text: create table if not exists flyway (
    version text
  );
  -- drop table if exists memento cascade;
  create table if not exists memento (
    prefix varchar(64) not null,
    name varchar(64) not null,
    value text not null,
    sort_order integer not null default 0,
    created bigint not null default 0,
    modified bigint not null default 0,
    version integer not null default 1,
    constraint memento_pk primary key(prefix, name)
  );
  