ABAP Select data from SAP table RNPP5 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNPP5 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 RNPP5. 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 RNPP5 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_RNPP5 TYPE STANDARD TABLE OF RNPP5,
      WA_RNPP5 TYPE RNPP5,
      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: <RNPP5> TYPE RNPP5.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNPP5.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNPP5
  INTO TABLE IT_RNPP5.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPP5
*  INTO TABLE @DATA(IT_RNPP52).
*--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_RNPP5 INDEX 1 INTO DATA(WA_RNPP52).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNPP5 ASSIGNING <RNPP5>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPP5>-EINRI = 1.
<RNPP5>-FALNR = 1.
<RNPP5>-LFDNR = 1.
<RNPP5>-KOSTR = 1.
<RNPP5>-LNRLS = 1.

ENDLOOP.

LOOP AT IT_RNPP5 INTO WA_RNPP5.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPP5-SPLIT, sy-vline,
  WA_RNPP5-ABTAR, sy-vline,
  WA_RNPP5-ABLST, sy-vline,
  WA_RNPP5-LFDBEW, sy-vline,
  WA_RNPP5-ZEITR, sy-vline,
  WA_RNPP5-DAYNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPP5 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_RNPP5 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_RNPP5 INTO WA_RNPP5.


*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_RNPP5-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPP5-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPP5-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPP5-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPP5-KOSTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPP5-KOSTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRLS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPP5-LNRLS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPP5-LNRLS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPP5-ABTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPP5-ABTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABLST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNPP5-ABLST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPP5-ABLST.
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_RNPP5_STR, 
EINRI TYPE STRING,
FALNR TYPE STRING,
LFDNR TYPE STRING,
KOSTR TYPE STRING,
LNRLS TYPE STRING,
SPLIT TYPE STRING,
ABTAR TYPE STRING,
ABLST TYPE STRING,
LFDBEW TYPE STRING,
ZEITR TYPE STRING,
DAYNO TYPE STRING,
MENGE TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
BWART TYPE STRING,
EXCAT TYPE STRING,
WAERS TYPE STRING,
NETWR TYPE STRING,
BRUWR TYPE STRING,
OPENA TYPE STRING,
COVER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPP5_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_RNPP5_STR-EINRI sy-vline 
WA_RNPP5_STR-FALNR sy-vline 
WA_RNPP5_STR-LFDNR sy-vline 
WA_RNPP5_STR-KOSTR sy-vline 
WA_RNPP5_STR-LNRLS sy-vline 
WA_RNPP5_STR-SPLIT sy-vline 
WA_RNPP5_STR-ABTAR sy-vline 
WA_RNPP5_STR-ABLST sy-vline 
WA_RNPP5_STR-LFDBEW sy-vline 
WA_RNPP5_STR-ZEITR sy-vline 
WA_RNPP5_STR-DAYNO sy-vline 
WA_RNPP5_STR-MENGE sy-vline 
WA_RNPP5_STR-BEGDT sy-vline 
WA_RNPP5_STR-ENDDT sy-vline 
WA_RNPP5_STR-BWART sy-vline 
WA_RNPP5_STR-EXCAT sy-vline 
WA_RNPP5_STR-WAERS sy-vline 
WA_RNPP5_STR-NETWR sy-vline 
WA_RNPP5_STR-BRUWR sy-vline 
WA_RNPP5_STR-OPENA sy-vline 
WA_RNPP5_STR-COVER sy-vline      INTO ld_text SEPARATED BY SPACE.

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