lemmy/migrations/2020-02-07-210055_add_comme.../down.sql

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DROP VIEW reply_view;
DROP VIEW user_mention_view;
DROP VIEW user_mention_mview;
DROP VIEW comment_view;
DROP VIEW comment_mview;
DROP MATERIALIZED VIEW comment_aggregates_mview;
DROP VIEW comment_aggregates_view;
-- reply and comment view
CREATE VIEW comment_aggregates_view AS
SELECT
c.*,
(
SELECT
community_id
FROM
post p
WHERE
p.id = c.post_id), (
SELECT
u.banned
FROM
user_ u
WHERE
c.creator_id = u.id) AS banned,
(
SELECT
cb.id::bool
FROM
community_user_ban cb,
post p
WHERE
c.creator_id = cb.user_id
AND p.id = c.post_id
AND p.community_id = cb.community_id) AS banned_from_community,
(
SELECT
name
FROM
user_
WHERE
c.creator_id = user_.id) AS creator_name,
(
SELECT
avatar
FROM
user_
WHERE
c.creator_id = user_.id) AS creator_avatar,
coalesce(sum(cl.score), 0) AS score,
count(
CASE WHEN cl.score = 1 THEN
1
ELSE
NULL
END) AS upvotes,
count(
CASE WHEN cl.score = - 1 THEN
1
ELSE
NULL
END) AS downvotes
FROM
comment c
LEFT JOIN comment_like cl ON c.id = cl.comment_id
GROUP BY
c.id;
CREATE MATERIALIZED VIEW comment_aggregates_mview AS
SELECT
*
FROM
comment_aggregates_view;
CREATE UNIQUE INDEX idx_comment_aggregates_mview_id ON comment_aggregates_mview (id);
CREATE VIEW comment_view AS
with all_comment AS (
SELECT
ca.*
FROM
comment_aggregates_view ca
)
SELECT
ac.*,
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
FROM
user_ u
CROSS JOIN all_comment ac
LEFT JOIN comment_like cl ON u.id = cl.user_id
AND ac.id = cl.comment_id
UNION ALL
SELECT
ac.*,
NULL AS user_id,
NULL AS my_vote,
NULL AS saved
FROM
all_comment ac;
CREATE VIEW comment_mview AS
with all_comment AS (
SELECT
ca.*
FROM
comment_aggregates_mview ca
)
SELECT
ac.*,
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
FROM
user_ u
CROSS JOIN all_comment ac
LEFT JOIN comment_like cl ON u.id = cl.user_id
AND ac.id = cl.comment_id
UNION ALL
SELECT
ac.*,
NULL AS user_id,
NULL AS my_vote,
NULL AS saved
FROM
all_comment ac;
-- Do the reply_view referencing the comment_mview
CREATE VIEW reply_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_mview 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.post_id,
c.parent_id,
c.content,
c.removed,
um.read,
c.published,
c.updated,
c.deleted,
c.community_id,
c.banned,
c.banned_from_community,
c.creator_name,
c.creator_avatar,
c.score,
c.upvotes,
c.downvotes,
c.user_id,
c.my_vote,
c.saved,
um.recipient_id
FROM
user_mention um,
comment_view c
WHERE
um.comment_id = c.id;
CREATE VIEW user_mention_mview AS
with all_comment AS (
SELECT
ca.*
FROM
comment_aggregates_mview ca
)
SELECT
ac.id,
um.id AS user_mention_id,
ac.creator_id,
ac.post_id,
ac.parent_id,
ac.content,
ac.removed,
um.read,
ac.published,
ac.updated,
ac.deleted,
ac.community_id,
ac.banned,
ac.banned_from_community,
ac.creator_name,
ac.creator_avatar,
ac.score,
ac.upvotes,
ac.downvotes,
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
FROM
user_ u
CROSS JOIN all_comment 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.post_id,
ac.parent_id,
ac.content,
ac.removed,
um.read,
ac.published,
ac.updated,
ac.deleted,
ac.community_id,
ac.banned,
ac.banned_from_community,
ac.creator_name,
ac.creator_avatar,
ac.score,
ac.upvotes,
ac.downvotes,
NULL AS user_id,
NULL AS my_vote,
NULL AS saved,
um.recipient_id
FROM
all_comment ac
LEFT JOIN user_mention um ON um.comment_id = ac.id;