ABAP Select data from SAP table RN2CLIO_DOCUMENT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN2CLIO_DOCUMENT 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 RN2CLIO_DOCUMENT. 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 RN2CLIO_DOCUMENT 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_RN2CLIO_DOCUMENT TYPE STANDARD TABLE OF RN2CLIO_DOCUMENT,
      WA_RN2CLIO_DOCUMENT TYPE RN2CLIO_DOCUMENT,
      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: <RN2CLIO_DOCUMENT> TYPE RN2CLIO_DOCUMENT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN2CLIO_DOCUMENT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN2CLIO_DOCUMENT
  INTO TABLE IT_RN2CLIO_DOCUMENT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN2CLIO_DOCUMENT
*  INTO TABLE @DATA(IT_RN2CLIO_DOCUMENT2).
*--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_RN2CLIO_DOCUMENT INDEX 1 INTO DATA(WA_RN2CLIO_DOCUMENT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN2CLIO_DOCUMENT ASSIGNING <RN2CLIO_DOCUMENT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN2CLIO_DOCUMENT>-DOKAR = 1.
<RN2CLIO_DOCUMENT>-DOKNR = 1.
<RN2CLIO_DOCUMENT>-DOKVR = 1.
<RN2CLIO_DOCUMENT>-DOKTL = 1.
<RN2CLIO_DOCUMENT>-LFDDOK = 1.

ENDLOOP.

LOOP AT IT_RN2CLIO_DOCUMENT INTO WA_RN2CLIO_DOCUMENT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN2CLIO_DOCUMENT-DODAT, sy-vline,
  WA_RN2CLIO_DOCUMENT-DOTIM, sy-vline,
  WA_RN2CLIO_DOCUMENT-DKTXT, sy-vline,
  WA_RN2CLIO_DOCUMENT-DTKB, sy-vline,
  WA_RN2CLIO_DOCUMENT-ORGDOKB, sy-vline,
  WA_RN2CLIO_DOCUMENT-VMAKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN2CLIO_DOCUMENT 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_RN2CLIO_DOCUMENT 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_RN2CLIO_DOCUMENT INTO WA_RN2CLIO_DOCUMENT.


*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_RN2CLIO_DOCUMENT-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_DOCUMENT-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_DOCUMENT-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_DOCUMENT-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_DOCUMENT-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_DOCUMENT-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MITARB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_DOCUMENT-MITARB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_DOCUMENT-MITARB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGDO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_DOCUMENT-ORGDO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_DOCUMENT-ORGDO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_DOCUMENT-ORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_DOCUMENT-ORGFA.
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_RN2CLIO_DOCUMENT_STR, 
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
LFDDOK TYPE STRING,
DODAT TYPE STRING,
DOTIM TYPE STRING,
DKTXT TYPE STRING,
DTKB TYPE STRING,
ORGDOKB TYPE STRING,
VMAKZ TYPE STRING,
STABK TYPE STRING,
DOSTX TYPE STRING,
FRKNZ TYPE STRING,
FRMT TYPE STRING,
MIMETYPE TYPE STRING,
EINRI TYPE STRING,
EINKB TYPE STRING,
FALNR TYPE STRING,
DTBEZ TYPE STRING,
VMALT TYPE STRING,
DTID TYPE STRING,
DTVERS TYPE STRING,
MITARB TYPE STRING,
ORGDO TYPE STRING,
DOKST TYPE STRING,
DARTXT TYPE STRING,
NUMVERS TYPE STRING,
NUMPART TYPE STRING,
NUMSERV TYPE STRING,
NUMMOVE TYPE STRING,
DOSAR TYPE STRING,
ORGFA TYPE STRING,
ORGFAKB TYPE STRING,
FLAGTEXT TYPE STRING,
PICON TYPE STRING,
STORELOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN2CLIO_DOCUMENT_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_RN2CLIO_DOCUMENT_STR-DOKAR sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DOKNR sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DOKVR sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DOKTL sy-vline 
WA_RN2CLIO_DOCUMENT_STR-LFDDOK sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DODAT sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DOTIM sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DKTXT sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DTKB sy-vline 
WA_RN2CLIO_DOCUMENT_STR-ORGDOKB sy-vline 
WA_RN2CLIO_DOCUMENT_STR-VMAKZ sy-vline 
WA_RN2CLIO_DOCUMENT_STR-STABK sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DOSTX sy-vline 
WA_RN2CLIO_DOCUMENT_STR-FRKNZ sy-vline 
WA_RN2CLIO_DOCUMENT_STR-FRMT sy-vline 
WA_RN2CLIO_DOCUMENT_STR-MIMETYPE sy-vline 
WA_RN2CLIO_DOCUMENT_STR-EINRI sy-vline 
WA_RN2CLIO_DOCUMENT_STR-EINKB sy-vline 
WA_RN2CLIO_DOCUMENT_STR-FALNR sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DTBEZ sy-vline 
WA_RN2CLIO_DOCUMENT_STR-VMALT sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DTID sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DTVERS sy-vline 
WA_RN2CLIO_DOCUMENT_STR-MITARB sy-vline 
WA_RN2CLIO_DOCUMENT_STR-ORGDO sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DOKST sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DARTXT sy-vline 
WA_RN2CLIO_DOCUMENT_STR-NUMVERS sy-vline 
WA_RN2CLIO_DOCUMENT_STR-NUMPART sy-vline 
WA_RN2CLIO_DOCUMENT_STR-NUMSERV sy-vline 
WA_RN2CLIO_DOCUMENT_STR-NUMMOVE sy-vline 
WA_RN2CLIO_DOCUMENT_STR-DOSAR sy-vline 
WA_RN2CLIO_DOCUMENT_STR-ORGFA sy-vline 
WA_RN2CLIO_DOCUMENT_STR-ORGFAKB sy-vline 
WA_RN2CLIO_DOCUMENT_STR-FLAGTEXT sy-vline 
WA_RN2CLIO_DOCUMENT_STR-PICON sy-vline 
WA_RN2CLIO_DOCUMENT_STR-STORELOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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