ALTER TABLE users ADD COLUMN IF NOT EXISTS profile_username TEXT;
ALTER TABLE users ADD COLUMN IF NOT EXISTS is_future_races_public BOOLEAN NOT NULL DEFAULT FALSE;
ALTER TABLE users ADD COLUMN IF NOT EXISTS is_completed_races_public BOOLEAN NOT NULL DEFAULT FALSE;

UPDATE users
SET is_future_races_public = is_profile_public,
    is_completed_races_public = is_profile_public
WHERE is_profile_public = TRUE;

CREATE UNIQUE INDEX IF NOT EXISTS users_profile_username_normalized_key
  ON users (LOWER(profile_username))
  WHERE profile_username IS NOT NULL;