ABAP Select data from SAP table RNAKER 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 RNAKER 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 RNAKER. 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 RNAKER 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_RNAKER TYPE STANDARD TABLE OF RNAKER,
      WA_RNAKER TYPE RNAKER,
      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: <RNAKER> TYPE RNAKER.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNAKER
*  INTO TABLE @DATA(IT_RNAKER2).
*--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_RNAKER INDEX 1 INTO DATA(WA_RNAKER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNAKER>-ORGID = 1.
<RNAKER>-ABINT = 1.
<RNAKER>-ABART = 1.
<RNAKER>-FALNR = 1.
<RNAKER>-VBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNAKER-FKDAT, sy-vline,
  WA_RNAKER-ERDAT, sy-vline,
  WA_RNAKER-FZIFF, sy-vline,
  WA_RNAKER-CONCATPAT, sy-vline,
  WA_RNAKER-WAERK, sy-vline,
  WA_RNAKER-NETWR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNAKER 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_RNAKER 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_RNAKER INTO WA_RNAKER.


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

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

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

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

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNAKER-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNAKER-VBELN.
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_RNAKER_STR, 
ORGID TYPE STRING,
ABINT TYPE STRING,
ABART TYPE STRING,
FALNR TYPE STRING,
VBELN TYPE STRING,
FKDAT TYPE STRING,
ERDAT TYPE STRING,
FZIFF TYPE STRING,
CONCATPAT TYPE STRING,
WAERK TYPE STRING,
NETWR TYPE STRING,
BRUWR TYPE STRING,
GESBTRAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNAKER_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_RNAKER_STR-ORGID sy-vline 
WA_RNAKER_STR-ABINT sy-vline 
WA_RNAKER_STR-ABART sy-vline 
WA_RNAKER_STR-FALNR sy-vline 
WA_RNAKER_STR-VBELN sy-vline 
WA_RNAKER_STR-FKDAT sy-vline 
WA_RNAKER_STR-ERDAT sy-vline 
WA_RNAKER_STR-FZIFF sy-vline 
WA_RNAKER_STR-CONCATPAT sy-vline 
WA_RNAKER_STR-WAERK sy-vline 
WA_RNAKER_STR-NETWR sy-vline 
WA_RNAKER_STR-BRUWR sy-vline 
WA_RNAKER_STR-GESBTRAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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