ABAP Select data from SAP table AFFWV0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AFFWV0 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 AFFWV0. 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 AFFWV0 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_AFFWV0 TYPE STANDARD TABLE OF AFFWV0,
      WA_AFFWV0 TYPE AFFWV0,
      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: <AFFWV0> TYPE AFFWV0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_AFFWV0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM AFFWV0
  INTO TABLE IT_AFFWV0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFFWV0
*  INTO TABLE @DATA(IT_AFFWV02).
*--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_AFFWV0 INDEX 1 INTO DATA(WA_AFFWV02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_AFFWV0 ASSIGNING <AFFWV0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFFWV0>-MANDT = 1.
<AFFWV0>-WEBLNR = 1.
<AFFWV0>-WEBLPOS = 1.
<AFFWV0>-MATNR = 1.
<AFFWV0>-WERKS = 1.

ENDLOOP.

LOOP AT IT_AFFWV0 INTO WA_AFFWV0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFFWV0-LGORT, sy-vline,
  WA_AFFWV0-CHARG, sy-vline,
  WA_AFFWV0-BWART, sy-vline,
  WA_AFFWV0-SOBKZ, sy-vline,
  WA_AFFWV0-KZVBR, sy-vline,
  WA_AFFWV0-KDAUF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFFWV0 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_AFFWV0 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_AFFWV0 INTO WA_AFFWV0.


*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_AFFWV0-WEBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-WEBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-ERFME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WABLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-WABLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-WABLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SMBLN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-SMBLN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-SMBLN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field SJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-SJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-SJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFBLN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFFWV0-REFBLN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFWV0-REFBLN.
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_AFFWV0_STR, 
MANDT TYPE STRING,
WEBLNR TYPE STRING,
WEBLPOS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
BWART TYPE STRING,
SOBKZ TYPE STRING,
KZVBR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
SHKZG TYPE STRING,
WAERS TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
ELIKZ TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,
AUFNR TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
KZEAR TYPE STRING,
KZBEW TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
RUECK TYPE STRING,
RMZHL TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
AUFPS TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
WABLNR TYPE STRING,
AUTYP TYPE STRING,
LIFNR TYPE STRING,
INSMK TYPE STRING,
FWDAT TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
SMBLN TYPE STRING,
SMBLP TYPE STRING,
SJAHR TYPE STRING,
RSART TYPE STRING,
MHDAT TYPE STRING,
PS_PSP_PNR TYPE STRING,
FWZET TYPE STRING,
REFBLN TYPE STRING,
GRUND TYPE STRING,
BWTAR TYPE STRING,
PRVBE TYPE STRING,
BERKZ TYPE STRING,
XPCBT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFFWV0_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_AFFWV0_STR-MANDT sy-vline 
WA_AFFWV0_STR-WEBLNR sy-vline 
WA_AFFWV0_STR-WEBLPOS sy-vline 
WA_AFFWV0_STR-MATNR sy-vline 
WA_AFFWV0_STR-WERKS sy-vline 
WA_AFFWV0_STR-LGORT sy-vline 
WA_AFFWV0_STR-CHARG sy-vline 
WA_AFFWV0_STR-BWART sy-vline 
WA_AFFWV0_STR-SOBKZ sy-vline 
WA_AFFWV0_STR-KZVBR sy-vline 
WA_AFFWV0_STR-KDAUF sy-vline 
WA_AFFWV0_STR-KDPOS sy-vline 
WA_AFFWV0_STR-KDEIN sy-vline 
WA_AFFWV0_STR-SHKZG sy-vline 
WA_AFFWV0_STR-WAERS sy-vline 
WA_AFFWV0_STR-ERFMG sy-vline 
WA_AFFWV0_STR-ERFME sy-vline 
WA_AFFWV0_STR-ELIKZ sy-vline 
WA_AFFWV0_STR-WEMPF sy-vline 
WA_AFFWV0_STR-ABLAD sy-vline 
WA_AFFWV0_STR-AUFNR sy-vline 
WA_AFFWV0_STR-RSNUM sy-vline 
WA_AFFWV0_STR-RSPOS sy-vline 
WA_AFFWV0_STR-KZEAR sy-vline 
WA_AFFWV0_STR-KZBEW sy-vline 
WA_AFFWV0_STR-LGNUM sy-vline 
WA_AFFWV0_STR-LGTYP sy-vline 
WA_AFFWV0_STR-LGPLA sy-vline 
WA_AFFWV0_STR-RUECK sy-vline 
WA_AFFWV0_STR-RMZHL sy-vline 
WA_AFFWV0_STR-AUFPL sy-vline 
WA_AFFWV0_STR-APLZL sy-vline 
WA_AFFWV0_STR-AUFPS sy-vline 
WA_AFFWV0_STR-MSGID sy-vline 
WA_AFFWV0_STR-MSGNO sy-vline 
WA_AFFWV0_STR-WABLNR sy-vline 
WA_AFFWV0_STR-AUTYP sy-vline 
WA_AFFWV0_STR-LIFNR sy-vline 
WA_AFFWV0_STR-INSMK sy-vline 
WA_AFFWV0_STR-FWDAT sy-vline 
WA_AFFWV0_STR-BUDAT sy-vline 
WA_AFFWV0_STR-BLDAT sy-vline 
WA_AFFWV0_STR-SMBLN sy-vline 
WA_AFFWV0_STR-SMBLP sy-vline 
WA_AFFWV0_STR-SJAHR sy-vline 
WA_AFFWV0_STR-RSART sy-vline 
WA_AFFWV0_STR-MHDAT sy-vline 
WA_AFFWV0_STR-PS_PSP_PNR sy-vline 
WA_AFFWV0_STR-FWZET sy-vline 
WA_AFFWV0_STR-REFBLN sy-vline 
WA_AFFWV0_STR-GRUND sy-vline 
WA_AFFWV0_STR-BWTAR sy-vline 
WA_AFFWV0_STR-PRVBE sy-vline 
WA_AFFWV0_STR-BERKZ sy-vline 
WA_AFFWV0_STR-XPCBT sy-vline      INTO ld_text SEPARATED BY SPACE.

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