ABAP Select data from SAP table RN1N1ON 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 RN1N1ON 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 RN1N1ON. 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 RN1N1ON 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_RN1N1ON TYPE STANDARD TABLE OF RN1N1ON,
      WA_RN1N1ON TYPE RN1N1ON,
      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: <RN1N1ON> TYPE RN1N1ON.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1N1ON.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1N1ON
  INTO TABLE IT_RN1N1ON.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1N1ON
*  INTO TABLE @DATA(IT_RN1N1ON2).
*--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_RN1N1ON INDEX 1 INTO DATA(WA_RN1N1ON2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1N1ON ASSIGNING <RN1N1ON>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1N1ON>-MANDT = 1.
<RN1N1ON>-EINRI = 1.
<RN1N1ON>-MARKFIELD = 1.
<RN1N1ON>-ANKLEI = 1.
<RN1N1ON>-PATNR = 1.

ENDLOOP.

LOOP AT IT_RN1N1ON INTO WA_RN1N1ON.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1N1ON-FALNR, sy-vline,
  WA_RN1N1ON-LFDNR, sy-vline,
  WA_RN1N1ON-PATNAME, sy-vline,
  WA_RN1N1ON-RAUMKZ, sy-vline,
  WA_RN1N1ON-RFG, sy-vline,
  WA_RN1N1ON-DAUER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1N1ON 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_RN1N1ON 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_RN1N1ON INTO WA_RN1N1ON.


*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_RN1N1ON-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANKLEI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-ANKLEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-ANKLEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RAUMKZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-RAUMKZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-RAUMKZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ERBOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-ERBOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-ERBOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANPOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-ANPOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-ANPOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-ORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZIMMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-ZIMMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-ZIMMER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANF_VMA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-ANF_VMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-ANF_VMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AFNOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-AFNOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-AFNOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DIALO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1N1ON-DIALO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1N1ON-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_RN1N1ON_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,
ERBOE 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,
WZEIT TYPE STRING,
ANF_VMA TYPE STRING,
STRING_LEI TYPE STRING,
LEI_BEZ TYPE STRING,
INFO_EXIT TYPE STRING,
OPNR TYPE STRING,
STRING_VMA 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_RN1N1ON_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_RN1N1ON_STR-MANDT sy-vline 
WA_RN1N1ON_STR-EINRI sy-vline 
WA_RN1N1ON_STR-MARKFIELD sy-vline 
WA_RN1N1ON_STR-ANKLEI sy-vline 
WA_RN1N1ON_STR-PATNR sy-vline 
WA_RN1N1ON_STR-FALNR sy-vline 
WA_RN1N1ON_STR-LFDNR sy-vline 
WA_RN1N1ON_STR-PATNAME sy-vline 
WA_RN1N1ON_STR-RAUMKZ sy-vline 
WA_RN1N1ON_STR-RFG sy-vline 
WA_RN1N1ON_STR-DAUER sy-vline 
WA_RN1N1ON_STR-PBZT sy-vline 
WA_RN1N1ON_STR-PZMAN sy-vline 
WA_RN1N1ON_STR-GSCHLE sy-vline 
WA_RN1N1ON_STR-GBDAT sy-vline 
WA_RN1N1ON_STR-PATALTER sy-vline 
WA_RN1N1ON_STR-ERBOE sy-vline 
WA_RN1N1ON_STR-ANPOE sy-vline 
WA_RN1N1ON_STR-ORGPF sy-vline 
WA_RN1N1ON_STR-ZIMMER sy-vline 
WA_RN1N1ON_STR-DIAGNOSE sy-vline 
WA_RN1N1ON_STR-PRIVKZ sy-vline 
WA_RN1N1ON_STR-RISKZ sy-vline 
WA_RN1N1ON_STR-APRIE sy-vline 
WA_RN1N1ON_STR-ANERF sy-vline 
WA_RN1N1ON_STR-PMEDFG sy-vline 
WA_RN1N1ON_STR-PMEDVS sy-vline 
WA_RN1N1ON_STR-PATEIN sy-vline 
WA_RN1N1ON_STR-WZEIT sy-vline 
WA_RN1N1ON_STR-ANF_VMA sy-vline 
WA_RN1N1ON_STR-STRING_LEI sy-vline 
WA_RN1N1ON_STR-LEI_BEZ sy-vline 
WA_RN1N1ON_STR-INFO_EXIT sy-vline 
WA_RN1N1ON_STR-OPNR sy-vline 
WA_RN1N1ON_STR-STRING_VMA sy-vline 
WA_RN1N1ON_STR-AUFGABE_VMA sy-vline 
WA_RN1N1ON_STR-AFNOE sy-vline 
WA_RN1N1ON_STR-AFNDT sy-vline 
WA_RN1N1ON_STR-AFNZT sy-vline 
WA_RN1N1ON_STR-WDATUM sy-vline 
WA_RN1N1ON_STR-WZPIE sy-vline 
WA_RN1N1ON_STR-WZPITXT sy-vline 
WA_RN1N1ON_STR-N1PTINT sy-vline 
WA_RN1N1ON_STR-KONTEXT1 sy-vline 
WA_RN1N1ON_STR-KONTEXT2 sy-vline 
WA_RN1N1ON_STR-KONTEXT3 sy-vline 
WA_RN1N1ON_STR-CXSTA1 sy-vline 
WA_RN1N1ON_STR-CXSTA2 sy-vline 
WA_RN1N1ON_STR-CXSTA3 sy-vline 
WA_RN1N1ON_STR-CXSTA_ICON1 sy-vline 
WA_RN1N1ON_STR-CXSTA_ICON2 sy-vline 
WA_RN1N1ON_STR-CXSTA_ICON3 sy-vline 
WA_RN1N1ON_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.