SAP Data Services 4.x Cookbook

SAP Data Services 4.x Cookbook

Overview of this book

Want to cost effectively deliver trusted information to all of your crucial business functions? SAP Data Services delivers one enterprise-class solution for data integration, data quality, data profiling, and text data processing. It boosts productivity with a single solution for data quality and data integration. SAP Data Services also enables you to move, improve, govern, and unlock big data. This book will lead you through the SAP Data Services environment to efficiently develop ETL processes. To begin with, you’ll learn to install, configure, and prepare the ETL development environment. You will get familiarized with the concepts of developing ETL processes with SAP Data Services. Starting from smallest unit of work- the data flow, the chapters will lead you to the highest organizational unit—the Data Services job, revealing the advanced techniques of ETL design. You will learn to import XML files by creating and implementing real-time jobs. It will then guide you through the ETL development patterns that enable the most effective performance when extracting, transforming, and loading data. You will also find out how to create validation functions and transforms. Finally, the book will show you the benefits of data quality management with the help of another SAP solution—Information Steward.

SAP Data Services 4.x Cookbook

Credits

About the Author

About the Reviewers

www.PacktPub.com

Preface

Free Chapter

Introduction to ETL Development

Introduction

Preparing a database environment

Creating a source system database

Defining and creating staging area structures

Creating a target data warehouse

Configuring the Data Services Environment

Introduction

Creating IPS and Data Services repositories

Installing and configuring Information Platform Services

Installing and configuring Data Services

Configuring user access

Starting and stopping services

Administering tasks

Understanding the Designer tool

Data Services Basics – Data Types, Scripting Language, and Functions

Introduction

Creating variables and parameters

Creating a script

Using string functions

Using date functions

Using conversion functions

Using database functions

Using aggregate functions

Using math functions

Using miscellaneous functions

Creating custom functions

Dataflow – Extract, Transform, and Load

Introduction

Creating a source data object

Creating a target data object

Loading data into a flat file

Loading data from a flat file

Loading data from table to table – lookups and joins

Using the Map_Operation transform

Using the Table_Comparison transform

Exploring the Auto correct load option

Splitting the flow of data with the Case transform

Monitoring and analyzing dataflow execution

Workflow – Controlling Execution Order

Introduction

Creating a workflow object

Nesting workflows to control the execution order

Using conditional and while loop objects to control the execution order

Using the bypassing feature

Controlling failures – try-catch objects

Use case example – populating dimension tables

Job – Building the ETL Architecture

Introduction

Projects and jobs – organizing ETL

Using object replication

Migrating ETL code through the central repository

Migrating ETL code with export/import

Debugging job execution

Monitoring job execution

Building an external ETL audit and audit reporting

Using built-in Data Services ETL audit and reporting functionality

Auto Documentation in Data Services

Validating and Cleansing Data

Introduction

Creating validation functions

Using validation functions with the Validation transform

Reporting data validation results

Using regular expression support to validate data

Enabling dataflow audit

Data Quality transforms – cleansing your data

Optimizing ETL Performance

Introduction

Optimizing dataflow execution – push-down techniques

Optimizing dataflow execution – the SQL transform

Optimizing dataflow execution – the Data_Transfer transform

Optimizing dataflow readers – lookup methods

Optimizing dataflow loaders – bulk-loading methods

Optimizing dataflow execution – performance options

Advanced Design Techniques

Introduction

Change Data Capture techniques

Automatic job recovery in Data Services

Simplifying ETL execution with system configurations

Transforming data with the Pivot transform

Developing Real-time Jobs

Introduction

Working with nested structures

The XML_Map transform

The Hierarchy_Flattening transform

Configuring Access Server

Creating real-time jobs

Working with SAP Applications

Introduction

Loading data into SAP ERP

Introduction to Information Steward

Introduction

Exploring Data Insight capabilities

Performing Metadata Management tasks

Working with the Metapedia functionality

Creating a custom cleansing package with Cleansing Package Builder

Index

Customer Reviews

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Creating a workflow object

A workflow object is a reusable object in Data Services. Once created, the same object can be used in different places of your ETL code. For example, you can place the same workflow in different jobs or nest it in other workflow objects by placing them in the workflow workspace.

Note

Note that a workflow object cannot be nested inside a dataflow object. Workflows are used to group dataflow objects and other workflows so that you can control their execution order.

Every workflow object has its own local variable scope and can have a set of input/output parameters so that it can "communicate" with the parent object (in which it is nested) by accepting input parameter values or sending values back through output parameters. A script object placed inside the workflow becomes part of the workflow and shares its variable scope. That is why all workflow local variables can be used within the scripts placed directly into the workflow or passed to the child objects by going...

SAP Data Services 4.x Cookbook

SAP Data Services 4.x Cookbook

Overview of this book

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SAP Data Services 4.x Cookbook

Creating a workflow object

Note