ABAP Select data from SAP table CSKST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSKST
*  INTO TABLE @DATA(IT_CSKST2).
*--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_CSKST INDEX 1 INTO DATA(WA_CSKST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSKST>-MANDT = 1.
<CSKST>-KOKRS = 1.
<CSKST>-KOSTL = 1.
<CSKST>-DATBI = 1.
<CSKST>-DATAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSKST-BKZKP, sy-vline,
  WA_CSKST-BKZKS, sy-vline,
  WA_CSKST-BKZER, sy-vline,
  WA_CSKST-BKZOB, sy-vline,
  WA_CSKST-PKZKP, sy-vline,
  WA_CSKST-PKZKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSKST 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_CSKST 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_CSKST INTO WA_CSKST.


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

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field SPRAS2
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CSKST-SPRAS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSKST-SPRAS2.
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_CSKST_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
DATBI TYPE STRING,
DATAB TYPE STRING,
BKZKP TYPE STRING,
BKZKS TYPE STRING,
BKZER TYPE STRING,
BKZOB TYPE STRING,
PKZKP TYPE STRING,
PKZKS TYPE STRING,
PKZER TYPE STRING,
MGEFL TYPE STRING,
ABTEI TYPE STRING,
VERAK TYPE STRING,
VERAK_USER TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
PRCTR TYPE STRING,
WERKS TYPE STRING,
WAERS TYPE STRING,
OBJNR TYPE STRING,
KOMPL TYPE STRING,
KHINR TYPE STRING,
KOSAR TYPE STRING,
TXJCD TYPE STRING,
VNAME TYPE STRING,
RECID TYPE STRING,
ETYPE TYPE STRING,
LOGSYSTEM TYPE STRING,
KALSM TYPE STRING,
CPI_TEMPL TYPE STRING,
CPD_TEMPL TYPE STRING,
FUNC_AREA TYPE STRING,
SCI_TEMPL TYPE STRING,
SCD_TEMPL TYPE STRING,
SKI_TEMPL TYPE STRING,
SKD_TEMPL TYPE STRING,
ERSDA TYPE STRING,
USNAM TYPE STRING,
SPRAS2 TYPE STRING,
KTEXT TYPE STRING,
LTEXT TYPE STRING,
MCTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSKST_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_CSKST_STR-MANDT sy-vline 
WA_CSKST_STR-KOKRS sy-vline 
WA_CSKST_STR-KOSTL sy-vline 
WA_CSKST_STR-DATBI sy-vline 
WA_CSKST_STR-DATAB sy-vline 
WA_CSKST_STR-BKZKP sy-vline 
WA_CSKST_STR-BKZKS sy-vline 
WA_CSKST_STR-BKZER sy-vline 
WA_CSKST_STR-BKZOB sy-vline 
WA_CSKST_STR-PKZKP sy-vline 
WA_CSKST_STR-PKZKS sy-vline 
WA_CSKST_STR-PKZER sy-vline 
WA_CSKST_STR-MGEFL sy-vline 
WA_CSKST_STR-ABTEI sy-vline 
WA_CSKST_STR-VERAK sy-vline 
WA_CSKST_STR-VERAK_USER sy-vline 
WA_CSKST_STR-BUKRS sy-vline 
WA_CSKST_STR-GSBER sy-vline 
WA_CSKST_STR-PRCTR sy-vline 
WA_CSKST_STR-WERKS sy-vline 
WA_CSKST_STR-WAERS sy-vline 
WA_CSKST_STR-OBJNR sy-vline 
WA_CSKST_STR-KOMPL sy-vline 
WA_CSKST_STR-KHINR sy-vline 
WA_CSKST_STR-KOSAR sy-vline 
WA_CSKST_STR-TXJCD sy-vline 
WA_CSKST_STR-VNAME sy-vline 
WA_CSKST_STR-RECID sy-vline 
WA_CSKST_STR-ETYPE sy-vline 
WA_CSKST_STR-LOGSYSTEM sy-vline 
WA_CSKST_STR-KALSM sy-vline 
WA_CSKST_STR-CPI_TEMPL sy-vline 
WA_CSKST_STR-CPD_TEMPL sy-vline 
WA_CSKST_STR-FUNC_AREA sy-vline 
WA_CSKST_STR-SCI_TEMPL sy-vline 
WA_CSKST_STR-SCD_TEMPL sy-vline 
WA_CSKST_STR-SKI_TEMPL sy-vline 
WA_CSKST_STR-SKD_TEMPL sy-vline 
WA_CSKST_STR-ERSDA sy-vline 
WA_CSKST_STR-USNAM sy-vline 
WA_CSKST_STR-SPRAS2 sy-vline 
WA_CSKST_STR-KTEXT sy-vline 
WA_CSKST_STR-LTEXT sy-vline 
WA_CSKST_STR-MCTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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