CREATE TABLE addressbooks (
      id SERIAL NOT NULL,
      principaluri VARCHAR(255),
      displayname VARCHAR(255),
      uri VARCHAR(200),
      description TEXT,
      ctag INTEGER NOT NULL DEFAULT 1
  );
  
  ALTER TABLE ONLY addressbooks
      ADD CONSTRAINT addressbooks_pkey PRIMARY KEY (id);
  
  CREATE UNIQUE INDEX addressbooks_ukey
      ON addressbooks USING btree (principaluri, uri);
  
  CREATE TABLE cards (
      id SERIAL NOT NULL,
      addressbookid INTEGER NOT NULL,
      carddata TEXT,
      uri VARCHAR(200),
      lastmodified INTEGER
  );
  
  ALTER TABLE ONLY cards
      ADD CONSTRAINT cards_pkey PRIMARY KEY (id);
  
  CREATE UNIQUE INDEX cards_ukey
      ON cards USING btree (addressbookid, uri);
  
  ALTER TABLE ONLY cards
      ADD CONSTRAINT cards_addressbookid_fkey FOREIGN KEY (addressbookid) REFERENCES addressbooks(id)
          ON DELETE CASCADE;