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Homework 10 #1123

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d123937
Homework 10
Jan 26, 2025
97a192c
Homework 10 2.0
Jan 26, 2025
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1 change: 1 addition & 0 deletions .gitignore
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Expand Up @@ -3,3 +3,4 @@
.DS_Store
.AppleDouble
.LSOverride
.env
120 changes: 120 additions & 0 deletions code/data_10000.sql
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Create or replace function random_string(length integer) returns text as
$$
declare
chars text[] := '{0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z}';
result text := '';
i integer := 0;
begin
if length < 0 then
raise exception 'Given length cannot be less than 0';
end if;
for i in 1..length
loop
result := result || chars[1 + random() * (array_length(chars, 1) - 1)];
end loop;
return result;
end;
$$ language plpgsql;

-- Наполнение таблицы clients (Клиенты)
insert into clients (id, surname, name, email, phone, age)
select gs.id,
concat('surname-', random_string(((random() * (15 - 3 + 1)) + 3)::integer)),
concat('name-', random_string(((random() * (8 - 3 + 1)) + 3)::integer)),
concat('email', ((random() * (1000 - 100 + 1))::integer + 100), '@',
(case (floor(random() * 2))
when 0 then 'mail'
when 1 then 'yandex'
when 2 then 'rambler'
end), '.ru'),
concat('+79', substr((random() * 10000000000)::varchar, 1, 9)),
((random() * (85 - 16 + 1)) + 16)::integer
from generate_series(1, 1500) as gs(id);

-- Наполнение таблицы genres (Жанры)
insert into genres (id, name)
values (1, 'Ужасы'),
(2, 'Боевик'),
(3, 'Мелодрама'),
(4, 'Драма'),
(5, 'Комедия');

-- Наполнение таблицы movies (Фильмы)
insert into movies(id, genre_id, name, description, duration, age_limit, rating)
select gs.id,
(floor(random() * 5 + 1)),
concat('movie-', random_string(((random() * (8 - 3 + 1)) + 3)::integer)),
concat('description-', random_string(((random() * (50 - 10 + 1)) + 10)::integer)),
((random() * (120 - 60 + 1)) + 60)::integer,
((random() * (21 - 6 + 1)) + 6)::integer,
CAST((random() * 4 + 1) AS decimal(2, 1))
from generate_series(1, 10000) as gs(id);

-- Наполнение таблицы halls (Кинозалы)
insert into halls(id, name, seat_count)
select gs.id,
concat('Зал_', random_string(5)),
160
from generate_series(1, 5) as gs(id);

-- Наполнение таблицы seats (Места кинозала)
-- В каждом зале 8 рядов по 20 мест, в сумме 160 мест
do
$$
begin
for hall in 1..5
loop
for row in 1..8
loop
insert into seats(hall_id, number, row)
select hall,
number,
row
from generate_series(1, 20) as number;
end loop;
end loop;
end;
$$ language plpgsql;

-- Наполнение таблицы sessions (Сеансы)
-- В каждом зале 7 показов фильмов в день на протяжении 1 месяца
do
$$
declare
start_time timestamp;
begin
for day in 1..31
loop
for hall in 1..5
loop
start_time = now()::date - (31 - day || ' days')::interval;
insert into sessions(hall_id, movie_id, started_at, ended_at)
select hall,
((random() * (10000 - 1) + 1))::integer,
start_time + (1 || ' days')::interval,
start_time + (1 || ' days')::interval + concat((60 + random() * 180)::integer, ' minutes')::interval
from generate_series(1, 7) as gs(id);
end loop;
end loop;
end;
$$ language plpgsql;

-- Наполнение таблицы prices (Цены)
insert into prices(session_id, seat_id, price)
select sessions.id as session_id,
seats.id as seat_id,
CAST((random() * (500 - 250) + 1) AS decimal(5, 2))
from sessions
left join halls on sessions.hall_id = halls.id
right join seats on seats.hall_id = halls.id;

-- Наполнение таблицы tickets (Билеты)
insert into tickets (client_id, price_id, price, sale_at)
select ((random() * (1500 - 1) + 1))::integer as client_id,
prices.id as price_id,
prices.price,
(sessions.started_at + random() * (sessions.ended_at - sessions.started_at)) as sale_at
from prices
join public.sessions on sessions.id = prices.session_id
order by random()
limit 10000;
120 changes: 120 additions & 0 deletions code/data_10_million.sql
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Create or replace function random_string(length integer) returns text as
$$
declare
chars text[] := '{0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z}';
result text := '';
i integer := 0;
begin
if length < 0 then
raise exception 'Given length cannot be less than 0';
end if;
for i in 1..length
loop
result := result || chars[1 + random() * (array_length(chars, 1) - 1)];
end loop;
return result;
end;
$$ language plpgsql;

-- Наполнение таблицы clients (Клиенты)
insert into clients (id, surname, name, email, phone, age)
select gs.id,
concat('surname-', random_string(((random() * (15 - 3 + 1)) + 3)::integer)),
concat('name-', random_string(((random() * (8 - 3 + 1)) + 3)::integer)),
concat('email', ((random() * (1000 - 100 + 1))::integer + 100), '@',
(case (floor(random() * 2))
when 0 then 'mail'
when 1 then 'yandex'
when 2 then 'rambler'
end), '.ru'),
concat('+79', substr((random() * 10000000000)::varchar, 1, 9)),
((random() * (85 - 16 + 1)) + 16)::integer
from generate_series(1, 1500) as gs(id);

-- Наполнение таблицы genres (Жанры)
insert into genres (id, name)
values (1, 'Ужасы'),
(2, 'Боевик'),
(3, 'Мелодрама'),
(4, 'Драма'),
(5, 'Комедия');

-- Наполнение таблицы movies (Фильмы)
insert into movies(id, genre_id, name, description, duration, age_limit, rating)
select gs.id,
(floor(random() * 5 + 1)),
concat('movie-', random_string(((random() * (8 - 3 + 1)) + 3)::integer)),
concat('description-', random_string(((random() * (50 - 10 + 1)) + 10)::integer)),
((random() * (120 - 60 + 1)) + 60)::integer,
((random() * (21 - 6 + 1)) + 6)::integer,
CAST((random() * 4 + 1) AS decimal(2, 1))
from generate_series(1, 1000000) as gs(id);

-- Наполнение таблицы halls (Кинозалы)
insert into halls(id, name, seat_count)
select gs.id,
concat('Зал_', random_string(5)),
160
from generate_series(1, 5) as gs(id);

-- Наполнение таблицы seats (Места кинозала)
-- В каждом зале 8 рядов по 20 мест, в сумме 160 мест
do
$$
begin
for hall in 1..5
loop
for row in 1..8
loop
insert into seats(hall_id, number, row)
select hall,
number,
row
from generate_series(1, 20) as number;
end loop;
end loop;
end;
$$ language plpgsql;

-- Наполнение таблицы sessions (Сеансы)
-- В каждом зале 7 показов фильмов в день на протяжении 1095 дней
do
$$
declare
start_time timestamp;
begin
for day in 1..1825
loop
for hall in 1..5
loop
start_time = now()::date - (1825 - day || ' days')::interval;
insert into sessions(hall_id, movie_id, started_at, ended_at)
select hall,
((random() * (10000 - 1) + 1))::integer,
start_time + (1 || ' days')::interval,
start_time + (1 || ' days')::interval + concat((60 + random() * 180)::integer, ' minutes')::interval
from generate_series(1, 7) as gs(id);
end loop;
end loop;
end;
$$ language plpgsql;

-- Наполнение таблицы prices (Цены)
insert into prices(session_id, seat_id, price)
select sessions.id as session_id,
seats.id as seat_id,
CAST((random() * (500 - 250) + 1) AS decimal(5, 2))
from sessions
left join halls on sessions.hall_id = halls.id
right join seats on seats.hall_id = halls.id;

-- Наполнение таблицы tickets (Билеты)
insert into tickets (client_id, price_id, price, sale_at)
select ((random() * (1500 - 1) + 1))::integer as client_id,
prices.id as price_id,
prices.price,
(sessions.started_at + random() * (sessions.ended_at - sessions.started_at)) as sale_at
from prices
join public.sessions on sessions.id = prices.session_id
order by random()
limit 10000000;
104 changes: 104 additions & 0 deletions code/ddl.sql
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-- Проверка существует ли таблица halls и её удаление
DROP TABLE IF EXISTS public.halls CASCADE;
-- Создание таблицы halls (Кинозалы)
CREATE TABLE public.halls
(
"id" BIGSERIAL NOT NULL PRIMARY KEY,
"name" VARCHAR(100) NOT NULL,
"seat_count" INT NOT NULL
);

-- Проверка существует ли таблица seats и её удаление
DROP TABLE IF EXISTS public.seats CASCADE;
-- Создание таблицы seats (Места в кинозале) + связь с таблицей (halls)
CREATE TABLE public.seats
(
"id" BIGSERIAL NOT NULL primary key,
"hall_id" BIGINT NOT NULL,
"number" INT NOT NULL,
"row" INT NOT NULL,

CONSTRAINT public_seats_hall_id_foreign FOREIGN KEY (hall_id) REFERENCES halls (id) ON DELETE CASCADE ON UPDATE CASCADE
);

-- Проверка существует ли таблица genres и её удаление
DROP TABLE IF EXISTS public.genres CASCADE;
-- Создание таблицы genres (Жанры фильмов)
CREATE TABLE public.genres
(
"id" BIGSERIAL NOT NULL primary key,
"name" VARCHAR(100) NOT NULL
);

-- Проверка существует ли таблица movies и её удаление
DROP TABLE IF EXISTS public.movies CASCADE;
-- Создание таблицы movies (Фильмы) + связь с таблицей genres
CREATE TABLE public.movies
(
"id" BIGSERIAL NOT NULL primary key,
"genre_id" BIGINT NOT NULL,
"name" VARCHAR(100) NOT NULL,
"description" VARCHAR(255) NOT NULL,
"duration" INT NOT NULL,
"age_limit" INT NOT NULL,
"rating" decimal(2, 1) NOT NULL,

CONSTRAINT public_movies_genre_id_foreign FOREIGN KEY (genre_id) REFERENCES genres (id) ON DELETE CASCADE ON UPDATE CASCADE
);

-- Проверка существует ли таблица sessions и её удаление
DROP TABLE IF EXISTS public.sessions CASCADE;
-- Создание таблицы sessions (Сеансы) + связь с таблицами (halls, movies)
CREATE TABLE public.sessions
(
"id" BIGSERIAL NOT NULL primary key,
"hall_id" BIGINT NOT NULL,
"movie_id" BIGINT NOT NULL,
"started_at" TIMESTAMP NOT NULL,
"ended_at" TIMESTAMP NOT NULL,

CONSTRAINT public_sessions_hall_id_foreign FOREIGN KEY (hall_id) REFERENCES halls (id) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT public_sessions_movie_id_foreign FOREIGN KEY (movie_id) REFERENCES movies (id) ON DELETE CASCADE ON UPDATE CASCADE
);

-- Проверка существует ли таблица clients и её удаление
DROP TABLE IF EXISTS public.clients CASCADE;
-- Создание таблицы clients (Клиенты)
CREATE TABLE public.clients
(
"id" BIGSERIAL NOT NULL primary key,
"surname" VARCHAR(255) NOT NULL,
"name" VARCHAR(255) NOT NULL,
"email" VARCHAR(255) NOT NULL,
"phone" VARCHAR(50) NOT NULL,
"age" INT NOT NULL
);

-- Проверка существует ли таблица prices и её удаление
DROP TABLE IF EXISTS public.prices CASCADE;
-- Создание таблицы prices (Цены) + связь с таблицами (sessions, seats)
CREATE TABLE public.prices
(
"id" BIGSERIAL NOT NULL primary key,
"session_id" BIGINT NOT NULL,
"seat_id" BIGINT NOT NULL,
"price" DECIMAL(5, 2) NOT NULL,

CONSTRAINT public_prices_session_id_foreign FOREIGN KEY (session_id) REFERENCES sessions (id) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT public_prices_seat_id_foreign FOREIGN KEY (seat_id) REFERENCES seats (id) ON DELETE CASCADE ON UPDATE CASCADE
);

-- Проверка существует ли таблица tickets и её удаление
DROP TABLE IF EXISTS public.tickets CASCADE;
-- Создание таблицы tickets (Билеты) + связь с таблицами (clients, prices)
CREATE TABLE public.tickets
(
"id" BIGSERIAL NOT NULL primary key,
"client_id" BIGINT NOT NULL,
"price_id" BIGINT NOT NULL,
"price" DECIMAL(5, 2) NOT NULL,
"sale_at" TIMESTAMP NOT NULL,

CONSTRAINT public_tickets_client_id_foreign FOREIGN KEY (client_id) REFERENCES clients (id) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT public_tickets_price_id_foreign FOREIGN KEY (price_id) REFERENCES prices (id) ON DELETE CASCADE ON UPDATE CASCADE
);
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