ABAP Select data from SAP table AFFW_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 AFFW_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 AFFW_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 AFFW_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_AFFW_S_ALV TYPE STANDARD TABLE OF AFFW_S_ALV,
      WA_AFFW_S_ALV TYPE AFFW_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: <AFFW_S_ALV> TYPE AFFW_S_ALV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFFW_S_ALV
*  INTO TABLE @DATA(IT_AFFW_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_AFFW_S_ALV INDEX 1 INTO DATA(WA_AFFW_S_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFFW_S_ALV>-BOX = 1.
<AFFW_S_ALV>-VBKZ = 1.
<AFFW_S_ALV>-STATUS = 1.
<AFFW_S_ALV>-WEBLNR = 1.
<AFFW_S_ALV>-WEBLPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFFW_S_ALV-MATNR, sy-vline,
  WA_AFFW_S_ALV-MAKTX, sy-vline,
  WA_AFFW_S_ALV-WERKS, sy-vline,
  WA_AFFW_S_ALV-LGORT, sy-vline,
  WA_AFFW_S_ALV-CHARG, sy-vline,
  WA_AFFW_S_ALV-SERNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFFW_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_AFFW_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_AFFW_S_ALV INTO WA_AFFW_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 WEBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFFW_S_ALV-WEBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFW_S_ALV-WEBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_AFFW_S_ALV-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFW_S_ALV-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field SERNR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_AFFW_S_ALV-SERNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFW_S_ALV-SERNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFFW_S_ALV-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFW_S_ALV-ERFME.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_AFFW_S_ALV-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFW_S_ALV-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field /CWM/ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFFW_S_ALV-/CWM/ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFW_S_ALV-/CWM/ERFME.
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_AFFW_S_ALV_STR, 
BOX TYPE STRING,
VBKZ TYPE STRING,
STATUS TYPE STRING,
WEBLNR TYPE STRING,
WEBLPOS TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SERNR TYPE STRING,
BWTAR TYPE STRING,
BWART TYPE STRING,
SOBKZ TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
AUFNR TYPE STRING,
AUTYP TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
MSGTEXT TYPE STRING,
BUDAT TYPE STRING,
ERNAM TYPE STRING,
ERSDA TYPE STRING,
ERZET TYPE STRING,
FWDAT TYPE STRING,
FWZET TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PS_PSP_PNR TYPE STRING,
FEVOR TYPE STRING,
DISPO TYPE STRING,
BLCOUNT TYPE STRING,
/CWM/ERFMG TYPE STRING,
/CWM/ERFME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFFW_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_AFFW_S_ALV_STR-BOX sy-vline 
WA_AFFW_S_ALV_STR-VBKZ sy-vline 
WA_AFFW_S_ALV_STR-STATUS sy-vline 
WA_AFFW_S_ALV_STR-WEBLNR sy-vline 
WA_AFFW_S_ALV_STR-WEBLPOS sy-vline 
WA_AFFW_S_ALV_STR-MATNR sy-vline 
WA_AFFW_S_ALV_STR-MAKTX sy-vline 
WA_AFFW_S_ALV_STR-WERKS sy-vline 
WA_AFFW_S_ALV_STR-LGORT sy-vline 
WA_AFFW_S_ALV_STR-CHARG sy-vline 
WA_AFFW_S_ALV_STR-SERNR sy-vline 
WA_AFFW_S_ALV_STR-BWTAR sy-vline 
WA_AFFW_S_ALV_STR-BWART sy-vline 
WA_AFFW_S_ALV_STR-SOBKZ sy-vline 
WA_AFFW_S_ALV_STR-ERFMG sy-vline 
WA_AFFW_S_ALV_STR-ERFME sy-vline 
WA_AFFW_S_ALV_STR-AUFNR sy-vline 
WA_AFFW_S_ALV_STR-AUTYP sy-vline 
WA_AFFW_S_ALV_STR-MSGID sy-vline 
WA_AFFW_S_ALV_STR-MSGNO sy-vline 
WA_AFFW_S_ALV_STR-MSGV1 sy-vline 
WA_AFFW_S_ALV_STR-MSGV2 sy-vline 
WA_AFFW_S_ALV_STR-MSGV3 sy-vline 
WA_AFFW_S_ALV_STR-MSGV4 sy-vline 
WA_AFFW_S_ALV_STR-MSGTEXT sy-vline 
WA_AFFW_S_ALV_STR-BUDAT sy-vline 
WA_AFFW_S_ALV_STR-ERNAM sy-vline 
WA_AFFW_S_ALV_STR-ERSDA sy-vline 
WA_AFFW_S_ALV_STR-ERZET sy-vline 
WA_AFFW_S_ALV_STR-FWDAT sy-vline 
WA_AFFW_S_ALV_STR-FWZET sy-vline 
WA_AFFW_S_ALV_STR-KDAUF sy-vline 
WA_AFFW_S_ALV_STR-KDPOS sy-vline 
WA_AFFW_S_ALV_STR-PS_PSP_PNR sy-vline 
WA_AFFW_S_ALV_STR-FEVOR sy-vline 
WA_AFFW_S_ALV_STR-DISPO sy-vline 
WA_AFFW_S_ALV_STR-BLCOUNT sy-vline 
WA_AFFW_S_ALV_STR-/CWM/ERFMG sy-vline 
WA_AFFW_S_ALV_STR-/CWM/ERFME sy-vline      INTO ld_text SEPARATED BY SPACE.

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