set client_min_messages = 'warning';

create table data1 (
    id serial primary key,
    data text
);

create unique index idx_data1_uq on data1 (data);

create index idx_data1_rand on data1 (id, data);

create table data2 (
    id serial primary key,
    data text,
    -- old_id integer references data1,
    constraint uq_data2 unique (data)
);

create index idx_data2_rand on data2 (id, data);