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be1389420b
* SQL format checking, 1. * SQL format checking, 2. * SQL format checking, 3. * SQL format checking, 4. * SQL format checking, 5. * Running pg_format * Getting rid of comment. * Upping pg_format version. * Using git ls-files for sql format check. * Fixing sql lints. * Addressing PR comments.
181 lines
4.7 KiB
PL/PgSQL
181 lines
4.7 KiB
PL/PgSQL
-- Add community aggregates
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CREATE TABLE community_aggregates (
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id serial PRIMARY KEY,
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community_id int REFERENCES community ON UPDATE CASCADE ON DELETE CASCADE NOT NULL,
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subscribers bigint NOT NULL DEFAULT 0,
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posts bigint NOT NULL DEFAULT 0,
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comments bigint NOT NULL DEFAULT 0,
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published timestamp NOT NULL DEFAULT now(),
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UNIQUE (community_id)
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);
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INSERT INTO community_aggregates (community_id, subscribers, posts, comments, published)
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SELECT
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c.id,
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coalesce(cf.subs, 0) AS subscribers,
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coalesce(cd.posts, 0) AS posts,
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coalesce(cd.comments, 0) AS comments,
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c.published
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FROM
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community c
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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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LEFT 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_follower.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_follower.community_id) cf ON cf.community_id = c.id;
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-- Add community aggregate triggers
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-- initial community add
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CREATE FUNCTION community_aggregates_community ()
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RETURNS TRIGGER
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LANGUAGE plpgsql
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AS $$
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BEGIN
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IF (TG_OP = 'INSERT') THEN
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INSERT INTO community_aggregates (community_id)
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VALUES (NEW.id);
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ELSIF (TG_OP = 'DELETE') THEN
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DELETE FROM community_aggregates
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WHERE community_id = OLD.id;
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END IF;
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RETURN NULL;
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END
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$$;
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CREATE TRIGGER community_aggregates_community
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AFTER INSERT OR DELETE ON community
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FOR EACH ROW
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EXECUTE PROCEDURE community_aggregates_community ();
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-- post count
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CREATE FUNCTION community_aggregates_post_count ()
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RETURNS TRIGGER
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LANGUAGE plpgsql
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AS $$
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BEGIN
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IF (TG_OP = 'INSERT') THEN
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UPDATE
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community_aggregates
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SET
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posts = posts + 1
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WHERE
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community_id = NEW.community_id;
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ELSIF (TG_OP = 'DELETE') THEN
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UPDATE
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community_aggregates
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SET
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posts = posts - 1
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WHERE
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community_id = OLD.community_id;
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-- Update the counts if the post got deleted
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UPDATE
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community_aggregates ca
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SET
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posts = coalesce(cd.posts, 0),
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comments = coalesce(cd.comments, 0)
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FROM (
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SELECT
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c.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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community c
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LEFT JOIN post p ON c.id = p.community_id
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LEFT JOIN comment ct ON p.id = ct.post_id
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GROUP BY
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c.id) cd
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WHERE
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ca.community_id = OLD.community_id;
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END IF;
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RETURN NULL;
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END
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$$;
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CREATE TRIGGER community_aggregates_post_count
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AFTER INSERT OR DELETE ON post
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FOR EACH ROW
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EXECUTE PROCEDURE community_aggregates_post_count ();
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-- comment count
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CREATE FUNCTION community_aggregates_comment_count ()
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RETURNS TRIGGER
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LANGUAGE plpgsql
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AS $$
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BEGIN
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IF (TG_OP = 'INSERT') THEN
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UPDATE
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community_aggregates ca
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SET
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comments = comments + 1
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FROM
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comment c,
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post p
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WHERE
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p.id = c.post_id
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AND p.id = NEW.post_id
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AND ca.community_id = p.community_id;
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ELSIF (TG_OP = 'DELETE') THEN
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UPDATE
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community_aggregates ca
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SET
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comments = comments - 1
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FROM
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comment c,
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post p
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WHERE
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p.id = c.post_id
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AND p.id = OLD.post_id
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AND ca.community_id = p.community_id;
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END IF;
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RETURN NULL;
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END
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$$;
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CREATE TRIGGER community_aggregates_comment_count
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AFTER INSERT OR DELETE ON comment
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FOR EACH ROW
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EXECUTE PROCEDURE community_aggregates_comment_count ();
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-- subscriber count
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CREATE FUNCTION community_aggregates_subscriber_count ()
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RETURNS TRIGGER
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LANGUAGE plpgsql
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AS $$
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BEGIN
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IF (TG_OP = 'INSERT') THEN
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UPDATE
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community_aggregates
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SET
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subscribers = subscribers + 1
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WHERE
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community_id = NEW.community_id;
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ELSIF (TG_OP = 'DELETE') THEN
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UPDATE
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community_aggregates
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SET
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subscribers = subscribers - 1
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WHERE
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community_id = OLD.community_id;
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END IF;
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RETURN NULL;
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END
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$$;
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CREATE TRIGGER community_aggregates_subscriber_count
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AFTER INSERT OR DELETE ON community_follower
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FOR EACH ROW
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EXECUTE PROCEDURE community_aggregates_subscriber_count ();
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