ABAP Select data from SAP table VWBWKM into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VWBWKM 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 VWBWKM. 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 VWBWKM 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_VWBWKM TYPE STANDARD TABLE OF VWBWKM,
      WA_VWBWKM TYPE VWBWKM,
      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: <VWBWKM> TYPE VWBWKM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VWBWKM
*  INTO TABLE @DATA(IT_VWBWKM2).
*--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_VWBWKM INDEX 1 INTO DATA(WA_VWBWKM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VWBWKM>-MANDT = 1.
<VWBWKM>-BUKRS = 1.
<VWBWKM>-RLDEPO = 1.
<VWBWKM>-KMNR = 1.
<VWBWKM>-DERF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VWBWKM-TERF, sy-vline,
  WA_VWBWKM-NTRANS, sy-vline,
  WA_VWBWKM-TB_SBEWEBE, sy-vline,
  WA_VWBWKM-FSTATUS, sy-vline,
  WA_VWBWKM-SSTORNO, sy-vline,
  WA_VWBWKM-SSTOGRD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VWBWKM 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_VWBWKM 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_VWBWKM INTO WA_VWBWKM.


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

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

*Conversion exit EXCRT, internal->external for field KURS1
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_VWBWKM-KURS1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VWBWKM-KURS1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURS2
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_VWBWKM-KURS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VWBWKM-KURS2.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field RBELNRFI2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VWBWKM-RBELNRFI2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VWBWKM-RBELNRFI2.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field RSTBEG2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VWBWKM-RSTBEG2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VWBWKM-RSTBEG2.
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_VWBWKM_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
RLDEPO TYPE STRING,
KMNR TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
NTRANS TYPE STRING,
TB_SBEWEBE TYPE STRING,
FSTATUS TYPE STRING,
SSTORNO TYPE STRING,
SSTOGRD TYPE STRING,
XZUSATZ TYPE STRING,
RERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
RANL TYPE STRING,
SBEWART TYPE STRING,
SBEWZITI TYPE STRING,
SSOLHAB TYPE STRING,
SVORGKZ TYPE STRING,
DDISPO TYPE STRING,
DBESTAND TYPE STRING,
DVALUT TYPE STRING,
DFAELL TYPE STRING,
ASTUECK TYPE STRING,
BNWHR TYPE STRING,
SNWHR TYPE STRING,
BCWHR TYPE STRING,
SCWHR TYPE STRING,
BBWHR TYPE STRING,
SBWHR TYPE STRING,
BHWHR TYPE STRING,
SHWHR TYPE STRING,
KURS1 TYPE STRING,
KURS2 TYPE STRING,
RBELNRFI TYPE STRING,
RBELNRFI2 TYPE STRING,
RSTBLG TYPE STRING,
RSTBEG2 TYPE STRING,
DBEST6B TYPE STRING,
REFDBEST6B TYPE STRING,
REF6B TYPE STRING,
NORDER1 TYPE STRING,
NORDER2 TYPE STRING,
POSNR TYPE STRING,
KGV_FLAG TYPE STRING,
DEVALPOST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VWBWKM_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_VWBWKM_STR-MANDT sy-vline 
WA_VWBWKM_STR-BUKRS sy-vline 
WA_VWBWKM_STR-RLDEPO sy-vline 
WA_VWBWKM_STR-KMNR sy-vline 
WA_VWBWKM_STR-DERF sy-vline 
WA_VWBWKM_STR-TERF sy-vline 
WA_VWBWKM_STR-NTRANS sy-vline 
WA_VWBWKM_STR-TB_SBEWEBE sy-vline 
WA_VWBWKM_STR-FSTATUS sy-vline 
WA_VWBWKM_STR-SSTORNO sy-vline 
WA_VWBWKM_STR-SSTOGRD sy-vline 
WA_VWBWKM_STR-XZUSATZ sy-vline 
WA_VWBWKM_STR-RERF sy-vline 
WA_VWBWKM_STR-REHER sy-vline 
WA_VWBWKM_STR-RBEAR sy-vline 
WA_VWBWKM_STR-DBEAR sy-vline 
WA_VWBWKM_STR-TBEAR sy-vline 
WA_VWBWKM_STR-RBHER sy-vline 
WA_VWBWKM_STR-RANL sy-vline 
WA_VWBWKM_STR-SBEWART sy-vline 
WA_VWBWKM_STR-SBEWZITI sy-vline 
WA_VWBWKM_STR-SSOLHAB sy-vline 
WA_VWBWKM_STR-SVORGKZ sy-vline 
WA_VWBWKM_STR-DDISPO sy-vline 
WA_VWBWKM_STR-DBESTAND sy-vline 
WA_VWBWKM_STR-DVALUT sy-vline 
WA_VWBWKM_STR-DFAELL sy-vline 
WA_VWBWKM_STR-ASTUECK sy-vline 
WA_VWBWKM_STR-BNWHR sy-vline 
WA_VWBWKM_STR-SNWHR sy-vline 
WA_VWBWKM_STR-BCWHR sy-vline 
WA_VWBWKM_STR-SCWHR sy-vline 
WA_VWBWKM_STR-BBWHR sy-vline 
WA_VWBWKM_STR-SBWHR sy-vline 
WA_VWBWKM_STR-BHWHR sy-vline 
WA_VWBWKM_STR-SHWHR sy-vline 
WA_VWBWKM_STR-KURS1 sy-vline 
WA_VWBWKM_STR-KURS2 sy-vline 
WA_VWBWKM_STR-RBELNRFI sy-vline 
WA_VWBWKM_STR-RBELNRFI2 sy-vline 
WA_VWBWKM_STR-RSTBLG sy-vline 
WA_VWBWKM_STR-RSTBEG2 sy-vline 
WA_VWBWKM_STR-DBEST6B sy-vline 
WA_VWBWKM_STR-REFDBEST6B sy-vline 
WA_VWBWKM_STR-REF6B sy-vline 
WA_VWBWKM_STR-NORDER1 sy-vline 
WA_VWBWKM_STR-NORDER2 sy-vline 
WA_VWBWKM_STR-POSNR sy-vline 
WA_VWBWKM_STR-KGV_FLAG sy-vline 
WA_VWBWKM_STR-DEVALPOST sy-vline      INTO ld_text SEPARATED BY SPACE.

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