ABAP Select data from SAP table MDMWIND into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDMWIND
*  INTO TABLE @DATA(IT_MDMWIND2).
*--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_MDMWIND INDEX 1 INTO DATA(WA_MDMWIND2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDMWIND>-INDEX = 1.
<MDMWIND>-MATNR = 1.
<MDMWIND>-WERKS = 1.
<MDMWIND>-BERID = 1.
<MDMWIND>-MAKTX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDMWIND-AMPEL, sy-vline,
  WA_MDMWIND-BERW1, sy-vline,
  WA_MDMWIND-BERW2, sy-vline,
  WA_MDMWIND-BERW4, sy-vline,
  WA_MDMWIND-EVAPR, sy-vline,
  WA_MDMWIND-MODBAD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDMWIND 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_MDMWIND 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_MDMWIND INTO WA_MDMWIND.


*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_MDMWIND-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDMWIND-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDMWIND-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDMWIND-MEINS.
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_MDMWIND_STR, 
INDEX TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
BERID TYPE STRING,
MAKTX TYPE STRING,
AMPEL TYPE STRING,
BERW1 TYPE STRING,
BERW2 TYPE STRING,
BERW4 TYPE STRING,
EVAPR TYPE STRING,
MODBAD TYPE STRING,
WKBST TYPE STRING,
MEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDMWIND_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_MDMWIND_STR-INDEX sy-vline 
WA_MDMWIND_STR-MATNR sy-vline 
WA_MDMWIND_STR-WERKS sy-vline 
WA_MDMWIND_STR-BERID sy-vline 
WA_MDMWIND_STR-MAKTX sy-vline 
WA_MDMWIND_STR-AMPEL sy-vline 
WA_MDMWIND_STR-BERW1 sy-vline 
WA_MDMWIND_STR-BERW2 sy-vline 
WA_MDMWIND_STR-BERW4 sy-vline 
WA_MDMWIND_STR-EVAPR sy-vline 
WA_MDMWIND_STR-MODBAD sy-vline 
WA_MDMWIND_STR-WKBST sy-vline 
WA_MDMWIND_STR-MEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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