ABAP Select data from SAP table RCRKAPA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCRKAPA
*  INTO TABLE @DATA(IT_RCRKAPA2).
*--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_RCRKAPA INDEX 1 INTO DATA(WA_RCRKAPA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCRKAPA>-MANDT = 1.
<RCRKAPA>-KAPID = 1.
<RCRKAPA>-VERSN = 1.
<RCRKAPA>-DATUB = 1.
<RCRKAPA>-TAGNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCRKAPA-SCHNR, sy-vline,
  WA_RCRKAPA-ANZHL, sy-vline,
  WA_RCRKAPA-BEGZT, sy-vline,
  WA_RCRKAPA-EINZT, sy-vline,
  WA_RCRKAPA-ENDZT, sy-vline,
  WA_RCRKAPA-FABTG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCRKAPA 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_RCRKAPA 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_RCRKAPA INTO WA_RCRKAPA.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RCRKAPA_STR, 
MANDT TYPE STRING,
KAPID TYPE STRING,
VERSN TYPE STRING,
DATUB TYPE STRING,
TAGNR TYPE STRING,
SCHNR TYPE STRING,
ANZHL TYPE STRING,
BEGZT TYPE STRING,
EINZT TYPE STRING,
ENDZT TYPE STRING,
FABTG TYPE STRING,
KAPAZ TYPE STRING,
PAUSE TYPE STRING,
NGRAD TYPE STRING,
TPROG TYPE STRING,
WOTAG TYPE STRING,
ANG_MIN TYPE STRING,
ANG_MAX TYPE STRING,
UKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCRKAPA_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_RCRKAPA_STR-MANDT sy-vline 
WA_RCRKAPA_STR-KAPID sy-vline 
WA_RCRKAPA_STR-VERSN sy-vline 
WA_RCRKAPA_STR-DATUB sy-vline 
WA_RCRKAPA_STR-TAGNR sy-vline 
WA_RCRKAPA_STR-SCHNR sy-vline 
WA_RCRKAPA_STR-ANZHL sy-vline 
WA_RCRKAPA_STR-BEGZT sy-vline 
WA_RCRKAPA_STR-EINZT sy-vline 
WA_RCRKAPA_STR-ENDZT sy-vline 
WA_RCRKAPA_STR-FABTG sy-vline 
WA_RCRKAPA_STR-KAPAZ sy-vline 
WA_RCRKAPA_STR-PAUSE sy-vline 
WA_RCRKAPA_STR-NGRAD sy-vline 
WA_RCRKAPA_STR-TPROG sy-vline 
WA_RCRKAPA_STR-WOTAG sy-vline 
WA_RCRKAPA_STR-ANG_MIN sy-vline 
WA_RCRKAPA_STR-ANG_MAX sy-vline 
WA_RCRKAPA_STR-UKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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