ABAP Select data from SAP table RNPLR_RELSE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPLR_RELSE
*  INTO TABLE @DATA(IT_RNPLR_RELSE2).
*--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_RNPLR_RELSE INDEX 1 INTO DATA(WA_RNPLR_RELSE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPLR_RELSE>-CLIENT = 1.
<RNPLR_RELSE>-RELNR = 1.
<RNPLR_RELSE>-PARTNER1 = 1.
<RNPLR_RELSE>-PARTNER2 = 1.
<RNPLR_RELSE>-DATE_TO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPLR_RELSE-DATE_FROM, sy-vline,
  WA_RNPLR_RELSE-RELTYP, sy-vline,
  WA_RNPLR_RELSE-XRF, sy-vline,
  WA_RNPLR_RELSE-DFTVAL, sy-vline,
  WA_RNPLR_RELSE-RLTYP, sy-vline,
  WA_RNPLR_RELSE-RELKIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPLR_RELSE 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_RNPLR_RELSE 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_RNPLR_RELSE INTO WA_RNPLR_RELSE.


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

*Conversion exit ALPHA, internal->external for field PARTNER1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPLR_RELSE-PARTNER1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPLR_RELSE-PARTNER1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPLR_RELSE-PARTNER2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPLR_RELSE-PARTNER2.
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_RNPLR_RELSE_STR, 
CLIENT TYPE STRING,
RELNR TYPE STRING,
PARTNER1 TYPE STRING,
PARTNER2 TYPE STRING,
DATE_TO TYPE STRING,
DATE_FROM TYPE STRING,
RELTYP TYPE STRING,
XRF TYPE STRING,
DFTVAL TYPE STRING,
RLTYP TYPE STRING,
RELKIND TYPE STRING,
CRUSR TYPE STRING,
CRDAT TYPE STRING,
CRTIM TYPE STRING,
CHUSR TYPE STRING,
CHDAT TYPE STRING,
CHTIM TYPE STRING,
XDFREL TYPE STRING,
XDFREL2 TYPE STRING,
DB_KEY TYPE STRING,
DB_KEY_TD TYPE STRING,
XATTR TYPE STRING,
XMUST TYPE STRING,
XDONE TYPE STRING,
XDIRECTION TYPE STRING,
XENQ_R TYPE STRING,
XENQ_P TYPE STRING,
XCHNG TYPE STRING,
XFMOD TYPE STRING,
RELSHIP_CHIND TYPE STRING,
FROM_DATE TYPE STRING,
KIND_PROC TYPE STRING,
RANGE_PROC TYPE STRING,
DESC_PROC TYPE STRING,
DESC_PROC_L TYPE STRING,
DESC_PROC_LNUM TYPE STRING,
DATE_TOX TYPE STRING,
DATE_FROMX TYPE STRING,
RELTYPX TYPE STRING,
DFTVALX TYPE STRING,
RLTYPX TYPE STRING,
RELKINDX TYPE STRING,
XDFRELX TYPE STRING,
XATTRX TYPE STRING,
XMUSTX TYPE STRING,
XDONEX TYPE STRING,
XDIRECTIONX TYPE STRING,
XENQ_RX TYPE STRING,
XENQ_PX TYPE STRING,
XCHNGX TYPE STRING,
XFMODX TYPE STRING,
RELSHIP_CHINDX TYPE STRING,
KIND_PROCX TYPE STRING,
RANGE_PROCX TYPE STRING,
DESC_PROCX TYPE STRING,
DESC_PROC_LX TYPE STRING,
ACTION_CODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPLR_RELSE_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_RNPLR_RELSE_STR-CLIENT sy-vline 
WA_RNPLR_RELSE_STR-RELNR sy-vline 
WA_RNPLR_RELSE_STR-PARTNER1 sy-vline 
WA_RNPLR_RELSE_STR-PARTNER2 sy-vline 
WA_RNPLR_RELSE_STR-DATE_TO sy-vline 
WA_RNPLR_RELSE_STR-DATE_FROM sy-vline 
WA_RNPLR_RELSE_STR-RELTYP sy-vline 
WA_RNPLR_RELSE_STR-XRF sy-vline 
WA_RNPLR_RELSE_STR-DFTVAL sy-vline 
WA_RNPLR_RELSE_STR-RLTYP sy-vline 
WA_RNPLR_RELSE_STR-RELKIND sy-vline 
WA_RNPLR_RELSE_STR-CRUSR sy-vline 
WA_RNPLR_RELSE_STR-CRDAT sy-vline 
WA_RNPLR_RELSE_STR-CRTIM sy-vline 
WA_RNPLR_RELSE_STR-CHUSR sy-vline 
WA_RNPLR_RELSE_STR-CHDAT sy-vline 
WA_RNPLR_RELSE_STR-CHTIM sy-vline 
WA_RNPLR_RELSE_STR-XDFREL sy-vline 
WA_RNPLR_RELSE_STR-XDFREL2 sy-vline 
WA_RNPLR_RELSE_STR-DB_KEY sy-vline 
WA_RNPLR_RELSE_STR-DB_KEY_TD sy-vline 
WA_RNPLR_RELSE_STR-XATTR sy-vline 
WA_RNPLR_RELSE_STR-XMUST sy-vline 
WA_RNPLR_RELSE_STR-XDONE sy-vline 
WA_RNPLR_RELSE_STR-XDIRECTION sy-vline 
WA_RNPLR_RELSE_STR-XENQ_R sy-vline 
WA_RNPLR_RELSE_STR-XENQ_P sy-vline 
WA_RNPLR_RELSE_STR-XCHNG sy-vline 
WA_RNPLR_RELSE_STR-XFMOD sy-vline 
WA_RNPLR_RELSE_STR-RELSHIP_CHIND sy-vline 
WA_RNPLR_RELSE_STR-FROM_DATE sy-vline 
WA_RNPLR_RELSE_STR-KIND_PROC sy-vline 
WA_RNPLR_RELSE_STR-RANGE_PROC sy-vline 
WA_RNPLR_RELSE_STR-DESC_PROC sy-vline 
WA_RNPLR_RELSE_STR-DESC_PROC_L sy-vline 
WA_RNPLR_RELSE_STR-DESC_PROC_LNUM sy-vline 
WA_RNPLR_RELSE_STR-DATE_TOX sy-vline 
WA_RNPLR_RELSE_STR-DATE_FROMX sy-vline 
WA_RNPLR_RELSE_STR-RELTYPX sy-vline 
WA_RNPLR_RELSE_STR-DFTVALX sy-vline 
WA_RNPLR_RELSE_STR-RLTYPX sy-vline 
WA_RNPLR_RELSE_STR-RELKINDX sy-vline 
WA_RNPLR_RELSE_STR-XDFRELX sy-vline 
WA_RNPLR_RELSE_STR-XATTRX sy-vline 
WA_RNPLR_RELSE_STR-XMUSTX sy-vline 
WA_RNPLR_RELSE_STR-XDONEX sy-vline 
WA_RNPLR_RELSE_STR-XDIRECTIONX sy-vline 
WA_RNPLR_RELSE_STR-XENQ_RX sy-vline 
WA_RNPLR_RELSE_STR-XENQ_PX sy-vline 
WA_RNPLR_RELSE_STR-XCHNGX sy-vline 
WA_RNPLR_RELSE_STR-XFMODX sy-vline 
WA_RNPLR_RELSE_STR-RELSHIP_CHINDX sy-vline 
WA_RNPLR_RELSE_STR-KIND_PROCX sy-vline 
WA_RNPLR_RELSE_STR-RANGE_PROCX sy-vline 
WA_RNPLR_RELSE_STR-DESC_PROCX sy-vline 
WA_RNPLR_RELSE_STR-DESC_PROC_LX sy-vline 
WA_RNPLR_RELSE_STR-ACTION_CODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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