create table rsstg_updates (owner integer, update jsonb);
create unique index rsstg_updates__id on rsstg_updates(update->>'update_id');
-- create table rsstg_users (id integer);
create table rsstg_channel (
channel_id bigint primary key,
username text);
create unique index rsstg_channel__username on rsstg_channel(username);
create table rsstg_source (
source_id serial,
channel_id integer not null,
url text not null,
last_fetch timestamptz,
last_scrape timestamptz default now(),
enabled boolean default false,
iv_hash text,
owner bigint not null);
create unique index rsstg_source__source_id on rsstg_source(source_id);
create unique index rsstg_source__channel_id__owner on rsstg_source(channel_id, owner);
create index rsstg_source__owner on rsstg_source(owner);
create table rsstg_post (
source_id integer not null,
date int not null,
url text not null,
hour smallint generated always as (extract('hour' from posted)) stored,
FOREIGN KEY (source_id) REFERENCES rsstg_source(source_id)
);
create unique index rsstg_post__url on rsstg_post(url);
create index rsstg_post__hour on rsstg_post(hour);
create or replace view rsstg_order as
select source_id, coalesce(last_scrape + make_interval(0,0,0,0,0,(60 / coalesce(activity, 1))::integer), now() - interval '1 minute') as next_fetch
from rsstg_source natural left join
(select source_id, count(*) as activity
from rsstg_post where
hour = extract('hour' from now())
group by source_id) as act
where enabled
order by next_fetch;