ABAP Select data from SAP table TKKAR into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKKAR
*  INTO TABLE @DATA(IT_TKKAR2).
*--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_TKKAR INDEX 1 INTO DATA(WA_TKKAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKKAR>-MANDT = 1.
<TKKAR>-KOKRS = 1.
<TKKAR>-VERSA = 1.
<TKKAR>-ABGSL = 1.
<TKKAR>-ZLNID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKKAR-KATEG, sy-vline,
  WA_TKKAR-KBSTB, sy-vline,
  WA_TKKAR-KBSTV, sy-vline,
  WA_TKKAR-KRUEB, sy-vline,
  WA_TKKAR-KRUEV, sy-vline,
  WA_TKKAR-KKDUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TKKAR 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_TKKAR 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_TKKAR INTO WA_TKKAR.


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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TKKAR-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKKAR-MEINH.
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_TKKAR_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
VERSA TYPE STRING,
ABGSL TYPE STRING,
ZLNID TYPE STRING,
KATEG TYPE STRING,
KBSTB TYPE STRING,
KBSTV TYPE STRING,
KRUEB TYPE STRING,
KRUEV TYPE STRING,
KKDUS TYPE STRING,
KZIFR TYPE STRING,
KZIFB TYPE STRING,
EVFLD TYPE STRING,
ZLNI1 TYPE STRING,
ZLNI2 TYPE STRING,
ZLNI3 TYPE STRING,
RFLG1 TYPE STRING,
RFLG2 TYPE STRING,
RFLG3 TYPE STRING,
MEINH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKKAR_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_TKKAR_STR-MANDT sy-vline 
WA_TKKAR_STR-KOKRS sy-vline 
WA_TKKAR_STR-VERSA sy-vline 
WA_TKKAR_STR-ABGSL sy-vline 
WA_TKKAR_STR-ZLNID sy-vline 
WA_TKKAR_STR-KATEG sy-vline 
WA_TKKAR_STR-KBSTB sy-vline 
WA_TKKAR_STR-KBSTV sy-vline 
WA_TKKAR_STR-KRUEB sy-vline 
WA_TKKAR_STR-KRUEV sy-vline 
WA_TKKAR_STR-KKDUS sy-vline 
WA_TKKAR_STR-KZIFR sy-vline 
WA_TKKAR_STR-KZIFB sy-vline 
WA_TKKAR_STR-EVFLD sy-vline 
WA_TKKAR_STR-ZLNI1 sy-vline 
WA_TKKAR_STR-ZLNI2 sy-vline 
WA_TKKAR_STR-ZLNI3 sy-vline 
WA_TKKAR_STR-RFLG1 sy-vline 
WA_TKKAR_STR-RFLG2 sy-vline 
WA_TKKAR_STR-RFLG3 sy-vline 
WA_TKKAR_STR-MEINH sy-vline      INTO ld_text SEPARATED BY SPACE.

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