create table if not exists user_relation
(
    id            bigserial
        primary key,
    "user"        uuid                     not null,
    target        uuid                     not null,
    relation_type varchar(255)             not null,
    created_at    timestamp with time zone not null
);

create index if not exists idx_user_relation_user
    on user_relation ("user");

create index if not exists idx_user_relation_target
    on user_relation (target);