ABAP Select data from SAP table AFRC_S_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AFRC_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 AFRC_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 AFRC_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_AFRC_S_ALV TYPE STANDARD TABLE OF AFRC_S_ALV,
      WA_AFRC_S_ALV TYPE AFRC_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: <AFRC_S_ALV> TYPE AFRC_S_ALV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFRC_S_ALV
*  INTO TABLE @DATA(IT_AFRC_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_AFRC_S_ALV INDEX 1 INTO DATA(WA_AFRC_S_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFRC_S_ALV>-BOX = 1.
<AFRC_S_ALV>-MANDT = 1.
<AFRC_S_ALV>-AUFNR = 1.
<AFRC_S_ALV>-RUECK = 1.
<AFRC_S_ALV>-RMZHL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFRC_S_ALV-ERSDA, sy-vline,
  WA_AFRC_S_ALV-ERTIM, sy-vline,
  WA_AFRC_S_ALV-ERNAM, sy-vline,
  WA_AFRC_S_ALV-AUTYP, sy-vline,
  WA_AFRC_S_ALV-CMFNR, sy-vline,
  WA_AFRC_S_ALV-VBKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFRC_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_AFRC_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_AFRC_S_ALV INTO WA_AFRC_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 AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFRC_S_ALV-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFRC_S_ALV-AUFNR.
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_AFRC_S_ALV_STR, 
BOX TYPE STRING,
MANDT TYPE STRING,
AUFNR TYPE STRING,
RUECK TYPE STRING,
RMZHL TYPE STRING,
ERSDA TYPE STRING,
ERTIM TYPE STRING,
ERNAM TYPE STRING,
AUTYP TYPE STRING,
CMFNR TYPE STRING,
VBKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFRC_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_AFRC_S_ALV_STR-BOX sy-vline 
WA_AFRC_S_ALV_STR-MANDT sy-vline 
WA_AFRC_S_ALV_STR-AUFNR sy-vline 
WA_AFRC_S_ALV_STR-RUECK sy-vline 
WA_AFRC_S_ALV_STR-RMZHL sy-vline 
WA_AFRC_S_ALV_STR-ERSDA sy-vline 
WA_AFRC_S_ALV_STR-ERTIM sy-vline 
WA_AFRC_S_ALV_STR-ERNAM sy-vline 
WA_AFRC_S_ALV_STR-AUTYP sy-vline 
WA_AFRC_S_ALV_STR-CMFNR sy-vline 
WA_AFRC_S_ALV_STR-VBKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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