ABAP Select data from SAP table P01EL_MVDS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01EL_MVDS 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 P01EL_MVDS. 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 P01EL_MVDS 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_P01EL_MVDS TYPE STANDARD TABLE OF P01EL_MVDS,
      WA_P01EL_MVDS TYPE P01EL_MVDS,
      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: <P01EL_MVDS> TYPE P01EL_MVDS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01EL_MVDS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01EL_MVDS
  INTO TABLE IT_P01EL_MVDS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01EL_MVDS
*  INTO TABLE @DATA(IT_P01EL_MVDS2).
*--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_P01EL_MVDS INDEX 1 INTO DATA(WA_P01EL_MVDS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01EL_MVDS ASSIGNING <P01EL_MVDS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01EL_MVDS>-MANDT = 1.
<P01EL_MVDS>-GUID = 1.
<P01EL_MVDS>-VF = 1.
<P01EL_MVDS>-BBNRAB = 1.
<P01EL_MVDS>-BBNREP = 1.

ENDLOOP.

LOOP AT IT_P01EL_MVDS INTO WA_P01EL_MVDS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01EL_MVDS-VERNR, sy-vline,
  WA_P01EL_MVDS-ED, sy-vline,
  WA_P01EL_MVDS-FEKZ, sy-vline,
  WA_P01EL_MVDS-FEAN, sy-vline,
  WA_P01EL_MVDS-VSNRVFNR, sy-vline,
  WA_P01EL_MVDS-RESERVE1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01EL_MVDS 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_P01EL_MVDS 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_P01EL_MVDS INTO WA_P01EL_MVDS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P01EL_MVDS_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
VF TYPE STRING,
BBNRAB TYPE STRING,
BBNREP TYPE STRING,
VERNR TYPE STRING,
ED TYPE STRING,
FEKZ TYPE STRING,
FEAN TYPE STRING,
VSNRVFNR TYPE STRING,
RESERVE1 TYPE STRING,
BBNRVU TYPE STRING,
AZVU TYPE STRING,
BBNRKK TYPE STRING,
AZKK TYPE STRING,
BBNRAS TYPE STRING,
PERSGR TYPE STRING,
GD TYPE STRING,
SASC TYPE STRING,
BEAM TYPE STRING,
MONATBEG TYPE STRING,
MONATEND TYPE STRING,
BBNRALT TYPE STRING,
DSID TYPE STRING,
KENNZST TYPE STRING,
MMEN TYPE STRING,
MMNA TYPE STRING,
MMGB TYPE STRING,
MMAN TYPE STRING,
MMAG TYPE STRING,
MMAB TYPE STRING,
MMFZ TYPE STRING,
MMSE TYPE STRING,
MMSB TYPE STRING,
MMAS TYPE STRING,
MMZD TYPE STRING,
MMNB TYPE STRING,
MMHA TYPE STRING,
MMKE TYPE STRING,
RESERVE2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01EL_MVDS_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_P01EL_MVDS_STR-MANDT sy-vline 
WA_P01EL_MVDS_STR-GUID sy-vline 
WA_P01EL_MVDS_STR-VF sy-vline 
WA_P01EL_MVDS_STR-BBNRAB sy-vline 
WA_P01EL_MVDS_STR-BBNREP sy-vline 
WA_P01EL_MVDS_STR-VERNR sy-vline 
WA_P01EL_MVDS_STR-ED sy-vline 
WA_P01EL_MVDS_STR-FEKZ sy-vline 
WA_P01EL_MVDS_STR-FEAN sy-vline 
WA_P01EL_MVDS_STR-VSNRVFNR sy-vline 
WA_P01EL_MVDS_STR-RESERVE1 sy-vline 
WA_P01EL_MVDS_STR-BBNRVU sy-vline 
WA_P01EL_MVDS_STR-AZVU sy-vline 
WA_P01EL_MVDS_STR-BBNRKK sy-vline 
WA_P01EL_MVDS_STR-AZKK sy-vline 
WA_P01EL_MVDS_STR-BBNRAS sy-vline 
WA_P01EL_MVDS_STR-PERSGR sy-vline 
WA_P01EL_MVDS_STR-GD sy-vline 
WA_P01EL_MVDS_STR-SASC sy-vline 
WA_P01EL_MVDS_STR-BEAM sy-vline 
WA_P01EL_MVDS_STR-MONATBEG sy-vline 
WA_P01EL_MVDS_STR-MONATEND sy-vline 
WA_P01EL_MVDS_STR-BBNRALT sy-vline 
WA_P01EL_MVDS_STR-DSID sy-vline 
WA_P01EL_MVDS_STR-KENNZST sy-vline 
WA_P01EL_MVDS_STR-MMEN sy-vline 
WA_P01EL_MVDS_STR-MMNA sy-vline 
WA_P01EL_MVDS_STR-MMGB sy-vline 
WA_P01EL_MVDS_STR-MMAN sy-vline 
WA_P01EL_MVDS_STR-MMAG sy-vline 
WA_P01EL_MVDS_STR-MMAB sy-vline 
WA_P01EL_MVDS_STR-MMFZ sy-vline 
WA_P01EL_MVDS_STR-MMSE sy-vline 
WA_P01EL_MVDS_STR-MMSB sy-vline 
WA_P01EL_MVDS_STR-MMAS sy-vline 
WA_P01EL_MVDS_STR-MMZD sy-vline 
WA_P01EL_MVDS_STR-MMNB sy-vline 
WA_P01EL_MVDS_STR-MMHA sy-vline 
WA_P01EL_MVDS_STR-MMKE sy-vline 
WA_P01EL_MVDS_STR-RESERVE2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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