drop table if exists orderbook_items;
create table orderbook_items
(
    id bigserial,
    time timestamp default current_timestamp,
    figi text not null,
    ticker text not null,
    price decimal not null,
    count bigint not null,
    item_type int not null default 1,
    primary key (id)
);

CREATE INDEX orderbook_items_index ON orderbook_items USING btree(figi, time, item_type);