ABAP Select data from SAP table RN1N1ONP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1N1ONP 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 RN1N1ONP. 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 RN1N1ONP 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_RN1N1ONP TYPE STANDARD TABLE OF RN1N1ONP,
      WA_RN1N1ONP TYPE RN1N1ONP,
      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: <RN1N1ONP> TYPE RN1N1ONP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1N1ONP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1N1ONP
  INTO TABLE IT_RN1N1ONP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1N1ONP
*  INTO TABLE @DATA(IT_RN1N1ONP2).
*--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_RN1N1ONP INDEX 1 INTO DATA(WA_RN1N1ONP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1N1ONP ASSIGNING <RN1N1ONP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1N1ONP>-MANDT = 1.
<RN1N1ONP>-EINRI = 1.
<RN1N1ONP>-MARKFIELD = 1.
<RN1N1ONP>-ANKLEI = 1.
<RN1N1ONP>-PATNR = 1.

ENDLOOP.

LOOP AT IT_RN1N1ONP INTO WA_RN1N1ONP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1N1ONP-FALNR, sy-vline,
  WA_RN1N1ONP-LFDNR, sy-vline,
  WA_RN1N1ONP-PATNAME, sy-vline,
  WA_RN1N1ONP-RAUMKZ, sy-vline,
  WA_RN1N1ONP-RFG, sy-vline,
  WA_RN1N1ONP-DAUER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1N1ONP 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_RN1N1ONP 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_RN1N1ONP INTO WA_RN1N1ONP.


*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_RN1N1ONP-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANKLEI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-ANKLEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-ANKLEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RAUMKZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-RAUMKZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-RAUMKZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANPOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-ANPOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-ANPOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-ORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZIMMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-ZIMMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-ZIMMER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANF_VMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-ANF_VMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-ANF_VMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ERBOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-ERBOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-ERBOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANFOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-ANFOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-ANFOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AFNOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-AFNOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-AFNOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DIALO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ONP-DIALO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ONP-DIALO.
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_RN1N1ONP_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
MARKFIELD TYPE STRING,
ANKLEI TYPE STRING,
PATNR TYPE STRING,
FALNR TYPE STRING,
LFDNR TYPE STRING,
PATNAME TYPE STRING,
RAUMKZ TYPE STRING,
RFG TYPE STRING,
DAUER TYPE STRING,
PBZT TYPE STRING,
PZMAN TYPE STRING,
GSCHLE TYPE STRING,
GBDAT TYPE STRING,
PATALTER TYPE STRING,
ANPOE TYPE STRING,
ORGPF TYPE STRING,
ZIMMER TYPE STRING,
DIAGNOSE TYPE STRING,
PRIVKZ TYPE STRING,
RISKZ TYPE STRING,
APRIE TYPE STRING,
ANERF TYPE STRING,
PMEDFG TYPE STRING,
PMEDVS TYPE STRING,
PATEIN TYPE STRING,
ANF_VMA TYPE STRING,
STRING_LEI TYPE STRING,
LEI_BEZ TYPE STRING,
ERBOE TYPE STRING,
ANFOE TYPE STRING,
ERSTE_LEI TYPE STRING,
ZTMK_BEZ TYPE STRING,
ZTMK_ZEIT TYPE STRING,
IFGR TYPE STRING,
BEM_BEW TYPE STRING,
DOKKZ TYPE STRING,
TERMINF TYPE STRING,
INFO_EXIT TYPE STRING,
OPNR TYPE STRING,
STRING_VMA TYPE STRING,
ICON_DOC TYPE STRING,
AUFGABE_VMA TYPE STRING,
AFNOE TYPE STRING,
AFNDT TYPE STRING,
AFNZT TYPE STRING,
WDATUM TYPE STRING,
WZPIE TYPE STRING,
WZPITXT TYPE STRING,
N1PTINT TYPE STRING,
KONTEXT1 TYPE STRING,
KONTEXT2 TYPE STRING,
KONTEXT3 TYPE STRING,
CXSTA1 TYPE STRING,
CXSTA2 TYPE STRING,
CXSTA3 TYPE STRING,
CXSTA_ICON1 TYPE STRING,
CXSTA_ICON2 TYPE STRING,
CXSTA_ICON3 TYPE STRING,
DIALO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1N1ONP_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_RN1N1ONP_STR-MANDT sy-vline 
WA_RN1N1ONP_STR-EINRI sy-vline 
WA_RN1N1ONP_STR-MARKFIELD sy-vline 
WA_RN1N1ONP_STR-ANKLEI sy-vline 
WA_RN1N1ONP_STR-PATNR sy-vline 
WA_RN1N1ONP_STR-FALNR sy-vline 
WA_RN1N1ONP_STR-LFDNR sy-vline 
WA_RN1N1ONP_STR-PATNAME sy-vline 
WA_RN1N1ONP_STR-RAUMKZ sy-vline 
WA_RN1N1ONP_STR-RFG sy-vline 
WA_RN1N1ONP_STR-DAUER sy-vline 
WA_RN1N1ONP_STR-PBZT sy-vline 
WA_RN1N1ONP_STR-PZMAN sy-vline 
WA_RN1N1ONP_STR-GSCHLE sy-vline 
WA_RN1N1ONP_STR-GBDAT sy-vline 
WA_RN1N1ONP_STR-PATALTER sy-vline 
WA_RN1N1ONP_STR-ANPOE sy-vline 
WA_RN1N1ONP_STR-ORGPF sy-vline 
WA_RN1N1ONP_STR-ZIMMER sy-vline 
WA_RN1N1ONP_STR-DIAGNOSE sy-vline 
WA_RN1N1ONP_STR-PRIVKZ sy-vline 
WA_RN1N1ONP_STR-RISKZ sy-vline 
WA_RN1N1ONP_STR-APRIE sy-vline 
WA_RN1N1ONP_STR-ANERF sy-vline 
WA_RN1N1ONP_STR-PMEDFG sy-vline 
WA_RN1N1ONP_STR-PMEDVS sy-vline 
WA_RN1N1ONP_STR-PATEIN sy-vline 
WA_RN1N1ONP_STR-ANF_VMA sy-vline 
WA_RN1N1ONP_STR-STRING_LEI sy-vline 
WA_RN1N1ONP_STR-LEI_BEZ sy-vline 
WA_RN1N1ONP_STR-ERBOE sy-vline 
WA_RN1N1ONP_STR-ANFOE sy-vline 
WA_RN1N1ONP_STR-ERSTE_LEI sy-vline 
WA_RN1N1ONP_STR-ZTMK_BEZ sy-vline 
WA_RN1N1ONP_STR-ZTMK_ZEIT sy-vline 
WA_RN1N1ONP_STR-IFGR sy-vline 
WA_RN1N1ONP_STR-BEM_BEW sy-vline 
WA_RN1N1ONP_STR-DOKKZ sy-vline 
WA_RN1N1ONP_STR-TERMINF sy-vline 
WA_RN1N1ONP_STR-INFO_EXIT sy-vline 
WA_RN1N1ONP_STR-OPNR sy-vline 
WA_RN1N1ONP_STR-STRING_VMA sy-vline 
WA_RN1N1ONP_STR-ICON_DOC sy-vline 
WA_RN1N1ONP_STR-AUFGABE_VMA sy-vline 
WA_RN1N1ONP_STR-AFNOE sy-vline 
WA_RN1N1ONP_STR-AFNDT sy-vline 
WA_RN1N1ONP_STR-AFNZT sy-vline 
WA_RN1N1ONP_STR-WDATUM sy-vline 
WA_RN1N1ONP_STR-WZPIE sy-vline 
WA_RN1N1ONP_STR-WZPITXT sy-vline 
WA_RN1N1ONP_STR-N1PTINT sy-vline 
WA_RN1N1ONP_STR-KONTEXT1 sy-vline 
WA_RN1N1ONP_STR-KONTEXT2 sy-vline 
WA_RN1N1ONP_STR-KONTEXT3 sy-vline 
WA_RN1N1ONP_STR-CXSTA1 sy-vline 
WA_RN1N1ONP_STR-CXSTA2 sy-vline 
WA_RN1N1ONP_STR-CXSTA3 sy-vline 
WA_RN1N1ONP_STR-CXSTA_ICON1 sy-vline 
WA_RN1N1ONP_STR-CXSTA_ICON2 sy-vline 
WA_RN1N1ONP_STR-CXSTA_ICON3 sy-vline 
WA_RN1N1ONP_STR-DIALO sy-vline      INTO ld_text SEPARATED BY SPACE.

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