DO $$
BEGIN
   IF NOT EXISTS (
      SELECT 1 
      FROM pg_class c
      JOIN pg_namespace n ON n.oid = c.relnamespace
      WHERE c.relname = 'carrier_id_seq'
        AND n.nspname = 'lookup'
   ) THEN
      CREATE SEQUENCE lookup.carrier_id_seq OWNED BY lookup.carrier.id;
   END IF;
END$$;

-- Make id use sequence
ALTER TABLE lookup.carrier ALTER COLUMN id SET DEFAULT nextval('lookup.carrier_id_seq');

-- Reset sequence based on max(id) from lookup.carrier
SELECT setval(
   'lookup.carrier_id_seq',
   (SELECT COALESCE(MAX(id), 0) + 1 FROM lookup.carrier),
   false
);




-- Create a sequence if not exists
DO $$
BEGIN
   IF NOT EXISTS (SELECT 1 FROM pg_class WHERE relname = 'carrier_id_seq') THEN
      CREATE SEQUENCE carrier_id_seq OWNED BY carrier.id;
   END IF;
END$$;

-- Make id use sequence
ALTER TABLE carrier ALTER COLUMN id SET DEFAULT nextval('carrier_id_seq');


SELECT setval('carrier_id_seq', (SELECT COALESCE(MAX(id), 0) + 1 FROM carrier), false);