When you call a function module, an instance of its function group plus its data, is loaded into the memory area of the internal session. An ABAP program can load several instances by calling function modules from different function groups.
SAP R/3 refers to Systems Application and Product for data processing Real-time having a 3 tier architecture i.e. Presentation layer, Application layer and Database layer.
There are five contents in Technical Settings:
Buffering Type and
Function Groups act as containers for Function Modules that logically belong together.
1) These cannot be defined in a Function Module.
2) It cannot be called.
3) They are containers for Function Module.
1) These must be defined in a Function Group.
2) It can be called from any program.
3) They are not containers for Function Group.
Central information repository for application and system data. The ABAP Dictionary contains data definitions (metadata) that allow you to describe all of the data structures in the system (like tables, views, and data types) in one place. This eliminates redundancy.
Domain - Specifies the technical attributes of a data element - its data type, length, possible values, and appearance on the screen. Each data element has an underlying domain. A single domain can be the basis for several data elements. Domains are objects in the ABAP Dictionary.
Data Element - Describes the business function of a table field. Its technical attributes are based on a domain, and its business function is described by its field labels and documentation.
Aggregate Object – Views, Match Code and Lock objects are called aggregate objects because they are formed from several related table.
View - A view is a virtual table containing fields from one or more tables. A virtual table that does not contain any data, but instead provides an application-oriented view of one or more ABAP Dictionary tables.
Different Types of View:
Database – It is on more than two tables.
Projection – It is only on one table.
No, we cannot print decimals in type N because decimal places are not permitted with N data type.
Float Data Type: It cannot be declared in Parameters.
Packed Number: It can be declared in Parameters.
PARAMETERS: A (4) TYPE P DECIMALS 2, B (4) TYPE P DECIMALS 2.
DATA: C (4) TYPE P DECIMALS 2.
C = A + B.
WRITE: / ‘THE SUM IS’, C.
There are three different functions used in SAP Script:
Parameters in Each Function:
There are 6 events in report:
At Line Selection
At User Command
At PF (nn)
There are four standard layouts in the SAP Script:
SELECTION-SCREEN BEGIN OF BLOCK ABC WITH FRAME TITLE T01.
SELECTION-SCREEN BEGIN OF SCREEN 500 AS WINDOW.
CALL SELECTION-SCREEN 500 STARTING AT 10.
The ABAP system fields are active in all ABAP programs. They are filled by the runtime environment, and you can query their values in a program to find out particular states of the system. Although they are variables, you should not assign your own values to them, since this may overwrite information that is important for the normal running of the program. However, there are some isolated cases in which you may need to overwrite a system variable. For example, by assigning a new value to the field SY-LSIND, you can control navigation within details lists.
SAP Script – It is the integrated text management system of the SAP R/3 System.
Reports - It is the way to display data fetched from database table onto screen or directly output it to a printer.
SY-TABIX - Current line of an internal table. SY-TABIX is set by the statements below, but only for index tables. The field is either not set or is set to 0 for hashed tables.
* APPEND sets SY-TABIX to the index of the last line of the table, that is, it contains the overall number of entries in the table.
* COLLECT sets SY-TABIX to the index of the existing or inserted line in the table. If the table has the type HASHED TABLE, SY-TABIX is set to 0.
* LOOP AT sets SY-TABIX to the index of the current line at the beginning of each loop loss. At the end of the loop, SY-TABIX is reset to the value that it had before entering the loop. It is set to 0 if the table has the type HASHED TABLE.
* READ TABLE sets SY-TABIX to the index of the table line read. If you use a binary search, and the system does not find a line, SY-TABIX contains the total number of lines, or one more than the total number of lines. SY-INDEX is undefined if a linear search fails to return an entry.
* SEARCH FOR sets SY-TABIX to the index of the table line in which the search string is found.
SY_INDEX - In a DO or WHILE loop, SY-INDEX contains the number of loop passes including the current pass.
Logical Databases are special ABAP programs that retrieve data and make it available to application programs.
Use of LDB – is used to read data from database tables by linking them to executable ABAP programs
There are Two Events:
GET - This is the most important event for executable programs that use a logical database. It occurs when the logical database has read a line from the node and made it available to the program in the work area declared using the statement NODES table Tag. The depth to which the logical database read is determined by the GET statements
PUT - The PUT statement directs the program flow according to the structure of the logical database.
GET - After the logical database has read an entry from the node table Tag.
GET LATE - After all the nodes of the logical database have been processed that are below <table> in the database hierarchy.
There are three types:
The Events used in ABAP are:
2. AT SELECTION-SCREEN
3. AT SELECTION-SCREEN ON <field>
6. TOP-OF-PAGE DURING LINE SELECTION
9. AT USER-COMMAND
10. AT LINE-SELECTION
11. AT PF<NN>
13. GET LATE.
14. AT User Command
An output list which displays just the basic details & allow user to interact, so that a new list is populated based on user-selection. With interactive list, the user can actively control data retrieval and display during the session.
Top-of-Page during line-selection.
I had worked with the following (30) system fields:
1) SY-DBSYS - Central Database
2) SY-HOST - Server
3) SY-OPSYS - Operating System
4) SY-SAPRL - SAP Release
5) SY-SYSID - System Name
6) SY-LANGU - User Logon Language
7) SY-MANDT - Client
8) SY-UNAME - Logon User Name
9) SY-DATLO - Local Date
10) SY-DATUM - Server Date
11) SY-TIMLO - Local Time
12) SY-UZEIT - Server Time
13) SY-DYNNR - Screen Number
14) SY-REPID - Current ABAP program
15) SY-TCODE - Transaction Code
16) SY-ULINE - Horizontal Line
17) SY-VLINE - Vertical Line
18) SY-INDEX - Number of current loop Pass
19) SY-TABIX - Current line of internal table
20) SY-DBCNT - Number of table entries processed
21) SY-SUBRC - Return Code
22) SY-UCOMM - Function Code
23) SY-LINCT - Page Length of list
24) SY-LINNO - Current Line
25) SY-PAGNO - Current Page Number
26) SY-LSIND - Index of List
27) SY-MSGID - Message Class
28) SY-MSGNO - Message Number
29) SY-MSGTY - Message Type
30) SY-SPONO - Spool number during printing
Primary Key – It can accept 0 values and cannot be NULL.
Unique Key – It can be NULL.
Select-options: dame for deptt-dname.
Remote Function Call.
PBO (Process before Output) – Before the screen is displayed, the PBO event is processed.
PAI (Process after Input) – When the user interacts with the screen, the PAI event is processed.
POH (Process On Help) - are triggered when the user requests field help (F1). You can program the appropriate coding in the corresponding event blocks. At the end of processing, the system carries on processing the current screen.
POV (Process On Value) - are triggered when the user requests possible values help (F4). You can program the appropriate coding in the corresponding event blocks. At the end of processing, the system carries on processing the current screen.
It stores the click value and display the related record in the secondary list.
In a LOOP statement.
5th April | 08:00 AM