mirror of https://github.com/LemmyNet/lemmy.git
100 lines
2.3 KiB
SQL
100 lines
2.3 KiB
SQL
-- Drop first
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drop view community_view;
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drop view community_aggregates_view;
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drop view community_fast_view;
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drop table community_aggregates_fast;
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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.icon,
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c.banner,
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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.preferred_username as creator_preferred_username,
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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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left 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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-- 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; |