ABAP Select data from SAP table V_MRP_AFPO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_MRP_AFPO
*  INTO TABLE @DATA(IT_V_MRP_AFPO2).
*--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_V_MRP_AFPO INDEX 1 INTO DATA(WA_V_MRP_AFPO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_MRP_AFPO>-MANDT = 1.
<V_MRP_AFPO>-AUFNR = 1.
<V_MRP_AFPO>-POSNR = 1.
<V_MRP_AFPO>-PWERK = 1.
<V_MRP_AFPO>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_MRP_AFPO-MEINS, sy-vline,
  WA_V_MRP_AFPO-DAUTY, sy-vline,
  WA_V_MRP_AFPO-DAUAT, sy-vline,
  WA_V_MRP_AFPO-DWERK, sy-vline,
  WA_V_MRP_AFPO-PSMNG, sy-vline,
  WA_V_MRP_AFPO-WEMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_MRP_AFPO 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_V_MRP_AFPO 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_V_MRP_AFPO INTO WA_V_MRP_AFPO.


*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_V_MRP_AFPO-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_AFPO-AUFNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_AFPO-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_AFPO-PROJN.
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_V_MRP_AFPO_STR, 
MANDT TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
PWERK TYPE STRING,
MATNR TYPE STRING,
MEINS TYPE STRING,
DAUTY TYPE STRING,
DAUAT TYPE STRING,
DWERK TYPE STRING,
PSMNG TYPE STRING,
WEMNG TYPE STRING,
IAMNG TYPE STRING,
AMEIN TYPE STRING,
UMREN TYPE STRING,
UMREZ TYPE STRING,
DGLTP TYPE STRING,
LTRMI TYPE STRING,
WEBAZ TYPE STRING,
LGORT TYPE STRING,
VERID TYPE STRING,
DFREI TYPE STRING,
DNREL TYPE STRING,
ELIKZ TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PROJN TYPE STRING,
SOBKZ TYPE STRING,
KZVBR TYPE STRING,
ARSNR TYPE STRING,
ARSPS TYPE STRING,
BERID TYPE STRING,
PLAAB TYPE STRING,
PLANR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_MRP_AFPO_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_V_MRP_AFPO_STR-MANDT sy-vline 
WA_V_MRP_AFPO_STR-AUFNR sy-vline 
WA_V_MRP_AFPO_STR-POSNR sy-vline 
WA_V_MRP_AFPO_STR-PWERK sy-vline 
WA_V_MRP_AFPO_STR-MATNR sy-vline 
WA_V_MRP_AFPO_STR-MEINS sy-vline 
WA_V_MRP_AFPO_STR-DAUTY sy-vline 
WA_V_MRP_AFPO_STR-DAUAT sy-vline 
WA_V_MRP_AFPO_STR-DWERK sy-vline 
WA_V_MRP_AFPO_STR-PSMNG sy-vline 
WA_V_MRP_AFPO_STR-WEMNG sy-vline 
WA_V_MRP_AFPO_STR-IAMNG sy-vline 
WA_V_MRP_AFPO_STR-AMEIN sy-vline 
WA_V_MRP_AFPO_STR-UMREN sy-vline 
WA_V_MRP_AFPO_STR-UMREZ sy-vline 
WA_V_MRP_AFPO_STR-DGLTP sy-vline 
WA_V_MRP_AFPO_STR-LTRMI sy-vline 
WA_V_MRP_AFPO_STR-WEBAZ sy-vline 
WA_V_MRP_AFPO_STR-LGORT sy-vline 
WA_V_MRP_AFPO_STR-VERID sy-vline 
WA_V_MRP_AFPO_STR-DFREI sy-vline 
WA_V_MRP_AFPO_STR-DNREL sy-vline 
WA_V_MRP_AFPO_STR-ELIKZ sy-vline 
WA_V_MRP_AFPO_STR-KDAUF sy-vline 
WA_V_MRP_AFPO_STR-KDPOS sy-vline 
WA_V_MRP_AFPO_STR-PROJN sy-vline 
WA_V_MRP_AFPO_STR-SOBKZ sy-vline 
WA_V_MRP_AFPO_STR-KZVBR sy-vline 
WA_V_MRP_AFPO_STR-ARSNR sy-vline 
WA_V_MRP_AFPO_STR-ARSPS sy-vline 
WA_V_MRP_AFPO_STR-BERID sy-vline 
WA_V_MRP_AFPO_STR-PLAAB sy-vline 
WA_V_MRP_AFPO_STR-PLANR sy-vline      INTO ld_text SEPARATED BY SPACE.

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