Этап 3. Слой Core — обогащённые данные. Пет проект: DWH. РАБОТА НАД ОШИБКАМИ - сделали типы столбцов в core такими же как в raw.

mnoskov/greenplum/Пет проект: DWH/Step_3_core_layer.sql

@@ -1,27 +1,27 @@
 -- 4
-
 --DROP TABLE IF EXISTS core.dim_user;
 CREATE TABLE core.dim_user (
-	user_id int PRIMARY KEY,
+	user_id bigint PRIMARY KEY,
-	name text,
+	name varchar(100),
-	age int,
+	age smallint,
-	email text NOT NULL,
+	email varchar(100) NOT NULL,
-	registration_date date NOT NULL
+	registration_date timestamptz NOT NULL
 ) DISTRIBUTED BY (user_id);
 
 --DROP TABLE IF EXISTS core.dim_course;
 CREATE TABLE core.dim_course (
-	course_id int PRIMARY KEY,
+	course_id bigint PRIMARY KEY,
-	title text NOT NULL,
+	title varchar(150) NOT NULL,
-	category text
+	category varchar(50),
+	created_at timestamptz NOT NULL
 ) DISTRIBUTED BY (course_id);
 
 --DROP TABLE IF EXISTS core.dim_lesson;
 CREATE TABLE core.dim_lesson (
-	lesson_id int PRIMARY KEY,
+	lesson_id bigint PRIMARY KEY,
-	title text NOT NULL,
+	title varchar(150) NOT NULL,
-	duration_min int,
+	duration_min smallint,
-	course_id int NOT NULL REFERENCES core.dim_course(course_id)
+	course_id bigint NOT NULL REFERENCES core.dim_course(course_id)
 ) DISTRIBUTED BY (lesson_id);
 
 --DROP TABLE IF EXISTS core.dim_date;
@@ -37,17 +37,17 @@ CREATE TABLE core.dim_date (
 -- 5
 --DROP TABLE IF EXISTS core.fact_lesson_views;
 CREATE TABLE core.fact_lesson_views (
-	user_id int NOT NULL REFERENCES core.dim_user(user_id),
+	user_id bigint NOT NULL REFERENCES core.dim_user(user_id),
-	lesson_id int NOT NULL REFERENCES core.dim_lesson(lesson_id),
+	lesson_id bigint NOT NULL REFERENCES core.dim_lesson(lesson_id),
-	course_id int NOT NULL REFERENCES core.dim_course(course_id),
+	course_id bigint NOT NULL REFERENCES core.dim_course(course_id),
-	viewed_at timestamp NOT NULL
+	viewed_at timestamptz NOT NULL
 ) DISTRIBUTED BY (user_id);
 
 --DROP TABLE IF EXISTS core.enrollments;
 CREATE TABLE core.enrollments (
-	user_id int NOT NULL REFERENCES core.dim_user(user_id),
+	user_id bigint NOT NULL REFERENCES core.dim_user(user_id),
-	course_id int NOT NULL REFERENCES core.dim_course(course_id),
+	course_id bigint NOT NULL REFERENCES core.dim_course(course_id),
-	enrolled_at timestamp NOT NULL
+	enrolled_at timestamptz NOT NULL
 ) DISTRIBUTED BY (user_id);