-- Ported from the SQLite migration of the same number.
-- Which directory keeps an account, and its id there: an Active Directory
-- objectGUID, so a person whose mail changes there is still the same account
-- here. suspended_by_sync is an account the directory sync suspended,
-- because it was disabled or gone there; one an administrator suspended
-- here is not, and is never reinstated by the sync.
CREATE TABLE user_directory (
  user_id           TEXT PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
  directory         TEXT NOT NULL,
  external_id       TEXT NOT NULL,
  suspended_by_sync INTEGER NOT NULL DEFAULT 0,
  synced_at         BIGINT NOT NULL DEFAULT 0,
  UNIQUE (directory, external_id)
);