ABAP Select data from SAP table RNPTL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPTL
*  INTO TABLE @DATA(IT_RNPTL2).
*--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_RNPTL INDEX 1 INTO DATA(WA_RNPTL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPTL>-NNAME = 1.
<RNPTL>-NNAMES = 1.
<RNPTL>-VNAME = 1.
<RNPTL>-VNAMES = 1.
<RNPTL>-GSCHL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPTL-GSCHLE, sy-vline,
  WA_RNPTL-ORGID, sy-vline,
  WA_RNPTL-ORGKB, sy-vline,
  WA_RNPTL-ANWES, sy-vline,
  WA_RNPTL-ENTLAS, sy-vline,
  WA_RNPTL-ALPHA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPTL 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_RNPTL 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_RNPTL INTO WA_RNPTL.


*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 ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPTL-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPTL-ORGID.
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_RNPTL_STR, 
NNAME TYPE STRING,
NNAMES TYPE STRING,
VNAME TYPE STRING,
VNAMES TYPE STRING,
GSCHL TYPE STRING,
GSCHLE TYPE STRING,
ORGID TYPE STRING,
ORGKB TYPE STRING,
ANWES TYPE STRING,
ENTLAS TYPE STRING,
ALPHA TYPE STRING,
ORGEIN TYPE STRING,
AMBUL TYPE STRING,
PFORT TYPE STRING,
TEILS TYPE STRING,
PLAN_ENTL TYPE STRING,
ABWES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPTL_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_RNPTL_STR-NNAME sy-vline 
WA_RNPTL_STR-NNAMES sy-vline 
WA_RNPTL_STR-VNAME sy-vline 
WA_RNPTL_STR-VNAMES sy-vline 
WA_RNPTL_STR-GSCHL sy-vline 
WA_RNPTL_STR-GSCHLE sy-vline 
WA_RNPTL_STR-ORGID sy-vline 
WA_RNPTL_STR-ORGKB sy-vline 
WA_RNPTL_STR-ANWES sy-vline 
WA_RNPTL_STR-ENTLAS sy-vline 
WA_RNPTL_STR-ALPHA sy-vline 
WA_RNPTL_STR-ORGEIN sy-vline 
WA_RNPTL_STR-AMBUL sy-vline 
WA_RNPTL_STR-PFORT sy-vline 
WA_RNPTL_STR-TEILS sy-vline 
WA_RNPTL_STR-PLAN_ENTL sy-vline 
WA_RNPTL_STR-ABWES sy-vline      INTO ld_text SEPARATED BY SPACE.

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