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SAP ABAP Advanced Cookbook
SAP ABAP Advanced Cookbook

SAP ABAP Advanced Cookbook: Featuring over 80 sophisticated recipes, this is a superb tutorial for ABAP developers and consultants. It teaches you advanced SAP programming using the high level language through diagrams, step-by-step instructions, and real-time examples.

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SAP ABAP Advanced Cookbook

Chapter 2. Dynamic Programming

In this chapter, we will cover recipes related to dynamic programming. This chapter is designed to provide useful recipes related to field symbols and data references, as well as dynamic SQL and ABAP code generation. In this chapter, we will look at the ways of:

  • Using field symbols and data references to print database table contents

  • Applying dynamic Open SQL

  • Dynamic program generation

Introduction


This chapter explores recipes related to dynamic programming. Dynamic programming is a very vast topic. It may be simply defined as a technique whose behavior/effect is only evident at execution time. There are many facets of dynamic programming with ABAP. These include generic programming such as dynamic source code generation. Also specifying parts of the Open SQL statements (clauses) dynamically using string variables, and the creation of data objects based on a type known only at runtime are within the dynamic programming landscape. When using dynamic programming, we may also sometimes need to determine the data type of data objects at runtime. This is called Runtime Type Identification (RTTI).

The ABAP language provides a number of features/options for making programs dynamic or to avoid hardcoding of values. We will start with application of field symbols and references. As an example, we will create a program that will take as input the name of a table and print its contents...

Using field symbols and data references to print database table contents


Field symbols and references are an important combination for dynamic programming. Data references are addresses of data objects stored in reference variables. Field symbols are placeholders, or symbolic representations of these data objects.

This recipe shows how to print all the contents of a particular database table (the name of which is only known at runtime). For simplicity sake, we will only focus on the main logic pertaining to dynamic programming. In addition to data references and field symbols, we will also see some dynamic SQL statement application.

Getting ready

The code will let you create a small data browser program that will take as input the database table name whose contents are to be read, and the number of rows and columns (fields) to be displayed. The output displays the table's field names as column headers along with the data stored in the table.

The knowledge of the describe_by_data method of the...

Applying dynamic Open SQL


The Open SQL statement components may be specified statically or dynamically. This applies to database read statement SELECT, as well as data manipulation statements such as INSERT and UPDATE. The primary emphasis of this recipe will be on dynamic specifications of the various components of the SELECT statement. The previous recipe saw some usage of the dynamic SQL in the SELECT statement, where the table name, the target area internal table (pointed to by a field symbol), and the number rows to read using UP TO addition were specified dynamically. In addition to these, the GROUP BY, the ORDER BY, and WHERE conditions may be specified dynamically.

In this recipe, we will create a program that will take input from the user and create dynamic specifications for the where condition and the order by clause. (For simplicity's sake we emphasize on the dynamic where and order by clauses and keep the table name as spfli).

Getting ready

We will create a program that will contain...

Dynamic program generation


The ABAP language also allows the creation of ABAP programs at runtime. An INSERT REPORT statement may be used for creating a new program specified by the a name in the statement. Dynamic program generation should only be used when there is no alternate option.

Also, you may generate a subroutine pool using a GENERATE subroutine pool statement. A subroutine pool is generated, and is of a temporary nature. The subroutines in the pool may be called from within the generation program.

On the other hand, the programs created via the INSERT REPORT statement are permanent and overwrite any prior existing programs with the same name. Within the generation program, the new program may be called via a SUBMIT statement.

Getting ready

We will use the concepts of dynamic program generation in order to show how a simple requirement may be solved. We will take as input two program names. The code of the first program will be read and then any comments or unwanted blank lines will...

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Key benefits

  • Full of illustrations, diagrams, and tips with clear step-by-step instructions and real time examples
  • Get to grips with solving complicated problems using Regular Expressions in ABAP
  • Master the creation of common Design Patterns using ABAP Objects
  • Enhance SAP applications through the use of ABAP programming
  • Covers the newest topics of Adobe Interactive Forms

Description

ABAP (Advanced Business Application Programming) is SAP's proprietary 4th Generation Language (4GL). SAP core is written almost entirely in ABAP.ABAP is a high level programming language used in SAP for development and other customization processes."SAP ABAP Advanced Cookbook"ù covers advanced SAP programming applications with ABAP. It teaches you to enhance SAP applications by developing custom reports and interfaces with ABAP programming. This cookbook has quick and advanced real world recipes for programming ABAP.It begins with the applications of ABAP Objects and ALV tips and tricks. It then covers Design Patterns and Dynamic Programming in detail.You will also learn the usage of quality improvement tools such as transaction SAT, SQL Trace, and the Code Inspector.Simple transformations and its application in Excel Downloading will also be discussed, as well as the newest topics of Adobe Interactive Forms and the consumption and creation of Web services. The book comes to an end by covering advanced usage of Web Dynpro for ABAP and the latest advancement in Floorplan Manager.

Who is this book for?

If you are an ABAP developer and/or consultant looking forward to building advanced SAP programming applications with ABAP, then this is the best guide for you. Basic knowledge of ABAP programming is required.

What you will learn

  • Master the advanced features of Web Dynpro programming
  • Experience the latest advancements in FloorPlan Manager design
  • Learn how to use transaction SAT and secondary internal table indexes for performance improvement
  • Explore the world of Simple Transformations and how they solve problems
  • Get step-by-step instructions to create and consume Web Services
  • Optimize program code and find datasource of fields using SQL Trace
  • Get valuable tips and tricks for Smart Forms and Adobe Interactive Forms
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Publication date : Dec 26, 2012
Length: 316 pages
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Language : English
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Table of Contents

15 Chapters
ABAP Objects Chevron down icon Chevron up icon
Dynamic Programming Chevron down icon Chevron up icon
ALV Tricks Chevron down icon Chevron up icon
Regular Expressions Chevron down icon Chevron up icon
Optimizing Programs Chevron down icon Chevron up icon
Doing More with Selection Screens Chevron down icon Chevron up icon
Smart Forms – Tips and Tricks Chevron down icon Chevron up icon
Working with SQL Trace Chevron down icon Chevron up icon
Code Inspector Chevron down icon Chevron up icon
Simple Transformations Chevron down icon Chevron up icon
Sending E-mail Using BCS Classes Chevron down icon Chevron up icon
Creating and Consuming Web Services Chevron down icon Chevron up icon
SAP Interactive Forms by Adobe Chevron down icon Chevron up icon
Web Dynpro for ABAP Chevron down icon Chevron up icon
Floorplan Manager Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.9
(7 Ratings)
5 star 85.7%
4 star 14.3%
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1 star 0%
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Piotr Stasierski Jan 10, 2014
Full star icon Full star icon Full star icon Full star icon Full star icon 5
It helped me in my office work, gave me few tricks I didn't know them.For me the form of this book is attractive
Amazon Verified review Amazon
Kumar Feb 09, 2014
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Hi !Super Buch. Ich habe intensiv das Buch gelesen und die Themen sind exakt so wie in der Industrie auftauchen!Kumar Mitra-Endres
Amazon Verified review Amazon
Gordon Du Mar 21, 2013
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Although I am just starting to use ABAP and am a beginner, I reallyappreciate the simplicity found in the SAP ABAP Advanced Cookbook.This book is probably one of the most helpful and most easily understandableguides for any SAP ABAP user. The book has over 80 advanced "recipes" whichillustrate some excellent programming techniques. The book is able to covera broad range of topics which commonly challenges the beginning and thesomewhat experienced ABAP developer; really helps in avoiding some of theheadaches in learning ABAP.The screenshots used in the book are quite intuitive. You can follow theillustrated steps easily to get the job done.No matter if the topic is on ABAP Objects or on ALV tips and tricks or thetopic relates to Design Patterns and Dynamic Programming, this book givesyou all kinds of recipes to work on. You can bypass anything you knowalready, but you are sure to love the tricks which you have not masteredyet.Simple transformations and its application in Excel Downloading will be goodfor you to link SAP with other commonly used applications.I give the book a 5 star rating for its simplicity and usefulness.
Amazon Verified review Amazon
F. Wacker Jun 28, 2014
Full star icon Full star icon Full star icon Full star icon Full star icon 5
very helpful and good. The Author uses very easy to understand code examples, that can be adopted to any other problem
Amazon Verified review Amazon
Ralf Wenzel Jun 05, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Zunächst: Das ist KEINE Übersetzung des ABAP-Kochbuches von Enno Wulff, sondern ein eigenständiges, sehr gutes Werk (sage ich mal nach über 15 Jahren SAP-Erfahrung). Verständlich geschrieben, mit witzigen Pointen drin, fachlich korrekt
Amazon Verified review Amazon
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