ABAP Select data from SAP table KKA_IST 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 KKA_IST 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 KKA_IST. 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 KKA_IST 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_KKA_IST TYPE STANDARD TABLE OF KKA_IST,
      WA_KKA_IST TYPE KKA_IST,
      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: <KKA_IST> TYPE KKA_IST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KKA_IST
*  INTO TABLE @DATA(IT_KKA_IST2).
*--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_KKA_IST INDEX 1 INTO DATA(WA_KKA_IST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KKA_IST>-ERLOES = 1.
<KKA_IST>-ENTLASTUNG = 1.
<KKA_IST>-OBJNR = 1.
<KKA_IST>-KSTAR = 1.
<KKA_IST>-WRTK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KKA_IST-WRTJ, sy-vline,
  WA_KKA_IST-WRT, sy-vline,
  WA_KKA_IST-OWRTK, sy-vline,
  WA_KKA_IST-OWRTJ, sy-vline,
  WA_KKA_IST-OWRT, sy-vline,
  WA_KKA_IST-FWRTK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KKA_IST 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_KKA_IST 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_KKA_IST INTO WA_KKA_IST.


*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_KKA_IST-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WRTK
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KKA_IST-WRTK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-WRTK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WRTJ
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KKA_IST-WRTJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-WRTJ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WRT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KKA_IST-WRT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-WRT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field OWRTK
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KKA_IST-OWRTK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-OWRTK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field OWRTJ
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KKA_IST-OWRTJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-OWRTJ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field OWRT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KKA_IST-OWRT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-OWRT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field FWRTK
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KKA_IST-FWRTK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-FWRTK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field FWRTJ
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KKA_IST-FWRTJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-FWRTJ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field FWRT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KKA_IST-FWRT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KKA_IST-FWRT.
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_KKA_IST_STR, 
ERLOES TYPE STRING,
ENTLASTUNG TYPE STRING,
OBJNR TYPE STRING,
KSTAR TYPE STRING,
WRTK TYPE STRING,
WRTJ TYPE STRING,
WRT TYPE STRING,
OWRTK TYPE STRING,
OWRTJ TYPE STRING,
OWRT TYPE STRING,
FWRTK TYPE STRING,
FWRTJ TYPE STRING,
FWRT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KKA_IST_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_KKA_IST_STR-ERLOES sy-vline 
WA_KKA_IST_STR-ENTLASTUNG sy-vline 
WA_KKA_IST_STR-OBJNR sy-vline 
WA_KKA_IST_STR-KSTAR sy-vline 
WA_KKA_IST_STR-WRTK sy-vline 
WA_KKA_IST_STR-WRTJ sy-vline 
WA_KKA_IST_STR-WRT sy-vline 
WA_KKA_IST_STR-OWRTK sy-vline 
WA_KKA_IST_STR-OWRTJ sy-vline 
WA_KKA_IST_STR-OWRT sy-vline 
WA_KKA_IST_STR-FWRTK sy-vline 
WA_KKA_IST_STR-FWRTJ sy-vline 
WA_KKA_IST_STR-FWRT sy-vline      INTO ld_text SEPARATED BY SPACE.

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