crawler.sql
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	-- -- return a random sample of repos, containing %percent repositories
	-- create or replace function repos_random_sample_array(percent real)
	-- returns setof repos as $$
	-- declare
	-- samples integer;
	-- repo repos%rowtype;
	-- ids integer[];
	-- begin
	-- select floor(count() / 100 percent) into samples from repos;
	-- ids := array(select id from repos order by id);
	-- for i in 1 .. samples loop
	-- select * into repo
	-- from repos
	-- where id = ids[round(random() * samples)];
	-- return next repo;
	-- end loop;
	-- return;
	-- end
	-- $$
	-- language plpgsql;

	-- return a random sample of repositories
	create or replace function repos_random_sample(percent real)
	returns setof repos as $$
	declare
	sample_size integer;
	begin
	select floor(count() / 100 percent) into sample_size from repos;
	return query
	select * from repos
	order by random()
	limit sample_size;
	return;
	end
	$$
	language plpgsql;

	-- -- return a random sample of repositories
	-- create or replace function random_sample_sequence(percent real)
	-- returns setof repos as $$
	-- declare
	-- sample_size integer;
	-- seq_size integer;
	-- min_id integer;
	-- max_id integer;
	-- begin
	-- select floor(count() / 100 percent) into sample_size from repos;
	-- select min(id) into min_id from repos;
	-- select max(id) into max_id from repos;
	-- seq_size := sample_size * 3; -- IDs are sparse, generate a larger sequence
	-- -- to have enough of them
	-- return query
	-- select * from repos
	-- where id in
	-- (select floor(random() * (max_id - min_id + 1))::integer
	-- + min_id
	-- from generate_series(1, seq_size))
	-- order by random() limit sample_size;
	-- return;
	-- end
	-- $$
	-- language plpgsql;

	create or replace function repos_well_known()
	returns setof repos as $$
	begin
	return query
	select * from repos
	where full_name like 'apache/%'
	or full_name like 'eclipse/%'
	or full_name like 'mozilla/%'
	or full_name = 'torvalds/linux'
	or full_name = 'gcc-mirror/gcc';
	return;
	end
	$$
	language plpgsql;

	create table crawl_history (
	id bigserial primary key,
	repo integer references repos(id),
	task_id uuid, -- celery task id
	date timestamptz not null,
	duration interval,
	status boolean,
	result json,
	stdout text,
	stderr text
	);

	create index on crawl_history (repo);

	create view missing_orig_repos AS
	select *
	from orig_repos as repos
	where not exists
	(select 1 from crawl_history as history
	where history.repo = repos.id);

	create view missing_fork_repos AS
	select *
	from fork_repos as repos
	where not exists
	(select 1 from crawl_history as history
	where history.repo = repos.id);

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