ABAP Select data from SAP table CSKAF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSKAF
*  INTO TABLE @DATA(IT_CSKAF2).
*--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_CSKAF INDEX 1 INTO DATA(WA_CSKAF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSKAF>-KOKRS = 1.
<CSKAF>-KSTAR = 1.
<CSKAF>-BUPER = 1.
<CSKAF>-KATYP = 1.
<CSKAF>-MGEFL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSKAF-MSEHI, sy-vline,
  WA_CSKAF-EIGEN, sy-vline,
  WA_CSKAF-COMPL, sy-vline,
  WA_CSKAF-KTEXT, sy-vline,
  WA_CSKAF-RECID, sy-vline,
  WA_CSKAF-LTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSKAF 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_CSKAF 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_CSKAF INTO WA_CSKAF.


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

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

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

*Conversion exit ALPHA, internal->external for field RECID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CSKAF-RECID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSKAF-RECID.
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_CSKAF_STR, 
KOKRS TYPE STRING,
KSTAR TYPE STRING,
BUPER TYPE STRING,
KATYP TYPE STRING,
MGEFL TYPE STRING,
MSEHI TYPE STRING,
EIGEN TYPE STRING,
COMPL TYPE STRING,
KTEXT TYPE STRING,
RECID TYPE STRING,
LTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSKAF_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_CSKAF_STR-KOKRS sy-vline 
WA_CSKAF_STR-KSTAR sy-vline 
WA_CSKAF_STR-BUPER sy-vline 
WA_CSKAF_STR-KATYP sy-vline 
WA_CSKAF_STR-MGEFL sy-vline 
WA_CSKAF_STR-MSEHI sy-vline 
WA_CSKAF_STR-EIGEN sy-vline 
WA_CSKAF_STR-COMPL sy-vline 
WA_CSKAF_STR-KTEXT sy-vline 
WA_CSKAF_STR-RECID sy-vline 
WA_CSKAF_STR-LTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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