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-rw-r--r--util/updates/2020-08-07-threads.sql46
1 files changed, 46 insertions, 0 deletions
diff --git a/util/updates/2020-08-07-threads.sql b/util/updates/2020-08-07-threads.sql
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+-- * Convert thread identifiers to vndbids
+-- * Remove threads_poll_votes.tid
+-- * Add two ON DELETE CASCADE's
+-- * Replace threads.count with threads.c_(count,lastnum)
+
+ALTER TABLE threads_poll_votes DROP COLUMN tid;
+ALTER TABLE threads_poll_votes ADD PRIMARY KEY (optid,uid);
+
+ALTER TABLE threads_poll_options DROP CONSTRAINT threads_poll_options_tid_fkey;
+ALTER TABLE threads_poll_options ALTER COLUMN tid TYPE vndbid USING vndbid('t', tid);
+
+ALTER TABLE threads_boards DROP CONSTRAINT threads_boards_tid_fkey;
+ALTER TABLE threads_boards ALTER COLUMN tid DROP DEFAULT;
+ALTER TABLE threads_boards ALTER COLUMN tid TYPE vndbid USING vndbid('t', tid);
+
+ALTER TABLE threads DROP CONSTRAINT threads_id_fkey;
+ALTER TABLE threads_posts DROP CONSTRAINT threads_posts_tid_fkey;
+ALTER TABLE threads_posts ALTER COLUMN tid DROP DEFAULT;
+ALTER TABLE threads_posts ALTER COLUMN tid TYPE vndbid USING vndbid('t', tid);
+
+ALTER TABLE threads ALTER COLUMN id DROP DEFAULT;
+ALTER TABLE threads ALTER COLUMN id TYPE vndbid USING vndbid('t', id);
+ALTER TABLE threads ALTER COLUMN id SET DEFAULT vndbid('t', nextval('threads_id_seq')::int);
+ALTER TABLE threads ADD CONSTRAINT threads_id_check CHECK(vndbid_type(id) = 't');
+
+ALTER TABLE threads ADD CONSTRAINT threads_id_fkey FOREIGN KEY (id, count) REFERENCES threads_posts (tid, num) DEFERRABLE INITIALLY DEFERRED;
+ALTER TABLE threads_poll_options ADD CONSTRAINT threads_poll_options_tid_fkey FOREIGN KEY (tid) REFERENCES threads (id) ON DELETE CASCADE;
+ALTER TABLE threads_posts ADD CONSTRAINT threads_posts_tid_fkey FOREIGN KEY (tid) REFERENCES threads (id) ON DELETE CASCADE;
+ALTER TABLE threads_boards ADD CONSTRAINT threads_boards_tid_fkey FOREIGN KEY (tid) REFERENCES threads (id) ON DELETE CASCADE;
+
+ALTER TABLE threads DROP COLUMN count;
+ALTER TABLE threads ADD COLUMN c_count smallint NOT NULL DEFAULT 0; -- Number of non-hidden posts
+ALTER TABLE threads ADD COLUMN c_lastnum smallint NOT NULL DEFAULT 1; -- 'num' of the most recent non-hidden post
+
+ALTER TABLE threads_posts ALTER COLUMN num DROP DEFAULT;
+ALTER TABLE threads_posts ALTER COLUMN uid DROP DEFAULT;
+ALTER TABLE threads_posts ALTER COLUMN uid DROP NOT NULL;
+ALTER TABLE threads_posts ADD CONSTRAINT threads_posts_first_nonhidden CHECK(num > 1 OR NOT hidden);
+
+UPDATE threads
+ SET c_count = (SELECT COUNT(*) FROM threads_posts WHERE NOT hidden AND tid = threads.id)
+ , c_lastnum = (SELECT MAX(num) FROM threads_posts WHERE NOT hidden AND tid = threads.id);
+
+UPDATE threads_posts SET uid = NULL WHERE uid = 0;
+
+\i sql/triggers.sql