ABAP Select data from SAP table IEWMSTKMATREFDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEWMSTKMATREFDOC
*  INTO TABLE @DATA(IT_IEWMSTKMATREFDOC2).
*--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_IEWMSTKMATREFDOC INDEX 1 INTO DATA(WA_IEWMSTKMATREFDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEWMSTKMATREFDOC>-MANDT = 1.
<IEWMSTKMATREFDOC>-WAREHOUSE = 1.
<IEWMSTKMATREFDOC>-PRODUCTUUID = 1.
<IEWMSTKMATREFDOC>-BATCHUUID = 1.
<IEWMSTKMATREFDOC>-STOCKTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEWMSTKMATREFDOC-DELIVERYDOCUMENT, sy-vline,
  WA_IEWMSTKMATREFDOC-STOCKUSAGE, sy-vline,
  WA_IEWMSTKMATREFDOC-STOCKOWNER, sy-vline,
  WA_IEWMSTKMATREFDOC-STOCKOWNERPARTNERROLE, sy-vline,
  WA_IEWMSTKMATREFDOC-ENTITLEDTODISPOSEPARTY, sy-vline,
  WA_IEWMSTKMATREFDOC-ENTITLEDTODISPOSEPARTNERROLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEWMSTKMATREFDOC 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_IEWMSTKMATREFDOC 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_IEWMSTKMATREFDOC INTO WA_IEWMSTKMATREFDOC.


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

*Conversion exit ALPHA, internal->external for field ENTITLEDTODISPOSEPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEWMSTKMATREFDOC-ENTITLEDTODISPOSEPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEWMSTKMATREFDOC-ENTITLEDTODISPOSEPARTY.
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_IEWMSTKMATREFDOC_STR, 
MANDT TYPE STRING,
WAREHOUSE TYPE STRING,
PRODUCTUUID TYPE STRING,
BATCHUUID TYPE STRING,
STOCKTYPE TYPE STRING,
DELIVERYDOCUMENT TYPE STRING,
STOCKUSAGE TYPE STRING,
STOCKOWNER TYPE STRING,
STOCKOWNERPARTNERROLE TYPE STRING,
ENTITLEDTODISPOSEPARTY TYPE STRING,
ENTITLEDTODISPOSEPARTNERROLE TYPE STRING,
COUNTERFORSTOCKSEPARATION TYPE STRING,
STOCKITEMUUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEWMSTKMATREFDOC_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_IEWMSTKMATREFDOC_STR-MANDT sy-vline 
WA_IEWMSTKMATREFDOC_STR-WAREHOUSE sy-vline 
WA_IEWMSTKMATREFDOC_STR-PRODUCTUUID sy-vline 
WA_IEWMSTKMATREFDOC_STR-BATCHUUID sy-vline 
WA_IEWMSTKMATREFDOC_STR-STOCKTYPE sy-vline 
WA_IEWMSTKMATREFDOC_STR-DELIVERYDOCUMENT sy-vline 
WA_IEWMSTKMATREFDOC_STR-STOCKUSAGE sy-vline 
WA_IEWMSTKMATREFDOC_STR-STOCKOWNER sy-vline 
WA_IEWMSTKMATREFDOC_STR-STOCKOWNERPARTNERROLE sy-vline 
WA_IEWMSTKMATREFDOC_STR-ENTITLEDTODISPOSEPARTY sy-vline 
WA_IEWMSTKMATREFDOC_STR-ENTITLEDTODISPOSEPARTNERROLE sy-vline 
WA_IEWMSTKMATREFDOC_STR-COUNTERFORSTOCKSEPARATION sy-vline 
WA_IEWMSTKMATREFDOC_STR-STOCKITEMUUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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