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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.
236 lines
6 KiB
PL/PgSQL
236 lines
6 KiB
PL/PgSQL
-- Add user aggregates
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CREATE TABLE user_aggregates (
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id serial PRIMARY KEY,
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user_id int REFERENCES user_ ON UPDATE CASCADE ON DELETE CASCADE NOT NULL,
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post_count bigint NOT NULL DEFAULT 0,
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post_score bigint NOT NULL DEFAULT 0,
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comment_count bigint NOT NULL DEFAULT 0,
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comment_score bigint NOT NULL DEFAULT 0,
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UNIQUE (user_id)
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);
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INSERT INTO user_aggregates (user_id, post_count, post_score, comment_count, comment_score)
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SELECT
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u.id,
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coalesce(pd.posts, 0),
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coalesce(pd.score, 0),
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coalesce(cd.comments, 0),
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coalesce(cd.score, 0)
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FROM
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user_ u
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LEFT JOIN (
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SELECT
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p.creator_id,
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count(DISTINCT p.id) AS posts,
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sum(pl.score) AS score
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FROM
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post p
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LEFT JOIN post_like pl ON p.id = pl.post_id
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GROUP BY
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p.creator_id) pd ON u.id = pd.creator_id
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LEFT JOIN (
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SELECT
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c.creator_id,
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count(DISTINCT c.id) AS comments,
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sum(cl.score) AS score
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FROM
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comment c
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LEFT JOIN comment_like cl ON c.id = cl.comment_id
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GROUP BY
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c.creator_id) cd ON u.id = cd.creator_id;
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-- Add user aggregate triggers
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-- initial user add
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CREATE FUNCTION user_aggregates_user ()
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RETURNS TRIGGER
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LANGUAGE plpgsql
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AS $$
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BEGIN
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IF (TG_OP = 'INSERT') THEN
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INSERT INTO user_aggregates (user_id)
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VALUES (NEW.id);
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ELSIF (TG_OP = 'DELETE') THEN
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DELETE FROM user_aggregates
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WHERE user_id = OLD.id;
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END IF;
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RETURN NULL;
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END
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$$;
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CREATE TRIGGER user_aggregates_user
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AFTER INSERT OR DELETE ON user_
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FOR EACH ROW
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EXECUTE PROCEDURE user_aggregates_user ();
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-- post count
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CREATE FUNCTION user_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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user_aggregates
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SET
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post_count = post_count + 1
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WHERE
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user_id = NEW.creator_id;
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ELSIF (TG_OP = 'DELETE') THEN
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UPDATE
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user_aggregates
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SET
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post_count = post_count - 1
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WHERE
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user_id = OLD.creator_id;
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-- If the post gets deleted, the score calculation trigger won't fire,
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-- so you need to re-calculate
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UPDATE
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user_aggregates ua
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SET
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post_score = pd.score
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FROM (
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SELECT
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u.id,
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coalesce(0, sum(pl.score)) AS score
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-- User join because posts could be empty
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FROM
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user_ u
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LEFT JOIN post p ON u.id = p.creator_id
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LEFT JOIN post_like pl ON p.id = pl.post_id
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GROUP BY
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u.id) pd
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WHERE
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ua.user_id = OLD.creator_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 user_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 user_aggregates_post_count ();
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-- post score
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CREATE FUNCTION user_aggregates_post_score ()
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RETURNS TRIGGER
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LANGUAGE plpgsql
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AS $$
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BEGIN
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IF (TG_OP = 'INSERT') THEN
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-- Need to get the post creator, not the voter
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UPDATE
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user_aggregates ua
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SET
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post_score = post_score + NEW.score
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FROM
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post p
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WHERE
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ua.user_id = p.creator_id
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AND p.id = NEW.post_id;
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ELSIF (TG_OP = 'DELETE') THEN
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UPDATE
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user_aggregates ua
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SET
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post_score = post_score - OLD.score
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FROM
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post p
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WHERE
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ua.user_id = p.creator_id
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AND p.id = OLD.post_id;
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END IF;
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RETURN NULL;
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END
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$$;
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CREATE TRIGGER user_aggregates_post_score
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AFTER INSERT OR DELETE ON post_like
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FOR EACH ROW
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EXECUTE PROCEDURE user_aggregates_post_score ();
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-- comment count
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CREATE FUNCTION user_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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user_aggregates
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SET
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comment_count = comment_count + 1
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WHERE
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user_id = NEW.creator_id;
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ELSIF (TG_OP = 'DELETE') THEN
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UPDATE
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user_aggregates
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SET
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comment_count = comment_count - 1
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WHERE
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user_id = OLD.creator_id;
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-- If the comment gets deleted, the score calculation trigger won't fire,
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-- so you need to re-calculate
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UPDATE
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user_aggregates ua
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SET
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comment_score = cd.score
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FROM (
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SELECT
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u.id,
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coalesce(0, sum(cl.score)) AS score
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-- User join because comments could be empty
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FROM
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user_ u
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LEFT JOIN comment c ON u.id = c.creator_id
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LEFT JOIN comment_like cl ON c.id = cl.comment_id
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GROUP BY
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u.id) cd
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WHERE
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ua.user_id = OLD.creator_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 user_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 user_aggregates_comment_count ();
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-- comment score
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CREATE FUNCTION user_aggregates_comment_score ()
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RETURNS TRIGGER
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LANGUAGE plpgsql
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AS $$
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BEGIN
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IF (TG_OP = 'INSERT') THEN
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-- Need to get the post creator, not the voter
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UPDATE
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user_aggregates ua
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SET
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comment_score = comment_score + NEW.score
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FROM
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comment c
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WHERE
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ua.user_id = c.creator_id
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AND c.id = NEW.comment_id;
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ELSIF (TG_OP = 'DELETE') THEN
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UPDATE
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user_aggregates ua
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SET
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comment_score = comment_score - OLD.score
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FROM
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comment c
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WHERE
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ua.user_id = c.creator_id
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AND c.id = OLD.comment_id;
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END IF;
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RETURN NULL;
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END
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$$;
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CREATE TRIGGER user_aggregates_comment_score
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AFTER INSERT OR DELETE ON comment_like
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FOR EACH ROW
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EXECUTE PROCEDURE user_aggregates_comment_score ();
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