ABAP Select data from SAP table RN2DOCDATA_FNAME into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN2DOCDATA_FNAME 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 RN2DOCDATA_FNAME. 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 RN2DOCDATA_FNAME 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_RN2DOCDATA_FNAME TYPE STANDARD TABLE OF RN2DOCDATA_FNAME,
      WA_RN2DOCDATA_FNAME TYPE RN2DOCDATA_FNAME,
      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: <RN2DOCDATA_FNAME> TYPE RN2DOCDATA_FNAME.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN2DOCDATA_FNAME.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN2DOCDATA_FNAME
  INTO TABLE IT_RN2DOCDATA_FNAME.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN2DOCDATA_FNAME
*  INTO TABLE @DATA(IT_RN2DOCDATA_FNAME2).
*--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_RN2DOCDATA_FNAME INDEX 1 INTO DATA(WA_RN2DOCDATA_FNAME2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN2DOCDATA_FNAME ASSIGNING <RN2DOCDATA_FNAME>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN2DOCDATA_FNAME>-DOKAR = 1.
<RN2DOCDATA_FNAME>-DOKNR = 1.
<RN2DOCDATA_FNAME>-DOKTL = 1.
<RN2DOCDATA_FNAME>-DOKVR = 1.
<RN2DOCDATA_FNAME>-EINRI = 1.

ENDLOOP.

LOOP AT IT_RN2DOCDATA_FNAME INTO WA_RN2DOCDATA_FNAME.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN2DOCDATA_FNAME-PATNR, sy-vline,
  WA_RN2DOCDATA_FNAME-FALNR, sy-vline,
  WA_RN2DOCDATA_FNAME-ORGDO, sy-vline,
  WA_RN2DOCDATA_FNAME-ORGFA, sy-vline,
  WA_RN2DOCDATA_FNAME-ORGPF, sy-vline,
  WA_RN2DOCDATA_FNAME-ORGLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN2DOCDATA_FNAME 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_RN2DOCDATA_FNAME 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_RN2DOCDATA_FNAME INTO WA_RN2DOCDATA_FNAME.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RN2DOCDATA_FNAME_STR, 
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
EINRI TYPE STRING,
PATNR TYPE STRING,
FALNR TYPE STRING,
ORGDO TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
ORGLE TYPE STRING,
ORGLA TYPE STRING,
MITARB TYPE STRING,
DTID TYPE STRING,
DTVERS TYPE STRING,
PCODE TYPE STRING,
DODAT TYPE STRING,
DOTIM TYPE STRING,
DWNAM TYPE STRING,
STATUSEXTERN TYPE STRING,
DOKST TYPE STRING,
BEGRU TYPE STRING,
FILEP TYPE STRING,
DAPPL TYPE STRING,
VPRIOR TYPE STRING,
RES1 TYPE STRING,
RES2 TYPE STRING,
RES3 TYPE STRING,
RES4 TYPE STRING,
DKTXT TYPE STRING,
PROTF TYPE STRING,
LFDBEW TYPE STRING,
LNRLS TYPE STRING,
ANFID TYPE STRING,
COMMIT_FLAG TYPE STRING,
UPDATE_TASK TYPE STRING,
BAPI_MODE TYPE STRING,
METHOD TYPE STRING,
TESTRUN TYPE STRING,
MESSAGE_COLLECT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN2DOCDATA_FNAME_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_RN2DOCDATA_FNAME_STR-DOKAR sy-vline 
WA_RN2DOCDATA_FNAME_STR-DOKNR sy-vline 
WA_RN2DOCDATA_FNAME_STR-DOKTL sy-vline 
WA_RN2DOCDATA_FNAME_STR-DOKVR sy-vline 
WA_RN2DOCDATA_FNAME_STR-EINRI sy-vline 
WA_RN2DOCDATA_FNAME_STR-PATNR sy-vline 
WA_RN2DOCDATA_FNAME_STR-FALNR sy-vline 
WA_RN2DOCDATA_FNAME_STR-ORGDO sy-vline 
WA_RN2DOCDATA_FNAME_STR-ORGFA sy-vline 
WA_RN2DOCDATA_FNAME_STR-ORGPF sy-vline 
WA_RN2DOCDATA_FNAME_STR-ORGLE sy-vline 
WA_RN2DOCDATA_FNAME_STR-ORGLA sy-vline 
WA_RN2DOCDATA_FNAME_STR-MITARB sy-vline 
WA_RN2DOCDATA_FNAME_STR-DTID sy-vline 
WA_RN2DOCDATA_FNAME_STR-DTVERS sy-vline 
WA_RN2DOCDATA_FNAME_STR-PCODE sy-vline 
WA_RN2DOCDATA_FNAME_STR-DODAT sy-vline 
WA_RN2DOCDATA_FNAME_STR-DOTIM sy-vline 
WA_RN2DOCDATA_FNAME_STR-DWNAM sy-vline 
WA_RN2DOCDATA_FNAME_STR-STATUSEXTERN sy-vline 
WA_RN2DOCDATA_FNAME_STR-DOKST sy-vline 
WA_RN2DOCDATA_FNAME_STR-BEGRU sy-vline 
WA_RN2DOCDATA_FNAME_STR-FILEP sy-vline 
WA_RN2DOCDATA_FNAME_STR-DAPPL sy-vline 
WA_RN2DOCDATA_FNAME_STR-VPRIOR sy-vline 
WA_RN2DOCDATA_FNAME_STR-RES1 sy-vline 
WA_RN2DOCDATA_FNAME_STR-RES2 sy-vline 
WA_RN2DOCDATA_FNAME_STR-RES3 sy-vline 
WA_RN2DOCDATA_FNAME_STR-RES4 sy-vline 
WA_RN2DOCDATA_FNAME_STR-DKTXT sy-vline 
WA_RN2DOCDATA_FNAME_STR-PROTF sy-vline 
WA_RN2DOCDATA_FNAME_STR-LFDBEW sy-vline 
WA_RN2DOCDATA_FNAME_STR-LNRLS sy-vline 
WA_RN2DOCDATA_FNAME_STR-ANFID sy-vline 
WA_RN2DOCDATA_FNAME_STR-COMMIT_FLAG sy-vline 
WA_RN2DOCDATA_FNAME_STR-UPDATE_TASK sy-vline 
WA_RN2DOCDATA_FNAME_STR-BAPI_MODE sy-vline 
WA_RN2DOCDATA_FNAME_STR-METHOD sy-vline 
WA_RN2DOCDATA_FNAME_STR-TESTRUN sy-vline 
WA_RN2DOCDATA_FNAME_STR-MESSAGE_COLLECT sy-vline      INTO ld_text SEPARATED BY SPACE.

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