ABAP Select data from SAP table MPFA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPFA
*  INTO TABLE @DATA(IT_MPFA2).
*--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_MPFA INDEX 1 INTO DATA(WA_MPFA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPFA>-AUFNR = 1.
<MPFA>-POSNR = 1.
<MPFA>-WERKS = 1.
<MPFA>-PWWRK = 1.
<MPFA>-AUART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPFA-AUTYP, sy-vline,
  WA_MPFA-MATNR, sy-vline,
  WA_MPFA-GAMNG, sy-vline,
  WA_MPFA-GASMG, sy-vline,
  WA_MPFA-WEMNG, sy-vline,
  WA_MPFA-IAMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPFA 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_MPFA 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_MPFA INTO WA_MPFA.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MPFA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPFA-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPFA-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPFA-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MPFA-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPFA-PSPEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPFA-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPFA-KUNNR.
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_MPFA_STR, 
AUFNR TYPE STRING,
POSNR TYPE STRING,
WERKS TYPE STRING,
PWWRK TYPE STRING,
AUART TYPE STRING,
AUTYP TYPE STRING,
MATNR TYPE STRING,
GAMNG TYPE STRING,
GASMG TYPE STRING,
WEMNG TYPE STRING,
IAMNG TYPE STRING,
GMEIN TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
GSTRP TYPE STRING,
GLTRP TYPE STRING,
WEBAZ TYPE STRING,
TERKZ TYPE STRING,
LGORT TYPE STRING,
KNTTP TYPE STRING,
SOBKZ TYPE STRING,
KZVBR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PSPEL TYPE STRING,
VERID TYPE STRING,
VERTO TYPE STRING,
KZTECHAB TYPE STRING,
KZLOEVM TYPE STRING,
KZLOEKZ TYPE STRING,
KZGESP TYPE STRING,
KUNNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPFA_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_MPFA_STR-AUFNR sy-vline 
WA_MPFA_STR-POSNR sy-vline 
WA_MPFA_STR-WERKS sy-vline 
WA_MPFA_STR-PWWRK sy-vline 
WA_MPFA_STR-AUART sy-vline 
WA_MPFA_STR-AUTYP sy-vline 
WA_MPFA_STR-MATNR sy-vline 
WA_MPFA_STR-GAMNG sy-vline 
WA_MPFA_STR-GASMG sy-vline 
WA_MPFA_STR-WEMNG sy-vline 
WA_MPFA_STR-IAMNG sy-vline 
WA_MPFA_STR-GMEIN sy-vline 
WA_MPFA_STR-UMREZ sy-vline 
WA_MPFA_STR-UMREN sy-vline 
WA_MPFA_STR-GSTRP sy-vline 
WA_MPFA_STR-GLTRP sy-vline 
WA_MPFA_STR-WEBAZ sy-vline 
WA_MPFA_STR-TERKZ sy-vline 
WA_MPFA_STR-LGORT sy-vline 
WA_MPFA_STR-KNTTP sy-vline 
WA_MPFA_STR-SOBKZ sy-vline 
WA_MPFA_STR-KZVBR sy-vline 
WA_MPFA_STR-KDAUF sy-vline 
WA_MPFA_STR-KDPOS sy-vline 
WA_MPFA_STR-PSPEL sy-vline 
WA_MPFA_STR-VERID sy-vline 
WA_MPFA_STR-VERTO sy-vline 
WA_MPFA_STR-KZTECHAB sy-vline 
WA_MPFA_STR-KZLOEVM sy-vline 
WA_MPFA_STR-KZLOEKZ sy-vline 
WA_MPFA_STR-KZGESP sy-vline 
WA_MPFA_STR-KUNNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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