_id,
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coalesce(cl.score, 0) as my_vote,
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(select cf.id::boolean from community_follower cf where u.id = cf.user_id and ac.community_id = cf.community_id) as subscribed,
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(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved
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from user_ u
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cross join all_comment ac
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left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
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union all
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select
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ac.*,
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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 saved
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from all_comment ac
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;
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-- Do the reply_view referencing the comment_mview
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create view reply_view as
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with closereply as (
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select
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c2.id,
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c2.creator_id as sender_id,
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c.creator_id as recipient_id
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from comment c
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inner join comment c2 on c.id = c2.parent_id
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where c2.creator_id != c.creator_id
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-- Do union where post is null
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union
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select
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c.id,
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c.creator_id as sender_id,
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p.creator_id as recipient_id
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from comment c, post p
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where c.post_id = p.id and c.parent_id is null and c.creator_id != p.creator_id
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)
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select cv.*,
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closereply.recipient_id
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from comment_mview cv, closereply
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where closereply.id = cv.id
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;
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-- user mention
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create view user_mention_view as
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select
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c.id,
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um.id as user_mention_id,
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c.creator_id,
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c.creator_actor_id,
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c.creator_local,
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c.post_id,
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c.parent_id,
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c.content,
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c.removed,
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um.read,
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c.published,
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c.updated,
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c.deleted,
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c.community_id,
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c.community_actor_id,
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c.community_local,
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c.community_name,
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c.banned,
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c.banned_from_community,
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c.creator_name,
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c.creator_avatar,
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c.score,
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c.upvotes,
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c.downvotes,
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c.hot_rank,
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c.user_id,
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c.my_vote,
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c.saved,
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um.recipient_id,
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(select actor_id from user_ u where u.id = um.recipient_id) as recipient_actor_id,
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(select local from user_ u where u.id = um.recipient_id) as recipient_local
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from user_mention um, comment_view c
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where um.comment_id = c.id;
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create view user_mention_mview as
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with all_comment as
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(
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select
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ca.*
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from comment_aggregates_mview ca
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)
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select
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ac.id,
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um.id as user_mention_id,
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ac.creator_id,
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ac.creator_actor_id,
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ac.creator_local,
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ac.post_id,
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ac.parent_id,
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ac.content,
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ac.removed,
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um.read,
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ac.published,
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ac.updated,
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ac.deleted,
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ac.community_id,
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ac.community_actor_id,
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ac.community_local,
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ac.community_name,
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ac.banned,
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ac.banned_from_community,
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ac.creator_name,
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ac.creator_avatar,
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ac.score,
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ac.upvotes,
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ac.downvotes,
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ac.hot_rank,
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u.id as user_id,
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coalesce(cl.score, 0) as my_vote,
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(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 all_comment 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 all_comment ac
|
|
left join user_mention um on um.comment_id = ac.id
|
|
;
|
|
|