ABAP Select data from SAP table RAPAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RAPAR
*  INTO TABLE @DATA(IT_RAPAR2).
*--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_RAPAR INDEX 1 INTO DATA(WA_RAPAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RAPAR>-TEST = 1.
<RAPAR>-GJAHR = 1.
<RAPAR>-PRTKLL = 1.
<RAPAR>-XMITBCH = 1.
<RAPAR>-XTEST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RAPAR-XHELL, sy-vline,
  WA_RAPAR-DSNIN, sy-vline,
  WA_RAPAR-DSNOUT, sy-vline,
  WA_RAPAR-XSTRU, sy-vline,
  WA_RAPAR-MAPPE, sy-vline,
  WA_RAPAR-ANZER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RAPAR 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_RAPAR 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_RAPAR INTO WA_RAPAR.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RAPAR-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RAPAR-GJAHR.
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_RAPAR_STR, 
TEST TYPE STRING,
GJAHR TYPE STRING,
PRTKLL TYPE STRING,
XMITBCH TYPE STRING,
XTEST TYPE STRING,
XHELL TYPE STRING,
DSNIN TYPE STRING,
DSNOUT TYPE STRING,
XSTRU TYPE STRING,
MAPPE TYPE STRING,
ANZER TYPE STRING,
ANZSA TYPE STRING,
FEHL TYPE STRING,
XDUPPL TYPE STRING,
XMEHR TYPE STRING,
XRESTA TYPE STRING,
XRESTM TYPE STRING,
MORE TYPE STRING,
XVAL TYPE STRING,
XSUBST TYPE STRING,
XCOPY TYPE STRING,
FORM TYPE STRING,
XINIT TYPE STRING,
XANLKL TYPE STRING,
RAAEND_INS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RAPAR_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_RAPAR_STR-TEST sy-vline 
WA_RAPAR_STR-GJAHR sy-vline 
WA_RAPAR_STR-PRTKLL sy-vline 
WA_RAPAR_STR-XMITBCH sy-vline 
WA_RAPAR_STR-XTEST sy-vline 
WA_RAPAR_STR-XHELL sy-vline 
WA_RAPAR_STR-DSNIN sy-vline 
WA_RAPAR_STR-DSNOUT sy-vline 
WA_RAPAR_STR-XSTRU sy-vline 
WA_RAPAR_STR-MAPPE sy-vline 
WA_RAPAR_STR-ANZER sy-vline 
WA_RAPAR_STR-ANZSA sy-vline 
WA_RAPAR_STR-FEHL sy-vline 
WA_RAPAR_STR-XDUPPL sy-vline 
WA_RAPAR_STR-XMEHR sy-vline 
WA_RAPAR_STR-XRESTA sy-vline 
WA_RAPAR_STR-XRESTM sy-vline 
WA_RAPAR_STR-MORE sy-vline 
WA_RAPAR_STR-XVAL sy-vline 
WA_RAPAR_STR-XSUBST sy-vline 
WA_RAPAR_STR-XCOPY sy-vline 
WA_RAPAR_STR-FORM sy-vline 
WA_RAPAR_STR-XINIT sy-vline 
WA_RAPAR_STR-XANLKL sy-vline 
WA_RAPAR_STR-RAAEND_INS sy-vline      INTO ld_text SEPARATED BY SPACE.

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