OS-314 fixes because I've broken full git struct

2026-01-29 04:46:45 +07:00
parent 1012c43304
commit 97d55ac267
3 changed files with 226 additions and 0 deletions
@@ -0,0 +1,111 @@
+-- Измерение пользователей
+	CREATE TABLE core.dim_user (
+	    user_id INT PRIMARY KEY,
+	    name TEXT,
+	    age INT,
+	    email TEXT,
+	    registration_date DATE
+	)
+	distributed by (user_id);
+	
+	-- Измерение курсов
+	CREATE TABLE core.dim_course (
+	    course_id INT PRIMARY KEY,
+	    title TEXT,
+	    category TEXT
+	)
+	distributed by (course_id);
+	
+	-- Измерение уроков
+	CREATE TABLE core.dim_lesson (
+	    lesson_id INT PRIMARY KEY,
+	    title TEXT,
+	    duration_min INT,
+	    course_id INT REFERENCES core.dim_course(course_id)
+	)
+	distributed by (lesson_id);
+	
+	-- Опционально: измерение времени
+	CREATE TABLE core.dim_date (
+	    date DATE PRIMARY KEY,
+	    year INT,
+	    month INT,
+	    day INT,
+	    weekday TEXT
+	)
+	distributed replicated;
+	
+	-- Таблицы фактов:
+	CREATE TABLE core.fact_lesson_views (
+	    user_id INT REFERENCES core.dim_user(user_id),
+	    lesson_id INT REFERENCES core.dim_lesson(lesson_id),
+	    course_id INT REFERENCES core.dim_course(course_id),
+	    viewed_at TIMESTAMP
+	)
+	distributed by (course_id);
+	
+	CREATE TABLE core.enrollments (
+	    user_id INT REFERENCES core.dim_user(user_id),
+	    course_id INT REFERENCES core.dim_course(course_id),
+	    enrolled_at TIMESTAMP
+	)
+	distributed by (course_id);
+	
+	--ETL переброс данных из raw в core
+	INSERT INTO core.dim_user (user_id, name, age, email, registration_date)
+	SELECT DISTINCT
+	    id::INT,
+	    name::TEXT,
+	    age::INT,
+	    email::TEXT,
+	    registration_date::DATE
+	FROM raw.users;
+	
+	INSERT INTO core.dim_course (course_id, title, category)
+	SELECT DISTINCT
+	    id::INT,
+	    title::TEXT,
+	    category::TEXT
+	FROM raw.courses;
+	
+	INSERT INTO core.dim_lesson (lesson_id, title, duration_min, course_id)
+	SELECT DISTINCT
+	    id::INT,
+	    title::TEXT,
+	    duration_min::INT,
+	    course_id::INT
+	FROM raw.lessons;
+	
+	INSERT INTO core.dim_lesson (lesson_id, title, duration_min, course_id)
+	SELECT DISTINCT
+	    id::INT,
+	    title::TEXT,
+	    duration_min::INT,
+	    course_id::INT
+	FROM raw.lessons;
+	
+	-- Заполнение таблицы фактов
+	insert into core.fact_lesson_views (user_id, lesson_id, course_id, viewed_at)
+	select
+		lw.user_id,
+		lw.lesson_id,
+		l.course_id,
+		lw.viewed_at
+	from raw.lessons_views lw
+	join raw.lessons l on lw.lesson_id = l.id;
+	
+	insert into core.enrollments (user_id, lesson_id, course_id, viewed_at)
+	select
+		lw.user_id,
+		lw.lesson_id,
+		l.course_id,
+		lw.viewed_at
+	from raw.lessons_views lw
+	join raw.lessons l on lw.lesson_id = l.id;
+	
+	insert into enrollments (user_id, course_id, enrolled_at)
+	select
+		user_id,
+		course_id,
+		enrolled_at
+	from raw.enrollments;