ABAP Select data from SAP table RCK50_YS_KAWKA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCK50_YS_KAWKA 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 RCK50_YS_KAWKA. 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 RCK50_YS_KAWKA 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_RCK50_YS_KAWKA TYPE STANDARD TABLE OF RCK50_YS_KAWKA,
      WA_RCK50_YS_KAWKA TYPE RCK50_YS_KAWKA,
      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: <RCK50_YS_KAWKA> TYPE RCK50_YS_KAWKA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RCK50_YS_KAWKA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RCK50_YS_KAWKA
  INTO TABLE IT_RCK50_YS_KAWKA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCK50_YS_KAWKA
*  INTO TABLE @DATA(IT_RCK50_YS_KAWKA2).
*--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_RCK50_YS_KAWKA INDEX 1 INTO DATA(WA_RCK50_YS_KAWKA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RCK50_YS_KAWKA ASSIGNING <RCK50_YS_KAWKA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCK50_YS_KAWKA>-MATNR = 1.
<RCK50_YS_KAWKA>-WERKS = 1.
<RCK50_YS_KAWKA>-KLVAR = 1.
<RCK50_YS_KAWKA>-TVERS = 1.
<RCK50_YS_KAWKA>-KADAT = 1.

ENDLOOP.

LOOP AT IT_RCK50_YS_KAWKA INTO WA_RCK50_YS_KAWKA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCK50_YS_KAWKA-BIDAT, sy-vline,
  WA_RCK50_YS_KAWKA-KOKRS, sy-vline,
  WA_RCK50_YS_KAWKA-GSBER, sy-vline,
  WA_RCK50_YS_KAWKA-FEH_STA, sy-vline,
  WA_RCK50_YS_KAWKA-VORMDAT, sy-vline,
  WA_RCK50_YS_KAWKA-FREIDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCK50_YS_KAWKA 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_RCK50_YS_KAWKA 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_RCK50_YS_KAWKA INTO WA_RCK50_YS_KAWKA.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RCK50_YS_KAWKA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCK50_YS_KAWKA-MATNR.
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_RCK50_YS_KAWKA_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
KLVAR TYPE STRING,
TVERS TYPE STRING,
KADAT TYPE STRING,
BIDAT TYPE STRING,
KOKRS TYPE STRING,
GSBER TYPE STRING,
FEH_STA TYPE STRING,
VORMDAT TYPE STRING,
FREIDAT TYPE STRING,
KALST TYPE STRING,
SOBES TYPE STRING,
SOWRK TYPE STRING,
KZROH TYPE STRING,
MKALK TYPE STRING,
ERZKA TYPE STRING,
KKZMA TYPE STRING,
FREIG TYPE STRING,
BWTAR TYPE STRING,
PROCALT_NAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCK50_YS_KAWKA_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_RCK50_YS_KAWKA_STR-MATNR sy-vline 
WA_RCK50_YS_KAWKA_STR-WERKS sy-vline 
WA_RCK50_YS_KAWKA_STR-KLVAR sy-vline 
WA_RCK50_YS_KAWKA_STR-TVERS sy-vline 
WA_RCK50_YS_KAWKA_STR-KADAT sy-vline 
WA_RCK50_YS_KAWKA_STR-BIDAT sy-vline 
WA_RCK50_YS_KAWKA_STR-KOKRS sy-vline 
WA_RCK50_YS_KAWKA_STR-GSBER sy-vline 
WA_RCK50_YS_KAWKA_STR-FEH_STA sy-vline 
WA_RCK50_YS_KAWKA_STR-VORMDAT sy-vline 
WA_RCK50_YS_KAWKA_STR-FREIDAT sy-vline 
WA_RCK50_YS_KAWKA_STR-KALST sy-vline 
WA_RCK50_YS_KAWKA_STR-SOBES sy-vline 
WA_RCK50_YS_KAWKA_STR-SOWRK sy-vline 
WA_RCK50_YS_KAWKA_STR-KZROH sy-vline 
WA_RCK50_YS_KAWKA_STR-MKALK sy-vline 
WA_RCK50_YS_KAWKA_STR-ERZKA sy-vline 
WA_RCK50_YS_KAWKA_STR-KKZMA sy-vline 
WA_RCK50_YS_KAWKA_STR-FREIG sy-vline 
WA_RCK50_YS_KAWKA_STR-BWTAR sy-vline 
WA_RCK50_YS_KAWKA_STR-PROCALT_NAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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