ABAP Select data from SAP table VMEV_D_AD_ITEM_MM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VMEV_D_AD_ITEM_MM
*  INTO TABLE @DATA(IT_VMEV_D_AD_ITEM_MM2).
*--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_VMEV_D_AD_ITEM_MM INDEX 1 INTO DATA(WA_VMEV_D_AD_ITEM_MM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VMEV_D_AD_ITEM_MM>-MANDT = 1.
<VMEV_D_AD_ITEM_MM>-GUID_ITEM = 1.
<VMEV_D_AD_ITEM_MM>-EKORG = 1.
<VMEV_D_AD_ITEM_MM>-EKGRP = 1.
<VMEV_D_AD_ITEM_MM>-LIFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VMEV_D_AD_ITEM_MM-WEMNG, sy-vline,
  WA_VMEV_D_AD_ITEM_MM-BPWEM, sy-vline,
  WA_VMEV_D_AD_ITEM_MM-WEWWR, sy-vline,
  WA_VMEV_D_AD_ITEM_MM-WEWRT, sy-vline,
  WA_VMEV_D_AD_ITEM_MM-REMNG, sy-vline,
  WA_VMEV_D_AD_ITEM_MM-REFWR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VMEV_D_AD_ITEM_MM 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_VMEV_D_AD_ITEM_MM 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_VMEV_D_AD_ITEM_MM INTO WA_VMEV_D_AD_ITEM_MM.


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

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

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

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

*Conversion exit CUNIT, internal->external for field MARAMEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VMEV_D_AD_ITEM_MM-MARAMEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VMEV_D_AD_ITEM_MM-MARAMEINS.
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_VMEV_D_AD_ITEM_MM_STR, 
MANDT TYPE STRING,
GUID_ITEM TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
LIFNR TYPE STRING,
WEMNG TYPE STRING,
BPWEM TYPE STRING,
WEWWR TYPE STRING,
WEWRT TYPE STRING,
REMNG TYPE STRING,
REFWR TYPE STRING,
AREWW TYPE STRING,
REEWR TYPE STRING,
AREWR TYPE STRING,
BPMNG TYPE STRING,
BPRME TYPE STRING,
BPUMN TYPE STRING,
BPUMZ TYPE STRING,
KNUMV TYPE STRING,
KPOSN TYPE STRING,
XBLNR TYPE STRING,
BWTAR TYPE STRING,
LBKUM TYPE STRING,
WEBUD TYPE STRING,
KURSF TYPE STRING,
WWERT TYPE STRING,
KURST TYPE STRING,
KUFIX TYPE STRING,
OPEN_GRIR_AMOUNT TYPE STRING,
OPEN_GRIR_AMOUNT_LC TYPE STRING,
KZ TYPE STRING,
MEV_D_AD_ROOTWAERS TYPE STRING,
MEV_D_AD_ITEMORDER_UOM TYPE STRING,
MARAMEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VMEV_D_AD_ITEM_MM_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_VMEV_D_AD_ITEM_MM_STR-MANDT sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-GUID_ITEM sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-EKORG sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-EKGRP sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-LIFNR sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-WEMNG sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-BPWEM sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-WEWWR sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-WEWRT sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-REMNG sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-REFWR sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-AREWW sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-REEWR sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-AREWR sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-BPMNG sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-BPRME sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-BPUMN sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-BPUMZ sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-KNUMV sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-KPOSN sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-XBLNR sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-BWTAR sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-LBKUM sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-WEBUD sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-KURSF sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-WWERT sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-KURST sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-KUFIX sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-OPEN_GRIR_AMOUNT sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-OPEN_GRIR_AMOUNT_LC sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-KZ sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-MEV_D_AD_ROOTWAERS sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-MEV_D_AD_ITEMORDER_UOM sy-vline 
WA_VMEV_D_AD_ITEM_MM_STR-MARAMEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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