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Enterprise Programming
ABAP FUNDAMENTALS
What is ABAP?
Originally: Allgemeiner Berichts-Aufbereitungs-Prozessor (Generic Report Preparation/Generation Processor)
Now: Advanced Business Application Programming
Created by SAP initially for report creation. Later evolved into full language. Made public for program customization and enhancement by companies.
Notable for its database abstraction (logical databases) and ease of database interaction. Embedded SQL statements in code (Open SQL). Platform independent.
Extended in 1998 to include Object support (ABAP Objects). Developing using OO model recommended, but legacy procedural coding still supported.
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Learning ABAP—NetWeaver Programming Core
http://www.sap.com/services/education/catalog/netweaver/curriculum.epx?context=%5b%5bABAP_CORE%5d%5d%7c
NetWeaver Training Competencies and Options
https://training.sap.com/courses-and-curricula/netweaver
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SAP Basis Admin—sample job ad
3 - tiered architecture
Presentation Layer
Database Layer
Application Layer
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3 - tiered architecture + ABAP
Presentation Layer
Application Layer
Database Layer
ABAP Execution
ABAP Program & Data Storage
ABAP Programming & Output
3 - tiered architecture + ABAP (General)
Presentation Layer Application Layer Database Layer Run Transaction/Program
Screen
Screen
ABAP Program
Program Logic
Program Repository
Database Table(s)
Screen
Local Data Variables
Based on content from Unit 2, BC100 , figures 25 - 35
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Typical Company Installation Landscape
Server SAP ERP Client xxx
Development (DEV)
Server SAP ERP Client xxx
Test/Quality Assurance (QAS)
Server SAP ERP Client xxx
Production (PROD)
Server SAP ERP Client xxx Training (TRN)
Transport Transport
Programming Process
- Create new or select existing package.
- Create new or select existing transport request for package.
- Begin creating a new program.
- Enter developer key to authorize development (if not done previously).
- Create, debug program. Save.
- Test. Revise as necessary.
- Activate program.
- Transport package.
Items that will not be transported can be assigned to the local package $TMP.
Within our development landscape, transports are essentially to ‘dummy systems’.
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Beginning Programming
ABAP Development Rules:
ABAP programs made up of individual sentences / statements. Each statement begins with a keyword. Conventional to type keywords in all uppercase letters and variables, operators, etc. in all lowercase. Built in Pretty Printer Each statement ends with a period. Statements can be indented as desired. Statements can extend over multiple lines. Lines with * in column 1 are comment lines. Double quotes (“) are to-end-of-line comments.
Source: SAP BC100 , Page 60- 61
Various settings can be maintained through Utilities Settings , ABAP
Editor
Launch directly with transaction SE38 or SE80 for ABAP Workbench.
To avoid name collision, in all development done on our system begin your programs with the prefix Zxx_ where xx is your individual user number (the last 2 digits of your user name).
If you do your own practice development, enter source code from various sources, etc. you must comply with this requirement.
If you have access to multiple SAP systems note that this number will vary among systems.
If you want to create multiple instances of the same program (practice, redo, etc.), end instances with _01, _02, etc.
ABAP Editor
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Programming Basics—Program Creation
Right click on package in the Object Name list and select Create Program.
Program name in ALL CAPS (remember naming rules).
Unless needed (to be discussed later) TOP INCLUDE should be off.
Programming Basics—Creation Sequence
Title —brief program description.
Type —Executable program
Status —Test Program
Save/check this dialog and the one that shows the package and the transport request.
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Programming Basics—Begin Creating New Program
Option 2 : Use transaction SE38 to launch ABAP Editor.
Specify Program Name. Select Create.
Cannot create a new package with this sequence! But if one already exists, can use it.
Programming Basics—Enter, Check, Pretty Print, Run
Use editor to enter code. Many right-click options.
Check operation validates syntax.
Pretty Printer ‘cleans up’ code layout.
Direct Processing to run.
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SE16 showing table TSTCT limited to English
SCC
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SE38 ABAP Editor
SE80 ABAP Workbench
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