ABAP Select data from SAP table R2PRO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP R2PRO 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 R2PRO. 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 R2PRO 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_R2PRO TYPE STANDARD TABLE OF R2PRO,
      WA_R2PRO TYPE R2PRO,
      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: <R2PRO> TYPE R2PRO.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_R2PRO.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM R2PRO
  INTO TABLE IT_R2PRO.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM R2PRO
*  INTO TABLE @DATA(IT_R2PRO2).
*--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_R2PRO INDEX 1 INTO DATA(WA_R2PRO2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_R2PRO ASSIGNING <R2PRO>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<R2PRO>-NAME = 1.
<R2PRO>-SQLX = 1.
<R2PRO>-EDTX = 1.
<R2PRO>-VARCL = 1.
<R2PRO>-DBAPL = 1.

ENDLOOP.

LOOP AT IT_R2PRO INTO WA_R2PRO.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_R2PRO-DBNA, sy-vline,
  WA_R2PRO-CLAS, sy-vline,
  WA_R2PRO-TYPE, sy-vline,
  WA_R2PRO-OCCURS, sy-vline,
  WA_R2PRO-SUBC, sy-vline,
  WA_R2PRO-APPL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_R2PRO 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_R2PRO 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_R2PRO INTO WA_R2PRO.


*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 ISOLA, internal->external for field RLOAD
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_R2PRO-RLOAD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_R2PRO-RLOAD.
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_R2PRO_STR, 
NAME TYPE STRING,
SQLX TYPE STRING,
EDTX TYPE STRING,
VARCL TYPE STRING,
DBAPL TYPE STRING,
DBNA TYPE STRING,
CLAS TYPE STRING,
TYPE TYPE STRING,
OCCURS TYPE STRING,
SUBC TYPE STRING,
APPL TYPE STRING,
SECU TYPE STRING,
CNAM TYPE STRING,
CDAT TYPE STRING,
UNAM TYPE STRING,
UDAT TYPE STRING,
VERN TYPE STRING,
LEVL TYPE STRING,
RSTAT TYPE STRING,
RMAND TYPE STRING,
RLOAD TYPE STRING,
FIXPT TYPE STRING,
SSET TYPE STRING,
RES4 TYPE STRING,
SDATE TYPE STRING,
STIME TYPE STRING,
IDATE TYPE STRING,
ITIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_R2PRO_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_R2PRO_STR-NAME sy-vline 
WA_R2PRO_STR-SQLX sy-vline 
WA_R2PRO_STR-EDTX sy-vline 
WA_R2PRO_STR-VARCL sy-vline 
WA_R2PRO_STR-DBAPL sy-vline 
WA_R2PRO_STR-DBNA sy-vline 
WA_R2PRO_STR-CLAS sy-vline 
WA_R2PRO_STR-TYPE sy-vline 
WA_R2PRO_STR-OCCURS sy-vline 
WA_R2PRO_STR-SUBC sy-vline 
WA_R2PRO_STR-APPL sy-vline 
WA_R2PRO_STR-SECU sy-vline 
WA_R2PRO_STR-CNAM sy-vline 
WA_R2PRO_STR-CDAT sy-vline 
WA_R2PRO_STR-UNAM sy-vline 
WA_R2PRO_STR-UDAT sy-vline 
WA_R2PRO_STR-VERN sy-vline 
WA_R2PRO_STR-LEVL sy-vline 
WA_R2PRO_STR-RSTAT sy-vline 
WA_R2PRO_STR-RMAND sy-vline 
WA_R2PRO_STR-RLOAD sy-vline 
WA_R2PRO_STR-FIXPT sy-vline 
WA_R2PRO_STR-SSET sy-vline 
WA_R2PRO_STR-RES4 sy-vline 
WA_R2PRO_STR-SDATE sy-vline 
WA_R2PRO_STR-STIME sy-vline 
WA_R2PRO_STR-IDATE sy-vline 
WA_R2PRO_STR-ITIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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