ABAP Keyword Documentation

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### Example: Export and Import Data Cluster

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPIMPORT_INTERNAL.html

Demonstrates exporting a data cluster to a database table and then importing it back. This example shows the setup for using IMPORT with a subroutine-based import.

```ABAP
TABLES demo_indx_table.
DATA demo_indx_tab TYPE TABLE OF demo_indx_table.
SELECT * 
FROM sflight
INTO TABLE @DATA(sflight_tab).
EXPORT sflight_tab TO DATABASE demo_indx_table(fl) ID 'FLIGHTS'
USING demo_indx_table_export.
...
demo_indx_table-srtf2 = 0.
IMPORT sflight_tab FROM DATABASE demo_indx_table(fl) ID 'FLIGHTS'
USING demo_indx_table_import.
```

--------------------------------

### Example: Pushbutton, Parameter, and Comment in a Line

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPSELECTION-SCREEN_LINE.html

This example demonstrates placing a pushbutton, a parameter, and a comment on the same line of the selection screen. It also shows how to initialize these elements.

```ABAP
SELECTION-SCREEN: BEGIN OF LINE,
PUSHBUTTON 2(10) push USER-COMMAND fcode,
POSITION 16.
PARAMETERS para TYPE c LENGTH 20.
SELECTION-SCREEN: COMMENT 40(40) text,
END OF LINE.
INITIALIZATION.
push = 'Push'.
text = '<--- Fill field, then push button!'.
```

--------------------------------

### Dynamic GET PERMISSIONS Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPGET_PERMISSIONS_DYN.html

This example demonstrates the dynamic form of the GET PERMISSIONS statement for checking access restrictions on data fields of a managed RAP BO. It includes setup for permission keys, requests, and results.

```abap
"Root entity components for perm_tab. 
DATA: lt_perm_key_root TYPE TABLE FOR
PERMISSIONS KEY demo_managed_root_3,
ls_perm_req_root TYPE STRUCTURE FOR
PERMISSIONS REQUEST demo_managed_root_3,
ls_perm_res_root TYPE STRUCTURE FOR
PERMISSIONS RESULT demo_managed_root_3.
lt_perm_key_root = VALUE #( ( %key-key_field = 5 )
( %key-key_field = 6 ) ).
ls_perm_req_root = VALUE #(
%field-data_field1_root = if_abap_behv=>mk-on
%field-data_field2_root = if_abap_behv=>mk-on
).
ls_perm_res_root = VALUE #( ).
```

--------------------------------

### Program Calls: Filling the Selection Screen Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPSUBMIT_INTERFACE.html

This example demonstrates how to call a program and fill its selection screen using various additions of the SUBMIT statement. It illustrates passing values via tables and individual parameters.

```abap
SUBMIT report
  USING SELECTION-SCREEN 1000
  VIA SELECTION-SCREEN
  WITH SELECTION-TABLE seltab
  WITH p1 = 'value1'
  WITH p2 BETWEEN 'low' AND 'high'
  WITH selcrit IN rtab.
```

--------------------------------

### ABAP GET DATASET Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPGET_DATASET.html

This example demonstrates checking if a dataset was opened with the FILTER addition before determining its position using GET DATASET. It retrieves attributes and checks the fixed indicator for filter.

```ABAP
DATA: dset TYPE string VALUE 'test.dat',
pos TYPE i.
OPEN DATASET dset FOR INPUT IN BINARY MODE 
FILTER 'uncompress'
MESSAGE FINAL(msg).
...
GET DATASET dset ATTRIBUTES FINAL(attr).
IF attr-fixed-indicator-filter <> 'X'.
GET DATASET dset POSITION pos.
ELSE.
...
ENDIF.
```

--------------------------------

### Example of STOP in GET sbook event

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPSTOP.html

This example demonstrates terminating the GET sbook event block after a certain number of postings and branching to END-OF-SELECTION. It's intended for use in executable programs within specific event blocks.

```ABAP
FINAL(out) = cl_demo_output=>new( ).
nODES: sflight,
sbook.
DATA: bookings TYPE i,
max TYPE i VALUE 100.
GET sflight.
out->next_section( |{ sflight-carrid } | &&
|{ sflight-connid } | &&
|{ sflight-fldate }| ).
GET sbook.
bookings += 1.
out->write( |{ sbook-bookid } | &&

```

--------------------------------

### Singleton Object Instantiation and Method Call

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENSTATIC_CLASS_SINGLETON_GUIDL.html

Demonstrates the compact syntax for retrieving a singleton instance and calling an instance method, omitting explicit object reference variables and factory calls.

```abap
cl_singleton=>get_instance( )->do_something( ).
```

--------------------------------

### ALV List Output Example (Good Practice)

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENLIST_GUIDL.html

Demonstrates the use of ALV lists, which are recommended as a replacement for classic lists in applications still using classic dynpros. This example produces ALV lists with the same content and functions as classic lists.

```ABAP
REPORT DEMO_ALV_REPORTING.
```

--------------------------------

### ABAP GET PERMISSIONS Long Form Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPGET_PERMISSIONS_LONG.html

Demonstrates the long form of the GET PERMISSIONS statement for checking access restrictions on specific data fields in a managed RAP BO. This example targets both root and child entities.

```ABAP
GET PERMISSIONS ONLY INSTANCE FEATURES OF demo_managed_root_3 
ENTITY demo_managed_root_3 
FROM VALUE #( ( %key-key_field = 3 )
( %key-key_field = 4 ) )
REQUEST VALUE #(
%field-data_field1_root = if_abap_behv=>mk-on
%field-data_field2_root = if_abap_behv=>mk-on )
RESULT FINAL(result2)
ENTITY child 
FROM VALUE #( ( %key-key_field = 3 )
( %key-key_field = 4 ) )
REQUEST VALUE #(
%field-data_field1_child = if_abap_behv=>mk-on
%field-data_field2_child = if_abap_behv=>mk-on )
RESULT FINAL(result3)
FAILED FINAL(failed2)
```

--------------------------------

### Multiline Mode Example with PCRE

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENREGEX_POSIX_PCRE_IMPROVE.html

Compares matching at the beginning of a string versus the beginning of lines using PCRE. The first example matches only the start of the entire string, while the second uses `(*LF)(?m)^` to match the start of each line after a line feed.

```ABAP
FINAL(result1) = replace( val  = |xxx\nyyy\nzzz| 
pcre = `^`
with = `_`
occ = 0 ).
" --> _xxx\nyyy\nzzz 
```

```ABAP
FINAL(result2) = replace( val  = |xxx\nyyy\nzzz| 
pcre = `(*LF)(?m)^`
with = `_`
occ = 0 ).
" --> _xxx\n_yyy\n_zzz
```

--------------------------------

### ABAP FORMAT INPUT Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPFORMAT.html

Demonstrates how to make a field ready for input and evaluate user input using AT LINE-SELECTION. Ensure SET BLANK LINES ON is used if input fields might be blank.

```ABAP
DATA: input_field TYPE c LENGTH 100,
line_num TYPE i.
START-OF-SELECTION.
WRITE 'Input text:'.
SET BLANK LINES ON.
FORMAT INPUT.
WRITE / input_field.
FORMAT INPUT OFF.
WRITE / '>>> OK <<<' COLOR 5 HOTSPOT.
AT LINE-SELECTION.
IF sy-lisel = '>>> OK <<<'.
line_num = sy-lilli - 1.
READ LINE line_num FIELD VALUE input_field.
WRITE: 'The input was:',
input_field.
```

--------------------------------

### Example: Filling an Internal Table with WHILE

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPWHILE.html

Demonstrates how to fill an internal table with 100 lines using a WHILE loop. The loop continues until the table reaches the desired size. Note that FOR expressions can often provide a more elegant solution for such tasks.

```ABAP
DATA itab TYPE TABLE OF i.
WHILE lines( itab ) < 100.
  itab = VALUE #( BASE itab ( sy-index ) ).
ENDWHILE.
```

--------------------------------

### CDS Hierarchy with START WHERE

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENCDS_F1_DEFINE_HIERARCHY.html

Defines a parent-child hierarchy with a START WHERE condition to filter the initial nodes. This example starts the hierarchy where the parent is initial, effectively selecting root nodes.

```abap
define hierarchy DEMO_CDS_HIERA_START_WHERE
as parent child hierarchy(
source DEMO_CDS_SIMPLE_TREE_SOURCE
child to parent association _tree
start where
parent is initial
siblings order by
id ascending
)
{
id,
parent,
name
}
```

--------------------------------

### CDS Hierarchy with START WHERE BETWEEN

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/abencds_f1_define_hierarchy.html

Defines a parent-child hierarchy with parameters for start and end values, using a BETWEEN operator in the START WHERE clause. This example demonstrates filtering root nodes based on an ID range.

```cds
define hierarchy DEMO_CDS_PARENT_CHILD_STRTWHR
with parameters
p_from : abap.char(2),
p_to : abap.char(2)
as parent child hierarchy(
source
DEMO_CDS_PARENT_CHILD_SOURCE
child to parent association _relat
start where
id between :p_from and :p_to
siblings order by
id
multiple parents allowed
cycles breakup
)
{

```

--------------------------------

### Main Execution Entry Point

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENHTML_BROWSER_ABEXA.html

This is the starting point for the ABAP program execution, calling the main demo method.

```ABAP
START-OF-SELECTION.
demo=>main( ).
```

--------------------------------

### HIERARCHY_DESCENDANTS Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENSELECT_HIERARCHY_NODE_NAVIS.html

Selects all descendant nodes and the start nodes themselves from a specified SQL hierarchy. Includes hierarchy columns and distance to the start node.

```ABAP
FINAL(id) = 6.
SELECT FROM HIERARCHY_DESCENDANTS(
SOURCE HIERARCHY(
SOURCE demo_cds_simple_tree_source 
CHILD TO PARENT ASSOCIATION _tree 
START WHERE id = 1
SIBLINGS ORDER BY id ASCENDING )
START WHERE id = @id ) 
FIELDS id,
parent_id,
hierarchy_rank,
hierarchy_level,
hierarchy_tree_size,
hierarchy_distance 
INTO TABLE @FINAL(descendants).
```

--------------------------------

### Example: Inserting Index Lines for Archiving

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPPRINT-CONTROL.html

This example demonstrates inserting index lines for archiving purposes in a list of square numbers. It defines DKEY and DAIN lines and uses PRINT-CONTROL to add them to the spool list, enabling searches in the archived list.

```ABAP
PARAMETERS number TYPE i.
DATA: index TYPE i,
square TYPE decfloat16,
numb TYPE i,
num TYPE c LENGTH 4,
dkey TYPE c LENGTH 100,
dain TYPE c LENGTH 100.
dkey = 'DKEYIndex'.
dkey+44 = '0'.
dkey+47 = '3'.
PRINT-CONTROL INDEX-LINE dkey.
CLEAR dkey.
```

--------------------------------

### Check if File is Open with GET DATASET

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPGET_DATASET.html

Use GET DATASET within a TRY-CATCH block to determine if a file is open. This example checks for the CX_SY_FILE_OPEN_MODE exception.

```ABAP
FINAL(dset) = 'test.dat'.
TRY.
GET DATASET dset.
CATCH cx_sy_file_open_mode.
...
```

--------------------------------

### Good Example: Correct INITIAL SIZE for Nested Tables

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENINITIAL_MEMORY_REQU_GUIDL.html

This example demonstrates the correct usage of the INITIAL SIZE addition for nested tables, applying it to the inner table to optimize memory allocation.

```ABAP
TYPES small_table TYPE STANDARD TABLE OF ...
WITH NON-UNIQUE KEY ...
INITIAL SIZE 4.
TYPES: BEGIN OF line_structure,
... 
int_table TYPE small_table,
...
END OF line_structure,
big_table TYPE SORTED TABLE OF line_structure 
WITH UNIQUE KEY ...
```

--------------------------------

### Get File Pointer Position with GET DATASET POSITION

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPGET_DATASET.html

This example demonstrates how to get the current file pointer position after writing to a file. The position is stored in the 'pos' variable and used later to reposition the file pointer before reading.

```ABAP
DATA msg TYPE string.
DATA: file TYPE string VALUE 'test.dat',
text TYPE string.
OPEN DATASET file FOR OUTPUT IN TEXT MODE 
ENCODING DEFAULT
WITH SMART LINEFEED 
MESSAGE msg.
TRANSFER '1234567890' TO file.
GET DATASET file POSITION FINAL(pos).
TRANSFER 'ABCDEFGHIJ' TO file.
CLOSE DATASET file.
OPEN DATASET file FOR INPUT IN TEXT MODE 
ENCODING DEFAULT
```

--------------------------------

### Compress and Decompress Text Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENCL_ABAP_GZIP.html

This example demonstrates how to compress a text string using `CL_ABAP_GZIP=>compress_text` and then decompress it back using `CL_ABAP_GZIP=>decompress_text`.

```APIDOC
## Compress and Decompress Text

### Description
This example demonstrates the compression and decompression of text using the `CL_ABAP_GZIP` class.

### Method
`CL_ABAP_GZIP=>compress_text` and `CL_ABAP_GZIP=>decompress_text`

### Example
```abap
DATA zip TYPE xstring.
cl_abap_gzip=>compress_text(
  EXPORTING text_in  = `Hello!`
  IMPORTING gzip_out = zip ).

DATA txt TYPE string.
cl_abap_gzip=>decompress_text(
  EXPORTING gzip_in  = zip 
  IMPORTING text_out = txt ).

ASSERT txt = `Hello!`.
```
```

--------------------------------

### CDS Hierarchy without START WHERE

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENCDS_F1_DEFINE_HIERARCHY.html

Defines a parent-child hierarchy using a source CDS view. This example does not specify a START WHERE condition, meaning all data from the source is considered.

```abap
define hierarchy DEMO_CDS_HIERA_NO_START_WHERE
as parent child hierarchy(
source DEMO_CDS_SIMPLE_TREE_SOURCE
child to parent association _tree
siblings order by
id ascending
)
{
id,
parent,
name
}
```

--------------------------------

### Example: Opening, Reading, and Deleting a File in ABAP

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPDELETE_DATASET.html

This example demonstrates opening a file for writing, closing it, then opening it for reading, closing it again, and finally deleting the file using DELETE DATASET. It includes basic error handling with the MESSAGE addition.

```abap
DATA msg TYPE string.
FINAL(dset) = 'test.dat'.
OPEN DATASET dset FOR OUTPUT IN BINARY MODE MESSAGE msg.
...
CLOSE DATASET dset.
...
OPEN DATASET dset FOR INPUT IN BINARY MODE MESSAGE msg.
...
CLOSE DATASET dset.
DELETE DATASET dset.
```

--------------------------------

### ABAP Class Definition for DELETE Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENDELETE_ITAB_USING_KEY_ABEXA.html

Defines a class that inherits from a base demo class and includes a method for demonstrating DELETE operations. This setup is for example purposes only.

```abap
CLASS cl_demo_delete_table_using_key DEFINITION
INHERITING FROM cl_demo_classrun 
PUBLIC
CREATE PUBLIC .
PUBLIC SECTION.
METHODS main REDEFINITION.
PRIVATE SECTION.
DATA: BEGIN OF tline,
col1 TYPE i,
col2 TYPE i,
END OF tline,
itab LIKE HASHED TABLE
OF tline 
WITH UNIQUE KEY primary_key 
COMPONENTS col1 
WITH NON-UNIQUE SORTED KEY secondary_key 
COMPONENTS col2,
jtab LIKE SORTED TABLE
OF tline 

```

--------------------------------

### ABAP REJECT Statement Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPREJECT.html

This example demonstrates how to use the REJECT statement to exit the GET sbook event block and branch to the GET sflight event. It requires the program to be linked with the logical database F1S. The REJECT statement is used after the interface work area sbook has been processed for the first time.

```ABAP
FINAL(out) = cl_demo_output=>new( ).
NODES: sflight,
 sbook.
GET sflight.
out->next_section(
|Carrid: { sflight-carrid } |
|Connid: { sflight-connid } |
|Fldate: { sflight-fldate }| ).
GET sbook.
out->write_text(
|Bookid: { sbook-bookid }| ).
REJECT 'SFLIGHT'.
```

--------------------------------

### Recommended Modification with USING CLIENT

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPIUMD_CLIENT.html

This example demonstrates the recommended approach for modifying a row in a specific client using the `USING CLIENT` addition.

```ABAP
MODIFY demo_expressions USING CLIENT '800'
FROM @( VALUE #( id = 'X' num1 = '555' ) ).
```

--------------------------------

### Example: Constructing Class Instance for Method Parameter

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENNEW_CONSTRUCTOR_PARAMS_CLASS.html

Illustrates the construction of an instance of class c1 using the NEW expression, intended as an input parameter for method m2 of class c2.

```ABAP
CLASS c1 DEFINITION.
PUBLIC SECTION.
METHODS constructor IMPORTING p1 TYPE i p2 TYPE i.
ENDCLASS.
CLASS c1 IMPLEMENTATION.
METHOD constructor.
...
ENDMETHOD.
ENDCLASS.
CLASS c2 DEFINITION.
PUBLIC SECTION.
CLASS-METHODS m2 IMPORTING oref TYPE REF TO c1.
ENDCLASS.
```

--------------------------------

### ABAP Class Implementation for COMMIT ENTITIES Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENCOMMIT_ENTITIES_SH_LO_ABEXA.html

Implements the main method of the demo class for COMMIT ENTITIES examples. It starts a section to demonstrate different COMMIT variants.

```abap
CLASS cl_demo_rap_eml_commit_1 IMPLEMENTATION.
METHOD main.
out->begin_section(
`COMMIT Variants`
)->begin_section(
`COMMIT Variant: COMMIT ENTITIES.`

```

--------------------------------

### Example: Writing and Reading Binary XML Data

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPOPEN_DATASET.html

Demonstrates opening a file for writing binary XML data, transferring it, closing the file, then opening for reading, and finally deleting the file. This example utilizes transformations to convert internal table data to asXML format.

```ABAP
FINAL(out) = cl_demo_output=>new( ).
SELECT * 
FROM scarr 
INTO TABLE @DATA(itab).
CALL TRANSFORMATION id SOURCE scarr = itab 
RESULT XML DATA(xml).
DATA msg TYPE string.
FINAL(dset) = 'scarr.dat'.
OPEN DATASET dset FOR OUTPUT IN BINARY MODE MESSAGE msg.
TRANSFER xml TO dset.
CLOSE DATASET dset.
...
OPEN DATASET dset FOR INPUT IN BINARY MODE MESSAGE msg.
READ DATASET dset INTO DATA(xml_read).
CLOSE DATASET dset.
DELETE DATASET dset.
```

--------------------------------

### ABAP Class for Simple Transformation Example

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENABAP_ST_JSON_TABLE_ATTR_ABEXA.html

Defines an ABAP class that inherits from CL_DEMO_CLASSRUN and includes a main method to demonstrate the Simple Transformation. This serves as the setup for the transformation example.

```ABAP
CLASS cl_demo_st_json_table_attrbts DEFINITION
INHERITING FROM cl_demo_classrun 
PUBLIC
CREATE PUBLIC.
PUBLIC SECTION.
METHODS main REDEFINITION.
ENDCLASS.

CLASS cl_demo_st_json_table_attrbts IMPLEMENTATION.
METHOD main.
"Internal table as source of transformation 
out->begin_section( 'Internal Table' ).
DATA: BEGIN OF carrier_wa,
      carrname TYPE scarr-carrname,
      url TYPE scarr-url,
      END OF carrier_wa,
      carrier_tab LIKE TABLE OF carrier_wa.
SELECT * 
FROM scarr 
INTO TABLE carrier_tab.
out->display( carrier_tab ).

"Simple Transformation
out->begin_section( 'Simple Transformation' ).
CALL TRANSFORMATION demo_st_json_table_attributes
( IN carrier_tab = carrier_tab
) RESULT XML out->get_cdata( ).
```

--------------------------------

### Example: Storing and Reading Data Cluster Directory

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPIMPORT_DIRECTORY.html

This example demonstrates storing three data objects (a flat data object, an internal table, and a structure) into a database cluster and then reading the directory of stored objects into the 'itab' internal table. The 'itab' will then contain metadata about the stored objects.

```abap
FINAL(out) = cl_demo_output=>new( ).
DATA: f1 TYPE decfloat16,
      f2 TYPE TABLE OF i,
      f3 TYPE spfli.
DATA itab TYPE STANDARD TABLE OF cdir.
f2 = VALUE #( FOR j = 1 UNTIL j > 10 ( j ) ).
EXPORT par1 = f1 
       par2 = f2 
       par3 = f3 TO DATABASE demo_indx_blob(hk) ID 'HK'.
IMPORT DIRECTORY INTO itab FROM DATABASE demo_indx_blob(hk) ID 'HK'.
```

--------------------------------

### Implement Automatically Started ABAP Daemon Class

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENABAP_AUTO_DAEMON_ABEXA.html

Implements the methods for the automatically started ABAP daemon class, including the main execution logic and the setup and teardown procedures.

```ABAP
CLASS cl_demo_abap_auto_daemon IMPLEMENTATION.
METHOD main.
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```

--------------------------------

### ABAP Table Comprehension with STEP and USING KEY

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENTABLE_CMPRHNSNS_STEP_ABEXA.html

Demonstrates how step size and processing order are utilized in table comprehensions. The examples illustrate reading table lines in ascending/descending order with specific step sizes and starting points.

```ABAP
CLASS cl_demo_table_comprh_step DEFINITION
INHERITING FROM cl_demo_classrun 
PUBLIC
CREATE PUBLIC.
PUBLIC SECTION.
METHODS main REDEFINITION.
ENDCLASS.
CLASS cl_demo_table_comprh_step IMPLEMENTATION.
METHOD main.
TYPES: BEGIN OF line,
tabix TYPE sy-tabix,
value TYPE i,
END OF line.
DATA output TYPE TABLE OF line WITH EMPTY KEY.
out->write_doc(
`An internal table itab is declared and filled as follows:`

```

--------------------------------

### Recommended START-OF-SELECTION Usage in ABAP

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPSTART-OF-SELECTION.html

This example demonstrates the recommended practice of calling a dedicated method from the START-OF-SELECTION event block instead of implementing functionality directly. This promotes modularity and maintainability.

```ABAP
REPORT ...
CLASS cls DEFINITION.
PUBLIC SECTION.
CLASS-METHODS main.
ENDCLASS.
CLASS cls IMPLEMENTATION.
METHOD main.
...
ENDMETHOD.
ENDCLASS.
START-OF-SELECTION.
cls=>main( ).
```

--------------------------------

### ABAP CDS Hierarchy with START WHERE BETWEEN

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENCDS_F1_DEFINE_HIERARCHY.html

Defines a parent-child hierarchy with a START WHERE clause using the BETWEEN operator and parameters. This example demonstrates how to specify a range for the root nodes based on the 'id' field.

```abap
define hierarchy DEMO_CDS_PARENT_CHILD_STRTWHR
with parameters
p_from : abap.char(2),
p_to : abap.char(2)
as parent child hierarchy(
source
DEMO_CDS_PARENT_CHILD_SOURCE
child to parent association _relat
start where
id between :p_from and :p_to
siblings order by
id
multiple parents allowed
cycles breakup
)
{
}
```

--------------------------------

### Example: Importing Data with Code Page and Byte Order Retrieval

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPIMPORT_CONVERSION.html

Demonstrates importing data using `CHAR-TO-HEX MODE` and retrieving the code page and byte order. This example is system-dependent and intended for temporary use.

```abap
DATA: BEGIN OF f1,
col1 TYPE c LENGTH 10 VALUE '1234567890',
col2 TYPE c LENGTH 10 VALUE '1234567890',
END OF f1.
DATA: BEGIN OF f2,
col1 TYPE c LENGTH 10,
col2 TYPE x LENGTH 20,
END OF f2.
DATA: cp TYPE string,
en TYPE abap_endian.
EXPORT para = f1 TO DATABASE demo_indx_blob(hk) ID 'HK'.
IMPORT col1 = f2-col1 col2 = f2-col2 cp = cp en = en FROM DATABASE demo_indx_blob(hk) ID 'HK'.
```

--------------------------------

### ABAP GET PERMISSIONS Example: Checking Field Access Restrictions

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABAPGET_PERMISSIONS_SHORT.html

This example demonstrates the short form of the GET PERMISSIONS statement to check access restrictions for specific data fields of an entity instance. It utilizes the `IF_ABAP_BEHV=>MK-ON` constant to enable checks for 'data_field1_root' and 'data_field2_root'. The results are stored in the 'result', 'failed', and 'reported' structures.

```ABAP
DATA: request TYPE STRUCTURE FOR
PERMISSIONS REQUEST demo_managed_root_3.
request-%field-data_field1_root = if_abap_behv=>mk-on.
request-%field-data_field2_root = if_abap_behv=>mk-on.
GET PERMISSIONS ONLY INSTANCE FEATURES ENTITY demo_managed_root_3 
FROM VALUE #( ( %key-key_field = 1 )
( %key-key_field = 2 ) )
REQUEST request 
RESULT FINAL(result)
FAILED FINAL(failed)
REPORTED FINAL(reported).
```

--------------------------------

### Example: Assigning Values with CREATE_WITH_VALUE

Source: https://help.sap.com/doc/abapdocu_latest_index_htm/latest/en-US/ABENCL_ABAP_CORRESPONDING_3.html

This example demonstrates how to use `CREATE_WITH_VALUE` to assign specific values to components of a target structure and copy values from a source structure.

```ABAP
FINAL(out) = cl_demo_output=>new( ).
DATA:
BEGIN OF struct1,
a1 TYPE string VALUE 'a1',
a2 TYPE string VALUE 'a2',
a3 TYPE string VALUE ' ',
a4 TYPE string VALUE 'a4',
END OF struct1,
BEGIN OF struct2,
b1 TYPE string VALUE 'b1',
b2 TYPE string VALUE 'b2',
b3 TYPE string VALUE 'b3',
b4 TYPE string VALUE 'b4',
END OF struct2.

DATA(mapper) = cl_abap_corresponding=>create_with_value(
  source      = struct1
  destination = struct2
  mapping     = VALUE #( (
    srcname = ``
    dstname = `b1`
    kind    = cl_abap_corresponding=>mapping_value
    value   = REF #( struct1-a1 ) 
  ) (
    srcname = ``
    dstname = `b2`
    kind    = cl_abap_corresponding=>mapping_value
    value   = `xxx`
  ) (
    srcname = ``
    dstname = `b3`
    kind    = cl_abap_corresponding=>mapping_value
    value   = `yyy`
  ) (
    srcname = `a4`
    dstname = `b4`
    kind    = cl_abap_corresponding=>mapping_value
    value   = REF #( struct1-a4 )
  ) ) ).

mapper->execute( ).

out->display( struct2 ).
```
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