ABAP Select data from SAP table E2MVKEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2MVKEM 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 E2MVKEM. 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 E2MVKEM 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_E2MVKEM TYPE STANDARD TABLE OF E2MVKEM,
      WA_E2MVKEM TYPE E2MVKEM,
      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: <E2MVKEM> TYPE E2MVKEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2MVKEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2MVKEM
  INTO TABLE IT_E2MVKEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2MVKEM
*  INTO TABLE @DATA(IT_E2MVKEM2).
*--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_E2MVKEM INDEX 1 INTO DATA(WA_E2MVKEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2MVKEM ASSIGNING <E2MVKEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2MVKEM>-MSGFN = 1.
<E2MVKEM>-VKORG = 1.
<E2MVKEM>-VTWEG = 1.
<E2MVKEM>-LVORM = 1.
<E2MVKEM>-VERSG = 1.

ENDLOOP.

LOOP AT IT_E2MVKEM INTO WA_E2MVKEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2MVKEM-BONUS, sy-vline,
  WA_E2MVKEM-PROVG, sy-vline,
  WA_E2MVKEM-SKTOF, sy-vline,
  WA_E2MVKEM-VMSTA, sy-vline,
  WA_E2MVKEM-VMSTD, sy-vline,
  WA_E2MVKEM-AUMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2MVKEM 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_E2MVKEM 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_E2MVKEM INTO WA_E2MVKEM.


*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 PMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_E2MVKEM-PMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2MVKEM-PMATN.
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_E2MVKEM_STR, 
MSGFN TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
LVORM TYPE STRING,
VERSG TYPE STRING,
BONUS TYPE STRING,
PROVG TYPE STRING,
SKTOF TYPE STRING,
VMSTA TYPE STRING,
VMSTD TYPE STRING,
AUMNG TYPE STRING,
LFMNG TYPE STRING,
EFMNG TYPE STRING,
SCMNG TYPE STRING,
SCHME TYPE STRING,
VRKME TYPE STRING,
MTPOS TYPE STRING,
DWERK TYPE STRING,
PRODH TYPE STRING,
PMATN TYPE STRING,
KONDM TYPE STRING,
KTGRM TYPE STRING,
MVGR1 TYPE STRING,
MVGR2 TYPE STRING,
MVGR3 TYPE STRING,
MVGR4 TYPE STRING,
MVGR5 TYPE STRING,
SSTUF TYPE STRING,
PFLKS TYPE STRING,
LSTFL TYPE STRING,
LSTVZ TYPE STRING,
LSTAK TYPE STRING,
PRAT1 TYPE STRING,
PRAT2 TYPE STRING,
PRAT3 TYPE STRING,
PRAT4 TYPE STRING,
PRAT5 TYPE STRING,
PRAT6 TYPE STRING,
PRAT7 TYPE STRING,
PRAT8 TYPE STRING,
PRAT9 TYPE STRING,
PRATA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2MVKEM_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_E2MVKEM_STR-MSGFN sy-vline 
WA_E2MVKEM_STR-VKORG sy-vline 
WA_E2MVKEM_STR-VTWEG sy-vline 
WA_E2MVKEM_STR-LVORM sy-vline 
WA_E2MVKEM_STR-VERSG sy-vline 
WA_E2MVKEM_STR-BONUS sy-vline 
WA_E2MVKEM_STR-PROVG sy-vline 
WA_E2MVKEM_STR-SKTOF sy-vline 
WA_E2MVKEM_STR-VMSTA sy-vline 
WA_E2MVKEM_STR-VMSTD sy-vline 
WA_E2MVKEM_STR-AUMNG sy-vline 
WA_E2MVKEM_STR-LFMNG sy-vline 
WA_E2MVKEM_STR-EFMNG sy-vline 
WA_E2MVKEM_STR-SCMNG sy-vline 
WA_E2MVKEM_STR-SCHME sy-vline 
WA_E2MVKEM_STR-VRKME sy-vline 
WA_E2MVKEM_STR-MTPOS sy-vline 
WA_E2MVKEM_STR-DWERK sy-vline 
WA_E2MVKEM_STR-PRODH sy-vline 
WA_E2MVKEM_STR-PMATN sy-vline 
WA_E2MVKEM_STR-KONDM sy-vline 
WA_E2MVKEM_STR-KTGRM sy-vline 
WA_E2MVKEM_STR-MVGR1 sy-vline 
WA_E2MVKEM_STR-MVGR2 sy-vline 
WA_E2MVKEM_STR-MVGR3 sy-vline 
WA_E2MVKEM_STR-MVGR4 sy-vline 
WA_E2MVKEM_STR-MVGR5 sy-vline 
WA_E2MVKEM_STR-SSTUF sy-vline 
WA_E2MVKEM_STR-PFLKS sy-vline 
WA_E2MVKEM_STR-LSTFL sy-vline 
WA_E2MVKEM_STR-LSTVZ sy-vline 
WA_E2MVKEM_STR-LSTAK sy-vline 
WA_E2MVKEM_STR-PRAT1 sy-vline 
WA_E2MVKEM_STR-PRAT2 sy-vline 
WA_E2MVKEM_STR-PRAT3 sy-vline 
WA_E2MVKEM_STR-PRAT4 sy-vline 
WA_E2MVKEM_STR-PRAT5 sy-vline 
WA_E2MVKEM_STR-PRAT6 sy-vline 
WA_E2MVKEM_STR-PRAT7 sy-vline 
WA_E2MVKEM_STR-PRAT8 sy-vline 
WA_E2MVKEM_STR-PRAT9 sy-vline 
WA_E2MVKEM_STR-PRATA sy-vline      INTO ld_text SEPARATED BY SPACE.

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