SAP ABAP: Reporting Events in ALV

Alv Report Events In Sap Abap

ALV (ABAP LIST VIEWER) is a collection of function modules offered by SAP that can be utilized to enhance the appearance and functionality of report outputs. These ALV functions aim to improve the readability and usability of any generated report.

ALV, short for ABAP List Viewer, offers a predefined format and user interface for ABAP reports. It is developed using a collection of standard function modules provided by SAP.


What Are the Applications of ALV Reports?

We can create a field catalog using three different methods.

The Alv Report Events in SAP ABAP can be triggered automatically by utilizing a Data Dictionary structure.

By combining the two procedures mentioned above, it is possible to achieve a semi-automated process.

Create a table within the program called “internal table” that is of type SLIS_T_FIELDCAT_ALV.

Use the function module REUSE_ALV_FIELDCATALOG_MERGE to make a call.

What are the SLIS in ALV and its standard type tables?

To utilize the ALV in SAP ABAP, it is necessary to include the command TYPE-POOLS: SLIS at the start of your code.

How to Set Default Variant for ALV in SAP ABAP

The default variant for list display can be set by the user through programming.

The default variant can be found using the function module ‘REUSE_ALV_VARIANT_DEFAULT_GET’.

What is the Events Table in ALV?

The event table (I_EVENTS) is filled with a list of potential events when it is passed through the function module REUSE_ALV_EVENT_NAMES_GET. The resulting table from this function module contains all the available events.

What are the layout parameter options of ALV in SAP ABAP?

– Errors

– Summaries

– User engagement

– Detailed view

– Custom display options (applicable to structured lists)

– Visual enhancements

– Additional features

What are the Sort Internal Table Options in ALV?

The internal table consists of the following fields.

– Sops: Specifies the sorting sequence.

– Fieldname: Refers to the name of a field in an internal output table.

– Tab name: Only applicable for hierarchical-sequential lists. It represents the name of the internal output table.

Q10. What are the export parameters of function modules used in ALV reports?


ES_EXIT_CAUSED_BY_USER: Describing the manner in which the user exited from the list tables.

T_OUTTAB: Required table containing the data to be shown.

What Does a Report in SAP ABAP Refer to?

1. Interactive reports and classic reports are two types of reporting in SAP ABAP.

2. In SAP ABAP, there are different kinds of reports such as interactive reports and classic reports.

In traditional reports, the results are displayed in a single list, while in interactive reports, they are shown in multiple lists.

What is the Definition of Classical Reports?

These reports are considered to be the most basic ones and are usually the first ones that programmers learn. They involve generating an output of data by utilizing the Write statement within a loop.

Classical reports are standard reports that do not contain any sub-reports. They only have one screen or list for displaying the output.

INITIALIZATION: This event occurs prior to the display of the selection screen.

AT-SELECTION-SCREEN: This event occurs once the user has entered their input on the selection screen but before it becomes inactive.

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The “START OF SELECTION” event occurs after the selection screen has been processed.

END-OF-SELECTION is used specifically for reporting in Logical Databases.

What Do Interactive Reports Entail?

The user has the ability to engage with the report and explore the data in more detail through a drill-down feature.

In SAP ABAP, it is possible to create a primary list with numbers starting from 0 and up to 20 secondary lists numbered from 1 to 21.

Events in SAP ABAP related to ALV Reports

The HIDE statement is used to store the information that will be shown in the secondary list.

The variable sy-lsind stores the level of the report, ranging from 0 to 21.

The AT LINE-SELECTION event is activated when we double click on a line in the list. When this event occurs, a new sublist will be created. Any statements that are returned under this event will be shown on the newly generated sublist.

When the command AT USER-COMMAND is used, it allows for the inclusion of user function keys.

The TOP-OF-PAGE DURING LINE-SELECTION event is used to define the top of page behavior for a secondary list in SAP ABAP.

Q14. What are the different types of tables in the Data Dictionary and their descriptions?

– Table with visible structure

– Clustered table for efficient storage and retrieval

– Pooled table for shared data access

The pricing tables in SAP ABAP typically have names that begin with the letter A, followed by a series of numbers such as A001, A002, and so on.

Q17. What Is The Distinction Between Client-Specific and Client-Independent Tables?

In SAP ABAP, the presence of MANDT as the first field in a table determines whether it is client dependent or not. Typically, most tables are client dependent, meaning they store data specific to each client. However, there are a few exceptions such as RFC Connections table (RFCDES) and Batch Jobs (TBTCO and TBTCP), which do not depend on the client for their data storage.

Alv Report Events in SAP ABAP: Understanding the Distinction between At Selection Screen and At Selection Screen Output

AT SELECTION-SCREEN OUTPUT is similar to the Process Before Output Event in SAP ABAP. It occurs before the screen is shown and can be utilized to control the visibility of fields based on user selection.

When you press any key (such as Enter, Drop-Down, Help, Execute) after the selection screen appears, the AT SELECTION-SCREEN event is triggered.

Q19. What is the distinction between Clear and Refresh?

How to Obtain Default Values in the Selection Screen of ALV Reports?

To customize the ALV Report, you can create a variant that includes the desired columns, sorting criteria, and column widths. This variant can be saved as the default setting for future use.

To obtain the default variant, you can use the function module REUSE_ALV_VARIANT_DEFAULT_GET.

Q21. How to Create a Custom Table in SAP ABAP?

To generate the necessary Domains and Data elements, utilize transaction SE11.

Please ensure that you include all the necessary fields in your report, with “MANDT” being the first field. Each field should have the appropriate data elements or Built-in Types assigned to it.

Ensure that you choose the Primary Key for this table.

How to Enable Hotspot for a Field in ALV Reports

To enable the HOTSPOT property for a field in the Field Catalog table, you need to set its value as X.

What is the purpose of reuse_alv_fieldcatalog_merge?

By utilizing this function module, one can obtain the Field catalog for a specified Internal table or DD Structure. Upon acquiring the Field catalog, it becomes possible to modify the characteristics of each field.

Q24. What Is Significance Of Hide?

In SAP ABAP, when using interactive reports, the HIDE statement is used to store the value of a field for a specific line. If the user interacts with that line by clicking on something, those stored values are automatically filled into hidden fields.

Q25. What Is The Distinction Between Select Single And Select Up To One Row?

Ans: SELECT SINGLE can be used if you know the full key to select a record. If you do not have the full Key to select and you are interested in one single row, you could use SELECT UPTO 1 ROWS. If you use a SELECT SINGLE without a full key, you would get a warning message in Extended Program checks.

If you are only interested in retrieving one specific row and do not have the complete key for selection, an alternative approach is to use the SELECT UPTO 1 ROWS statement.

What Does Secondary Index Mean?

By default, a Primary Index is automatically created for the Primary Key of a table. Any additional index created for the same table is referred to as a Secondary Index. The purpose of creating Secondary Indexes is to enhance the performance of SELECT statements.

How to Generate Secondary Index in SAP ABAP?

To utilize SE11, input the name of the table and select the option for modification.

Click on the “Indexes” tab and choose the desired fields to create a secondary index. It is recommended to include MANDT as the first field, unless there is a specific reason not to do so.

The Purpose of Using ALV

ALV, which stands for Application List Viewer, is a tool provided by SAP (a software company) to improve the appearance and functionality of reports. In simple terms, it helps make reports easier to read and use.

SAP offers a collection of ALV function modules that can be used to enhance the output of a report. These function modules are like small programs that can be added to a report code to make it more visually appealing and user-friendly. They provide additional features such as sorting, filtering, grouping, and formatting options for the data in the report.

By using these ALV functions, developers can create reports that are not only informative but also easy for users to navigate and understand. For example, they can add interactive tables with column headers that allow users to sort or filter data based on their preferences. This makes it simpler for users to find specific information within large sets of data.

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Overall, ALV functions help improve the overall experience of working with reports in SAP systems by making them more visually appealing and providing additional functionalities for better usability.

How to Alter a Table?

You have the option to make changes to a record by using either the MODIFY statement or the UPDATE Statement.

What is the initial event name in ALV report?

The LOAD-OF-PROGRAM event is the first step in executing a program in SAP ABAP. It is responsible for loading the program into memory so that it can be executed. This event also includes executing any data declarations and type declarations that are present in the program.

Data declarations refer to defining variables or constants that will be used throughout the program. These declarations help allocate memory space for storing values during execution. Type declarations, on the other hand, define custom data types or structures that can be used to store related information.

What are ABAP Memory and SAP Memory and how to utilize them?

ABAP memory is a designated area of memory that can be accessed by all ABAP programs within the same internal session. This access is made possible through the use of EXPORT and IMPORT statements.

SAP memory is a designated area of storage that can be accessed by all primary sessions in SAPgui. It serves as a means to transfer data between programs within the same session or across different sessions. When utilizing SAP memory, application programs must utilize SPA/GPA parameters (also referred to as SET/GET parameters).

Managing SAP events: A guide to effectively handling them

To process an application event in SAP ABAP, you need to use the static method CL_GUI_CFW=>DISPATCH within a PAI module. This method helps in handling events that occur during the execution of an application.

In simpler terms, when an event occurs in your SAP ABAP program and you want to respond to it, you need to use the DISPATCH method provided by CL_GUI_CFW class. But remember that once this method is called for a specific event, you cannot call it again for the same event because its corresponding OK_CODE will no longer be available or valid.

When does the top-of-page event get triggered in SAP ABAP?

The TOP-OF-PAGE event is activated when the initial ULINE, WRITE, or SKIP statement is encountered in a program.

Creating an event in SAP: A step-by-step guide

To create an event in the Class Builder, follow these steps:

1. Open the desired class or interface.

2. Navigate to the Events tab page.

3. Add the following entries:

– Option: Specify any relevant options for the event.

– Description: Provide a brief explanation of what the event entails.

– Type: Determine and assign an appropriate type to the event.

Once you have entered all necessary information, remember to save your entries.

What Is The Distinction Between Skip and Reserve?

SKIP is used to create empty space between lines, whereas RESERVE is used to force a page break on the current page if there are fewer lines remaining until the page footer than what is specified in the RESERVE statement.

Alv Report Events in SAP ABAP: An Overview

SKIP creates a line with no content, whereas NEW-LINE moves the control to the next line.

Certainly. You can utilize the TOP-OF-PAGE DURING LINE-SELECTION event to achieve this functionality in SAP ABAP.

Q34. What Are Oss Notes?

Just for an example if you face any error in your system. Then there is error number associated with the error. Then you can search for the OSS not for the error number, and the note will give you possible solution to your problem.

What is the command to transfer data from one internal table to another in SAP ABAP?

In order to copy data from one internal table (ITAB) to another, we often use the APPEND statement within a loop. However, this method is not considered efficient. Alternatively, we can employ an alternative approach as outlined below:

How to Validate Input Values in Selection Screen and Identify the Fired Event

The at selection-screen event is utilized to validate the input fields on the selection screen. If there is a need to validate a specific input field, the at selection-screen on event can be used.

The AT SELECTION-SCREEN ON event is utilized for input validation.

Q37. What Is The Distinction Between Data Element And Domain?

In SAP ABAP, a data element is a combination of a domain and a brief description. On the other hand, a domain is made up of a datatype and its corresponding length.

The domain in SAP ABAP consists of technical attributes such as data type and size, while the data element includes both technical attributes and semantic attributes like field description.

The concept of an internal table with a header line means that the name of the work area and the internal table are the same. On the other hand, an internal table without a header line means that the name of the work area and the internal table are different.

It is not necessary to create a work area for an internal table with a header. However, it is not recommended as it can confuse the user since both the work area and internal table will have the same names.

Q39. What is the Initial Event Triggered in an SAP ABAP Report?

Ans: Load of program is the first triggering event in the classical reports, where as abaper point of view initialization is the first triggering event.

The LOAD-OF-PROGRAM event is internally activated in the SAP system, followed by the triggering of the INITIALIZATION event.

What Does Binary Search Mean?

Binary search is an efficient searching technique that divides the data into two parts and starts searching from one of those parts. Unlike linear search, where data is searched sequentially from top to bottom, binary search offers a more optimized approach.

Binary search is a more efficient method of retrieving data from an internal table compared to linear search. It is faster and provides better performance in finding the desired information.

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How to Fit 14 Columns in a Single Page While Printing

In SAP ABAP, the execution of a report does not necessarily require any specific events. However, if we include the “start-of-selection” event in our code, it is not mandatory to use the “end-of-selection” event. The purpose of using the “end-of-selection” event is to ensure that certain output is still executed even if an exception occurs and causes the program to skip the “start-of-selection” event.

In the report program, there is no required event that needs to be written. However, if we do not explicitly specify any events, the system will automatically start with the “start of selection” event. It is recommended to use the “end-of-selection” event when performing database selections in order to follow good programming practices.

What Does Transaction Code SM 31 Stand for?

SM30 – Invoke the view maintenance and views functionality for managing SAP tables.

Q44. What Are Text Elements in SAP ABAP?

Text elements are a convenient way to manage program texts in various languages, making it easier to maintain them. They are particularly useful for handling list headers and selection texts within programs.

What is the meaning of Check Table and Value Table?

The check table operates at the level of a specific table, while the value table functions at the level of a domain.

A check table refers to a primary table that is created with a specific set of valid values.

The value table offers a list of values that can be used as a check table when establishing a foreign key relationship.

How Many Types of Standard Internal Tables Exist?

STANDARD TABLE: The key is, by default, set to NON-UNIQUE. You may not use the UNIQUE addition.

SORTED TABLE: Unlike standard tables, sorted table have no default setting for the uniqueness attribute. If you do not specify either UNIQUE or NON-UNIQUE, the system defines a generic table type, where uniqueness is irrelevant. You can use generic types to specify the type of generic subroutine parameters.

HASHED TABLE: Hashed tables have no default setting. You must use the UNIQUE addition with hashed tables. You may not use NON-UNIQUE.

What Does Refreshing in Internal Table Mean?

Ans: ‘Refresh’ is the keyword which clears the contents of an internal table body.

What Differentiates Collect from Sum in SAP ABAP?

COLLECT enables the creation of distinct or condensed datasets. Initially, the system attempts to locate a table entry that matches the key values provided. These key values can be obtained from either the header line of an internal table called itab or from a specifically designated work area.

In case the system detects a record, any numeric fields that are not included in the table key (refer to ABAP number types) will be combined with the overall sum of existing records. Conversely, if no record is found, the system will generate a fresh entry instead.

Q49. How Can Tables be Created?

1. Approach from the top

2. Approach from the bottom

Q50. What Does a Stacked List Indicate?

The stacked list, also known as the secondary list, is displayed on the entire screen by default if we do not specify its coordinates within the command window.

When is the appropriate moment to employ the “GET CURSOR” command in interactive lists?

The GET CURSOR command is used when there is insufficient hidden information to track the chosen line.

Q52. What is the Description of Start-of-Selection and End-of-Selection in SAP ABAP?

The beginning and end of the main processing logic in ABAP/4 applications are handled automatically. The statements from START-OF-SELECTION to END-OF-SELECTION are executed without the need for an explicit END-OF-SELECTION statement. By default, every procedural statement in ABAP applications relies on the START-OF-SELECTION event.

: SAP ABAP ALV REPORTS Interview Questions and Answers

What does SAP event key mean?

In Inventory Management, a key is provided to distinguish between transactions and events. This helps in identifying various activities such as goods movements and physical inventory transactions.

What does the event table refer to?

The event table is a user-created database table typically located in the same schema as the application table it serves. Its purpose is to store information about events that occur on the application table. The event table not only describes the type of change made to the application table but also includes an identifier for the specific row that was modified. This allows for efficient tracking and retrieval of relevant data related to changes made within the application.

In SAP ABAP, Alv Report Events play a crucial role in enhancing reporting capabilities and providing real-time updates on data changes. These events are triggered when certain actions or modifications occur within an ALV (ABAP List Viewer) report.

ALV reports are widely used in SAP systems to display large volumes of data in a structured format with various functionalities such as sorting, filtering, and aggregating. With Alv Report Events, developers can further enhance these reports by incorporating dynamic features based on user interactions or backend operations.

For example, when a user selects a particular row or column in an ALV report, an event can be triggered to perform additional actions like displaying detailed information about that selection or executing custom logic based on it. Similarly, if there are any updates made to underlying data while viewing an ALV report, Alv Report Events can help refresh and reflect those changes instantly without requiring manual intervention.

By leveraging Alv Report Events effectively, developers can create interactive and responsive reports tailored to specific business requirements. These events enable seamless integration between frontend user interactions and backend processes, resulting in enhanced usability and improved decision-making capabilities for end-users.

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What is the function of the event table?

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