ABAP Select data from SAP table RNPAP into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNPAP 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 RNPAP. 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 RNPAP 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_RNPAP TYPE STANDARD TABLE OF RNPAP,
      WA_RNPAP TYPE RNPAP,
      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: <RNPAP> TYPE RNPAP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNPAP
*  INTO TABLE @DATA(IT_RNPAP2).
*--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_RNPAP INDEX 1 INTO DATA(WA_RNPAP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNPAP>-MANDT = 1.
<RNPAP>-PAPID = 1.
<RNPAP>-NNAME = 1.
<RNPAP>-VNAME = 1.
<RNPAP>-GBNAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNPAP-GBDAT, sy-vline,
  WA_RNPAP-GSCHLE, sy-vline,
  WA_RNPAP-TITEL, sy-vline,
  WA_RNPAP-NAMZU, sy-vline,
  WA_RNPAP-VORSW, sy-vline,
  WA_RNPAP-ANRDE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNPAP 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_RNPAP 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_RNPAP INTO WA_RNPAP.


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

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

*Conversion exit NLJUS, internal->external for field PASSNR
CALL FUNCTION 'CONVERSION_EXIT_NLJUS_OUTPUT'
  EXPORTING
    input =                      WA_RNPAP-PASSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPAP-PASSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_RNPAP-EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNPAP-EMAIL.
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_RNPAP_STR, 
MANDT TYPE STRING,
PAPID TYPE STRING,
NNAME TYPE STRING,
VNAME TYPE STRING,
GBNAM TYPE STRING,
GBDAT TYPE STRING,
GSCHLE TYPE STRING,
TITEL TYPE STRING,
NAMZU TYPE STRING,
VORSW TYPE STRING,
ANRDE TYPE STRING,
EXTNR TYPE STRING,
RVNUM TYPE STRING,
PASSTY TYPE STRING,
PASSNR TYPE STRING,
PSTLZ TYPE STRING,
LAND TYPE STRING,
REGIO TYPE STRING,
ORT TYPE STRING,
ORT2 TYPE STRING,
STRAS TYPE STRING,
STRAZ TYPE STRING,
EINZG TYPE STRING,
PSTLP TYPE STRING,
PFACH TYPE STRING,
LANPF TYPE STRING,
ORTPF TYPE STRING,
PSTLF TYPE STRING,
TELNO TYPE STRING,
FAXNR TYPE STRING,
FAXXT TYPE STRING,
TEXNR TYPE STRING,
BUILD TYPE STRING,
FLOOR TYPE STRING,
ROOM TYPE STRING,
EMAIL TYPE STRING,
HSNM1 TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
UNKNOWN_GBDAT TYPE STRING,
/ISHFR/BIRTHRK TYPE STRING,
PNAME TYPE STRING,
GSCHLE_TXT TYPE STRING,
ANRDE_TXT TYPE STRING,
PASSTY_TXT TYPE STRING,
LAND_TXT TYPE STRING,
REGIO_TXT TYPE STRING,
EINZG_TXT TYPE STRING,
LANPF_TXT TYPE STRING,
ADDR_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNPAP_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_RNPAP_STR-MANDT sy-vline 
WA_RNPAP_STR-PAPID sy-vline 
WA_RNPAP_STR-NNAME sy-vline 
WA_RNPAP_STR-VNAME sy-vline 
WA_RNPAP_STR-GBNAM sy-vline 
WA_RNPAP_STR-GBDAT sy-vline 
WA_RNPAP_STR-GSCHLE sy-vline 
WA_RNPAP_STR-TITEL sy-vline 
WA_RNPAP_STR-NAMZU sy-vline 
WA_RNPAP_STR-VORSW sy-vline 
WA_RNPAP_STR-ANRDE sy-vline 
WA_RNPAP_STR-EXTNR sy-vline 
WA_RNPAP_STR-RVNUM sy-vline 
WA_RNPAP_STR-PASSTY sy-vline 
WA_RNPAP_STR-PASSNR sy-vline 
WA_RNPAP_STR-PSTLZ sy-vline 
WA_RNPAP_STR-LAND sy-vline 
WA_RNPAP_STR-REGIO sy-vline 
WA_RNPAP_STR-ORT sy-vline 
WA_RNPAP_STR-ORT2 sy-vline 
WA_RNPAP_STR-STRAS sy-vline 
WA_RNPAP_STR-STRAZ sy-vline 
WA_RNPAP_STR-EINZG sy-vline 
WA_RNPAP_STR-PSTLP sy-vline 
WA_RNPAP_STR-PFACH sy-vline 
WA_RNPAP_STR-LANPF sy-vline 
WA_RNPAP_STR-ORTPF sy-vline 
WA_RNPAP_STR-PSTLF sy-vline 
WA_RNPAP_STR-TELNO sy-vline 
WA_RNPAP_STR-FAXNR sy-vline 
WA_RNPAP_STR-FAXXT sy-vline 
WA_RNPAP_STR-TEXNR sy-vline 
WA_RNPAP_STR-BUILD sy-vline 
WA_RNPAP_STR-FLOOR sy-vline 
WA_RNPAP_STR-ROOM sy-vline 
WA_RNPAP_STR-EMAIL sy-vline 
WA_RNPAP_STR-HSNM1 sy-vline 
WA_RNPAP_STR-ERDAT sy-vline 
WA_RNPAP_STR-ERUSR sy-vline 
WA_RNPAP_STR-UPDAT sy-vline 
WA_RNPAP_STR-UPUSR sy-vline 
WA_RNPAP_STR-STORN sy-vline 
WA_RNPAP_STR-STUSR sy-vline 
WA_RNPAP_STR-STDAT sy-vline 
WA_RNPAP_STR-UNKNOWN_GBDAT sy-vline 
WA_RNPAP_STR-/ISHFR/BIRTHRK sy-vline 
WA_RNPAP_STR-PNAME sy-vline 
WA_RNPAP_STR-GSCHLE_TXT sy-vline 
WA_RNPAP_STR-ANRDE_TXT sy-vline 
WA_RNPAP_STR-PASSTY_TXT sy-vline 
WA_RNPAP_STR-LAND_TXT sy-vline 
WA_RNPAP_STR-REGIO_TXT sy-vline 
WA_RNPAP_STR-EINZG_TXT sy-vline 
WA_RNPAP_STR-LANPF_TXT sy-vline 
WA_RNPAP_STR-ADDR_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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