mirror of
https://github.com/LemmyNet/lemmy.git
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121 lines
2.7 KiB
SQL
121 lines
2.7 KiB
SQL
-- Drop first
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DROP VIEW IF EXISTS community_view;
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DROP VIEW IF EXISTS community_aggregates_view;
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DROP VIEW IF EXISTS community_fast_view;
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DROP TABLE IF EXISTS 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
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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
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post p
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JOIN comment ct ON p.id = ct.post_id
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GROUP BY
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p.community_id) 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
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community_follower
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GROUP BY
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community_id) 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
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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
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user_ u
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LEFT JOIN community_follower cf ON u.id = cf.user_id
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AND cf.community_id = cv.id) 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
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community_aggregates_view cv;
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-- The community fast table
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CREATE TABLE community_aggregates_fast AS
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SELECT
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*
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FROM
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community_aggregates_view;
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ALTER TABLE community_aggregates_fast
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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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(
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SELECT
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cf.id::boolean
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FROM
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community_follower cf
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WHERE
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u.id = cf.user_id
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AND ac.id = cf.community_id) AS subscribed
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FROM
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user_ u
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CROSS JOIN (
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SELECT
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ca.*
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FROM
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community_aggregates_fast ca) 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
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community_aggregates_fast caf;
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