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-- First restore the old columns:
ALTER TABLE threads ADD COLUMN author_name VARCHAR;
ALTER TABLE threads ADD COLUMN author_email VARCHAR;
ALTER TABLE posts ADD COLUMN author_name VARCHAR;
ALTER TABLE posts ADD COLUMN author_email VARCHAR;
-- Then select the data back into them:
UPDATE threads SET author_name = users.name,
author_email = users.email
FROM users
WHERE threads.user_id = users.id;
UPDATE posts SET author_name = users.name,
author_email = users.email
FROM users
WHERE posts.user_id = users.id;
-- add the constraints back:
ALTER TABLE threads ALTER COLUMN author_name SET NOT NULL;
ALTER TABLE threads ALTER COLUMN author_email SET NOT NULL;
ALTER TABLE posts ALTER COLUMN author_name SET NOT NULL;
ALTER TABLE posts ALTER COLUMN author_email SET NOT NULL;
-- reset the index view:
CREATE OR REPLACE VIEW thread_index AS
SELECT t.id AS thread_id,
t.title AS title,
t.author_name AS thread_author,
t.posted AS created,
t.sticky AS sticky,
p.id AS post_id,
p.author_name AS post_author,
p.posted AS posted
FROM threads t
JOIN (SELECT DISTINCT ON (thread_id)
id, thread_id, author_name, posted
FROM posts
ORDER BY thread_id, id DESC) AS p
ON t.id = p.thread_id
ORDER BY t.sticky DESC, p.id DESC;
-- reset the search view:
DROP MATERIALIZED VIEW search_index;
CREATE MATERIALIZED VIEW search_index AS
SELECT p.id AS post_id,
p.author_name AS author,
t.id AS thread_id,
t.title AS title,
p.body AS body,
setweight(to_tsvector('english', t.title), 'B') ||
setweight(to_tsvector('english', p.body), 'A') ||
setweight(to_tsvector('simple', t.author_name), 'C') ||
setweight(to_tsvector('simple', p.author_name), 'C') AS document
FROM posts p
JOIN threads t
ON t.id = p.thread_id;
CREATE INDEX idx_fts_search ON search_index USING gin(document);
-- and drop the users table and columns:
ALTER TABLE posts DROP COLUMN user_id;
ALTER TABLE threads DROP COLUMN user_id;
DROP TABLE users;
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