ABAP Select data from SAP table /SAPAPO/MSDP_ARCMAT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/MSDP_ARCMAT 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 /SAPAPO/MSDP_ARCMAT. 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 /SAPAPO/MSDP_ARCMAT 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_/SAPAPO/MSDP_ARCMAT TYPE STANDARD TABLE OF /SAPAPO/MSDP_ARCMAT,
      WA_/SAPAPO/MSDP_ARCMAT TYPE /SAPAPO/MSDP_ARCMAT,
      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: </SAPAPO/MSDP_ARCMAT> TYPE /SAPAPO/MSDP_ARCMAT.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/MSDP_ARCMAT
  INTO TABLE IT_/SAPAPO/MSDP_ARCMAT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/MSDP_ARCMAT
*  INTO TABLE @DATA(IT_/SAPAPO/MSDP_ARCMAT2).
*--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_/SAPAPO/MSDP_ARCMAT INDEX 1 INTO DATA(WA_/SAPAPO/MSDP_ARCMAT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/MSDP_ARCMAT ASSIGNING </SAPAPO/MSDP_ARCMAT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/MSDP_ARCMAT>-LOCFR = 1.
</SAPAPO/MSDP_ARCMAT>-LOCTO = 1.
</SAPAPO/MSDP_ARCMAT>-MATID = 1.
</SAPAPO/MSDP_ARCMAT>-TTYPE = 1.
</SAPAPO/MSDP_ARCMAT>-TPRIO = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/MSDP_ARCMAT INTO WA_/SAPAPO/MSDP_ARCMAT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/MSDP_ARCMAT-RESUID, sy-vline,
  WA_/SAPAPO/MSDP_ARCMAT-DESCR40, sy-vline,
  WA_/SAPAPO/MSDP_ARCMAT-QTDIR, sy-vline,
  WA_/SAPAPO/MSDP_ARCMAT-QUOTA, sy-vline,
  WA_/SAPAPO/MSDP_ARCMAT-SPRIO, sy-vline,
  WA_/SAPAPO/MSDP_ARCMAT-CACON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/MSDP_ARCMAT 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_/SAPAPO/MSDP_ARCMAT 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_/SAPAPO/MSDP_ARCMAT INTO WA_/SAPAPO/MSDP_ARCMAT.


*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 UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MSDP_ARCMAT-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MSDP_ARCMAT-UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSZID, internal->external for field TSZID
CALL FUNCTION 'CONVERSION_EXIT_TSZID_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MSDP_ARCMAT-TSZID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MSDP_ARCMAT-TSZID.
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_/SAPAPO/MSDP_ARCMAT_STR, 
LOCFR TYPE STRING,
LOCTO TYPE STRING,
MATID TYPE STRING,
TTYPE TYPE STRING,
TPRIO TYPE STRING,
RESUID TYPE STRING,
DESCR40 TYPE STRING,
QTDIR TYPE STRING,
QUOTA TYPE STRING,
SPRIO TYPE STRING,
CACON TYPE STRING,
UNIT TYPE STRING,
COSID TYPE STRING,
MANDT TYPE STRING,
TSZID TYPE STRING,
TSZEX TYPE STRING,
TSZTX TYPE STRING,
BSTMI TYPE STRING,
BSTMA TYPE STRING,
BSTRF TYPE STRING,
RDPRF TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
STFAC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/MSDP_ARCMAT_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_/SAPAPO/MSDP_ARCMAT_STR-LOCFR sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-LOCTO sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-MATID sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-TTYPE sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-TPRIO sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-RESUID sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-DESCR40 sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-QTDIR sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-QUOTA sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-SPRIO sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-CACON sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-UNIT sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-COSID sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-MANDT sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-TSZID sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-TSZEX sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-TSZTX sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-BSTMI sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-BSTMA sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-BSTRF sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-RDPRF sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-VALFR sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-VALTO sy-vline 
WA_/SAPAPO/MSDP_ARCMAT_STR-STFAC sy-vline      INTO ld_text SEPARATED BY SPACE.

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