hpr-tools/Database/hpr_schema.pgsql

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/* =============================================================================
* PostgreSQL Schema - designs for a new HPR database
*
* File: hpr_schema.pgsql
* Created: 2017-03-15
* Updated: 2017-10-16
* =============================================================================
*/
/* ------------------------------------------------------------------------------
* Drop everything to start with. The order is important because of the
* relations between tables. Also, some items are dependent and go with the
* tables.
* ------------------------------------------------------------------------------
*/
DROP TABLE IF EXISTS comments CASCADE;
DROP TABLE IF EXISTS episodes CASCADE;
DROP TABLE IF EXISTS episodes_hosts_xref CASCADE;
DROP TABLE IF EXISTS episodes_series_xref CASCADE;
DROP TABLE IF EXISTS episodes_tags_xref CASCADE;
DROP TABLE IF EXISTS hosts CASCADE;
DROP TABLE IF EXISTS licenses CASCADE;
DROP TABLE IF EXISTS series CASCADE;
DROP TABLE IF EXISTS tags CASCADE;
-- DROP INDEX IF EXISTS episode_release_date_key;
DROP SEQUENCE IF EXISTS comment_seq;
DROP SEQUENCE IF EXISTS episode_seq;
DROP SEQUENCE IF EXISTS host_seq;
DROP SEQUENCE IF EXISTS license_seq;
DROP SEQUENCE IF EXISTS series_seq;
DROP SEQUENCE IF EXISTS tag_seq;
-- DROP VIEW IF EXISTS eht_view;
/* ------------------------------------------------------------------------------
* Table 'licenses' - licenses relating to episodes (needed because 'hosts'
* references it)
* ------------------------------------------------------------------------------
*/
CREATE SEQUENCE license_seq;
ALTER TABLE license_seq
OWNER TO hpradmin;
CREATE TABLE licenses (
id integer default nextval('license_seq') PRIMARY KEY,
short_name varchar(11) NOT NULL UNIQUE,
long_name varchar(40) NOT NULL,
url varchar(80) NOT NULL
);
ALTER TABLE licenses
OWNER TO hpradmin;
/*
* Load the table since it's quite short. Don't set the id to ensure the
* sequence is updated properly.
*/
INSERT INTO licenses (short_name, long_name, url) VALUES
('CC-0', 'Public Domain Dedication', 'http://creativecommons.org/publicdomain/zero/1.0/'),
('CC-BY', 'Attribution', 'http://creativecommons.org/licenses/by/4.0'),
('CC-BY-SA', 'Attribution-ShareAlike', 'http://creativecommons.org/licenses/by-sa/3.0'),
('CC-BY-ND', 'Attribution-NoDerivs', 'http://creativecommons.org/licenses/by-nd/4.0'),
('CC-BY-NC', 'Attribution-NonCommercial', 'http://creativecommons.org/licenses/by-nc/4.0'),
('CC-BY-NC-SA', 'Attribution-NonCommercial-ShareAlike', 'http://creativecommons.org/licenses/by-nc-sa/4.0'),
('CC-BY-NC-ND', 'Attribution-NonCommercial-NoDerivs', 'http://creativecommons.org/licenses/by-nc-nd/4.0');
/* ------------------------------------------------------------------------------
* Table 'episodes' - HPR shows
* ------------------------------------------------------------------------------ */
CREATE SEQUENCE episode_seq;
ALTER TABLE episode_seq
OWNER TO hpradmin;
CREATE TABLE episodes (
id integer default nextval('episode_seq') PRIMARY KEY,
release_date date NOT NULL,
title varchar(100) NOT NULL,
summary varchar(100),
notes text NOT NULL,
explicit smallint NOT NULL DEFAULT '1',
license varchar(11) NOT NULL DEFAULT 'CC-BY-SA'
REFERENCES licenses (short_name),
duration integer NOT NULL DEFAULT 0,
downloads integer NOT NULL DEFAULT 0
);
ALTER TABLE episodes
OWNER TO hpradmin;
CREATE INDEX episode_release_date_key
ON episodes
USING btree
(release_date);
/* ------------------------------------------------------------------------------
* Table 'hosts' - hosts contributing shows
* ------------------------------------------------------------------------------ */
CREATE SEQUENCE host_seq;
ALTER TABLE host_seq
OWNER TO hpradmin;
CREATE TABLE hosts (
id integer default nextval('host_seq') PRIMARY KEY,
host varchar(1024) UNIQUE NOT NULL,
-- email varchar(1024) CHECK (email <> ''),
email varchar(1024) UNIQUE NOT NULL,
profile text,
license varchar(11) NOT NULL DEFAULT 'CC-BY-SA'
REFERENCES licenses (short_name),
local_image smallint NOT NULL DEFAULT '0',
gpg text,
valid smallint NOT NULL DEFAULT '1',
date_added date
);
ALTER TABLE hosts
OWNER TO hpradmin;
/* ------------------------------------------------------------------------------
* Table 'episodes_hosts_xref' - joining table between 'episodes' and 'hosts'
* ------------------------------------------------------------------------------ */
CREATE TABLE episodes_hosts_xref (
episodes_id integer REFERENCES episodes(id)
ON DELETE RESTRICT,
hosts_id integer REFERENCES hosts(id)
ON DELETE CASCADE,
PRIMARY KEY (episodes_id, hosts_id)
);
ALTER TABLE episodes_hosts_xref
OWNER TO hpradmin;
/* ------------------------------------------------------------------------------
* Table 'tags' - tags relating to episodes
* ------------------------------------------------------------------------------ */
CREATE SEQUENCE tag_seq;
ALTER TABLE tag_seq
OWNER TO hpradmin;
CREATE TABLE tags (
id integer default nextval('tag_seq') PRIMARY KEY,
tag varchar(1024) NOT NULL
);
ALTER TABLE tags
OWNER TO hpradmin;
/* ------------------------------------------------------------------------------
* Table 'episodes_tags_xref' - joining table between 'episodes' and 'tags'
* ------------------------------------------------------------------------------ */
CREATE TABLE episodes_tags_xref (
episodes_id integer REFERENCES episodes(id)
ON DELETE RESTRICT,
tags_id integer REFERENCES tags(id)
ON DELETE CASCADE,
PRIMARY KEY (episodes_id, tags_id)
);
ALTER TABLE episodes_tags_xref
OWNER TO hpradmin;
/* ------------------------------------------------------------------------------
* Table 'series' - series grouping for episodes
* ------------------------------------------------------------------------------ */
CREATE SEQUENCE series_seq;
ALTER TABLE series_seq
OWNER TO hpradmin;
CREATE TABLE series (
id integer default nextval('series_seq') PRIMARY KEY,
name varchar(100) NOT NULL,
description text NOT NULL,
private smallint NOT NULL DEFAULT '0',
image text,
valid smallint NOT NULL DEFAULT '1'
);
ALTER TABLE series
OWNER TO hpradmin;
/* ------------------------------------------------------------------------------
* Table 'episodes_series_xref' - joining table between 'episodes' and 'series'
* ------------------------------------------------------------------------------ */
CREATE TABLE episodes_series_xref (
episodes_id integer REFERENCES episodes(id)
ON DELETE RESTRICT,
series_id integer REFERENCES series(id)
ON DELETE CASCADE,
PRIMARY KEY (episodes_id, series_id)
);
ALTER TABLE episodes_series_xref
OWNER TO hpradmin;
/* ------------------------------------------------------------------------------
* Table 'comments' - comments relating to episodes
* ------------------------------------------------------------------------------ */
CREATE SEQUENCE comment_seq;
ALTER TABLE comment_seq
OWNER TO hpradmin;
CREATE TABLE comments (
id integer default nextval('comment_seq') PRIMARY KEY,
eps_id integer REFERENCES episodes(id)
ON DELETE RESTRICT,
comment_timestamp timestamp without time zone NOT NULL,
comment_author_name varchar(1024),
comment_title varchar(1024),
comment_text text,
last_changed timestamp without time zone NOT NULL
DEFAULT timezone('UTC'::text, now())
);
ALTER TABLE comments
OWNER TO hpradmin;
/* ------------------------------------------------------------------------------
* Tables from "Today with a Techie" for further processing
* ------------------------------------------------------------------------------ */
CREATE SEQUENCE twat_hosts_seq;
ALTER TABLE twat_hosts_seq
OWNER TO hpradmin;
CREATE TABLE twat_hosts (
id integer default nextval('twat_hosts_seq') PRIMARY KEY,
host varchar(1024) NOT NULL,
email varchar(1024),
website varchar(1024),
repeat integer NOT NULL
);
ALTER TABLE twat_hosts
OWNER TO hpradmin;
CREATE SEQUENCE twat_episodes_seq;
ALTER TABLE twat_episodes_seq
OWNER TO hpradmin;
CREATE TABLE twat_episodes (
ep_num integer default nextval('twat_episodes_seq') PRIMARY KEY,
date integer NOT NULL,
host varchar(1024) NOT NULL,
topic varchar(1024) NOT NULL,
writeup text,
url varchar(1024) NOT NULL
);
ALTER TABLE twat_episodes
OWNER TO hpradmin;
/* ------------------------------------------------------------------------------
* Experimental views
* ------------------------------------------------------------------------------ */
--
-- eh_view
--
CREATE OR REPLACE VIEW eh_view AS
SELECT
ep.id,
ep.release_date,
ep.title,
(SELECT string_agg(host, ', ' ORDER BY host)
FROM hosts h2,
episodes_hosts_xref eh2
WHERE eh2.hosts_id = h2.id
GROUP BY eh2.episodes_id
HAVING eh2.episodes_id = ep.id) AS hosts
FROM episodes ep
GROUP BY ep.id
ORDER BY ep.id;
ALTER TABLE eh_view
OWNER TO hpradmin;
--
-- eht_view
--
CREATE OR REPLACE VIEW eht_view AS
SELECT e.*,
h.host,
t.tag,
(SELECT string_agg(tag, ', ')
FROM tags t2,
episodes_tags_xref et2
WHERE et2.tags_id = t2.id
GROUP BY et2.episodes_id
HAVING et2.episodes_id = e.id) AS tags
FROM episodes e,
hosts h,
episodes_hosts_xref eh,
episodes_tags_xref et,
tags t
WHERE e.id = eh.episodes_id
AND h.id = eh.hosts_id
AND e.id = et.episodes_id
AND et.tags_id = t.id
GROUP BY e.id,
h.host,
t.tag
ORDER BY e.id;
-- CREATE OR REPLACE VIEW eht_view AS
-- SELECT
-- e.*,
-- h.host,
-- t.tag,
-- (SELECT string_agg(tag, ', ')
-- FROM tags t2, episodes_tags_xref et2
-- WHERE et2.tags_id = t2.id
-- GROUP BY et2.episodes_id
-- HAVING et2.episodes_id = e.id) AS tags
-- FROM episodes e, hosts h, episodes_hosts_xref eh, episodes_tags_xref et, tags t
-- WHERE e.id = eh.episodes_id
-- AND h.id = eh.hosts_id
-- AND e.id = et.episodes_id
-- AND et.tags_id = t.id
-- GROUP BY e.id,h.host,t.tag
-- ORDER BY e.id;
ALTER TABLE eht_view
OWNER TO hpradmin;
-- Footer ---------------------------------------------------------------------
-- vim: syntax=pgsql:ts=8:sw=4:ai:tw=78:et:fo=tcrqn21:nu:rnu