ABAP Select data from SAP table MPN_BILD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPN_BILD
*  INTO TABLE @DATA(IT_MPN_BILD2).
*--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_MPN_BILD INDEX 1 INTO DATA(WA_MPN_BILD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPN_BILD>-ZEILE = 1.
<MPN_BILD>-ERFMG = 1.
<MPN_BILD>-ERFME = 1.
<MPN_BILD>-MATNR = 1.
<MPN_BILD>-CHARG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPN_BILD-LGORT, sy-vline,
  WA_MPN_BILD-WERKS, sy-vline,
  WA_MPN_BILD-RSPOS, sy-vline,
  WA_MPN_BILD-KZEAR, sy-vline,
  WA_MPN_BILD-XAUTO, sy-vline,
  WA_MPN_BILD-URZEI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPN_BILD 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_MPN_BILD 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_MPN_BILD INTO WA_MPN_BILD.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MPN_BILD-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPN_BILD-MATNR.
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_MPN_BILD_STR, 
ZEILE TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
LGORT TYPE STRING,
WERKS TYPE STRING,
RSPOS TYPE STRING,
KZEAR TYPE STRING,
XAUTO TYPE STRING,
URZEI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPN_BILD_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_MPN_BILD_STR-ZEILE sy-vline 
WA_MPN_BILD_STR-ERFMG sy-vline 
WA_MPN_BILD_STR-ERFME sy-vline 
WA_MPN_BILD_STR-MATNR sy-vline 
WA_MPN_BILD_STR-CHARG sy-vline 
WA_MPN_BILD_STR-LGORT sy-vline 
WA_MPN_BILD_STR-WERKS sy-vline 
WA_MPN_BILD_STR-RSPOS sy-vline 
WA_MPN_BILD_STR-KZEAR sy-vline 
WA_MPN_BILD_STR-XAUTO sy-vline 
WA_MPN_BILD_STR-URZEI sy-vline      INTO ld_text SEPARATED BY SPACE.

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