apisub.sql

BEGIN;

DROP TABLE IF EXISTS subscribe CASCADE;
DROP TABLE IF EXISTS api CASCADE;
DROP TABLE IF EXISTS localuser CASCADE;
DROP TABLE IF EXISTS utcstudent;

CREATE TABLE api (
  code INTEGER PRIMARY KEY,
  name TEXT NOT NULL,
  description TEXT,
  year INTEGER NOT NULL,
  semester CHAR(1) NOT NULL,
  dbegin DATE NOT NULL,
  dend DATE NOT NULL,
  size INTEGER,
  ects INTEGER NOT NULL,
  mail TEXT NOT NULL,
  CHECK (code>0),
  CHECK (year>2018 AND year<2100),
  CHECK (semester IN ('H','E')),
  CHECK (dbegin<=dend),
  CHECK (size>0),
  CHECK (ects>0),
  UNIQUE (name,year,semester)
);

/* Table created to collect CAS user surname and firstname */
CREATE TABLE localuser (
  utclogin TEXT PRIMARY KEY,
  surname TEXT,
  firstname TEXT,
  explanation TEXT
);
/* MAJ Apisub H19
ALTER TABLE localuser ADD explanation TEXT;
*/

CREATE TABLE subscribe (
  utclogin TEXT NOT NULL REFERENCES localuser(utclogin),
  api INTEGER REFERENCES api(code),
  subdate DATE NOT NULL,
  PRIMARY KEY (utclogin,api)
);
/* MAJ Apisub H19
ALTER TABLE subscribe ADD FOREIGN KEY (utclogin) REFERENCES localuser(utclogin);
*/

/* Table created to retrieve CSV info from DFP */
CREATE TABLE utcstudent (
  surname TEXT NOT NULL,
  firstname TEXT NOT NULL,
  speciality TEXT NOT NULL,
  level TEXT NOT NULL
);

/*
\COPY utcstudent (firstname,surname,speciality,level) FROM '/home/stc/inscriptions_A18.csv' WITH CSV HEADER DELIMITER ';' QUOTE '"'
*/

CREATE OR REPLACE FUNCTION unaccent_string(TEXT)
RETURNS TEXT
IMMUTABLE
STRICT
LANGUAGE SQL
AS $$
SELECT translate(
    $1,
    'âãäåÁÂÃÄÅèééêëÈÉÉÊËìíîïìÌÍÎÏÌóôõöÒÓÔÕÖùúûüÙÚÛÜ',
    'aaaaAAAAAeeeeeEEEEEiiiiiIIIIIooooOOOOOuuuuUUUU'
);
$$;

CREATE OR REPLACE VIEW vlocaluser AS
SELECT l.utclogin, u.surname, u.firstname, MAX(u.speciality) AS speciality, MAX(u.level) AS level,
  CASE WHEN COUNT(*)>1 THEN 'duplication' END AS warning,
  l.utclogin || 'etu.utc.fr' AS utcmail
FROM localuser l
LEFT JOIN utcstudent u ON l.surname=u.surname AND l.firstname=unaccent_string(u.firstname)
GROUP BY l.utclogin, u.surname, u.firstname;

CREATE OR REPLACE VIEW vapi AS
SELECT
ap.code,
CASE WHEN ap.code<10 THEN '000'||ap.code WHEN ap.code>=10 THEN '00'||ap.code END AS normcode,
ap.name, ap.year, ap.semester,
TO_CHAR(ap.dbegin,'TMday FMDD TMmonth') AS dbegin, TO_CHAR(ap.dend,'TMday FMDD TMmonth') AS dend,
ap.mail, ap.ects, ap.size,
COUNT(su.utclogin) AS nbsub
FROM api ap LEFT JOIN subscribe su ON ap.code=su.api
GROUP BY ap.code, normcode, ap.name, ap.year, ap.semester, dbegin, dend, ap.size, ap.ects, ap.mail
ORDER BY ap.year, ap.semester, ap.dbegin, ap.dend, ap.code;

CREATE OR REPLACE VIEW vsubscription AS
SELECT ap.*, TO_CHAR(su.subdate,'DD/MM/YYYY') AS subdate, su.utclogin AS sublogin, lo.*
FROM subscribe su
JOIN vapi ap ON ap.code=su.api
LEFT JOIN vlocaluser lo ON su.utclogin=lo.utclogin
ORDER BY ap.year, ap.semester, ap.dbegin, ap.dend, ap.code, lo.firstname, lo.surname, su.utclogin;

COMMIT;