ABAP Select data from SAP table R2GRITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP R2GRITEM 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 R2GRITEM. 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 R2GRITEM 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_R2GRITEM TYPE STANDARD TABLE OF R2GRITEM,
      WA_R2GRITEM TYPE R2GRITEM,
      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: <R2GRITEM> TYPE R2GRITEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_R2GRITEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM R2GRITEM
  INTO TABLE IT_R2GRITEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM R2GRITEM
*  INTO TABLE @DATA(IT_R2GRITEM2).
*--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_R2GRITEM INDEX 1 INTO DATA(WA_R2GRITEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_R2GRITEM ASSIGNING <R2GRITEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<R2GRITEM>-ARTNR = 1.
<R2GRITEM>-WERKS = 1.
<R2GRITEM>-LGORT = 1.
<R2GRITEM>-GEBNR = 1.
<R2GRITEM>-BWART = 1.

ENDLOOP.

LOOP AT IT_R2GRITEM INTO WA_R2GRITEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_R2GRITEM-INSMK, sy-vline,
  WA_R2GRITEM-LIFNR, sy-vline,
  WA_R2GRITEM-BWTAR, sy-vline,
  WA_R2GRITEM-MENGE, sy-vline,
  WA_R2GRITEM-BPMNG, sy-vline,
  WA_R2GRITEM-BSTNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_R2GRITEM 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_R2GRITEM 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_R2GRITEM INTO WA_R2GRITEM.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_R2GRITEM_STR, 
ARTNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
GEBNR TYPE STRING,
BWART TYPE STRING,
INSMK TYPE STRING,
LIFNR TYPE STRING,
BWTAR TYPE STRING,
MENGE TYPE STRING,
BPMNG TYPE STRING,
BSTNR TYPE STRING,
BSTPO TYPE STRING,
VEREH TYPE STRING,
ELIKZ TYPE STRING,
SGTXT TYPE STRING,
ABLAD TYPE STRING,
MEINS TYPE STRING,
BPRME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_R2GRITEM_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_R2GRITEM_STR-ARTNR sy-vline 
WA_R2GRITEM_STR-WERKS sy-vline 
WA_R2GRITEM_STR-LGORT sy-vline 
WA_R2GRITEM_STR-GEBNR sy-vline 
WA_R2GRITEM_STR-BWART sy-vline 
WA_R2GRITEM_STR-INSMK sy-vline 
WA_R2GRITEM_STR-LIFNR sy-vline 
WA_R2GRITEM_STR-BWTAR sy-vline 
WA_R2GRITEM_STR-MENGE sy-vline 
WA_R2GRITEM_STR-BPMNG sy-vline 
WA_R2GRITEM_STR-BSTNR sy-vline 
WA_R2GRITEM_STR-BSTPO sy-vline 
WA_R2GRITEM_STR-VEREH sy-vline 
WA_R2GRITEM_STR-ELIKZ sy-vline 
WA_R2GRITEM_STR-SGTXT sy-vline 
WA_R2GRITEM_STR-ABLAD sy-vline 
WA_R2GRITEM_STR-MEINS sy-vline 
WA_R2GRITEM_STR-BPRME sy-vline      INTO ld_text SEPARATED BY SPACE.

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