Exercise 8: Basic ABAP Statements

689 Pages·2008·47.63 MB·English

TAW10_1
ABAP Workbench Fundamentals
SAP NetWeaver
Date
Training Center
Instructors
Education Website
Instructor Handbook
Course Version: 63
Course Duration: 10 Day(s)
Material Number: 50089085
Owner: Christian Braun (D035329)
An SAP Compass course - use it to learn, reference it for work
Copyright
Copyright'2008SAPAG.Allrightsreserved.
Nopartofthispublicationmaybereproducedortransmittedinanyformorforanypurposewithoutthe
expresspermissionofSAPAG.Theinformationcontainedhereinmaybechangedwithoutpriornotice.
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About This Handbook
This handbook is intended to complement the instructor-led presentation of this
course,andserveasasourceofreference. Itisnotsuitableforself-study.
Typographic Conventions
AmericanEnglishisthestandardusedinthishandbook. Thefollowingtypographic
conventions are also used.
Type Style Description
Example text Words or characters that appear on the screen. These
includefieldnames,screentitles,pushbuttonsaswellas
menunames, paths, and options.
Also used for cross-referencesto otherdocumentation
both internal (in this documentation) and external (in
other locations, suchasSAPNet).
Exampletext Emphasized words or phrases in body text, titles of
graphics, and tables
EXAMPLETEXT Namesofelementsinthesystem. Theseincludereport
names,programnames,transactioncodes,tablenames,
andindividualkeywordsof aprogramminglanguage,
when surrounded by body text, for example SELECT
and INCLUDE.
Example text Screen output. This includesfile and directory names
and their paths, messages, names of variables and
parameters,andpassagesofthesourcetextofaprogram.
Example text Exact user entry. These arewords and characters that
you enter in the system exactly as they appear in the
documentation.
<Example text> Variableuserentry. Pointedbracketsindicatethatyou
replace these words and characters with appropriate
entries.
iii
2008 ' 2008 SAP AG. All rights reserved.
AboutThisHandbook TAW10_1
Icons in Body Text
Thefollowing icons areused in thishandbook.
Icon Meaning
Formoreinformation,tips,orbackground
Noteorfurtherexplanationofpreviouspoint
Exception or caution
Procedures
Indicates that the item is displayed in the instructor(cid:146)s
presentation.
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Contents
Course Overview ............................................................................. vii
Course Goals.................................................................................vii
Course Objectives............................................................................x
Unit 1: The Big Picture........................................................................1
The SAP Software Portfolio.................................................................3
SAP Release Strategy..................................................................... 17
SAP NetWeaver ............................................................................ 28
Unit 2: Navigation ............................................................................ 41
Navigation in General...................................................................... 43
Advanced Navigation in the SAP GUI ................................................... 60
Unit 3: The System Kernel.................................................................. 81
Principal Architecture of the SAP NetWeaver Application Server.................... 82
AS ABAP processes ......................................................................103
Unit 4: Communication and Integration Technologies .............................137
Cross-System Business Processes.....................................................139
Remote Function Calls and BAPIs......................................................145
Enterprise Services-Oriented Architecture (Enterprise SOA)........................156
Web Services ..............................................................................165
Unit 5: Flow of an ABAP Program.......................................................177
System Architecture and ABAP Programs.............................................178
Unit 6: Introduction to the ABAP Workbench ........................................195
Repository and Object Navigator........................................................197
Developing Programs and Organizing Developments................................209
Unit 7: Basic ABAP Language Elements...............................................247
Working with Elementary Data Objects.................................................248
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2008 ' 2008 SAP AG. All rights reserved.
Contents TAW10_1
Unit 8: Modularization......................................................................291
Modularization - Basics and Overview..................................................293
Modularization with Subroutines.........................................................302
Modularization with Function Modules..................................................324
Modularization with Methods of Global Classes.......................................360
Modularization with Methods of Local Classes (Preview)............................392
Unit 9: Complex Data Objects............................................................403
Working with Structures...................................................................404
Using internal tables.......................................................................419
Unit 10: Data Modeling and Data Retrieval............................................451
Data Modeling and Transparent Tables in the ABAP Dictionary ....................453
Reading Database Tables................................................................470
Authorization Check.......................................................................512
Unit 11: ABAP Open SQL..................................................................533
ABAP Open SQL: Optimizing Statements..............................................534
Unit 12: Selection Screen..................................................................555
Generating and Designing the Selection Screen......................................557
Input Checks and Variants................................................................584
Selection screen: Modifications at Runtime............................................596
Unit 13: Programs Calls and Data Storage Management ..........................611
Programs Calls and Data Storage Management......................................613
Unit 14: New Test Tools....................................................................645
The Code Inspector .......................................................................646
Glossary .......................................................................................661
Index............................................................................................669
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'2008SAPAG.Allrightsreserved. 2008
Course Overview
This training course, lasting two weeks, provides a comprehensive and detailed
introduction to the basics of ABAP programming and the ABAP Workbench
tools. Furthermore, this course, along with TAW11 and TAW12, prepares you for
certificationfortheSAPCertifiedDevelopmentAssociate-ABAP-SAPNetWeaver
7.0.
Target Audience
Thiscourseisintended for thefollowingaudiences:
(cid:149) Developmentconsultantsanddeveloperswhoareresponsibleforadaptingand
developing ABAP/ABAP Objects programs.
Course Prerequisites
Required Knowledge
(cid:149) Solid data processing (DP) basic knowledge
(cid:149) Soundprogrammingexperiencewithanotherprogramminglanguage
Course Duration Details
Unit 1: The Big Picture
The SAP Software Portfolio 60 Minutes
SAP Release Strategy 30 Minutes
Exercise 1: SAP Release Strategy 10 Minutes
SAP NetWeaver 20 Minutes
Unit 2: Navigation
Navigation in General 40 Minutes
Exercise 2: Logon and Screen Design 10 Minutes
Advanced Navigation in the SAP GUI 60 Minutes
Exercise 3: Calling Functions 30 Minutes
Unit 3: The System Kernel
Principal Architecture of the SAP NetWeaver
Application Server 60 Minutes
AS ABAP processes 80 Minutes
Unit 4: Communication and Integration Technologies
Cross-System Business Processes 30 Minutes
vii
2008 ' 2008 SAP AG. All rights reserved.
Course Overview TAW10_1
Remote Function Calls and BAPIs 30 Minutes
Exercise 4: Remote Function Calls and BAPIs 10 Minutes
Enterprise Services-Oriented Architecture
(Enterprise SOA) 30 Minutes
Web Services 30 Minutes
Unit 5: Flow of an ABAP Program
System Architecture and ABAP Programs 20 Minutes
Unit 6: Introduction to the ABAP Workbench
Repository and Object Navigator 45 Minutes
Developing Programs and Organizing
Developments 95 Minutes
Exercise 5: Organizing Developments 5 Minutes
Exercise 6: Developing a Simple ABAP Program 10 Minutes
Exercise 7: Create transactions 10 Minutes
Unit 7: Basic ABAP Language Elements
Working with Elementary Data Objects 75 Minutes
Exercise 8: Basic ABAP Statements 30 Minutes
Exercise 9: Debugging Statements on Elementary
Data Objects 25 Minutes
Unit 8: Modularization
Modularization - Basics and Overview 10 Minutes
Modularization with Subroutines 60 Minutes
Exercise 10: Subroutines 30 Minutes
Modularization with Function Modules 80 Minutes
Exercise 11: Using a Function Module 20 Minutes
Exercise 12: Creating a Function Group 10 Minutes
Exercise 13: Creating and Using a Function Module 30 Minutes
Modularization with Methods of Global Classes 30 Minutes
Exercise 14: Using Global Static Methods 20 Minutes
Exercise 15: Creating Global Classes 10 Minutes
Exercise 16: Creating and Using Global Static
Methods 30 Minutes
Modularization with Methods of Local Classes
(Preview) 15 Minutes
Unit 9: Complex Data Objects
Working with Structures 30 Minutes
Exercise 17: Working with Structures 35 Minutes
Using internal tables 90 Minutes
Exercise 18: Using internal tables 25 Minutes
viii
'2008SAPAG.Allrightsreserved. 2008
TAW10_1 Course Overview
Unit 10: Data Modeling and Data Retrieval
Data Modeling and Transparent Tables in the ABAP
Dictionary 30 Minutes
Exercise 19: Analyzing Transparent Tables in the
ABAP Dictionary 20 Minutes
Reading Database Tables 90 Minutes
Exercise 20: Data Retrieval by Single Record
Access 20 Minutes
Exercise 21: Data Retrieval Using a SELECT Loop 25 Minutes
Exercise 22: (Optional) Data Retrieval by Mass
Access (Array Fetch) 25 Minutes
Authorization Check 45 Minutes
Exercise 23: Authorization Check 10 Minutes
Unit 11: ABAP Open SQL
ABAP Open SQL: Optimizing Statements 40 Minutes
Unit 12: Selection Screen
Generating and Designing the Selection Screen 40 Minutes
Exercise 24: Generating and Designing the
Selection Screen 60 Minutes
Input Checks and Variants 30 Minutes
Exercise 25: Input Checks and Variants 20 Minutes
Selection screen: Modifications at Runtime 30 Minutes
Exercise 26: Selection screen: Modifications at
Runtime 40 Minutes
Unit 13: Programs Calls and Data Storage Management
Programs Calls and Data Storage Management 40 Minutes
Exercise 27: ABAP Memory 30 Minutes
Unit 14: New Test Tools
The Code Inspector 30 Minutes
Exercise 28: The Code Inspector 30 Minutes
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2008 ' 2008 SAP AG. All rights reserved.
Course Overview TAW10_1
Course Goals
This course will prepare you to:
(cid:149) Work with the ABAP Workbench tools
(cid:149) Write your own simple ABAP programs
(cid:149) Carry out database read accesses
(cid:149) Developsimplereusecomponents(subroutines,functionmodulesandmethods)
and use them in programs
(cid:149) Program dynamic screen processing
(cid:149) ProgramuserdialogsusingthedifferentscreenelementsintheSAPsystem
(cid:149) DescribethefunctionoftheABAPDictionaryintheSAPsystem
(cid:149) Define database objects and use them
(cid:149) Create andadminister user-defined data types
(cid:149) Use the services in the ABAP Dictionary
(cid:149) UnderstandhowtheABAPDictionaryislinkedtothedevelopmentandruntime
environments
Course Objectives
After completing thiscourse, you will beableto:
(cid:149) Describe the structure of an SAP system
(cid:149) Use the ABAP Workbench tools
(cid:149) Createandcallsubroutines,functionmodulesandmethods
(cid:149) Write user-friendly dialog programs
(cid:149) ImplementandprocessscreenelementsintheSAPsystem
(cid:149) Create a user interface for a program
(cid:149) UseanddescribetheABAPDictionaryanditsservices
(cid:149) ModeldataandreaddatausingSQLfromthedatabase
(cid:149) Program in a performance-sensitive manner
(cid:149) Use the Code Inspector
SAP Software Component Information
TheinformationinthiscoursepertainstothefollowingSAPSoftwareComponents
and releases:
(cid:149) ERP 6.1
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'2008SAPAG.Allrightsreserved. 2008