#SAP ABAP WEB DYNPRO TRAINING CODE#

Global variables, structures and internal tables should be started in code from GV_, GS_ and GT_ respectively, like GV_FLAG, GS_PREF, GT_ALV.Local variables, structures and internal tables should be started in code from LV_, LS_ and LT_ respectively, like LV_MATNR, LS_AREA, LT_EKKO.Field-symbols are usually marked as, like.resulting parameters are named RT_, like RT_result.changing parameters are named CH_, like CH_table.exporting parameters are named EX_, like EX_data.importing parameters are named IM_, like IM_handler.Parameters of methods should be named in a following way:.Interfaces are better to start from IF_, like IF_ALERT_READER.Local classes are usually started from CL_, like CL_ORDER_FACTORY.fields symbols are enclosed in angle-brackets.

the names of predefined ABAP types or objects (function modules, function pools, tables, etc.) cannot be used by user.

the first character must be a letter or an underscore.

allowed characters for variablesвЂ™ naming are letters A-Z, digits from 0 to 9 and underscore sign, all other characters are prohibited.

variable name cannot exceed 30 characters.

Other restrictions one can follow during the developments are: Customers are allowed to create and edit object starting only from Z_ and Y_, and all other letters are reserved by SAP. What does it mean in practice? As SAPвЂ™s greatest value is stability and maintainability of code, it doesnвЂ™t allow to edit or create just everything you want, and all parts of any SAP system are strictly divided into standard and customerвЂ™s namespaces. SAP ABAP Naming ConventionsДЄll developments in ABAP are done in user namespaces Z and Y, they also called customerвЂ™s namespaces. It also has downsides though: maintenance of such systems often turns into pain, as one should be aware of all legacy code specifics and know obsolete syntax. Downward compatibility holds pride of place in ABAP and any piece of ABAP code can be reused continuously on any version ABAP on any platform with rare exceptions. As we speak about enterprise software, which prioritize safety, compatibility, scalability and reliability, all these concepts are fully implemented in ABAP language. ABAP can be generally classified as high-level programming language which experienced strong influence of Cobol language and even has some common syntax constructs.ДЄBAP mostly deals with common business entities which are predefined in SAP, such as order, quotation, delivery and so on, so it contains strong typing and a big toolset of predefined types, it also utilizes centralized reusable code library. It is not used for system or low-level programming, unlike C or C++ and cannot be used standalone without SAP installation. It is mainly used in several SAP products, main of which is SAP ERP, and used mostly for programming business applications. ABAP was developed by SAP SE company and stands for German abbreviation Allgemeiner Berichts-Aufbereitungs-Prozessor, which can be roughly translated as Advanced Business Application Programming, which generally makes sense.

Sap abap web dynpro training