lemmy/migrations/2020-07-12-100442_add_post_title_to_comments_view/down.sql

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DROP VIEW user_mention_view;
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DROP VIEW reply_fast_view;
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DROP VIEW comment_fast_view;
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DROP VIEW comment_view;
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DROP VIEW user_mention_fast_view;
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DROP TABLE comment_aggregates_fast;
DROP VIEW comment_aggregates_view;
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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.published AS creator_published,
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;
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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);
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CREATE TABLE comment_aggregates_fast AS
SELECT
*
FROM
comment_aggregates_view;
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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
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cav.*,
NULL AS user_id,
NULL AS my_vote,
NULL AS subscribed,
NULL AS saved
FROM
comment_aggregates_fast cav;
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CREATE VIEW user_mention_view AS
SELECT
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c.id,
um.id AS user_mention_id,
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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;
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CREATE VIEW user_mention_fast_view AS
SELECT
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ac.id,
um.id AS user_mention_id,
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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,
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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
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ac.id,
um.id AS user_mention_id,
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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,
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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;
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-- 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
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)
SELECT
cv.*,
closereply.recipient_id
FROM
comment_fast_view cv,
closereply
WHERE
closereply.id = cv.id;