267 lines
6.9 KiB
PL/PgSQL
267 lines
6.9 KiB
PL/PgSQL
drop schema bank cascade;
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create schema bank;
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/*
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* Holder : table commune à tous les titulaires
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*/
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create table holder (
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"id" bigint primary key generated always as identity, -- identifiant unique
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"type" text not null check ("type" in ('PERSON', 'COMPANY')),
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"created_at" timestamp not null default now() -- date de création
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);
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/*
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* Person
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*/
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create table person (
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"id" bigint primary key references holder(id) on delete cascade,
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"firstname" text not null,
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"lastname" text not null,
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"birthdate" date not null
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);
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/*
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* Company
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*/
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create table company (
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"id" bigint primary key references holder(id) on delete cascade,
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"name" text not null,
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"registration_number" text unique not null,
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"created_at" date not null
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);
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/*
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* Insertion des données
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*/
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-- Création d’un titulaire de type personne physique
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insert into holder(type) values ('PERSON') returning id;
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-- Utilisons l'id qui est retourné (1)
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insert into person(id, firstname, lastname, birthdate)
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values (1, 'Françoise', 'Zanetti', '1995-04-12');
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-- Création d’un titulaire de type entreprise
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insert into holder(type) values ('COMPANY') returning id;
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-- Utilisons l'id qui est retourné (2)
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insert into company(id, name, registration_number, created_at)
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values (2, 'Boulangerie de Valorgue', 'FR19803269968', '2014-08-19');
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/*
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* Visualisation des données
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*/
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-- Liste de tous les titulaires
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create view holders_list as
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select h.id, h.type, h.created_at,
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p.firstname || ' ' || p.lastname as person,
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c.name as company
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from holder h
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left join person p on p.id = h.id
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left join company c on c.id = h.id
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order by h.id;
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/*
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* Suppression des données
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*/
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insert into holder(type) values ('PERSON') returning id;
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insert into person(id, firstname, lastname, birthdate)
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values (3, 'Lucas', 'Zanetti', '2002-05-09');
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select * from person;
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delete from holder where id = 3;
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-- La suppresion du titulaire entraine la suppression de l'individu
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select * from person;
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-- Contrainte sur l'âge du titulaire
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alter table person
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add constraint chk_person_minimum_age
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check (birthdate <= current_date - interval '15 years');
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insert into holder(type) values ('PERSON') returning id;
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insert into person(id, firstname, lastname, birthdate)
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values (4, 'Mattéo', 'Zanetti', '2012-12-12');
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/*
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* Account
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* Chaque compte a un numéro unique.
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* La contrainte check (balance >= 0) empêche les soldes négatifs
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*/
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create table account (
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id bigint primary key generated always as identity,
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number text unique not null,
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opened_at date not null default current_date,
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closed_at date,
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balance numeric(18,6) not null default 0 check (balance >= 0)
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);
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/*
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* Account -> Holder
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* Cette table établit la relation n–n entre account et holder.
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* Un compte joint correspond donc à plusieurs lignes dans cette table.
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* La contrainte share assure que les parts sont comprises entre 0 et 1.
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*/
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create table account_holder (
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account_id int not null references account(id) on delete cascade,
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holder_id int not null references holder(id) on delete cascade,
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share numeric(4,3) default 1 check (share > 0 and share <= 1),
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primary key (account_id, holder_id)
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);
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/*
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* Compte individuel pour Françoise Zanetti.
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*/
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insert into account (number)
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values ('AA') returning id;
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insert into account_holder
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values (1, 1);
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/*
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* Ajout d'un nouveau titulaire : Justin Hébrard né le 11/03/1993.
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*/
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insert into holder(type) values ('PERSON') returning id;
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insert into person(id, firstname, lastname, birthdate)
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values (5, 'Justin', 'Hébrard', '1993-03-11');
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/*
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* Compte joint pour Françoise et Justin.
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*/
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insert into account (number)
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values ('AB') returning id;
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insert into account_holder
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values (2, 1, 0.5);
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insert into account_holder
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values (2, 5, 0.5);
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create view accounts_list as
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select
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a.number,
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h.type,
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coalesce(p.firstname || ' ' || p.lastname, c.name) as holder_name,
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ah.share,
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a.balance
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from account a
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join account_holder ah on ah.account_id = a.id
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join holder h on h.id = ah.holder_id
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left join person p on p.id = h.id
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left join company c on c.id = h.id
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order by a.id, h.id;
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/*
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* Une transaction
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* L'enregistrement réel de toutes les entités s'effectue au commit
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*/
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begin;
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insert into holder(type) values ('PERSON') returning id;
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insert into person(id, firstname, lastname, birthdate)
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values (6, 'Justin', 'Hébrard', '1993-03-11');
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commit;
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create or replace procedure create_person_holder(
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p_firstname text,
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p_lastname text,
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p_birthdate date
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)
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language plpgsql
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as $$
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declare
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v_holder_id bigint;
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begin
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-- Vérification métier
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if p_birthdate > current_date - interval '15 years' then
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raise exception 'Le titulaire doit avoir au moins 15 ans (%).', p_birthdate
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using errcode = 'P0001';
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end if;
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-- Création atomique du titulaire
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insert into holder(type)
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values ('PERSON')
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returning id into v_holder_id;
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insert into person(id, firstname, lastname, birthdate)
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values (v_holder_id, p_firstname, p_lastname, p_birthdate);
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raise notice 'Titulaire créé avec succès : %, % % (ID=%)',
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p_firstname, p_lastname, to_char(p_birthdate, 'YYYY-MM-DD'), v_holder_id;
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end;
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$$;
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call create_person_holder('Mattéo', 'Zanetti', '2012-12-12');
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call create_person_holder('Clotilde', 'Hébrard', '1989-07-14');
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select account_id, sum(share) as total_share
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from account_holder
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group by account_id;
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create or replace procedure create_account(
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p_iban text,
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p_name text,
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p_holders int[],
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p_shares numeric[]
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)
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language plpgsql
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as $$
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declare
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v_account_id int;
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v_sum numeric(6,4) := 0;
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v_count int;
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begin
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-- Vérification des tailles
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if array_length(p_holders, 1) is null or array_length(p_shares, 1) is null then
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raise exception 'Les tableaux de titulaires et de parts ne peuvent pas être vides.';
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end if;
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if array_length(p_holders, 1) <> array_length(p_shares, 1) then
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raise exception 'Les tableaux de titulaires et de parts doivent avoir la même taille.';
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end if;
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-- Calcul de la somme des parts
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for i in 1..array_length(p_shares, 1) loop
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v_sum := v_sum + p_shares[i];
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end loop;
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if abs(v_sum - 1.0) > 0.0001 then
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raise exception 'La somme des parts (%.4f) doit être égale à 1.0000', v_sum;
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end if;
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-- Vérification des titulaires
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select count(*) into v_count from holder where id = any(p_holders);
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if v_count <> array_length(p_holders, 1) then
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raise exception 'Un ou plusieurs titulaires n''existent pas.';
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end if;
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-- Création du compte
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insert into account(iban, name)
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values (p_iban, p_name)
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returning id into v_account_id;
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-- Association des titulaires
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for i in 1..array_length(p_holders, 1) loop
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insert into account_holder(account_id, holder_id, share)
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values (v_account_id, p_holders[i], p_shares[i]);
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end loop;
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raise notice 'Compte créé avec succès (ID=%) avec % titulaires.',
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v_account_id, array_length(p_holders, 1);
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end;
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$$;
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