ABAP Select data from SAP table SCY_RKAKOA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCY_RKAKOA
*  INTO TABLE @DATA(IT_SCY_RKAKOA2).
*--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_SCY_RKAKOA INDEX 1 INTO DATA(WA_SCY_RKAKOA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCY_RKAKOA>-MANDT = 1.
<SCY_RKAKOA>-KAPID = 1.
<SCY_RKAKOA>-AZMAX = 1.
<SCY_RKAKOA>-AZNOR = 1.
<SCY_RKAKOA>-BASNE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCY_RKAKOA-BASZL, sy-vline,
  WA_SCY_RKAKOA-BEGZT, sy-vline,
  WA_SCY_RKAKOA-BRGRU, sy-vline,
  WA_SCY_RKAKOA-ENDZT, sy-vline,
  WA_SCY_RKAKOA-KALID, sy-vline,
  WA_SCY_RKAKOA-KAPAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCY_RKAKOA 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_SCY_RKAKOA 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_SCY_RKAKOA INTO WA_SCY_RKAKOA.


*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 CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SCY_RKAKOA-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SCY_RKAKOA-MEINS.
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_SCY_RKAKOA_STR, 
MANDT TYPE STRING,
KAPID TYPE STRING,
AZMAX TYPE STRING,
AZNOR TYPE STRING,
BASNE TYPE STRING,
BASZL TYPE STRING,
BEGZT TYPE STRING,
BRGRU TYPE STRING,
ENDZT TYPE STRING,
KALID TYPE STRING,
KAPAR TYPE STRING,
MEINS TYPE STRING,
MOSID TYPE STRING,
NAME TYPE STRING,
NGRAD TYPE STRING,
PAUSE TYPE STRING,
PLANR TYPE STRING,
POOLK TYPE STRING,
REFAN TYPE STRING,
REFAZ TYPE STRING,
REFID TYPE STRING,
SUPPK TYPE STRING,
VERSA TYPE STRING,
WERKS TYPE STRING,
KAPIE TYPE STRING,
KAPTER TYPE STRING,
KAPAVO TYPE STRING,
UEBERLAST TYPE STRING,
KAPLPL TYPE STRING,
KTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCY_RKAKOA_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_SCY_RKAKOA_STR-MANDT sy-vline 
WA_SCY_RKAKOA_STR-KAPID sy-vline 
WA_SCY_RKAKOA_STR-AZMAX sy-vline 
WA_SCY_RKAKOA_STR-AZNOR sy-vline 
WA_SCY_RKAKOA_STR-BASNE sy-vline 
WA_SCY_RKAKOA_STR-BASZL sy-vline 
WA_SCY_RKAKOA_STR-BEGZT sy-vline 
WA_SCY_RKAKOA_STR-BRGRU sy-vline 
WA_SCY_RKAKOA_STR-ENDZT sy-vline 
WA_SCY_RKAKOA_STR-KALID sy-vline 
WA_SCY_RKAKOA_STR-KAPAR sy-vline 
WA_SCY_RKAKOA_STR-MEINS sy-vline 
WA_SCY_RKAKOA_STR-MOSID sy-vline 
WA_SCY_RKAKOA_STR-NAME sy-vline 
WA_SCY_RKAKOA_STR-NGRAD sy-vline 
WA_SCY_RKAKOA_STR-PAUSE sy-vline 
WA_SCY_RKAKOA_STR-PLANR sy-vline 
WA_SCY_RKAKOA_STR-POOLK sy-vline 
WA_SCY_RKAKOA_STR-REFAN sy-vline 
WA_SCY_RKAKOA_STR-REFAZ sy-vline 
WA_SCY_RKAKOA_STR-REFID sy-vline 
WA_SCY_RKAKOA_STR-SUPPK sy-vline 
WA_SCY_RKAKOA_STR-VERSA sy-vline 
WA_SCY_RKAKOA_STR-WERKS sy-vline 
WA_SCY_RKAKOA_STR-KAPIE sy-vline 
WA_SCY_RKAKOA_STR-KAPTER sy-vline 
WA_SCY_RKAKOA_STR-KAPAVO sy-vline 
WA_SCY_RKAKOA_STR-UEBERLAST sy-vline 
WA_SCY_RKAKOA_STR-KAPLPL sy-vline 
WA_SCY_RKAKOA_STR-KTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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