ABAP Select data from SAP table WVFBSTRING into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WVFBSTRING
*  INTO TABLE @DATA(IT_WVFBSTRING2).
*--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_WVFBSTRING INDEX 1 INTO DATA(WA_WVFBSTRING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WVFBSTRING>-MANDT = 1.
<WVFBSTRING>-WGSREQN = 1.
<WVFBSTRING>-WGSREQP = 1.
<WVFBSTRING>-WBTYP = 1.
<WVFBSTRING>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WVFBSTRING-BSTYP, sy-vline,
  WA_WVFBSTRING-BSART, sy-vline,
  WA_WVFBSTRING-LIFNR, sy-vline,
  WA_WVFBSTRING-ZTERM, sy-vline,
  WA_WVFBSTRING-EKORG, sy-vline,
  WA_WVFBSTRING-EKGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WVFBSTRING 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_WVFBSTRING 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_WVFBSTRING INTO WA_WVFBSTRING.


*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_WVFBSTRING-WGSREQN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVFBSTRING-WGSREQN.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_WVFBSTRING-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVFBSTRING-EAN11.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WVFBSTRING-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVFBSTRING-AKTNR.
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_WVFBSTRING_STR, 
MANDT TYPE STRING,
WGSREQN TYPE STRING,
WGSREQP TYPE STRING,
WBTYP TYPE STRING,
BUKRS TYPE STRING,
BSTYP TYPE STRING,
BSART TYPE STRING,
LIFNR TYPE STRING,
ZTERM TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
DISPO TYPE STRING,
WAERS TYPE STRING,
WKURS TYPE STRING,
KUNNR TYPE STRING,
RESWK TYPE STRING,
KONNR TYPE STRING,
MATNR TYPE STRING,
EMATN TYPE STRING,
WERKS TYPE STRING,
BEDNR TYPE STRING,
MATKL TYPE STRING,
IDNLF TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
PSTYP TYPE STRING,
LMEIN TYPE STRING,
EAN11 TYPE STRING,
AKTNR TYPE STRING,
EINDT TYPE STRING,
UZEIT TYPE STRING,
BEDAT TYPE STRING,
VSTAT TYPE STRING,
POSNRI TYPE STRING,
SEGNUM TYPE STRING,
RETPO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WVFBSTRING_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_WVFBSTRING_STR-MANDT sy-vline 
WA_WVFBSTRING_STR-WGSREQN sy-vline 
WA_WVFBSTRING_STR-WGSREQP sy-vline 
WA_WVFBSTRING_STR-WBTYP sy-vline 
WA_WVFBSTRING_STR-BUKRS sy-vline 
WA_WVFBSTRING_STR-BSTYP sy-vline 
WA_WVFBSTRING_STR-BSART sy-vline 
WA_WVFBSTRING_STR-LIFNR sy-vline 
WA_WVFBSTRING_STR-ZTERM sy-vline 
WA_WVFBSTRING_STR-EKORG sy-vline 
WA_WVFBSTRING_STR-EKGRP sy-vline 
WA_WVFBSTRING_STR-DISPO sy-vline 
WA_WVFBSTRING_STR-WAERS sy-vline 
WA_WVFBSTRING_STR-WKURS sy-vline 
WA_WVFBSTRING_STR-KUNNR sy-vline 
WA_WVFBSTRING_STR-RESWK sy-vline 
WA_WVFBSTRING_STR-KONNR sy-vline 
WA_WVFBSTRING_STR-MATNR sy-vline 
WA_WVFBSTRING_STR-EMATN sy-vline 
WA_WVFBSTRING_STR-WERKS sy-vline 
WA_WVFBSTRING_STR-BEDNR sy-vline 
WA_WVFBSTRING_STR-MATKL sy-vline 
WA_WVFBSTRING_STR-IDNLF sy-vline 
WA_WVFBSTRING_STR-MENGE sy-vline 
WA_WVFBSTRING_STR-MEINS sy-vline 
WA_WVFBSTRING_STR-PSTYP sy-vline 
WA_WVFBSTRING_STR-LMEIN sy-vline 
WA_WVFBSTRING_STR-EAN11 sy-vline 
WA_WVFBSTRING_STR-AKTNR sy-vline 
WA_WVFBSTRING_STR-EINDT sy-vline 
WA_WVFBSTRING_STR-UZEIT sy-vline 
WA_WVFBSTRING_STR-BEDAT sy-vline 
WA_WVFBSTRING_STR-VSTAT sy-vline 
WA_WVFBSTRING_STR-POSNRI sy-vline 
WA_WVFBSTRING_STR-SEGNUM sy-vline 
WA_WVFBSTRING_STR-RETPO sy-vline      INTO ld_text SEPARATED BY SPACE.

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