SAP ABAP Introducation
ABAP: (Advanced Business Application
Programming)
•
ABAP 4 is a programming language developed by SAP
for the interactive development of application programming.
•
ABAP 4 is a
fourth generation language.
•
ABAP 4 is
tightly integrated across all the modules viz like SD, MM, HR etc..
•
All
application programs, along with parts of the R/3 Basis system, are written in
the ABAP Workbench using ABAP, SAP’s programming language. The individual
components of application programs are stored in a special section of the
database called the R/3 Repository. The R/3 Repository serves as a central
store for all of the development objects in the R/3 System
•
It
contains the Cross application concept to exchange the data from one system to
another system
•
EX:
SAP to VB
JAVA to SAP
Characteristics
of ABAP/4:
•
ABAP/4
supports business-related data types and operations. You can execute
calculations using special date and time fields. The system automatically
executes all necessary type conversions.
•
ABAP/4
provides a number of functions for processing character strings.
•
ABAP/4
allows you to define and call subroutines. You can even call subroutines of
other programs. There are different ways of how to pass parameters to and from
the subroutines.
•
ABAP/4
contains a special type of subroutine, called function module. Function modules
are stored and maintained in a central library. They have clearly defined data
interfaces to the calling program. You can test function modules in a
stand-alone mode independent of the calling program.
•
ABAP/4
contains an SQL subset called OPEN SQL. OPEN SQL allows you to read and change
database tables independent of the underlying database system.
•
ABAP/4
allows you to define and process internal tables that exist only for the
execution period of the program. Internal tables most efficiently support the
usage of database tables and allow you to implement complex data structures in
a program.
•
ABAP/4
allows you to store data not only in databases but also as sequential files on
application and presentation servers.
ABAP we have
Reports:
Based on the given
input we will fetch the data from database and display it in predefined format
They
are 2 types of reports
1.Normal
reports
2.ALV
reports(ABAP List Viewer )
Transaction
code SE38.
Data Dictionary: Used for Database Table handling.. etc.
Transaction code SE11
Dialog Programming :
In dialog programming you use the Screen Painter to
create screens and program the sequence in which they appear. You write an
ABAP/4 program (ABAP/4 module pool) for your screens. This is a collection of
dialog modules which are called by the flow logic of your screens. You use
dialog programs for both reading and changing database tables.
SAP Scripts :
SAP script is the tightly integrated text management
system of the SAP R/3 System.
It will
therefore be used for many different text-processing tasks all over the SAP
System.
Example:
SAP
script is used for incorporating the company logo forms sets.
SAP Script can be used for printing the Sales order
or the purchase order in the company given preprinted format.
Smartforms: Used to develop the business
forms
Conversions: conversion programs are used
to migrate the data from the legacy system to SAP system
They are 2 types of conversion programs
1.BDC
2.LSMW
Batch Data Communication (BDC)
Batch Data Communication (BDC) offers transferring of data into the SAP System from other SAP
Systems and non-SAP Systems (legacy systems).
For example, the
data collection in some areas of your company is still performed by a
non-SAP system like VB-SQL or Java-Oracle etc. You can still consolidate all of
your data in the SAP System by exporting the data from the other system and
reading it into the SAP System with batch input.
Enhancements :
1.SAP offers a broad range of functionality with its
business application suite.
2.If standard applications do not offer some of the
functionality you need, You don’t
have to Panic!!
3. R/3 provides the flexibility to
Add-on/Bolt-on any application to its
standard functionality This facility is called “Enhancement” and called as
“User Exits”, “Menu Exits”, “Screen
Exits” and “Function Exits”.
4. Enhancement offers better alternative to the problem-ridden modification approach
Enhancements
are 1.User Exit
2.Customer
Exit
3.BADI’S
4.Enchancement frame work
Work Flows:
Work flow is used to automate the existing business
process
Interface: used to connect the SAP to SAP as well as SAP to
non-SAP
This are used to exchange the data from one system
to another system
Interfaces are 1.ALE/IDOC
2.BADI
