ABAP Select data from SAP table DMF_S_PURCH_ORDR_GDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMF_S_PURCH_ORDR_GDR
*  INTO TABLE @DATA(IT_DMF_S_PURCH_ORDR_GDR2).
*--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_DMF_S_PURCH_ORDR_GDR INDEX 1 INTO DATA(WA_DMF_S_PURCH_ORDR_GDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMF_S_PURCH_ORDR_GDR>-NO_MATERIAL_DOCUMENT = 1.
<DMF_S_PURCH_ORDR_GDR>-MATERIAL_DOCUMENT_YEAR = 1.
<DMF_S_PURCH_ORDR_GDR>-ITEM_MATERIAL_DOCUMENT = 1.
<DMF_S_PURCH_ORDR_GDR>-PO_DOC_NUMBER = 1.
<DMF_S_PURCH_ORDR_GDR>-PO_ITEM_NUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMF_S_PURCH_ORDR_GDR-QUANTITY, sy-vline,
  WA_DMF_S_PURCH_ORDR_GDR-QUANTITY_UOM, sy-vline,
  WA_DMF_S_PURCH_ORDR_GDR-GOODS_AMOUNT, sy-vline,
  WA_DMF_S_PURCH_ORDR_GDR-AMOUNT_CURRENCY, sy-vline,
  WA_DMF_S_PURCH_ORDR_GDR-POSTING_DATE, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_DMF_S_PURCH_ORDR_GDR 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_DMF_S_PURCH_ORDR_GDR 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_DMF_S_PURCH_ORDR_GDR INTO WA_DMF_S_PURCH_ORDR_GDR.


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

*Conversion exit GJAHR, internal->external for field MATERIAL_DOCUMENT_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_DMF_S_PURCH_ORDR_GDR-MATERIAL_DOCUMENT_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMF_S_PURCH_ORDR_GDR-MATERIAL_DOCUMENT_YEAR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field QUANTITY_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DMF_S_PURCH_ORDR_GDR-QUANTITY_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DMF_S_PURCH_ORDR_GDR-QUANTITY_UOM.
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_DMF_S_PURCH_ORDR_GDR_STR, 
NO_MATERIAL_DOCUMENT TYPE STRING,
MATERIAL_DOCUMENT_YEAR TYPE STRING,
ITEM_MATERIAL_DOCUMENT TYPE STRING,
PO_DOC_NUMBER TYPE STRING,
PO_ITEM_NUMBER TYPE STRING,
QUANTITY TYPE STRING,
QUANTITY_UOM TYPE STRING,
GOODS_AMOUNT TYPE STRING,
AMOUNT_CURRENCY TYPE STRING,
POSTING_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMF_S_PURCH_ORDR_GDR_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_DMF_S_PURCH_ORDR_GDR_STR-NO_MATERIAL_DOCUMENT sy-vline 
WA_DMF_S_PURCH_ORDR_GDR_STR-MATERIAL_DOCUMENT_YEAR sy-vline 
WA_DMF_S_PURCH_ORDR_GDR_STR-ITEM_MATERIAL_DOCUMENT sy-vline 
WA_DMF_S_PURCH_ORDR_GDR_STR-PO_DOC_NUMBER sy-vline 
WA_DMF_S_PURCH_ORDR_GDR_STR-PO_ITEM_NUMBER sy-vline 
WA_DMF_S_PURCH_ORDR_GDR_STR-QUANTITY sy-vline 
WA_DMF_S_PURCH_ORDR_GDR_STR-QUANTITY_UOM sy-vline 
WA_DMF_S_PURCH_ORDR_GDR_STR-GOODS_AMOUNT sy-vline 
WA_DMF_S_PURCH_ORDR_GDR_STR-AMOUNT_CURRENCY sy-vline 
WA_DMF_S_PURCH_ORDR_GDR_STR-POSTING_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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