ABAP Select data from SAP table RFDKLI20_S_ALV into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFDKLI20_S_ALV table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to RFDKLI20_S_ALV. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the RFDKLI20_S_ALV table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_RFDKLI20_S_ALV TYPE STANDARD TABLE OF RFDKLI20_S_ALV,
      WA_RFDKLI20_S_ALV TYPE RFDKLI20_S_ALV,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <RFDKLI20_S_ALV> TYPE RFDKLI20_S_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFDKLI20_S_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFDKLI20_S_ALV
  INTO TABLE IT_RFDKLI20_S_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFDKLI20_S_ALV
*  INTO TABLE @DATA(IT_RFDKLI20_S_ALV2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_RFDKLI20_S_ALV INDEX 1 INTO DATA(WA_RFDKLI20_S_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFDKLI20_S_ALV ASSIGNING <RFDKLI20_S_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFDKLI20_S_ALV>-KUNNR = 1.
<RFDKLI20_S_ALV>-KKBER = 1.
<RFDKLI20_S_ALV>-KNKLI = 1.
<RFDKLI20_S_ALV>-SKFOR = 1.
<RFDKLI20_S_ALV>-OLDSKFOR = 1.

ENDLOOP.

LOOP AT IT_RFDKLI20_S_ALV INTO WA_RFDKLI20_S_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFDKLI20_S_ALV-SSOBL, sy-vline,
  WA_RFDKLI20_S_ALV-OLDSSOBL, sy-vline,
  WA_RFDKLI20_S_ALV-ABSBT, sy-vline,
  WA_RFDKLI20_S_ALV-OLDABSBT, sy-vline,
  WA_RFDKLI20_S_ALV-WAERS, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_RFDKLI20_S_ALV you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_RFDKLI20_S_ALV TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_RFDKLI20_S_ALV INTO WA_RFDKLI20_S_ALV.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI20_S_ALV-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI20_S_ALV-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNKLI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI20_S_ALV-KNKLI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI20_S_ALV-KNKLI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SKFOR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI20_S_ALV-SKFOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI20_S_ALV-SKFOR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field OLDSKFOR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI20_S_ALV-OLDSKFOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI20_S_ALV-OLDSKFOR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SSOBL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI20_S_ALV-SSOBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI20_S_ALV-SSOBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field OLDSSOBL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI20_S_ALV-OLDSSOBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI20_S_ALV-OLDSSOBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field ABSBT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI20_S_ALV-ABSBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI20_S_ALV-ABSBT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field OLDABSBT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI20_S_ALV-OLDABSBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI20_S_ALV-OLDABSBT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RFDKLI20_S_ALV_STR, 
KUNNR TYPE STRING,
KKBER TYPE STRING,
KNKLI TYPE STRING,
SKFOR TYPE STRING,
OLDSKFOR TYPE STRING,
SSOBL TYPE STRING,
OLDSSOBL TYPE STRING,
ABSBT TYPE STRING,
OLDABSBT TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFDKLI20_S_ALV_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_RFDKLI20_S_ALV_STR-KUNNR sy-vline 
WA_RFDKLI20_S_ALV_STR-KKBER sy-vline 
WA_RFDKLI20_S_ALV_STR-KNKLI sy-vline 
WA_RFDKLI20_S_ALV_STR-SKFOR sy-vline 
WA_RFDKLI20_S_ALV_STR-OLDSKFOR sy-vline 
WA_RFDKLI20_S_ALV_STR-SSOBL sy-vline 
WA_RFDKLI20_S_ALV_STR-OLDSSOBL sy-vline 
WA_RFDKLI20_S_ALV_STR-ABSBT sy-vline 
WA_RFDKLI20_S_ALV_STR-OLDABSBT sy-vline 
WA_RFDKLI20_S_ALV_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.