A fominichev/hw9

DDL.sql

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+CREATE TABLE "films" (
+  "id" integer PRIMARY KEY,
+  "title" text
+);
+
+CREATE TABLE "attribute_types" (
+  "id" integer PRIMARY KEY,
+  "name" text,
+  "data_type" text
+);
+
+CREATE TABLE "attributes" (
+  "id" integer PRIMARY KEY,
+  "name" text,
+  "type_id" integer REFERENCES "attribute_types" ("id")
+);
+
+CREATE TABLE "attribute_values" (
+  "id" integer PRIMARY KEY,
+  "film_id" integer REFERENCES "films" ("id"),
+  "attribute_id" integer REFERENCES "attributes" ("id"),
+  "value_text" text,
+  "value_date" date,
+  "value_boolean" boolean,
+  "value_integer" integer,
+  "value_numeric" numeric(16, 4)
+);
+
+CREATE INDEX attribute_values_film_id ON attribute_values (film_id);
+CREATE INDEX attribute_values_attribute_id ON attribute_values (attribute_id);
+CREATE INDEX attributes_type_id ON attributes (type_id);

Data_sample.sql

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+INSERT INTO films
+VALUES (1, 'Белое солнце пустыни'),
+       (2, 'Терминатор 2'),
+       (3, 'Чужие');
+
+
+INSERT INTO attribute_types
+VALUES (1, 'Отзывы', 'text'),
+       (2, 'Премии', 'boolean'),
+       (3, 'Важные даты', 'date'),
+       (4, 'Служебные даты', 'date');
+
+
+INSERT INTO attributes
+VALUES (1, 'Отзыв критика Х', 1),
+       (2, 'Отзыв критика Y', 1),
+       (3, 'Оскар', 2),
+       (4, 'Ника', 2),
+       (5, 'Мировая премьера', 3),
+       (6, 'Премьера в РФ ', 3),
+       (7, 'Старт продаж билетов', 4),
+       (8, 'Старт рекламы на ТВ', 4);
+
+
+INSERT INTO attribute_values
+VALUES (1, 1, 2, 'Отличный фильм', NULL, NULL, NULL),
+       (2, 1, 4, '', NULL, TRUE, NULL),
+       (3, 1, 6, '', '2023-06-03', NULL, NULL),
+       (4, 1, 7, '', '2023-06-23', NULL, NULL),
+       (5, 2, 1, 'Веха в истории кино', NULL, NULL, NULL),
+       (6, 2, 3, '', NULL, TRUE, NULL),
+       (7, 2, 5, '', '2023-06-23', NULL, NULL),
+       (8, 2, 8, '', '2023-06-03', NULL, NULL),
+       (9, 1, 8, '', '2023-06-23', NULL, NULL),
+       (10, 1, 3, '', NULL, TRUE, NULL);

README.md

@@ -1 +1,9 @@
-# PHP_2022
+PHP Developer. Professional
+
+# EAV модель
+
+Спроектировать EAV-хранение для базы данных кинотеатра
+Логическая модель
+DDL скрипты
+View для служебных данных
+View для данных для маркетинга 

View_market_data.sql

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+CREATE VIEW market_data AS
+SELECT films.title,
+       attribute_types.name AS attribute_type,
+       attributes.name,
+       (CASE
+            WHEN attribute_types.data_type = 'text' THEN attribute_values.value_text::text
+            WHEN attribute_types.data_type = 'date' THEN attribute_values.value_date::text
+            WHEN attribute_types.data_type = 'boolean' THEN attribute_values.value_boolean::text
+            WHEN attribute_types.data_type = 'integer' THEN attribute_values.value_integer::text
+        END) AS value
+FROM films
+LEFT JOIN attribute_values ON attribute_values.film_id = films.id
+LEFT JOIN attributes ON attributes.id = attribute_values.attribute_id
+LEFT JOIN attribute_types ON attribute_types.id = attributes.type_id
+WHERE attribute_types.id in (2,3)
+ORDER BY films.id, attribute_types.id;
+
+SELECT *
+FROM market_data;

View_work_dates.sql

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+CREATE VIEW work_dates AS 
+WITH work_dates_today AS
+  (SELECT films.id,
+          films.title,
+          array_agg(CONCAT (attributes.name, ' - ', attribute_values.value_date)) AS works
+   FROM films
+   LEFT JOIN attribute_values ON attribute_values.film_id = films.id
+   LEFT JOIN attributes ON attributes.id = attribute_values.attribute_id
+   LEFT JOIN attribute_types ON attribute_types.id = attributes.type_id
+   WHERE attribute_types.id = 4
+     AND attribute_values.value_date = CURRENT_DATE
+   GROUP BY films.id),
+work_dates_after20days AS
+  (SELECT films.id,
+          films.title,
+          array_agg(CONCAT (attributes.name, ' - ', attribute_values.value_date)) AS works
+   FROM films
+   LEFT JOIN attribute_values ON attribute_values.film_id = films.id
+   LEFT JOIN attributes ON attributes.id = attribute_values.attribute_id
+   LEFT JOIN attribute_types ON attribute_types.id = attributes.type_id
+   WHERE attribute_types.id = 4
+     AND attribute_values.value_date = CURRENT_DATE + 20
+   GROUP BY films.id)
+SELECT coalesce(work_dates_today.title, work_dates_after20days.title) as title,
+       work_dates_today.works AS today,
+       work_dates_after20days.works AS after_20
+FROM work_dates_today
+FULL JOIN work_dates_after20days ON work_dates_today.id = work_dates_after20days.id;
+
+SELECT *
+FROM work_dates;