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ABAP Syntax Starting with “L”


Home »ABAP Syntax » ABAP Syntax Starting with “L”


Syntax Starting with “L”

LEAVE for Screens

Leaves a screen.

Syntax

LEAVE SCREEN.

Stops processing the current screen and calls the subsequent screen. The next screen can either be defined statically in the screen attributes or set dynamically using the SET SCREEN statement.




Syntax

LEAVE TO SCREEN <scr>.

Stops processing the current screen and calls the dynamically-defined subsequent screen <scr>*.

LEAVE for Lists During Screen Processing

Switches between screen and list processing.

Syntax

LEAVE TO LIST-PROCESSING [AND RETURN TO SCREEN <scr>].

Allows you to create and display a list while processing a series of screens. The addition allows you to specify the next screen (to which you return after the list has been displayed). If you do not use the addition, screen processing resumes with the PBO of the current screen

Syntax

LEAVE LIST-PROCESSING.

Allows you to switch back explicitly from list processing to screen processing.

LEAVE for Programs

Leaves an ABAP program.

Syntax

LEAVE [PROGRAM].

Stops processing the current program and returns to the point from which it was called.

Syntax

LEAVE TO TRANSACTION <tcod> [AND SKIP FIRST SCREEN].

This statement ends processing of the current program and starts a new transaction, <tcod>. The addition allows you to skip the initial screen of the transaction.

LOAD-OF-PROGRAM

Event keywords for defining event blocks for a program constructor.

Syntax

LOAD-OF-PROGRAM.

When an ABAP program is loaded in an internal session, the runtime environment triggers the LOAD-OF-PROGRAM event, and the corresponding event block is executed.

LOCAL

Protects global data against changes.

Syntax

LOCAL <f>.

Only occurs in subroutines. When the subroutine starts, the value of <f> is stored temporarily, and restored to the variable <f> at the end of the subroutine.

LOOP Through Extracts

Introduces a loop through an extract dataset.

Syntax

LOOP.

Loops through an extract dataset. The loop ends with an ENDLOOP statement. When the LOOP statement is executed, the system stops creating the extract dataset of the program, and starts a loop through the entries in the dataset. One record from the extract dataset is read in each loop pass. The values of the extracted fields are placed in the corresponding output fields of the field group within the loop.

LOOP THROUGH internal tables

Starts a loop through an extract dataset.

Syntax

LOOP AT <itab> INTO <wa> WHERE <logexp>.

LOOP AT <itab> ASSIGNING <FS> WHERE <logexp>.

LOOP AT <itab> REFERENCE INTO <dref> WHERE <logexp>.

LOOP AT <itab> TRANSPORTING NO FIELDS WHERE <logexp>.

Loop through any Internal Table The loop ends with an ENDLOOP statement. If the logical expression <logexp> is true, each loop pass either assigns the current line content to the work area <wa>; assigns the current line to a field symbol <FS>; creates a reference to the current line by <dref>; or does not assign the line content at all. The first operand in each part of <logexp> must be a component of the internal table. Pointed brackets are part of the syntax for field symbol names.

With index tables, you can use the additions FROM <n> and TO <n> to restrict the lines that are read by specifying an index range.

LOOP Through Screen Fields

Starts a loop through the table SCREEN.

Syntax

LOOP AT SCREEN…

Similar to a loop through an internal table. The system table SCREEN contains the names and attributes of all of the fields on the current screen.

A D V E R T I S E M E N T

A D V E R T I S E M E N T

S A P - R E S O U R C E S


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