ABAP Select data from SAP table REF_KONTRAKT_POS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REF_KONTRAKT_POS
*  INTO TABLE @DATA(IT_REF_KONTRAKT_POS2).
*--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_REF_KONTRAKT_POS INDEX 1 INTO DATA(WA_REF_KONTRAKT_POS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REF_KONTRAKT_POS>-EBELN = 1.
<REF_KONTRAKT_POS>-EBELP = 1.
<REF_KONTRAKT_POS>-UEBPO = 1.
<REF_KONTRAKT_POS>-WERKS = 1.
<REF_KONTRAKT_POS>-MEINS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REF_KONTRAKT_POS-KTMNG, sy-vline,
  WA_REF_KONTRAKT_POS-KOMNG, sy-vline,
  WA_REF_KONTRAKT_POS-ABMNG, sy-vline,
  WA_REF_KONTRAKT_POS-LMEIN, sy-vline,
  WA_REF_KONTRAKT_POS-AKTNR, sy-vline,
  WA_REF_KONTRAKT_POS-LIFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REF_KONTRAKT_POS 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_REF_KONTRAKT_POS 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_REF_KONTRAKT_POS INTO WA_REF_KONTRAKT_POS.


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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REF_KONTRAKT_POS-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REF_KONTRAKT_POS-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REF_KONTRAKT_POS-LMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REF_KONTRAKT_POS-LMEIN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REF_KONTRAKT_POS-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REF_KONTRAKT_POS-LIFNR.
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_REF_KONTRAKT_POS_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
UEBPO TYPE STRING,
WERKS TYPE STRING,
MEINS TYPE STRING,
KTMNG TYPE STRING,
KOMNG TYPE STRING,
ABMNG TYPE STRING,
LMEIN TYPE STRING,
AKTNR TYPE STRING,
LIFNR TYPE STRING,
KDATB TYPE STRING,
KDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REF_KONTRAKT_POS_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_REF_KONTRAKT_POS_STR-EBELN sy-vline 
WA_REF_KONTRAKT_POS_STR-EBELP sy-vline 
WA_REF_KONTRAKT_POS_STR-UEBPO sy-vline 
WA_REF_KONTRAKT_POS_STR-WERKS sy-vline 
WA_REF_KONTRAKT_POS_STR-MEINS sy-vline 
WA_REF_KONTRAKT_POS_STR-KTMNG sy-vline 
WA_REF_KONTRAKT_POS_STR-KOMNG sy-vline 
WA_REF_KONTRAKT_POS_STR-ABMNG sy-vline 
WA_REF_KONTRAKT_POS_STR-LMEIN sy-vline 
WA_REF_KONTRAKT_POS_STR-AKTNR sy-vline 
WA_REF_KONTRAKT_POS_STR-LIFNR sy-vline 
WA_REF_KONTRAKT_POS_STR-KDATB sy-vline 
WA_REF_KONTRAKT_POS_STR-KDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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