99 lines
2.9 KiB
PL/PgSQL
99 lines
2.9 KiB
PL/PgSQL
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CREATE VIEW orig_repos AS
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SELECT id, name, full_name, html_url, description, last_seen
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FROM repos
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WHERE NOT fork;
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CREATE VIEW fork_repos AS
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SELECT id, name, full_name, html_url, description, last_seen
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FROM repos
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WHERE fork
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CREATE EXTENSION pg_trgm;
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CREATE INDEX ix_trgm_repos_description ON
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repos USING gin (description gin_trgm_ops);
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CREATE INDEX ix_trgm_repos_full_name ON
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repos USING gin (full_name gin_trgm_ops);
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CREATE TABLE repos_history (
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ts timestamp DEFAULT current_timestamp,
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repos integer NOT NULL,
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fork_repos integer,
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orig_repos integer
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);
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CREATE VIEW repo_creations AS
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SELECT today.ts :: date as date,
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today.repos - yesterday.repos as repos,
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today.fork_repos - yesterday.fork_repos as fork_repos,
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today.orig_repos - yesterday.orig_repos as orig_repos
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FROM repos_history today
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JOIN repos_history yesterday ON
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(yesterday.ts = (SELECT max(ts)
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FROM repos_history
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WHERE ts < today.ts));
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-- -- return a random sample of repos, containing %percent repositories
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-- create or replace function repos_random_sample_array(percent real)
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-- returns setof repos as $$
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-- declare
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-- samples integer;
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-- repo repos%rowtype;
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-- ids integer[];
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-- begin
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-- select floor(count(*) / 100 * percent) into samples from repos;
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-- ids := array(select id from repos order by id);
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-- for i in 1 .. samples loop
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-- select * into repo
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-- from repos
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-- where id = ids[round(random() * samples)];
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-- return next repo;
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-- end loop;
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-- return;
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-- end
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-- $$
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-- language plpgsql;
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-- return a random sample of repositories
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create or replace function repos_random_sample(percent real)
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returns setof repos as $$
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declare
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sample_size integer;
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begin
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select floor(count(*) / 100 * percent) into sample_size from repos;
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return query
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select * from repos
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order by random()
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limit sample_size;
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return;
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end
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$$
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language plpgsql;
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-- -- return a random sample of repositories
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-- create or replace function random_sample_sequence(percent real)
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-- returns setof repos as $$
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-- declare
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-- sample_size integer;
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-- seq_size integer;
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-- min_id integer;
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-- max_id integer;
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-- begin
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-- select floor(count(*) / 100 * percent) into sample_size from repos;
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-- select min(id) into min_id from repos;
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-- select max(id) into max_id from repos;
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-- seq_size := sample_size * 3; -- IDs are sparse, generate a larger sequence
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-- -- to have enough of them
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-- return query
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-- select * from repos
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-- where id in
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-- (select floor(random() * (max_id - min_id + 1))::integer
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-- + min_id
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-- from generate_series(1, seq_size))
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-- order by random() limit sample_size;
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-- return;
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-- end
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-- $$
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-- language plpgsql;
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