opensap: Big Data with SAP HANA Vora Course Week 03 - Exercises

opensap: Big Data with SAP HANA Vora Course Week 03 - Exercises

opensap TABLE OF CONTENTS 1 TABLES AND VIEWS... 3 Create tables... 4 Select from the table... 4 Listing tables and views... 4 Loading tables from Vora into Spark... 5 Appending tables... 5 Dropping tables... 5 Creating views... 5 SQL VIEW... 5 Dimension View... 6 Cube view... 6 Drop views... 7 Check how the view is created... 7 2 DIFFERENT DATA TYPES... 9 Parquet Files... 10 Creating a table in Vora loading data from parquet format... 10 Check the result... 10 ORC Files... 11 Check the result... 11 3 HIERARCHIES... 12 Create Hierarchies... 13 Check the table... 13 Joining Hierarchies with regular tables... 13 Create the ADDRESSES table and check the values... 13 Create a view of Hierarchy which will make it easier to play with later:... 14 Join the ADDRESSES and OFFICERS tables... 15 Running UDF s on the Hierarchies... 15 Returns the rank of the descendants of the root... 15 Returns the address and the rank for the officers from level 2... 16 2

1 TABLES AND VIEWS Start Zeppelin: - Click on the connect button next to your opensap instance on CAL - A window will pop up. Click on Open next to Zeppelin to connect to Vora Data Modeler for the purpose of this exercise. - Zeppelin opens up in your browser. As you can see you ll have access to the solutions of the exercises and the create table statements via zeppelin notebooks: - You can use the solutions as a guide while running the exercises or creating a new notebook by clicking on Create new note and write your own solution. - In order to run a command on your Zeppelin notebook, click on the play button as below: 3

Create tables %vora CREATE TABLE CUSTOMER (CUSTOMER_ID string, REGION string, LONGITUDE int, LATITUDE int, CUSTOMER_GROUP string, LOCATION string) USING com.sap.spark.vora OPTIONS (tablename "CUSTOMER", paths "/user/vora/customer_data.csv") Select from the table %vora SELECT * FROM CUSTOMER Listing tables and views %vora SHOW TABLES using com.sap.spark.vora ** The result may look differently on your system 4

Loading tables from Vora into Spark %vora REGISTER TABLE SALES USING com.sap.spark.vora IGNORING CONFLICTS or %vora REGISTER ALL TABLES USING com.sap.spark.vora IGNORING CONFLICTS Appending tables %vora APPEND TABLE SALES OPTIONS (paths "/user/vora/sales_2015_data.csv,/user/vora/sales_data.csv", eagerload "true") ** Now you can see the sales from 2015 data is also added Sales from 2013 and 2014 Dropping tables %vora DROP TABLE CUSTOMER Creating views SQL VIEW %vora CREATE VIEW SALES_2014 AS (SELECT * FROM SALES WHERE YEAR = 2014) USING com.sap.spark.vora %vora SELECT * FROM SALES_2014 5

Dimension View Creating a CUSTOMER Dimension from the SALES data: %vora CREATE DIMENSION VIEW CUSTOMERDIM AS SELECT CUSTOMER_ID, YEAR FROM SALES USING com.sap.spark.vora %vora SELECT * FROM CUSTOMERDIM Cube view Jouining the Customer dimension with the sales table to create a sales cube (To show how you could join different tables and dimensions to create a cube) %vora CREATE CUBE VIEW SALESCUBE AS (SELECT * FROM CUSTOMERDIM C JOIN SALES S ON C.CUSTOMER_ID = S.CUSTOMER_ID) USING com.sap.spark.vora 6

Drop views %vora DROP VIEW SALESCUBE using com.sap.spark.vora Checking the initial SQL statement used to create the view %vora DROP VIEW SALESCUBE using com.sap.spark.vora Check how the view is created %vora DESCRIBE TABLE SALES_2014 USING com.sap.spark.vora 7

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2 DIFFERENT DATA TYPES Start Zeppelin: - Click on the connect button next to your opensap instance on CAL - A window will pop up. Click on Open next to Zeppelin to connect to Vora Data Modeler for the purpose of this exercise. - Zeppelin opens up in your browser. As you can see you ll have access to the solutions of the exercises and the create table statements via zeppelin notebooks: - You can use the solutions as a guide while running the exercises or creating a new notebook by clicking on Create new note and write your own solution. - In order to run a command on your Zeppelin notebook, click on the play button as below: 9

Follow the first steps in exercise 2 to open Zeppelin and run the following exercises. Parquet Files Creating a table in Vora loading data from parquet format %vora CREATE TABLE SALES_P(CUSTOMER_ID string, YEAR string, REVENUE bigint) USING com.sap.spark.vora OPTIONS(tablename "SALES_P", paths "/user/vora/sales_p.parquet/*",format "parquet ) Check the result %vora SELECT * FROM SALES_P 10

ORC Files %vora CREATE TABLE SALES_O(CUSTOMER_ID string, YEAR string, REVENUE bigint) USING com.sap.spark.vora OPTIONS (tablename "SALES_O",paths "/user/vora/sales_o.orc/*",format "orc") Check the result %vora SELECT * FROM SALES_0 11

3 HIERARCHIES Start Zeppelin: - Click on the connect button next to your opensap instance on CAL - A window will pop up. Click on Open next to Zeppelin to connect to Vora Data Modeler for the purpose of this exercise. - Zeppelin opens up in your browser. As you can see you ll have access to the solutions of the exercises and the create table statements via zeppelin notebooks: - You can use the solutions as a guide while running the exercises or creating a new notebook by clicking on Create new note and write your own solution. - In order to run a command on your Zeppelin notebook, click on the play button as below: 12

Create Hierarchies %vora CREATE TABLE OFFICERS (id int, pred int, ord int, rank string) USING com.sap.spark.vora OPTIONS ( tablename "OFFICERS", paths "/user/vora/officers.csv ) Check the table %vora SELECT * FROM OFFICERS Joining Hierarchies with regular tables Create the ADDRESSES table and check the values %vora CREATE TABLE ADDRESSES (rank string, address string) USING com.sap.spark.vora OPTIONS (tablename "ADDRESSES", paths "/user/vora/addresses.csv") %vora SELECT * FROM ADDRESSES 13

Create a view of Hierarchy which will make it easier to play with later: %vora CREATE VIEW HV AS SELECT * FROM HIERARCHY ( USING OFFICERS AS child JOIN PARENT par ON child.pred = par.id SEARCH BY ord ASC START WHERE pred=0 SET node) AS H %vora SELECT * FROM HV 14

Join the ADDRESSES and OFFICERS tables %vora SELECT HV.rank, A.address FROM HV, ADDRESSES A WHERE HV.rank = A.rank Running UDF s on the Hierarchies Returns the rank of the descendants of the root %vora SELECT Children.rank FROM HV Children, HV Parents WHERE IS_ROOT(Parents.node) AND IS_PARENT(Parents.node, Children.node) 15

Returns the address and the rank for the officers from level 2 %vora SELECT OFFICERS.rank, ADDRESSES.address FROM (SELECT Descendants.rank AS rank FROM HV Parents, HV Descendants WHERE IS_DESCENDANT(Descendants.node, Parents.node) AND LEVEL(Parents.node) = 2 ) OFFICERS,ADDRESSES WHERE OFFICERS.rank = ADDRESSES.rank 16

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