ABAP Select data from SAP table RN1ANF_DAT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1ANF_DAT 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 RN1ANF_DAT. 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 RN1ANF_DAT 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_RN1ANF_DAT TYPE STANDARD TABLE OF RN1ANF_DAT,
      WA_RN1ANF_DAT TYPE RN1ANF_DAT,
      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: <RN1ANF_DAT> TYPE RN1ANF_DAT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1ANF_DAT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1ANF_DAT
  INTO TABLE IT_RN1ANF_DAT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1ANF_DAT
*  INTO TABLE @DATA(IT_RN1ANF_DAT2).
*--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_RN1ANF_DAT INDEX 1 INTO DATA(WA_RN1ANF_DAT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1ANF_DAT ASSIGNING <RN1ANF_DAT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1ANF_DAT>-MANDT = 1.
<RN1ANF_DAT>-EINRI = 1.
<RN1ANF_DAT>-ANFID = 1.
<RN1ANF_DAT>-ORGID = 1.
<RN1ANF_DAT>-ANFOE = 1.

ENDLOOP.

LOOP AT IT_RN1ANF_DAT INTO WA_RN1ANF_DAT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1ANF_DAT-ANPOE, sy-vline,
  WA_RN1ANF_DAT-ANFTY, sy-vline,
  WA_RN1ANF_DAT-ANFNR, sy-vline,
  WA_RN1ANF_DAT-FALNR, sy-vline,
  WA_RN1ANF_DAT-ANSTAE, sy-vline,
  WA_RN1ANF_DAT-APRI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1ANF_DAT 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_RN1ANF_DAT 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_RN1ANF_DAT INTO WA_RN1ANF_DAT.


*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_RN1ANF_DAT-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ANF_DAT-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-ORGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANFOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ANF_DAT-ANFOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-ANFOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANPOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ANF_DAT-ANPOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-ANPOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ANF_DAT-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALDIA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ANF_DAT-FALDIA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-FALDIA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ANF_DAT-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ANF_DAT-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ANF_DAT-ORGFD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-ORGFD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PAPID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ANF_DAT-PAPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ANF_DAT-PAPID.
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_RN1ANF_DAT_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
ANFID TYPE STRING,
ORGID TYPE STRING,
ANFOE TYPE STRING,
ANPOE TYPE STRING,
ANFTY TYPE STRING,
ANFNR TYPE STRING,
FALNR TYPE STRING,
ANSTAE TYPE STRING,
APRI TYPE STRING,
KANAM TYPE STRING,
KALTX TYPE STRING,
FALDIA TYPE STRING,
LFDDIA TYPE STRING,
FRAGE TYPE STRING,
FRLTX TYPE STRING,
SCHWKZ TYPE STRING,
SCHWO TYPE STRING,
LFDMEHR TYPE STRING,
TPAE TYPE STRING,
RCKRUF TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
BHANF TYPE STRING,
BHATX TYPE STRING,
PATNR TYPE STRING,
DITXT TYPE STRING,
DILTX TYPE STRING,
VBUND TYPE STRING,
MI TYPE STRING,
SM TYPE STRING,
KM TYPE STRING,
JOD TYPE STRING,
ANDERE TYPE STRING,
KGR TYPE STRING,
KGEW TYPE STRING,
RP TYPE STRING,
RPID TYPE STRING,
ORGFD TYPE STRING,
PAPID TYPE STRING,
PBGDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1ANF_DAT_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_RN1ANF_DAT_STR-MANDT sy-vline 
WA_RN1ANF_DAT_STR-EINRI sy-vline 
WA_RN1ANF_DAT_STR-ANFID sy-vline 
WA_RN1ANF_DAT_STR-ORGID sy-vline 
WA_RN1ANF_DAT_STR-ANFOE sy-vline 
WA_RN1ANF_DAT_STR-ANPOE sy-vline 
WA_RN1ANF_DAT_STR-ANFTY sy-vline 
WA_RN1ANF_DAT_STR-ANFNR sy-vline 
WA_RN1ANF_DAT_STR-FALNR sy-vline 
WA_RN1ANF_DAT_STR-ANSTAE sy-vline 
WA_RN1ANF_DAT_STR-APRI sy-vline 
WA_RN1ANF_DAT_STR-KANAM sy-vline 
WA_RN1ANF_DAT_STR-KALTX sy-vline 
WA_RN1ANF_DAT_STR-FALDIA sy-vline 
WA_RN1ANF_DAT_STR-LFDDIA sy-vline 
WA_RN1ANF_DAT_STR-FRAGE sy-vline 
WA_RN1ANF_DAT_STR-FRLTX sy-vline 
WA_RN1ANF_DAT_STR-SCHWKZ sy-vline 
WA_RN1ANF_DAT_STR-SCHWO sy-vline 
WA_RN1ANF_DAT_STR-LFDMEHR sy-vline 
WA_RN1ANF_DAT_STR-TPAE sy-vline 
WA_RN1ANF_DAT_STR-RCKRUF sy-vline 
WA_RN1ANF_DAT_STR-DOKAR sy-vline 
WA_RN1ANF_DAT_STR-DOKNR sy-vline 
WA_RN1ANF_DAT_STR-DOKVR sy-vline 
WA_RN1ANF_DAT_STR-DOKTL sy-vline 
WA_RN1ANF_DAT_STR-ERDAT sy-vline 
WA_RN1ANF_DAT_STR-ERUSR sy-vline 
WA_RN1ANF_DAT_STR-UPDAT sy-vline 
WA_RN1ANF_DAT_STR-UPUSR sy-vline 
WA_RN1ANF_DAT_STR-STORN sy-vline 
WA_RN1ANF_DAT_STR-STUSR sy-vline 
WA_RN1ANF_DAT_STR-STDAT sy-vline 
WA_RN1ANF_DAT_STR-BHANF sy-vline 
WA_RN1ANF_DAT_STR-BHATX sy-vline 
WA_RN1ANF_DAT_STR-PATNR sy-vline 
WA_RN1ANF_DAT_STR-DITXT sy-vline 
WA_RN1ANF_DAT_STR-DILTX sy-vline 
WA_RN1ANF_DAT_STR-VBUND sy-vline 
WA_RN1ANF_DAT_STR-MI sy-vline 
WA_RN1ANF_DAT_STR-SM sy-vline 
WA_RN1ANF_DAT_STR-KM sy-vline 
WA_RN1ANF_DAT_STR-JOD sy-vline 
WA_RN1ANF_DAT_STR-ANDERE sy-vline 
WA_RN1ANF_DAT_STR-KGR sy-vline 
WA_RN1ANF_DAT_STR-KGEW sy-vline 
WA_RN1ANF_DAT_STR-RP sy-vline 
WA_RN1ANF_DAT_STR-RPID sy-vline 
WA_RN1ANF_DAT_STR-ORGFD sy-vline 
WA_RN1ANF_DAT_STR-PAPID sy-vline 
WA_RN1ANF_DAT_STR-PBGDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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