lemmy/migrations/2020-06-30-135809_remove_mat_views/up.sql

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-- Drop the mviews
DROP VIEW post_mview;
DROP MATERIALIZED VIEW user_mview;
DROP VIEW community_mview;
DROP MATERIALIZED VIEW private_message_mview;
DROP VIEW user_mention_mview;
DROP VIEW reply_view;
DROP VIEW comment_mview;
DROP MATERIALIZED VIEW post_aggregates_mview;
DROP MATERIALIZED VIEW community_aggregates_mview;
DROP MATERIALIZED VIEW comment_aggregates_mview;
DROP TRIGGER refresh_private_message ON private_message;
-- User
DROP VIEW user_view;
CREATE VIEW user_view AS
SELECT
u.id,
u.actor_id,
u.name,
u.avatar,
u.email,
u.matrix_user_id,
u.bio,
u.local,
u.admin,
u.banned,
u.show_avatars,
u.send_notifications_to_email,
u.published,
coalesce(pd.posts, 0) AS number_of_posts,
coalesce(pd.score, 0) AS post_score,
coalesce(cd.comments, 0) AS number_of_comments,
coalesce(cd.score, 0) AS comment_score
FROM
user_ u
LEFT JOIN (
SELECT
p.creator_id AS creator_id,
count(DISTINCT p.id) AS posts,
sum(pl.score) AS score
FROM
post p
JOIN post_like pl ON p.id = pl.post_id
GROUP BY
p.creator_id) pd ON u.id = pd.creator_id
LEFT JOIN (
SELECT
c.creator_id,
count(DISTINCT c.id) AS comments,
sum(cl.score) AS score
FROM
comment c
JOIN comment_like cl ON c.id = cl.comment_id
GROUP BY
c.creator_id) cd ON u.id = cd.creator_id;
CREATE TABLE user_fast AS
SELECT
*
FROM
user_view;
ALTER TABLE user_fast
ADD PRIMARY KEY (id);
DROP TRIGGER refresh_user ON user_;
CREATE TRIGGER refresh_user
AFTER INSERT OR UPDATE OR DELETE ON user_
FOR EACH ROW
EXECUTE PROCEDURE refresh_user ();
-- Sample insert
-- insert into user_(name, password_encrypted) values ('test_name', 'bleh');
-- Sample delete
-- delete from user_ where name like 'test_name';
-- Sample update
-- update user_ set avatar = 'hai' where name like 'test_name';
CREATE OR REPLACE FUNCTION refresh_user ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
IF (TG_OP = 'DELETE') THEN
DELETE FROM user_fast
WHERE id = OLD.id;
ELSIF (TG_OP = 'UPDATE') THEN
DELETE FROM user_fast
WHERE id = OLD.id;
INSERT INTO user_fast
SELECT
*
FROM
user_view
WHERE
id = NEW.id;
-- Refresh post_fast, cause of user info changes
DELETE FROM post_aggregates_fast
WHERE creator_id = NEW.id;
INSERT INTO post_aggregates_fast
SELECT
*
FROM
post_aggregates_view
WHERE
creator_id = NEW.id;
DELETE FROM comment_aggregates_fast
WHERE creator_id = NEW.id;
INSERT INTO comment_aggregates_fast
SELECT
*
FROM
comment_aggregates_view
WHERE
creator_id = NEW.id;
ELSIF (TG_OP = 'INSERT') THEN
INSERT INTO user_fast
SELECT
*
FROM
user_view
WHERE
id = NEW.id;
END IF;
RETURN NULL;
END
$$;
-- Post
-- Redoing the views : Credit eiknat
DROP VIEW post_view;
DROP VIEW post_aggregates_view;
CREATE VIEW post_aggregates_view AS
SELECT
p.*,
-- creator details
u.actor_id AS creator_actor_id,
u."local" AS creator_local,
u."name" AS creator_name,
u.avatar AS creator_avatar,
u.banned AS banned,
cb.id::bool AS banned_from_community,
-- community details
c.actor_id AS community_actor_id,
c."local" AS community_local,
c."name" AS community_name,
c.removed AS community_removed,
c.deleted AS community_deleted,
c.nsfw AS community_nsfw,
-- post score data/comment count
coalesce(ct.comments, 0) AS number_of_comments,
coalesce(pl.score, 0) AS score,
coalesce(pl.upvotes, 0) AS upvotes,
coalesce(pl.downvotes, 0) AS downvotes,
hot_rank (coalesce(pl.score, 0), (
CASE WHEN (p.published < ('now'::timestamp - '1 month'::interval)) THEN
p.published
ELSE
greatest (ct.recent_comment_time, p.published)
END)) AS hot_rank,
(
CASE WHEN (p.published < ('now'::timestamp - '1 month'::interval)) THEN
p.published
ELSE
greatest (ct.recent_comment_time, p.published)
END) AS newest_activity_time
FROM
post p
LEFT JOIN user_ u ON p.creator_id = u.id
LEFT JOIN community_user_ban cb ON p.creator_id = cb.user_id
AND p.community_id = cb.community_id
LEFT JOIN community c ON p.community_id = c.id
LEFT JOIN (
SELECT
post_id,
count(*) AS comments,
max(published) AS recent_comment_time
FROM
comment
GROUP BY
post_id) ct ON ct.post_id = p.id
LEFT JOIN (
SELECT
post_id,
sum(score) AS score,
sum(score) FILTER (WHERE score = 1) AS upvotes,
- sum(score) FILTER (WHERE score = - 1) AS downvotes
FROM
post_like
GROUP BY
post_id) pl ON pl.post_id = p.id
ORDER BY
p.id;
CREATE VIEW post_view AS
SELECT
pav.*,
us.id AS user_id,
us.user_vote AS my_vote,
us.is_subbed::bool AS subscribed,
us.is_read::bool AS read,
us.is_saved::bool AS saved
FROM
post_aggregates_view pav
CROSS JOIN LATERAL (
SELECT
u.id,
coalesce(cf.community_id, 0) AS is_subbed,
coalesce(pr.post_id, 0) AS is_read,
coalesce(ps.post_id, 0) AS is_saved,
coalesce(pl.score, 0) AS user_vote
FROM
user_ u
LEFT JOIN community_user_ban cb ON u.id = cb.user_id
AND cb.community_id = pav.community_id
LEFT JOIN community_follower cf ON u.id = cf.user_id
AND cf.community_id = pav.community_id
LEFT JOIN post_read pr ON u.id = pr.user_id
AND pr.post_id = pav.id
LEFT JOIN post_saved ps ON u.id = ps.user_id
AND ps.post_id = pav.id
LEFT JOIN post_like pl ON u.id = pl.user_id
AND pav.id = pl.post_id) AS us
UNION ALL
SELECT
pav.*,
NULL AS user_id,
NULL AS my_vote,
NULL AS subscribed,
NULL AS read,
NULL AS saved
FROM
post_aggregates_view pav;
-- The post fast table
CREATE TABLE post_aggregates_fast AS
SELECT
*
FROM
post_aggregates_view;
ALTER TABLE post_aggregates_fast
ADD PRIMARY KEY (id);
-- For the hot rank resorting
CREATE INDEX idx_post_aggregates_fast_hot_rank_published ON post_aggregates_fast (hot_rank DESC, published DESC);
CREATE VIEW post_fast_view AS
SELECT
pav.*,
us.id AS user_id,
us.user_vote AS my_vote,
us.is_subbed::bool AS subscribed,
us.is_read::bool AS read,
us.is_saved::bool AS saved
FROM
post_aggregates_fast pav
CROSS JOIN LATERAL (
SELECT
u.id,
coalesce(cf.community_id, 0) AS is_subbed,
coalesce(pr.post_id, 0) AS is_read,
coalesce(ps.post_id, 0) AS is_saved,
coalesce(pl.score, 0) AS user_vote
FROM
user_ u
LEFT JOIN community_user_ban cb ON u.id = cb.user_id
AND cb.community_id = pav.community_id
LEFT JOIN community_follower cf ON u.id = cf.user_id
AND cf.community_id = pav.community_id
LEFT JOIN post_read pr ON u.id = pr.user_id
AND pr.post_id = pav.id
LEFT JOIN post_saved ps ON u.id = ps.user_id
AND ps.post_id = pav.id
LEFT JOIN post_like pl ON u.id = pl.user_id
AND pav.id = pl.post_id) AS us
UNION ALL
SELECT
pav.*,
NULL AS user_id,
NULL AS my_vote,
NULL AS subscribed,
NULL AS read,
NULL AS saved
FROM
post_aggregates_fast pav;
DROP TRIGGER refresh_post ON post;
CREATE TRIGGER refresh_post
AFTER INSERT OR UPDATE OR DELETE ON post
FOR EACH ROW
EXECUTE PROCEDURE refresh_post ();
-- Sample select
-- select id, name from post_fast_view where name like 'test_post' and user_id is null;
-- Sample insert
-- insert into post(name, creator_id, community_id) values ('test_post', 2, 2);
-- Sample delete
-- delete from post where name like 'test_post';
-- Sample update
-- update post set community_id = 4 where name like 'test_post';
CREATE OR REPLACE FUNCTION refresh_post ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
IF (TG_OP = 'DELETE') THEN
DELETE FROM post_aggregates_fast
WHERE id = OLD.id;
-- Update community number of posts
UPDATE
community_aggregates_fast
SET
number_of_posts = number_of_posts - 1
WHERE
id = OLD.community_id;
ELSIF (TG_OP = 'UPDATE') THEN
DELETE FROM post_aggregates_fast
WHERE id = OLD.id;
INSERT INTO post_aggregates_fast
SELECT
*
FROM
post_aggregates_view
WHERE
id = NEW.id;
ELSIF (TG_OP = 'INSERT') THEN
INSERT INTO post_aggregates_fast
SELECT
*
FROM
post_aggregates_view
WHERE
id = NEW.id;
-- Update that users number of posts, post score
DELETE FROM user_fast
WHERE id = NEW.creator_id;
INSERT INTO user_fast
SELECT
*
FROM
user_view
WHERE
id = NEW.creator_id;
-- Update community number of posts
UPDATE
community_aggregates_fast
SET
number_of_posts = number_of_posts + 1
WHERE
id = NEW.community_id;
-- Update the hot rank on the post table
-- TODO this might not correctly update it, using a 1 week interval
UPDATE
post_aggregates_fast AS paf
SET
hot_rank = pav.hot_rank
FROM
post_aggregates_view AS pav
WHERE
paf.id = pav.id
AND (pav.published > ('now'::timestamp - '1 week'::interval));
END IF;
RETURN NULL;
END
$$;
-- Community
-- Redoing the views : Credit eiknat
DROP VIEW community_moderator_view;
DROP VIEW community_follower_view;
DROP VIEW community_user_ban_view;
DROP VIEW community_view;
DROP VIEW community_aggregates_view;
CREATE VIEW community_aggregates_view AS
SELECT
c.id,
c.name,
c.title,
c.description,
c.category_id,
c.creator_id,
c.removed,
c.published,
c.updated,
c.deleted,
c.nsfw,
c.actor_id,
c.local,
c.last_refreshed_at,
u.actor_id AS creator_actor_id,
u.local AS creator_local,
u.name AS creator_name,
u.avatar AS creator_avatar,
cat.name AS category_name,
coalesce(cf.subs, 0) AS number_of_subscribers,
coalesce(cd.posts, 0) AS number_of_posts,
coalesce(cd.comments, 0) AS number_of_comments,
hot_rank (cf.subs, c.published) AS hot_rank
FROM
community c
LEFT JOIN user_ u ON c.creator_id = u.id
LEFT JOIN category cat ON c.category_id = cat.id
LEFT JOIN (
SELECT
p.community_id,
count(DISTINCT p.id) AS posts,
count(DISTINCT ct.id) AS comments
FROM
post p
JOIN comment ct ON p.id = ct.post_id
GROUP BY
p.community_id) cd ON cd.community_id = c.id
LEFT JOIN (
SELECT
community_id,
count(*) AS subs
FROM
community_follower
GROUP BY
community_id) cf ON cf.community_id = c.id;
CREATE VIEW community_view AS
SELECT
cv.*,
us.user AS user_id,
us.is_subbed::bool AS subscribed
FROM
community_aggregates_view cv
CROSS JOIN LATERAL (
SELECT
u.id AS user,
coalesce(cf.community_id, 0) AS is_subbed
FROM
user_ u
LEFT JOIN community_follower cf ON u.id = cf.user_id
AND cf.community_id = cv.id) AS us
UNION ALL
SELECT
cv.*,
NULL AS user_id,
NULL AS subscribed
FROM
community_aggregates_view cv;
CREATE VIEW community_moderator_view AS
SELECT
cm.*,
u.actor_id AS user_actor_id,
u.local AS user_local,
u.name AS user_name,
u.avatar AS avatar,
c.actor_id AS community_actor_id,
c.local AS community_local,
c.name AS community_name
FROM
community_moderator cm
LEFT JOIN user_ u ON cm.user_id = u.id
LEFT JOIN community c ON cm.community_id = c.id;
CREATE VIEW community_follower_view AS
SELECT
cf.*,
u.actor_id AS user_actor_id,
u.local AS user_local,
u.name AS user_name,
u.avatar AS avatar,
c.actor_id AS community_actor_id,
c.local AS community_local,
c.name AS community_name
FROM
community_follower cf
LEFT JOIN user_ u ON cf.user_id = u.id
LEFT JOIN community c ON cf.community_id = c.id;
CREATE VIEW community_user_ban_view AS
SELECT
cb.*,
u.actor_id AS user_actor_id,
u.local AS user_local,
u.name AS user_name,
u.avatar AS avatar,
c.actor_id AS community_actor_id,
c.local AS community_local,
c.name AS community_name
FROM
community_user_ban cb
LEFT JOIN user_ u ON cb.user_id = u.id
LEFT JOIN community c ON cb.community_id = c.id;
-- The community fast table
CREATE TABLE community_aggregates_fast AS
SELECT
*
FROM
community_aggregates_view;
ALTER TABLE community_aggregates_fast
ADD PRIMARY KEY (id);
CREATE VIEW community_fast_view AS
SELECT
ac.*,
u.id AS user_id,
(
SELECT
cf.id::boolean
FROM
community_follower cf
WHERE
u.id = cf.user_id
AND ac.id = cf.community_id) AS subscribed
FROM
user_ u
CROSS JOIN (
SELECT
ca.*
FROM
community_aggregates_fast ca) ac
UNION ALL
SELECT
caf.*,
NULL AS user_id,
NULL AS subscribed
FROM
community_aggregates_fast caf;
DROP TRIGGER refresh_community ON community;
CREATE TRIGGER refresh_community
AFTER INSERT OR UPDATE OR DELETE ON community
FOR EACH ROW
EXECUTE PROCEDURE refresh_community ();
-- Sample select
-- select * from community_fast_view where name like 'test_community_name' and user_id is null;
-- Sample insert
-- insert into community(name, title, category_id, creator_id) values ('test_community_name', 'test_community_title', 1, 2);
-- Sample delete
-- delete from community where name like 'test_community_name';
-- Sample update
-- update community set title = 'test_community_title_2' where name like 'test_community_name';
CREATE OR REPLACE FUNCTION refresh_community ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
IF (TG_OP = 'DELETE') THEN
DELETE FROM community_aggregates_fast
WHERE id = OLD.id;
ELSIF (TG_OP = 'UPDATE') THEN
DELETE FROM community_aggregates_fast
WHERE id = OLD.id;
INSERT INTO community_aggregates_fast
SELECT
*
FROM
community_aggregates_view
WHERE
id = NEW.id;
-- Update user view due to owner changes
DELETE FROM user_fast
WHERE id = NEW.creator_id;
INSERT INTO user_fast
SELECT
*
FROM
user_view
WHERE
id = NEW.creator_id;
-- Update post view due to community changes
DELETE FROM post_aggregates_fast
WHERE community_id = NEW.id;
INSERT INTO post_aggregates_fast
SELECT
*
FROM
post_aggregates_view
WHERE
community_id = NEW.id;
-- TODO make sure this shows up in the users page ?
ELSIF (TG_OP = 'INSERT') THEN
INSERT INTO community_aggregates_fast
SELECT
*
FROM
community_aggregates_view
WHERE
id = NEW.id;
END IF;
RETURN NULL;
END
$$;
-- Comment
DROP VIEW user_mention_view;
DROP VIEW comment_view;
DROP VIEW comment_aggregates_view;
CREATE VIEW comment_aggregates_view AS
SELECT
ct.*,
-- community details
p.community_id,
c.actor_id AS community_actor_id,
c."local" AS community_local,
c."name" AS community_name,
-- creator details
u.banned AS banned,
coalesce(cb.id, 0)::bool AS banned_from_community,
u.actor_id AS creator_actor_id,
u.local AS creator_local,
u.name AS creator_name,
u.avatar AS creator_avatar,
-- score details
coalesce(cl.total, 0) AS score,
coalesce(cl.up, 0) AS upvotes,
coalesce(cl.down, 0) AS downvotes,
hot_rank (coalesce(cl.total, 0), ct.published) AS hot_rank
FROM
comment ct
LEFT JOIN post p ON ct.post_id = p.id
LEFT JOIN community c ON p.community_id = c.id
LEFT JOIN user_ u ON ct.creator_id = u.id
LEFT JOIN community_user_ban cb ON ct.creator_id = cb.user_id
AND p.id = ct.post_id
AND p.community_id = cb.community_id
LEFT JOIN (
SELECT
l.comment_id AS id,
sum(l.score) AS total,
count(
CASE WHEN l.score = 1 THEN
1
ELSE
NULL
END) AS up,
count(
CASE WHEN l.score = - 1 THEN
1
ELSE
NULL
END) AS down
FROM
comment_like l
GROUP BY
comment_id) AS cl ON cl.id = ct.id;
CREATE OR REPLACE VIEW comment_view AS (
SELECT
cav.*,
us.user_id AS user_id,
us.my_vote AS my_vote,
us.is_subbed::bool AS subscribed,
us.is_saved::bool AS saved
FROM
comment_aggregates_view cav
CROSS JOIN LATERAL (
SELECT
u.id AS user_id,
coalesce(cl.score, 0) AS my_vote,
coalesce(cf.id, 0) AS is_subbed,
coalesce(cs.id, 0) AS is_saved
FROM
user_ u
LEFT JOIN comment_like cl ON u.id = cl.user_id
AND cav.id = cl.comment_id
LEFT JOIN comment_saved cs ON u.id = cs.user_id
AND cs.comment_id = cav.id
LEFT JOIN community_follower cf ON u.id = cf.user_id
AND cav.community_id = cf.community_id) AS us
UNION ALL
SELECT
cav.*,
NULL AS user_id,
NULL AS my_vote,
NULL AS subscribed,
NULL AS saved
FROM
comment_aggregates_view cav);
-- The fast view
CREATE TABLE comment_aggregates_fast AS
SELECT
*
FROM
comment_aggregates_view;
ALTER TABLE comment_aggregates_fast
ADD PRIMARY KEY (id);
CREATE VIEW comment_fast_view AS
SELECT
cav.*,
us.user_id AS user_id,
us.my_vote AS my_vote,
us.is_subbed::bool AS subscribed,
us.is_saved::bool AS saved
FROM
comment_aggregates_fast cav
CROSS JOIN LATERAL (
SELECT
u.id AS user_id,
coalesce(cl.score, 0) AS my_vote,
coalesce(cf.id, 0) AS is_subbed,
coalesce(cs.id, 0) AS is_saved
FROM
user_ u
LEFT JOIN comment_like cl ON u.id = cl.user_id
AND cav.id = cl.comment_id
LEFT JOIN comment_saved cs ON u.id = cs.user_id
AND cs.comment_id = cav.id
LEFT JOIN community_follower cf ON u.id = cf.user_id
AND cav.community_id = cf.community_id) AS us
UNION ALL
SELECT
cav.*,
NULL AS user_id,
NULL AS my_vote,
NULL AS subscribed,
NULL AS saved
FROM
comment_aggregates_fast cav;
-- Do the reply_view referencing the comment_fast_view
CREATE VIEW reply_fast_view AS
with closereply AS (
SELECT
c2.id,
c2.creator_id AS sender_id,
c.creator_id AS recipient_id
FROM
comment c
INNER JOIN comment c2 ON c.id = c2.parent_id
WHERE
c2.creator_id != c.creator_id
-- Do union where post is null
UNION
SELECT
c.id,
c.creator_id AS sender_id,
p.creator_id AS recipient_id
FROM
comment c,
post p
WHERE
c.post_id = p.id
AND c.parent_id IS NULL
AND c.creator_id != p.creator_id
)
SELECT
cv.*,
closereply.recipient_id
FROM
comment_fast_view cv,
closereply
WHERE
closereply.id = cv.id;
-- user mention
CREATE VIEW user_mention_view AS
SELECT
c.id,
um.id AS user_mention_id,
c.creator_id,
c.creator_actor_id,
c.creator_local,
c.post_id,
c.parent_id,
c.content,
c.removed,
um.read,
c.published,
c.updated,
c.deleted,
c.community_id,
c.community_actor_id,
c.community_local,
c.community_name,
c.banned,
c.banned_from_community,
c.creator_name,
c.creator_avatar,
c.score,
c.upvotes,
c.downvotes,
c.hot_rank,
c.user_id,
c.my_vote,
c.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_mention um,
comment_view c
WHERE
um.comment_id = c.id;
CREATE VIEW user_mention_fast_view AS
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,
u.id AS user_id,
coalesce(cl.score, 0) AS my_vote,
(
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 (
SELECT
ca.*
FROM
comment_aggregates_fast ca) 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
comment_aggregates_fast ac
LEFT JOIN user_mention um ON um.comment_id = ac.id;
DROP TRIGGER refresh_comment ON comment;
CREATE TRIGGER refresh_comment
AFTER INSERT OR UPDATE OR DELETE ON comment
FOR EACH ROW
EXECUTE PROCEDURE refresh_comment ();
-- Sample select
-- select * from comment_fast_view where content = 'test_comment' and user_id is null;
-- Sample insert
-- insert into comment(creator_id, post_id, content) values (2, 2, 'test_comment');
-- Sample delete
-- delete from comment where content like 'test_comment';
-- Sample update
-- update comment set removed = true where content like 'test_comment';
CREATE OR REPLACE FUNCTION refresh_comment ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
IF (TG_OP = 'DELETE') THEN
DELETE FROM comment_aggregates_fast
WHERE id = OLD.id;
-- Update community number of comments
UPDATE
community_aggregates_fast AS caf
SET
number_of_comments = number_of_comments - 1
FROM
post AS p
WHERE
caf.id = p.community_id
AND p.id = OLD.post_id;
ELSIF (TG_OP = 'UPDATE') THEN
DELETE FROM comment_aggregates_fast
WHERE id = OLD.id;
INSERT INTO comment_aggregates_fast
SELECT
*
FROM
comment_aggregates_view
WHERE
id = NEW.id;
ELSIF (TG_OP = 'INSERT') THEN
INSERT INTO comment_aggregates_fast
SELECT
*
FROM
comment_aggregates_view
WHERE
id = NEW.id;
-- Update user view due to comment count
UPDATE
user_fast
SET
number_of_comments = number_of_comments + 1
WHERE
id = NEW.creator_id;
-- Update post view due to comment count, new comment activity time, but only on new posts
-- TODO this could be done more efficiently
DELETE FROM post_aggregates_fast
WHERE id = NEW.post_id;
INSERT INTO post_aggregates_fast
SELECT
*
FROM
post_aggregates_view
WHERE
id = NEW.post_id;
-- Force the hot rank as zero on week-older posts
UPDATE
post_aggregates_fast AS paf
SET
hot_rank = 0
WHERE
paf.id = NEW.post_id
AND (paf.published < ('now'::timestamp - '1 week'::interval));
-- Update community number of comments
UPDATE
community_aggregates_fast AS caf
SET
number_of_comments = number_of_comments + 1
FROM
post AS p
WHERE
caf.id = p.community_id
AND p.id = NEW.post_id;
END IF;
RETURN NULL;
END
$$;
-- post_like
-- select id, score, my_vote from post_fast_view where id = 29 and user_id = 4;
-- Sample insert
-- insert into post_like(user_id, post_id, score) values (4, 29, 1);
-- Sample delete
-- delete from post_like where user_id = 4 and post_id = 29;
-- Sample update
-- update post_like set score = -1 where user_id = 4 and post_id = 29;
-- TODO test this a LOT
CREATE OR REPLACE FUNCTION refresh_post_like ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
IF (TG_OP = 'DELETE') THEN
UPDATE
post_aggregates_fast
SET
score = CASE WHEN (OLD.score = 1) THEN
score - 1
ELSE
score + 1
END,
upvotes = CASE WHEN (OLD.score = 1) THEN
upvotes - 1
ELSE
upvotes
END,
downvotes = CASE WHEN (OLD.score = - 1) THEN
downvotes - 1
ELSE
downvotes
END
WHERE
id = OLD.post_id;
ELSIF (TG_OP = 'INSERT') THEN
UPDATE
post_aggregates_fast
SET
score = CASE WHEN (NEW.score = 1) THEN
score + 1
ELSE
score - 1
END,
upvotes = CASE WHEN (NEW.score = 1) THEN
upvotes + 1
ELSE
upvotes
END,
downvotes = CASE WHEN (NEW.score = - 1) THEN
downvotes + 1
ELSE
downvotes
END
WHERE
id = NEW.post_id;
END IF;
RETURN NULL;
END
$$;
DROP TRIGGER refresh_post_like ON post_like;
CREATE TRIGGER refresh_post_like
AFTER INSERT OR DELETE ON post_like
FOR EACH ROW
EXECUTE PROCEDURE refresh_post_like ();
-- comment_like
-- select id, score, my_vote from comment_fast_view where id = 29 and user_id = 4;
-- Sample insert
-- insert into comment_like(user_id, comment_id, post_id, score) values (4, 29, 51, 1);
-- Sample delete
-- delete from comment_like where user_id = 4 and comment_id = 29;
-- Sample update
-- update comment_like set score = -1 where user_id = 4 and comment_id = 29;
CREATE OR REPLACE FUNCTION refresh_comment_like ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
-- TODO possibly select from comment_fast to get previous scores, instead of re-fetching the views?
IF (TG_OP = 'DELETE') THEN
UPDATE
comment_aggregates_fast
SET
score = CASE WHEN (OLD.score = 1) THEN
score - 1
ELSE
score + 1
END,
upvotes = CASE WHEN (OLD.score = 1) THEN
upvotes - 1
ELSE
upvotes
END,
downvotes = CASE WHEN (OLD.score = - 1) THEN
downvotes - 1
ELSE
downvotes
END
WHERE
id = OLD.comment_id;
ELSIF (TG_OP = 'INSERT') THEN
UPDATE
comment_aggregates_fast
SET
score = CASE WHEN (NEW.score = 1) THEN
score + 1
ELSE
score - 1
END,
upvotes = CASE WHEN (NEW.score = 1) THEN
upvotes + 1
ELSE
upvotes
END,
downvotes = CASE WHEN (NEW.score = - 1) THEN
downvotes + 1
ELSE
downvotes
END
WHERE
id = NEW.comment_id;
END IF;
RETURN NULL;
END
$$;
DROP TRIGGER refresh_comment_like ON comment_like;
CREATE TRIGGER refresh_comment_like
AFTER INSERT OR DELETE ON comment_like
FOR EACH ROW
EXECUTE PROCEDURE refresh_comment_like ();
-- Community user ban
DROP TRIGGER refresh_community_user_ban ON community_user_ban;
CREATE TRIGGER refresh_community_user_ban
AFTER INSERT OR DELETE -- Note this is missing after update
ON community_user_ban
FOR EACH ROW
EXECUTE PROCEDURE refresh_community_user_ban ();
-- select creator_name, banned_from_community from comment_fast_view where user_id = 4 and content = 'test_before_ban';
-- select creator_name, banned_from_community, community_id from comment_aggregates_fast where content = 'test_before_ban';
-- Sample insert
-- insert into comment(creator_id, post_id, content) values (1198, 341, 'test_before_ban');
-- insert into community_user_ban(community_id, user_id) values (2, 1198);
-- Sample delete
-- delete from community_user_ban where user_id = 1198 and community_id = 2;
-- delete from comment where content = 'test_before_ban';
-- update comment_aggregates_fast set banned_from_community = false where creator_id = 1198 and community_id = 2;
CREATE OR REPLACE FUNCTION refresh_community_user_ban ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
-- TODO possibly select from comment_fast to get previous scores, instead of re-fetching the views?
IF (TG_OP = 'DELETE') THEN
UPDATE
comment_aggregates_fast
SET
banned_from_community = FALSE
WHERE
creator_id = OLD.user_id
AND community_id = OLD.community_id;
UPDATE
post_aggregates_fast
SET
banned_from_community = FALSE
WHERE
creator_id = OLD.user_id
AND community_id = OLD.community_id;
ELSIF (TG_OP = 'INSERT') THEN
UPDATE
comment_aggregates_fast
SET
banned_from_community = TRUE
WHERE
creator_id = NEW.user_id
AND community_id = NEW.community_id;
UPDATE
post_aggregates_fast
SET
banned_from_community = TRUE
WHERE
creator_id = NEW.user_id
AND community_id = NEW.community_id;
END IF;
RETURN NULL;
END
$$;
-- Community follower
DROP TRIGGER refresh_community_follower ON community_follower;
CREATE TRIGGER refresh_community_follower
AFTER INSERT OR DELETE -- Note this is missing after update
ON community_follower
FOR EACH ROW
EXECUTE PROCEDURE refresh_community_follower ();
CREATE OR REPLACE FUNCTION refresh_community_follower ()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
IF (TG_OP = 'DELETE') THEN
UPDATE
community_aggregates_fast
SET
number_of_subscribers = number_of_subscribers - 1
WHERE
id = OLD.community_id;
ELSIF (TG_OP = 'INSERT') THEN
UPDATE
community_aggregates_fast
SET
number_of_subscribers = number_of_subscribers + 1
WHERE
id = NEW.community_id;
END IF;
RETURN NULL;
END
$$;