ABAP Select data from SAP table WTYKOMB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WTYKOMB
*  INTO TABLE @DATA(IT_WTYKOMB2).
*--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_WTYKOMB INDEX 1 INTO DATA(WA_WTYKOMB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WTYKOMB>-CLMNO = 1.
<WTYKOMB>-CLMTY = 1.
<WTYKOMB>-REFDT = 1.
<WTYKOMB>-REFNO = 1.
<WTYKOMB>-OLDCN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WTYKOMB-AUTNO, sy-vline,
  WA_WTYKOMB-AUTNA, sy-vline,
  WA_WTYKOMB-CLERK, sy-vline,
  WA_WTYKOMB-RELTY, sy-vline,
  WA_WTYKOMB-RELOB, sy-vline,
  WA_WTYKOMB-RELOT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WTYKOMB 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_WTYKOMB 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_WTYKOMB INTO WA_WTYKOMB.


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

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

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_WTYKOMB-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WTYKOMB-PARVW.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit PARVW, internal->external for field V_PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_WTYKOMB-V_PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WTYKOMB-V_PARVW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSK
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_WTYKOMB-KURSK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WTYKOMB-KURSK.
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_WTYKOMB_STR, 
CLMNO TYPE STRING,
CLMTY TYPE STRING,
REFDT TYPE STRING,
REFNO TYPE STRING,
OLDCN TYPE STRING,
AUTNO TYPE STRING,
AUTNA TYPE STRING,
CLERK TYPE STRING,
RELTY TYPE STRING,
RELOB TYPE STRING,
RELOT TYPE STRING,
RELOB_EXT TYPE STRING,
RELDT TYPE STRING,
PARVW TYPE STRING,
ASTATE TYPE STRING,
QMNUM TYPE STRING,
VERSN TYPE STRING,
KATEG TYPE STRING,
V_REJCD TYPE STRING,
V_PARNR TYPE STRING,
V_PARVW TYPE STRING,
REFKT TYPE STRING,
REFNR TYPE STRING,
AKTIV TYPE STRING,
V_CRNCY TYPE STRING,
KURSK TYPE STRING,
PRICING_OK TYPE STRING,
NEW_VERSION TYPE STRING,
COMPSEND TYPE STRING,
NRART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WTYKOMB_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_WTYKOMB_STR-CLMNO sy-vline 
WA_WTYKOMB_STR-CLMTY sy-vline 
WA_WTYKOMB_STR-REFDT sy-vline 
WA_WTYKOMB_STR-REFNO sy-vline 
WA_WTYKOMB_STR-OLDCN sy-vline 
WA_WTYKOMB_STR-AUTNO sy-vline 
WA_WTYKOMB_STR-AUTNA sy-vline 
WA_WTYKOMB_STR-CLERK sy-vline 
WA_WTYKOMB_STR-RELTY sy-vline 
WA_WTYKOMB_STR-RELOB sy-vline 
WA_WTYKOMB_STR-RELOT sy-vline 
WA_WTYKOMB_STR-RELOB_EXT sy-vline 
WA_WTYKOMB_STR-RELDT sy-vline 
WA_WTYKOMB_STR-PARVW sy-vline 
WA_WTYKOMB_STR-ASTATE sy-vline 
WA_WTYKOMB_STR-QMNUM sy-vline 
WA_WTYKOMB_STR-VERSN sy-vline 
WA_WTYKOMB_STR-KATEG sy-vline 
WA_WTYKOMB_STR-V_REJCD sy-vline 
WA_WTYKOMB_STR-V_PARNR sy-vline 
WA_WTYKOMB_STR-V_PARVW sy-vline 
WA_WTYKOMB_STR-REFKT sy-vline 
WA_WTYKOMB_STR-REFNR sy-vline 
WA_WTYKOMB_STR-AKTIV sy-vline 
WA_WTYKOMB_STR-V_CRNCY sy-vline 
WA_WTYKOMB_STR-KURSK sy-vline 
WA_WTYKOMB_STR-PRICING_OK sy-vline 
WA_WTYKOMB_STR-NEW_VERSION sy-vline 
WA_WTYKOMB_STR-COMPSEND sy-vline 
WA_WTYKOMB_STR-NRART sy-vline      INTO ld_text SEPARATED BY SPACE.

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