ABAP Select data from SAP table KKAPS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KKAPS
*  INTO TABLE @DATA(IT_KKAPS2).
*--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_KKAPS INDEX 1 INTO DATA(WA_KKAPS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KKAPS>-MANDT = 1.
<KKAPS>-KOKRS = 1.
<KKAPS>-GJAHR = 1.
<KKAPS>-VERSN = 1.
<KKAPS>-VRGNG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KKAPS-PERBL, sy-vline,
  WA_KKAPS-PSP001, sy-vline,
  WA_KKAPS-PSP002, sy-vline,
  WA_KKAPS-PSP003, sy-vline,
  WA_KKAPS-PSP004, sy-vline,
  WA_KKAPS-PSP005, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KKAPS 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_KKAPS 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_KKAPS INTO WA_KKAPS.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KKAPS-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKAPS-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KKAPS-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKAPS-VERSN.
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_KKAPS_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
GJAHR TYPE STRING,
VERSN TYPE STRING,
VRGNG TYPE STRING,
PERBL TYPE STRING,
PSP001 TYPE STRING,
PSP002 TYPE STRING,
PSP003 TYPE STRING,
PSP004 TYPE STRING,
PSP005 TYPE STRING,
PSP006 TYPE STRING,
PSP007 TYPE STRING,
PSP008 TYPE STRING,
PSP009 TYPE STRING,
PSP010 TYPE STRING,
PSP011 TYPE STRING,
PSP012 TYPE STRING,
PSP013 TYPE STRING,
PSP014 TYPE STRING,
PSP015 TYPE STRING,
PSP016 TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KKAPS_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_KKAPS_STR-MANDT sy-vline 
WA_KKAPS_STR-KOKRS sy-vline 
WA_KKAPS_STR-GJAHR sy-vline 
WA_KKAPS_STR-VERSN sy-vline 
WA_KKAPS_STR-VRGNG sy-vline 
WA_KKAPS_STR-PERBL sy-vline 
WA_KKAPS_STR-PSP001 sy-vline 
WA_KKAPS_STR-PSP002 sy-vline 
WA_KKAPS_STR-PSP003 sy-vline 
WA_KKAPS_STR-PSP004 sy-vline 
WA_KKAPS_STR-PSP005 sy-vline 
WA_KKAPS_STR-PSP006 sy-vline 
WA_KKAPS_STR-PSP007 sy-vline 
WA_KKAPS_STR-PSP008 sy-vline 
WA_KKAPS_STR-PSP009 sy-vline 
WA_KKAPS_STR-PSP010 sy-vline 
WA_KKAPS_STR-PSP011 sy-vline 
WA_KKAPS_STR-PSP012 sy-vline 
WA_KKAPS_STR-PSP013 sy-vline 
WA_KKAPS_STR-PSP014 sy-vline 
WA_KKAPS_STR-PSP015 sy-vline 
WA_KKAPS_STR-PSP016 sy-vline 
WA_KKAPS_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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