SAP ABAP Training in Bangalore (Tutorial and Notes from RadiantTCO)

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SAP ABAP Training Tutorial and Notes

• RadiantTCO

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What is ABAP
ABAP(Advanced Business Application Programming)
is one of the many application-specific
fourth-generation languages (4GLs) first
developed in the 1980s. It was originally the
report language for SAP R/2, a platform that
enabled large corporations to build mainframe
business applications for materials management
and financial and management accounting. 
SAP's current development platform NetWeaver
supports both ABAP and Java.
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What is ABAP

• The ABAP language was originally used by
  developers to develop the SAP R/3 platform. It
  was also intended to be used by SAP customers to
  enhance SAP applications customers can develop
  custom reports and interfaces with ABAP
  programming. The language is fairly easy to learn
  for programmers but it is not a tool for direct
  use by non-programmers. Knowledge of relational
  database design and preferably also of
  object-oriented concepts is necessary to create
  ABAP programs.
• ABAP remains as the language for creating
  programs for the client-server R/3 system, which
  SAP first released in 1992. As computer hardware
  evolved through the 1990s, more and more of SAP's
  applications and systems were written in ABAP. By
  2001, all but the most basic functions were
  written in ABAP. In 1999, SAP released an
  object-oriented extension to ABAP called ABAP
  Objects, along with R/3 release 4.6.

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ABAP runtime environment

• All ABAP programs reside inside the SAP
  database. They are not stored in separate
  external files like Java or C programs.
• In the database all ABAP code exists in two
  forms source code, which can be viewed and
  edited with the ABAP Workbench tools and
  generated code, a binary representation somewhat
  comparable with Java byte code. ABAP programs
  execute under the control of the runtime system,
  which is part of the SAP kernel. 

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ABAP runtime environment

• The runtime system is responsible for processing
  ABAP statements, controlling the flow logic of
  screens and responding to events (such as a user
  clicking on a screen button) in this respect it
  can be seen as a Virtual Machine comparable with
  the Java VM. A key component of the ABAP runtime
  system is the Database Interface, which turns
  database-independent ABAP statements ("Open SQL")
  into statements understood by the underlying DBMS
  ("Native SQL"). The database interface handles
  all the communication with the relational
  database on behalf of ABAP programs It also
  contains extra features such as buffering of
  tables and frequently accessed data in the local
  memory of the application server.

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Program Types and Execution

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• When you run an ABAP program, you call its
  processing blocks in a specific sequence. This is
  controlled from outside the program by the
  processors of the current work process. For the
  purposes of program flow, we can summarize the
  screen processor and ABAP processor of the work
  processes involved into the ABAP runtime
  environment. The runtime environment contains a
  range of special control patterns that call
  screens and processing blocks in certain orders.
  These successive sections are also called
  processors. When you run an ABAP program, the
  control passes between various processors.

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Program Types and Execution
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Types of ABAP programs

• As in other programming languages, an ABAP
  program is either an executable unit or a
  library, which provides reusable code to other
  programs and is not independently executable.
• ABAP distinguishes two types of executable
  programs
• Reports
• Module pools

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The non-executable program types are

• INCLUDE modules
• Subroutine pools
• Function groups
• Object classes
• Interfaces
• Type pools

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ABAP Workbench

• ABAP Editor for writing and editing reports,
  module pools, includes and subroutine pools
  (SE38)
• ABAP Dictionary for processing database table
  definitions and retrieving global types (SE11)
• Menu Painter for designing the user interface
  (menu bar, standard toolbar, application toolbar,
  function key assignment) (SE41)
• Screen Painter for designing screens and flow
  logic (SE51)
• Function Builder for function modules (SE37)
• Class Builder for ABAP Objects classes and
  interfaces (SE24)

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Data types and variables

• ABAP provides a set of built-in data types. In
  addition, every structure, table, view or data
  element defined in the ABAP Dictionary can be
  used to type a variable. Also, object classes and
  interfaces can be used as types.
• The built-in data types are

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ABAP Objects

• The ABAP language supports  object-oriented
  programming, through a feature known as "ABAP
  Objects". This helps to simplify applications and
  make them more controllable.
• ABAP Objects is fully compatible with the
  existing language, so one can use existing
  statements and modularization units in programs
  that use ABAP Objects, and can also use ABAP
  Objects in existing ABAP programs. Syntax
  checking is stronger in ABAP Objects programs,
  and some syntactical forms (usually older ones)
  of certain statements are not permitted.

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ABAP statements an overview

• In contrast with languages like C/C or Java,
  which define a limited set of language-specific
  statements and provide most functionality via
  libraries, ABAP contains an extensive body of
  built-in statements. These statements often
  support many options, which explains why ABAP
  programs look "verbose", especially when compared
  with programs written in C, C or Java.
• This section lists some of the most important
  statements in the language, subdivided by
  function. Both the statements listed here and the
  subdivision used are fairly arbitrary and by no
  means exhaustive.

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ABAP User Interfaces
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Join RadiantTCO to learn more about ABAP

• This training course not only gives you an a
  thorough insight into how the SAP programming
  language works but is delivered in such a way
  that everyone who takes the course will have
  absolutely no problem in understanding all the
  topics discussed.
• This course makes it so easy to learn SAP ABAP,
  you will be writing and testing out you own code
  in no time. So not to bog you down with theory
  this course focuses on learning through a
  hands-on approach and is packed full of practical
  step by step examples so that you are creating
  code from day one.

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Join RadiantTCO to learn more about ABAP

• Whether you're new to programming or just new to
  ABAP, this SAP ABAP course is your guide to
  rapid, real-world enterprise software
  development.
• By the completion of this online training course,
  you will be fully versed, and capable of working
  with and creating your own ABAP programs in a
  commercial Environment.
• Join us to boost your career in SAP ABAP
• Contact Us
• Email hr_at_radianttco.com
• Phone [phone]