BEGIN;
SET LOCAL lock_timeout = '10s';
SELECT pg_advisory_xact_lock(290926,170004);
DO $guard$
BEGIN
 IF EXISTS(SELECT 1 FROM mne.compatibility_controls WHERE enabled)
 OR EXISTS(SELECT 1 FROM mne.identity_links)
 OR EXISTS(SELECT 1 FROM mne.sector_links)
 OR EXISTS(SELECT 1 FROM mne.business_links)
 OR EXISTS(SELECT 1 FROM mne.compatibility_rejections)
 OR EXISTS(SELECT 1 FROM mne.compatibility_checkpoints)
 OR EXISTS(SELECT 1 FROM mne.parties WHERE party_type='person') THEN
  RAISE EXCEPTION 'Compatibility evidence or dependencies exist; archive and reconcile before DOWN';
 END IF;
END $guard$;
DROP TABLE mne.compatibility_controls,mne.compatibility_rejections,mne.compatibility_checkpoints,
 mne.business_links,mne.sector_links,mne.identity_links;
ALTER TABLE mne.parties DROP CONSTRAINT ck_parties_identity_links;
ALTER TABLE mne.parties ADD CONSTRAINT parties_check CHECK
 ((party_type='organization' AND organization_id IS NOT NULL AND user_id IS NULL)
 OR (party_type='person' AND user_id IS NOT NULL AND organization_id IS NULL));
COMMIT;