fedimovies/migrations/V0034__actor_profile__add_hostname.sql

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CREATE TABLE instance (
hostname VARCHAR(100) PRIMARY KEY
);
INSERT INTO instance
SELECT DISTINCT split_part(acct, '@', 2)
FROM actor_profile
WHERE acct <> username;
ALTER TABLE actor_profile
ADD COLUMN hostname VARCHAR(100) REFERENCES instance (hostname) ON DELETE RESTRICT;
UPDATE actor_profile
SET hostname = split_part(acct, '@', 2)
WHERE acct <> username;
ALTER TABLE actor_profile
ADD CONSTRAINT actor_profile_hostname_check CHECK ((hostname IS NULL) = (actor_json IS NULL));
ALTER TABLE actor_profile
DROP COLUMN acct;
ALTER TABLE actor_profile
ADD COLUMN acct VARCHAR(200) UNIQUE
GENERATED ALWAYS AS (CASE WHEN hostname IS NULL THEN username ELSE username || '@' || hostname END) STORED;