Transcript
April 12, 2023 1
Training On ABAP/4
By Pothuri Vinod Krishna
April 12, 2023 2
Introduction to SAP R/3
• SAP Pronounce as ESSAYPEE . Never pronounce as sap of a tree.
• Systems, Applications andProducts in Data Processing.
• R Real Time
• 3 3 Tier Architecture
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What is SAP R/3 ?
It is one of the ERP systems.
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What is ERP ?
Enterprise Resource Planning
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Main Aim of SAP R/3
SAP R/3 is mainly aimed at Business Applications like Finance, S&D, MM etc.,
Over 20,000 companies rely on this SAP R/3 system.
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These Companies include:
• Oil & Gas
• Transport
• Insurance
• Pharma
• Banking &
• Telecommunications etc.,
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Hardware Vendors:
• IBM
• Compaq
• Bull
• AT&T
• Sun etc.,
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Major Implementators:
• Price water House & Coopers
• Anderson Consulting
• Ernst & Young
• KPMG
• Deloitte & Touche etc.,
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History
Company : SAP AG
When : 1972
Where : Walldorf, Germany
By Whom : 4 former IBM employees.
R/3 Introduction : 1992
position in 1995(ISV) : 5
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SAP Products
• R/2 System
• R/3 System
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R/2 System
• It is a main frame system compatible to IBM, Siemens etc.,
• Data intensive and big centralised Industries.• It is not open system.
(It can not communicate with other systems. But with the help of ALE it can be linked to R/3 and can be made open system)
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R/3 system
• Client server system
• Multi Lingual
• It can be easily customized based on country’s needs.
• It has OSS (Online Support System)
• It has other services like Information service and Maintenance service.
• It has Preventive service (early watch serv.)
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SAP R/3 Architecture
Presenta ionServer
P resenta tionServer
P resenta tionServer
App lica tionServer
P resenta tionServer
P resenta ionServer
App lica tionServer
P resenta tionServer
App lica tionServer
DatabaseServer
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SAP R/3 Architecture contd.
Database Server : Stores Database.
Application Server : Contains Software for Running the
Application Logic.
Presentation Server : Graphical User Interface
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SAP R/3 Architecture contd.
The advantage of having 3 tier or 3 layered Architecture is to reduce traffic on the Database Server.
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SAP R/3 Architecture contd.
Based on the required degree of distribution, you can combine two servers or all three servers in the same machine (Stand alone).
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SAP R/3 Structure
• Application Layer for Standard and new applications.
• Middle ware Layer also called as R/3 Basis (will be discussed later)
• Operating System, DatabaseO.S Database GUI Protocols
NT Oracle Win 3.1 TCP/IP
Unix Ingress NT,95 CPC
AS/400 Informix,DB/2
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Components of M.W.Layer
• ABAP/4 Development Workbench
• Database Interface
• GUI etc.,
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ABAP/4 Dev Workbench
It contain different tools for development of ABAP/4 objects, checking and analysing programs and finally transportation of objects. 1) ABAP/4 Language 2) Data modeler
3) Object browser 4) Repository
5) Test & Analysing tools
6) The Query and 7) Work Bench Organizer
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ABAP/4 Language
It is the Central part of Middle ware layer that eliminates dependencies from Hardware, Operating Systems or database management systems.
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Data Modeler
Relation ship between the tables are stored in the form of ER diagrams.
(ER = Entity Relationship)
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Object Browser
Hirarcheal representation of Programs, Screens, Menus, Transactions, Tables etc.,
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Repository
The ABAP/4 Repository is made up of following Runtime Objects.
• Programs
• Screens and
• Dictionary
Dictionary contains Metadata. Metadata is nothing but description of data and definitions.
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Test & Analysing Tools
For testing and analysing performance of Programs and Transactions.
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Work Bench Organizer
Transportation of Objects between the systems.
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