ABAP Select data from SAP table WCBE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCBE
*  INTO TABLE @DATA(IT_WCBE2).
*--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_WCBE INDEX 1 INTO DATA(WA_WCBE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCBE>-MATNR = 1.
<WCBE>-BWGRP = 1.
<WCBE>-WERKS = 1.
<WCBE>-LGORT = 1.
<WCBE>-SGT_SCAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCBE-CHARG, sy-vline,
  WA_WCBE-SATNR, sy-vline,
  WA_WCBE-LGPBE, sy-vline,
  WA_WCBE-LVORM, sy-vline,
  WA_WCBE-LABST, sy-vline,
  WA_WCBE-UMLME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCBE 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_WCBE 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_WCBE INTO WA_WCBE.


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

*Conversion exit MATN1, internal->external for field SATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WCBE-SATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCBE-SATNR.
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_WCBE_STR, 
MATNR TYPE STRING,
BWGRP TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
SGT_SCAT TYPE STRING,
CHARG TYPE STRING,
SATNR TYPE STRING,
LGPBE TYPE STRING,
LVORM TYPE STRING,
LABST TYPE STRING,
UMLME TYPE STRING,
INSME TYPE STRING,
EINME TYPE STRING,
SPEME TYPE STRING,
RETME TYPE STRING,
VBMNA TYPE STRING,
VBMNB TYPE STRING,
VBMNC TYPE STRING,
VBMNE TYPE STRING,
VBMNG TYPE STRING,
VBMNI TYPE STRING,
OMENG TYPE STRING,
MENGE TYPE STRING,
MENGK TYPE STRING,
BDMNG TYPE STRING,
BDMNS TYPE STRING,
KLABS TYPE STRING,
KINSM TYPE STRING,
KEINM TYPE STRING,
KSPEM TYPE STRING,
KALAB TYPE STRING,
KAINS TYPE STRING,
KASPE TYPE STRING,
KAEIN TYPE STRING,
MLABS TYPE STRING,
MINSM TYPE STRING,
MEINM TYPE STRING,
MSPEM TYPE STRING,
PRLAB TYPE STRING,
PRINS TYPE STRING,
PRSPE TYPE STRING,
PREIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCBE_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_WCBE_STR-MATNR sy-vline 
WA_WCBE_STR-BWGRP sy-vline 
WA_WCBE_STR-WERKS sy-vline 
WA_WCBE_STR-LGORT sy-vline 
WA_WCBE_STR-SGT_SCAT sy-vline 
WA_WCBE_STR-CHARG sy-vline 
WA_WCBE_STR-SATNR sy-vline 
WA_WCBE_STR-LGPBE sy-vline 
WA_WCBE_STR-LVORM sy-vline 
WA_WCBE_STR-LABST sy-vline 
WA_WCBE_STR-UMLME sy-vline 
WA_WCBE_STR-INSME sy-vline 
WA_WCBE_STR-EINME sy-vline 
WA_WCBE_STR-SPEME sy-vline 
WA_WCBE_STR-RETME sy-vline 
WA_WCBE_STR-VBMNA sy-vline 
WA_WCBE_STR-VBMNB sy-vline 
WA_WCBE_STR-VBMNC sy-vline 
WA_WCBE_STR-VBMNE sy-vline 
WA_WCBE_STR-VBMNG sy-vline 
WA_WCBE_STR-VBMNI sy-vline 
WA_WCBE_STR-OMENG sy-vline 
WA_WCBE_STR-MENGE sy-vline 
WA_WCBE_STR-MENGK sy-vline 
WA_WCBE_STR-BDMNG sy-vline 
WA_WCBE_STR-BDMNS sy-vline 
WA_WCBE_STR-KLABS sy-vline 
WA_WCBE_STR-KINSM sy-vline 
WA_WCBE_STR-KEINM sy-vline 
WA_WCBE_STR-KSPEM sy-vline 
WA_WCBE_STR-KALAB sy-vline 
WA_WCBE_STR-KAINS sy-vline 
WA_WCBE_STR-KASPE sy-vline 
WA_WCBE_STR-KAEIN sy-vline 
WA_WCBE_STR-MLABS sy-vline 
WA_WCBE_STR-MINSM sy-vline 
WA_WCBE_STR-MEINM sy-vline 
WA_WCBE_STR-MSPEM sy-vline 
WA_WCBE_STR-PRLAB sy-vline 
WA_WCBE_STR-PRINS sy-vline 
WA_WCBE_STR-PRSPE sy-vline 
WA_WCBE_STR-PREIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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