ABAP Select data from SAP table RN1L2 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 RN1L2 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 RN1L2. 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 RN1L2 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_RN1L2 TYPE STANDARD TABLE OF RN1L2,
      WA_RN1L2 TYPE RN1L2,
      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: <RN1L2> TYPE RN1L2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1L2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1L2
  INTO TABLE IT_RN1L2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1L2
*  INTO TABLE @DATA(IT_RN1L22).
*--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_RN1L2 INDEX 1 INTO DATA(WA_RN1L22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1L2 ASSIGNING <RN1L2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1L2>-MANDT = 1.
<RN1L2>-EINRI = 1.
<RN1L2>-TARIF = 1.
<RN1L2>-TALST = 1.
<RN1L2>-ENDDT = 1.

ENDLOOP.

LOOP AT IT_RN1L2 INTO WA_RN1L2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1L2-BEGDT, sy-vline,
  WA_RN1L2-EXTNR, sy-vline,
  WA_RN1L2-TGRKZ, sy-vline,
  WA_RN1L2-TAGRU, sy-vline,
  WA_RN1L2-BFORM, sy-vline,
  WA_RN1L2-ABRKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1L2 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_RN1L2 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_RN1L2 INTO WA_RN1L2.


*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_RN1L2-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TARIF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-TARIF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-TARIF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TALST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-TALST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-TALST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TAGRU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-TAGRU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-TAGRU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BFORM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-BFORM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-BFORM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-LEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-LEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field VMATR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-VMATR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-VMATR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTGA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-ENTGA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-ENTGA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FPTYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-FPTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-FPTYP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TAKAT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-TAKAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-TAKAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TAGR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-TAGR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-TAGR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EZV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-EZV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-EZV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field USERUNIT1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-USERUNIT1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-USERUNIT1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-ORGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NTPZ_UETAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-NTPZ_UETAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-NTPZ_UETAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NTPZ_UELST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-NTPZ_UELST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-NTPZ_UELST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field N1MEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-N1MEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-N1MEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRLS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1L2-LNRLS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1L2-LNRLS.
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_RN1L2_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
TARIF TYPE STRING,
TALST TYPE STRING,
ENDDT TYPE STRING,
BEGDT TYPE STRING,
EXTNR TYPE STRING,
TGRKZ TYPE STRING,
TAGRU TYPE STRING,
BFORM TYPE STRING,
ABRKZ TYPE STRING,
ABGKZ TYPE STRING,
ZUZKZ TYPE STRING,
LEINH TYPE STRING,
VLEIA TYPE STRING,
VMATR TYPE STRING,
ABTXT TYPE STRING,
ZEITR TYPE STRING,
TAXKL TYPE STRING,
MECHA TYPE STRING,
ABREL TYPE STRING,
LOEKZ TYPE STRING,
LOUSR TYPE STRING,
LODAT TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
N1ADMLEI TYPE STRING,
N1ANFOR TYPE STRING,
N1DAUER TYPE STRING,
N1ERBRI TYPE STRING,
N1EXTER TYPE STRING,
N1MEDLEI TYPE STRING,
N1PFLLEI TYPE STRING,
GRVER TYPE STRING,
ENTGA TYPE STRING,
MWSTU TYPE STRING,
HCOKZ TYPE STRING,
OTYPL TYPE STRING,
ABRAM TYPE STRING,
ENTKY TYPE STRING,
ENZKY TYPE STRING,
ENTG2 TYPE STRING,
KTRKZ TYPE STRING,
ABWRL TYPE STRING,
GSCHL TYPE STRING,
AGELO TYPE STRING,
AGEHI TYPE STRING,
GVDIN TYPE STRING,
FPTYP TYPE STRING,
NOERF TYPE STRING,
EXPGR TYPE STRING,
OPTAB TYPE STRING,
PRICHG TYPE STRING,
PRADM TYPE STRING,
EXCAT TYPE STRING,
TAKAT TYPE STRING,
LDRCD TYPE STRING,
TARTYP TYPE STRING,
TAGR2 TYPE STRING,
OPSAAL TYPE STRING,
OPEBKZ TYPE STRING,
OPSPPS TYPE STRING,
HONREL TYPE STRING,
HONART TYPE STRING,
HONUGR TYPE STRING,
DKAT TYPE STRING,
DKEY TYPE STRING,
PICTURE TYPE STRING,
PRFVI TYPE STRING,
DRG_PARTITION TYPE STRING,
OPLOC TYPE STRING,
CHGUNIT TYPE STRING,
EZV TYPE STRING,
USERSIGN1 TYPE STRING,
USERSIGN2 TYPE STRING,
USERAMOUNT1 TYPE STRING,
USERUNIT1 TYPE STRING,
USERDATE1 TYPE STRING,
USERDATE2 TYPE STRING,
USER0 TYPE STRING,
USER1 TYPE STRING,
USER2 TYPE STRING,
USER3 TYPE STRING,
USER4 TYPE STRING,
ABRBLOC TYPE STRING,
DURSRVBAS TYPE STRING,
ENTGAMB TYPE STRING,
TUAEND TYPE STRING,
LAAMB TYPE STRING,
LSCHL TYPE STRING,
OPLEBSPEN TYPE STRING,
KTXT1 TYPE STRING,
STUFE TYPE STRING,
KNOTENKZ TYPE STRING,
ORGID TYPE STRING,
ANFTY TYPE STRING,
NTPZ_BEGDT TYPE STRING,
NTPZ_ENDDT TYPE STRING,
NTPZ_UETAR TYPE STRING,
NTPZ_UELST TYPE STRING,
NTPZ_LOEKZ TYPE STRING,
N1MNG TYPE STRING,
N1MEH TYPE STRING,
LNRLS TYPE STRING,
RN1LS_PRTID TYPE STRING,
AUSPR TYPE STRING,
ADD_SERVICE TYPE STRING,
CORDTYPID TYPE STRING,
SEQNUM TYPE STRING,
CORDPTYPID TYPE STRING,
CORDTPLID TYPE STRING,
CORDTPLNAME TYPE STRING,
NOCORDPTYP TYPE STRING,
IMENG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1L2_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_RN1L2_STR-MANDT sy-vline 
WA_RN1L2_STR-EINRI sy-vline 
WA_RN1L2_STR-TARIF sy-vline 
WA_RN1L2_STR-TALST sy-vline 
WA_RN1L2_STR-ENDDT sy-vline 
WA_RN1L2_STR-BEGDT sy-vline 
WA_RN1L2_STR-EXTNR sy-vline 
WA_RN1L2_STR-TGRKZ sy-vline 
WA_RN1L2_STR-TAGRU sy-vline 
WA_RN1L2_STR-BFORM sy-vline 
WA_RN1L2_STR-ABRKZ sy-vline 
WA_RN1L2_STR-ABGKZ sy-vline 
WA_RN1L2_STR-ZUZKZ sy-vline 
WA_RN1L2_STR-LEINH sy-vline 
WA_RN1L2_STR-VLEIA sy-vline 
WA_RN1L2_STR-VMATR sy-vline 
WA_RN1L2_STR-ABTXT sy-vline 
WA_RN1L2_STR-ZEITR sy-vline 
WA_RN1L2_STR-TAXKL sy-vline 
WA_RN1L2_STR-MECHA sy-vline 
WA_RN1L2_STR-ABREL sy-vline 
WA_RN1L2_STR-LOEKZ sy-vline 
WA_RN1L2_STR-LOUSR sy-vline 
WA_RN1L2_STR-LODAT sy-vline 
WA_RN1L2_STR-ERDAT sy-vline 
WA_RN1L2_STR-ERUSR sy-vline 
WA_RN1L2_STR-UPDAT sy-vline 
WA_RN1L2_STR-UPUSR sy-vline 
WA_RN1L2_STR-N1ADMLEI sy-vline 
WA_RN1L2_STR-N1ANFOR sy-vline 
WA_RN1L2_STR-N1DAUER sy-vline 
WA_RN1L2_STR-N1ERBRI sy-vline 
WA_RN1L2_STR-N1EXTER sy-vline 
WA_RN1L2_STR-N1MEDLEI sy-vline 
WA_RN1L2_STR-N1PFLLEI sy-vline 
WA_RN1L2_STR-GRVER sy-vline 
WA_RN1L2_STR-ENTGA sy-vline 
WA_RN1L2_STR-MWSTU sy-vline 
WA_RN1L2_STR-HCOKZ sy-vline 
WA_RN1L2_STR-OTYPL sy-vline 
WA_RN1L2_STR-ABRAM sy-vline 
WA_RN1L2_STR-ENTKY sy-vline 
WA_RN1L2_STR-ENZKY sy-vline 
WA_RN1L2_STR-ENTG2 sy-vline 
WA_RN1L2_STR-KTRKZ sy-vline 
WA_RN1L2_STR-ABWRL sy-vline 
WA_RN1L2_STR-GSCHL sy-vline 
WA_RN1L2_STR-AGELO sy-vline 
WA_RN1L2_STR-AGEHI sy-vline 
WA_RN1L2_STR-GVDIN sy-vline 
WA_RN1L2_STR-FPTYP sy-vline 
WA_RN1L2_STR-NOERF sy-vline 
WA_RN1L2_STR-EXPGR sy-vline 
WA_RN1L2_STR-OPTAB sy-vline 
WA_RN1L2_STR-PRICHG sy-vline 
WA_RN1L2_STR-PRADM sy-vline 
WA_RN1L2_STR-EXCAT sy-vline 
WA_RN1L2_STR-TAKAT sy-vline 
WA_RN1L2_STR-LDRCD sy-vline 
WA_RN1L2_STR-TARTYP sy-vline 
WA_RN1L2_STR-TAGR2 sy-vline 
WA_RN1L2_STR-OPSAAL sy-vline 
WA_RN1L2_STR-OPEBKZ sy-vline 
WA_RN1L2_STR-OPSPPS sy-vline 
WA_RN1L2_STR-HONREL sy-vline 
WA_RN1L2_STR-HONART sy-vline 
WA_RN1L2_STR-HONUGR sy-vline 
WA_RN1L2_STR-DKAT sy-vline 
WA_RN1L2_STR-DKEY sy-vline 
WA_RN1L2_STR-PICTURE sy-vline 
WA_RN1L2_STR-PRFVI sy-vline 
WA_RN1L2_STR-DRG_PARTITION sy-vline 
WA_RN1L2_STR-OPLOC sy-vline 
WA_RN1L2_STR-CHGUNIT sy-vline 
WA_RN1L2_STR-EZV sy-vline 
WA_RN1L2_STR-USERSIGN1 sy-vline 
WA_RN1L2_STR-USERSIGN2 sy-vline 
WA_RN1L2_STR-USERAMOUNT1 sy-vline 
WA_RN1L2_STR-USERUNIT1 sy-vline 
WA_RN1L2_STR-USERDATE1 sy-vline 
WA_RN1L2_STR-USERDATE2 sy-vline 
WA_RN1L2_STR-USER0 sy-vline 
WA_RN1L2_STR-USER1 sy-vline 
WA_RN1L2_STR-USER2 sy-vline 
WA_RN1L2_STR-USER3 sy-vline 
WA_RN1L2_STR-USER4 sy-vline 
WA_RN1L2_STR-ABRBLOC sy-vline 
WA_RN1L2_STR-DURSRVBAS sy-vline 
WA_RN1L2_STR-ENTGAMB sy-vline 
WA_RN1L2_STR-TUAEND sy-vline 
WA_RN1L2_STR-LAAMB sy-vline 
WA_RN1L2_STR-LSCHL sy-vline 
WA_RN1L2_STR-OPLEBSPEN sy-vline 
WA_RN1L2_STR-KTXT1 sy-vline 
WA_RN1L2_STR-STUFE sy-vline 
WA_RN1L2_STR-KNOTENKZ sy-vline 
WA_RN1L2_STR-ORGID sy-vline 
WA_RN1L2_STR-ANFTY sy-vline 
WA_RN1L2_STR-NTPZ_BEGDT sy-vline 
WA_RN1L2_STR-NTPZ_ENDDT sy-vline 
WA_RN1L2_STR-NTPZ_UETAR sy-vline 
WA_RN1L2_STR-NTPZ_UELST sy-vline 
WA_RN1L2_STR-NTPZ_LOEKZ sy-vline 
WA_RN1L2_STR-N1MNG sy-vline 
WA_RN1L2_STR-N1MEH sy-vline 
WA_RN1L2_STR-LNRLS sy-vline 
WA_RN1L2_STR-RN1LS_PRTID sy-vline 
WA_RN1L2_STR-AUSPR sy-vline 
WA_RN1L2_STR-ADD_SERVICE sy-vline 
WA_RN1L2_STR-CORDTYPID sy-vline 
WA_RN1L2_STR-SEQNUM sy-vline 
WA_RN1L2_STR-CORDPTYPID sy-vline 
WA_RN1L2_STR-CORDTPLID sy-vline 
WA_RN1L2_STR-CORDTPLNAME sy-vline 
WA_RN1L2_STR-NOCORDPTYP sy-vline 
WA_RN1L2_STR-IMENG sy-vline      INTO ld_text SEPARATED BY SPACE.

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