ABAP Select data from SAP table WMB03 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WMB03 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 WMB03. 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 WMB03 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_WMB03 TYPE STANDARD TABLE OF WMB03,
      WA_WMB03 TYPE WMB03,
      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: <WMB03> TYPE WMB03.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WMB03.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WMB03
  INTO TABLE IT_WMB03.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WMB03
*  INTO TABLE @DATA(IT_WMB032).
*--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_WMB03 INDEX 1 INTO DATA(WA_WMB032).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WMB03 ASSIGNING <WMB03>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WMB03>-VAKEY1 = 1.
<WMB03>-VAKEY2 = 1.
<WMB03>-AUWRT = 1.
<WMB03>-KSTBS = 1.
<WMB03>-KAWRT = 1.

ENDLOOP.

LOOP AT IT_WMB03 INTO WA_WMB03.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WMB03-SKONWA, sy-vline,
  WA_WMB03-WAERS, sy-vline,
  WA_WMB03-WAERS_AR, sy-vline,
  WA_WMB03-KONWA, sy-vline,
  WA_WMB03-KRECH, sy-vline,
  WA_WMB03-KZBZG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WMB03 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_WMB03 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_WMB03 INTO WA_WMB03.


*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 CUNIT, internal->external for field KONMS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WMB03-KONMS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WMB03-KONMS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WMB03-KMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WMB03-KMEIN.
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_WMB03_STR, 
VAKEY1 TYPE STRING,
VAKEY2 TYPE STRING,
AUWRT TYPE STRING,
KSTBS TYPE STRING,
KAWRT TYPE STRING,
SKONWA TYPE STRING,
WAERS TYPE STRING,
WAERS_AR TYPE STRING,
KONWA TYPE STRING,
KRECH TYPE STRING,
KZBZG TYPE STRING,
KONWS TYPE STRING,
KONMS TYPE STRING,
KMEIN TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
PERKON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WMB03_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_WMB03_STR-VAKEY1 sy-vline 
WA_WMB03_STR-VAKEY2 sy-vline 
WA_WMB03_STR-AUWRT sy-vline 
WA_WMB03_STR-KSTBS sy-vline 
WA_WMB03_STR-KAWRT sy-vline 
WA_WMB03_STR-SKONWA sy-vline 
WA_WMB03_STR-WAERS sy-vline 
WA_WMB03_STR-WAERS_AR sy-vline 
WA_WMB03_STR-KONWA sy-vline 
WA_WMB03_STR-KRECH sy-vline 
WA_WMB03_STR-KZBZG sy-vline 
WA_WMB03_STR-KONWS sy-vline 
WA_WMB03_STR-KONMS sy-vline 
WA_WMB03_STR-KMEIN sy-vline 
WA_WMB03_STR-DATAB sy-vline 
WA_WMB03_STR-DATBI sy-vline 
WA_WMB03_STR-PERKON sy-vline      INTO ld_text SEPARATED BY SPACE.

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