ABAP Select data from SAP table RNDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNDOC
*  INTO TABLE @DATA(IT_RNDOC2).
*--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_RNDOC INDEX 1 INTO DATA(WA_RNDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNDOC>-MANDT = 1.
<RNDOC>-DOKAR = 1.
<RNDOC>-DOKNR = 1.
<RNDOC>-DOKVR = 1.
<RNDOC>-DOKTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNDOC-LFDDOK, sy-vline,
  WA_RNDOC-ORGFORM, sy-vline,
  WA_RNDOC-EINRI, sy-vline,
  WA_RNDOC-PATNR, sy-vline,
  WA_RNDOC-FALNR, sy-vline,
  WA_RNDOC-FALAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNDOC 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_RNDOC 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_RNDOC INTO WA_RNDOC.


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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field STANDORT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNDOC-STANDORT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDOC-STANDORT.
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_RNDOC_STR, 
MANDT TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
LFDDOK TYPE STRING,
ORGFORM TYPE STRING,
EINRI TYPE STRING,
PATNR TYPE STRING,
FALNR TYPE STRING,
FALAR TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
ORGLE TYPE STRING,
ORGLA TYPE STRING,
ANFID TYPE STRING,
ORGDO TYPE STRING,
LEIST TYPE STRING,
LNRLS TYPE STRING,
LFDBEW TYPE STRING,
MITARB TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
DTID TYPE STRING,
DTVERS TYPE STRING,
BERST TYPE STRING,
BEZEB TYPE STRING,
MEDOK TYPE STRING,
PCODE TYPE STRING,
DODAT TYPE STRING,
DOTIM TYPE STRING,
ERUSR TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
UPUSR TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
LOEKZ TYPE STRING,
LOUSR TYPE STRING,
LODAT TYPE STRING,
LOTIM TYPE STRING,
STORELOC TYPE STRING,
STORELOC2 TYPE STRING,
ARCHIV TYPE STRING,
STANDORT TYPE STRING,
ROLLNO TYPE STRING,
MICROF TYPE STRING,
EXTNR TYPE STRING,
INFOMR TYPE STRING,
TEMPMR TYPE STRING,
ALBUM TYPE STRING,
MFYEAR TYPE STRING,
REDO_TYPE TYPE STRING,
REDO_KZ TYPE STRING,
CASE_ARCHIVED TYPE STRING,
UPDKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNDOC_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_RNDOC_STR-MANDT sy-vline 
WA_RNDOC_STR-DOKAR sy-vline 
WA_RNDOC_STR-DOKNR sy-vline 
WA_RNDOC_STR-DOKVR sy-vline 
WA_RNDOC_STR-DOKTL sy-vline 
WA_RNDOC_STR-LFDDOK sy-vline 
WA_RNDOC_STR-ORGFORM sy-vline 
WA_RNDOC_STR-EINRI sy-vline 
WA_RNDOC_STR-PATNR sy-vline 
WA_RNDOC_STR-FALNR sy-vline 
WA_RNDOC_STR-FALAR sy-vline 
WA_RNDOC_STR-ORGFA sy-vline 
WA_RNDOC_STR-ORGPF sy-vline 
WA_RNDOC_STR-ORGLE sy-vline 
WA_RNDOC_STR-ORGLA sy-vline 
WA_RNDOC_STR-ANFID sy-vline 
WA_RNDOC_STR-ORGDO sy-vline 
WA_RNDOC_STR-LEIST sy-vline 
WA_RNDOC_STR-LNRLS sy-vline 
WA_RNDOC_STR-LFDBEW sy-vline 
WA_RNDOC_STR-MITARB sy-vline 
WA_RNDOC_STR-STORN sy-vline 
WA_RNDOC_STR-STUSR sy-vline 
WA_RNDOC_STR-STDAT sy-vline 
WA_RNDOC_STR-DTID sy-vline 
WA_RNDOC_STR-DTVERS sy-vline 
WA_RNDOC_STR-BERST sy-vline 
WA_RNDOC_STR-BEZEB sy-vline 
WA_RNDOC_STR-MEDOK sy-vline 
WA_RNDOC_STR-PCODE sy-vline 
WA_RNDOC_STR-DODAT sy-vline 
WA_RNDOC_STR-DOTIM sy-vline 
WA_RNDOC_STR-ERUSR sy-vline 
WA_RNDOC_STR-ERDAT sy-vline 
WA_RNDOC_STR-ERTIM sy-vline 
WA_RNDOC_STR-UPUSR sy-vline 
WA_RNDOC_STR-UPDAT sy-vline 
WA_RNDOC_STR-UPTIM sy-vline 
WA_RNDOC_STR-LOEKZ sy-vline 
WA_RNDOC_STR-LOUSR sy-vline 
WA_RNDOC_STR-LODAT sy-vline 
WA_RNDOC_STR-LOTIM sy-vline 
WA_RNDOC_STR-STORELOC sy-vline 
WA_RNDOC_STR-STORELOC2 sy-vline 
WA_RNDOC_STR-ARCHIV sy-vline 
WA_RNDOC_STR-STANDORT sy-vline 
WA_RNDOC_STR-ROLLNO sy-vline 
WA_RNDOC_STR-MICROF sy-vline 
WA_RNDOC_STR-EXTNR sy-vline 
WA_RNDOC_STR-INFOMR sy-vline 
WA_RNDOC_STR-TEMPMR sy-vline 
WA_RNDOC_STR-ALBUM sy-vline 
WA_RNDOC_STR-MFYEAR sy-vline 
WA_RNDOC_STR-REDO_TYPE sy-vline 
WA_RNDOC_STR-REDO_KZ sy-vline 
WA_RNDOC_STR-CASE_ARCHIVED sy-vline 
WA_RNDOC_STR-UPDKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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