ABAP Select data from SAP table WVFB_PARTNERS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WVFB_PARTNERS
*  INTO TABLE @DATA(IT_WVFB_PARTNERS2).
*--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_WVFB_PARTNERS INDEX 1 INTO DATA(WA_WVFB_PARTNERS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WVFB_PARTNERS>-WGSREQN = 1.
<WVFB_PARTNERS>-WGSREQP = 1.
<WVFB_PARTNERS>-I_BELNR = 1.
<WVFB_PARTNERS>-I_POSNR = 1.
<WVFB_PARTNERS>-NR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WVFB_PARTNERS-STATUS, sy-vline,
  WA_WVFB_PARTNERS-ILNNR, sy-vline,
  WA_WVFB_PARTNERS-LTSNR, sy-vline,
  WA_WVFB_PARTNERS-PARVW, sy-vline,
  WA_WVFB_PARTNERS-PARTN, sy-vline,
  WA_WVFB_PARTNERS-LIFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WVFB_PARTNERS 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_WVFB_PARTNERS 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_WVFB_PARTNERS INTO WA_WVFB_PARTNERS.


*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 WGSREQN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WVFB_PARTNERS-WGSREQN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVFB_PARTNERS-WGSREQN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field I_BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WVFB_PARTNERS-I_BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVFB_PARTNERS-I_BELNR.
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_WVFB_PARTNERS_STR, 
WGSREQN TYPE STRING,
WGSREQP TYPE STRING,
I_BELNR TYPE STRING,
I_POSNR TYPE STRING,
NR TYPE STRING,
STATUS TYPE STRING,
ILNNR TYPE STRING,
LTSNR TYPE STRING,
PARVW TYPE STRING,
PARTN TYPE STRING,
LIFNR TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
STRAS TYPE STRING,
STRS2 TYPE STRING,
PFACH TYPE STRING,
ORT01 TYPE STRING,
COUNC TYPE STRING,
PSTLZ TYPE STRING,
PSTL2 TYPE STRING,
LAND1 TYPE STRING,
ABLAD TYPE STRING,
PERNR TYPE STRING,
PARNR TYPE STRING,
TELF1 TYPE STRING,
TELF2 TYPE STRING,
TELBX TYPE STRING,
TELFX TYPE STRING,
TELTX TYPE STRING,
TELX1 TYPE STRING,
SPRAS TYPE STRING,
ANRED TYPE STRING,
ORT02 TYPE STRING,
HAUSN TYPE STRING,
STOCK TYPE STRING,
REGIO TYPE STRING,
PARGE TYPE STRING,
ISOAL TYPE STRING,
ISONU TYPE STRING,
FCODE TYPE STRING,
IHREZ TYPE STRING,
BNAME TYPE STRING,
PAORG TYPE STRING,
ORGTX TYPE STRING,
PAGRU TYPE STRING,
KNREF TYPE STRING,
SPRAS_ISO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WVFB_PARTNERS_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_WVFB_PARTNERS_STR-WGSREQN sy-vline 
WA_WVFB_PARTNERS_STR-WGSREQP sy-vline 
WA_WVFB_PARTNERS_STR-I_BELNR sy-vline 
WA_WVFB_PARTNERS_STR-I_POSNR sy-vline 
WA_WVFB_PARTNERS_STR-NR sy-vline 
WA_WVFB_PARTNERS_STR-STATUS sy-vline 
WA_WVFB_PARTNERS_STR-ILNNR sy-vline 
WA_WVFB_PARTNERS_STR-LTSNR sy-vline 
WA_WVFB_PARTNERS_STR-PARVW sy-vline 
WA_WVFB_PARTNERS_STR-PARTN sy-vline 
WA_WVFB_PARTNERS_STR-LIFNR sy-vline 
WA_WVFB_PARTNERS_STR-NAME1 sy-vline 
WA_WVFB_PARTNERS_STR-NAME2 sy-vline 
WA_WVFB_PARTNERS_STR-NAME3 sy-vline 
WA_WVFB_PARTNERS_STR-NAME4 sy-vline 
WA_WVFB_PARTNERS_STR-STRAS sy-vline 
WA_WVFB_PARTNERS_STR-STRS2 sy-vline 
WA_WVFB_PARTNERS_STR-PFACH sy-vline 
WA_WVFB_PARTNERS_STR-ORT01 sy-vline 
WA_WVFB_PARTNERS_STR-COUNC sy-vline 
WA_WVFB_PARTNERS_STR-PSTLZ sy-vline 
WA_WVFB_PARTNERS_STR-PSTL2 sy-vline 
WA_WVFB_PARTNERS_STR-LAND1 sy-vline 
WA_WVFB_PARTNERS_STR-ABLAD sy-vline 
WA_WVFB_PARTNERS_STR-PERNR sy-vline 
WA_WVFB_PARTNERS_STR-PARNR sy-vline 
WA_WVFB_PARTNERS_STR-TELF1 sy-vline 
WA_WVFB_PARTNERS_STR-TELF2 sy-vline 
WA_WVFB_PARTNERS_STR-TELBX sy-vline 
WA_WVFB_PARTNERS_STR-TELFX sy-vline 
WA_WVFB_PARTNERS_STR-TELTX sy-vline 
WA_WVFB_PARTNERS_STR-TELX1 sy-vline 
WA_WVFB_PARTNERS_STR-SPRAS sy-vline 
WA_WVFB_PARTNERS_STR-ANRED sy-vline 
WA_WVFB_PARTNERS_STR-ORT02 sy-vline 
WA_WVFB_PARTNERS_STR-HAUSN sy-vline 
WA_WVFB_PARTNERS_STR-STOCK sy-vline 
WA_WVFB_PARTNERS_STR-REGIO sy-vline 
WA_WVFB_PARTNERS_STR-PARGE sy-vline 
WA_WVFB_PARTNERS_STR-ISOAL sy-vline 
WA_WVFB_PARTNERS_STR-ISONU sy-vline 
WA_WVFB_PARTNERS_STR-FCODE sy-vline 
WA_WVFB_PARTNERS_STR-IHREZ sy-vline 
WA_WVFB_PARTNERS_STR-BNAME sy-vline 
WA_WVFB_PARTNERS_STR-PAORG sy-vline 
WA_WVFB_PARTNERS_STR-ORGTX sy-vline 
WA_WVFB_PARTNERS_STR-PAGRU sy-vline 
WA_WVFB_PARTNERS_STR-KNREF sy-vline 
WA_WVFB_PARTNERS_STR-SPRAS_ISO sy-vline      INTO ld_text SEPARATED BY SPACE.

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