ABAP Select data from SAP table RNLOP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNLOP
*  INTO TABLE @DATA(IT_RNLOP2).
*--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_RNLOP INDEX 1 INTO DATA(WA_RNLOP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNLOP>-EINRI = 1.
<RNLOP>-FALNR = 1.
<RNLOP>-LEIST = 1.
<RNLOP>-LNRLS = 1.
<RNLOP>-ABRKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNLOP-ABRMA, sy-vline,
  WA_RNLOP-ANART, sy-vline,
  WA_RNLOP-ANFOE, sy-vline,
  WA_RNLOP-ANPOE, sy-vline,
  WA_RNLOP-ABTYP, sy-vline,
  WA_RNLOP-ANZOP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNLOP 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_RNLOP 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_RNLOP INTO WA_RNLOP.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field GPAR1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNLOP-GPAR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNLOP-GPAR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPAR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNLOP-GPAR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNLOP-GPAR2.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field LEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RNLOP-LEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNLOP-LEINH.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ROLT1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNLOP-ROLT1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNLOP-ROLT1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROLT2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNLOP-ROLT2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNLOP-ROLT2.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field WNDNRCH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNLOP-WNDNRCH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNLOP-WNDNRCH.
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_RNLOP_STR, 
EINRI TYPE STRING,
FALNR TYPE STRING,
LEIST TYPE STRING,
LNRLS TYPE STRING,
ABRKZ TYPE STRING,
ABRMA TYPE STRING,
ANART TYPE STRING,
ANFOE TYPE STRING,
ANPOE TYPE STRING,
ABTYP TYPE STRING,
ANZOP TYPE STRING,
BEGZT TYPE STRING,
ENDZT TYPE STRING,
ENTKY TYPE STRING,
ENZKY TYPE STRING,
ENTG2 TYPE STRING,
ERBOE TYPE STRING,
ERBTY TYPE STRING,
EXCAT TYPE STRING,
GPAR1 TYPE STRING,
GPAR2 TYPE STRING,
HCOKZ TYPE STRING,
HAUST TYPE STRING,
ICPMK TYPE STRING,
ICPML TYPE STRING,
ICPHC TYPE STRING,
LFDNR TYPE STRING,
ICDKT TYPE STRING,
ICDKY TYPE STRING,
ICPLT TYPE STRING,
IDENT TYPE STRING,
DTEX1 TYPE STRING,
KTRKZ TYPE STRING,
LEINH TYPE STRING,
LEITX TYPE STRING,
LEVON TYPE STRING,
LEBIS TYPE STRING,
LSLOK TYPE STRING,
MANDT TYPE STRING,
MARK TYPE STRING,
MENGE TYPE STRING,
PNAM1 TYPE STRING,
PNAM2 TYPE STRING,
PZAHL TYPE STRING,
REFKY TYPE STRING,
REMRK TYPE STRING,
ROLT1 TYPE STRING,
ROLT2 TYPE STRING,
ROLB1 TYPE STRING,
ROLB2 TYPE STRING,
STALS TYPE STRING,
STORN TYPE STRING,
TARAS TYPE STRING,
TARIF TYPE STRING,
TARLS TYPE STRING,
TARSP TYPE STRING,
TBTRAG TYPE STRING,
WNDNRCH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNLOP_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_RNLOP_STR-EINRI sy-vline 
WA_RNLOP_STR-FALNR sy-vline 
WA_RNLOP_STR-LEIST sy-vline 
WA_RNLOP_STR-LNRLS sy-vline 
WA_RNLOP_STR-ABRKZ sy-vline 
WA_RNLOP_STR-ABRMA sy-vline 
WA_RNLOP_STR-ANART sy-vline 
WA_RNLOP_STR-ANFOE sy-vline 
WA_RNLOP_STR-ANPOE sy-vline 
WA_RNLOP_STR-ABTYP sy-vline 
WA_RNLOP_STR-ANZOP sy-vline 
WA_RNLOP_STR-BEGZT sy-vline 
WA_RNLOP_STR-ENDZT sy-vline 
WA_RNLOP_STR-ENTKY sy-vline 
WA_RNLOP_STR-ENZKY sy-vline 
WA_RNLOP_STR-ENTG2 sy-vline 
WA_RNLOP_STR-ERBOE sy-vline 
WA_RNLOP_STR-ERBTY sy-vline 
WA_RNLOP_STR-EXCAT sy-vline 
WA_RNLOP_STR-GPAR1 sy-vline 
WA_RNLOP_STR-GPAR2 sy-vline 
WA_RNLOP_STR-HCOKZ sy-vline 
WA_RNLOP_STR-HAUST sy-vline 
WA_RNLOP_STR-ICPMK sy-vline 
WA_RNLOP_STR-ICPML sy-vline 
WA_RNLOP_STR-ICPHC sy-vline 
WA_RNLOP_STR-LFDNR sy-vline 
WA_RNLOP_STR-ICDKT sy-vline 
WA_RNLOP_STR-ICDKY sy-vline 
WA_RNLOP_STR-ICPLT sy-vline 
WA_RNLOP_STR-IDENT sy-vline 
WA_RNLOP_STR-DTEX1 sy-vline 
WA_RNLOP_STR-KTRKZ sy-vline 
WA_RNLOP_STR-LEINH sy-vline 
WA_RNLOP_STR-LEITX sy-vline 
WA_RNLOP_STR-LEVON sy-vline 
WA_RNLOP_STR-LEBIS sy-vline 
WA_RNLOP_STR-LSLOK sy-vline 
WA_RNLOP_STR-MANDT sy-vline 
WA_RNLOP_STR-MARK sy-vline 
WA_RNLOP_STR-MENGE sy-vline 
WA_RNLOP_STR-PNAM1 sy-vline 
WA_RNLOP_STR-PNAM2 sy-vline 
WA_RNLOP_STR-PZAHL sy-vline 
WA_RNLOP_STR-REFKY sy-vline 
WA_RNLOP_STR-REMRK sy-vline 
WA_RNLOP_STR-ROLT1 sy-vline 
WA_RNLOP_STR-ROLT2 sy-vline 
WA_RNLOP_STR-ROLB1 sy-vline 
WA_RNLOP_STR-ROLB2 sy-vline 
WA_RNLOP_STR-STALS sy-vline 
WA_RNLOP_STR-STORN sy-vline 
WA_RNLOP_STR-TARAS sy-vline 
WA_RNLOP_STR-TARIF sy-vline 
WA_RNLOP_STR-TARLS sy-vline 
WA_RNLOP_STR-TARSP sy-vline 
WA_RNLOP_STR-TBTRAG sy-vline 
WA_RNLOP_STR-WNDNRCH sy-vline      INTO ld_text SEPARATED BY SPACE.

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