ABAP Select data from SAP table RNLVERP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNLVERP
*  INTO TABLE @DATA(IT_RNLVERP2).
*--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_RNLVERP INDEX 1 INTO DATA(WA_RNLVERP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNLVERP>-MANDT = 1.
<RNLVERP>-EINRI = 1.
<RNLVERP>-FACNUM = 1.
<RNLVERP>-VBELN = 1.
<RNLVERP>-POSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNLVERP-RECID, sy-vline,
  WA_RNLVERP-PRSCOD, sy-vline,
  WA_RNLVERP-LEIST, sy-vline,
  WA_RNLVERP-LNRLS, sy-vline,
  WA_RNLVERP-VLGNUM, sy-vline,
  WA_RNLVERP-NETWR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNLVERP 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_RNLVERP 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_RNLVERP INTO WA_RNLVERP.


*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_RNLVERP-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNLVERP-EINRI.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNLVERP-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNLVERP-KUNRG.
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_RNLVERP_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
FACNUM TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
RECID TYPE STRING,
PRSCOD TYPE STRING,
LEIST TYPE STRING,
LNRLS TYPE STRING,
VLGNUM TYPE STRING,
NETWR TYPE STRING,
BET_BEDR TYPE STRING,
STATUS TYPE STRING,
FOUTCD TYPE STRING,
PSTAT TYPE STRING,
REMARK TYPE STRING,
RECDET_LNGTH TYPE STRING,
RECDET TYPE STRING,
KUNRG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNLVERP_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_RNLVERP_STR-MANDT sy-vline 
WA_RNLVERP_STR-EINRI sy-vline 
WA_RNLVERP_STR-FACNUM sy-vline 
WA_RNLVERP_STR-VBELN sy-vline 
WA_RNLVERP_STR-POSNR sy-vline 
WA_RNLVERP_STR-RECID sy-vline 
WA_RNLVERP_STR-PRSCOD sy-vline 
WA_RNLVERP_STR-LEIST sy-vline 
WA_RNLVERP_STR-LNRLS sy-vline 
WA_RNLVERP_STR-VLGNUM sy-vline 
WA_RNLVERP_STR-NETWR sy-vline 
WA_RNLVERP_STR-BET_BEDR sy-vline 
WA_RNLVERP_STR-STATUS sy-vline 
WA_RNLVERP_STR-FOUTCD sy-vline 
WA_RNLVERP_STR-PSTAT sy-vline 
WA_RNLVERP_STR-REMARK sy-vline 
WA_RNLVERP_STR-RECDET_LNGTH sy-vline 
WA_RNLVERP_STR-RECDET sy-vline 
WA_RNLVERP_STR-KUNRG sy-vline      INTO ld_text SEPARATED BY SPACE.

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