ABAP Select data from SAP table RFKCR500 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFKCR500 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 RFKCR500. 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 RFKCR500 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_RFKCR500 TYPE STANDARD TABLE OF RFKCR500,
      WA_RFKCR500 TYPE RFKCR500,
      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: <RFKCR500> TYPE RFKCR500.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFKCR500.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFKCR500
  INTO TABLE IT_RFKCR500.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKCR500
*  INTO TABLE @DATA(IT_RFKCR5002).
*--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_RFKCR500 INDEX 1 INTO DATA(WA_RFKCR5002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFKCR500 ASSIGNING <RFKCR500>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKCR500>-MANDT = 1.
<RFKCR500>-HERKF = 1.
<RFKCR500>-ORG1T = 1.
<RFKCR500>-ORG1R = 1.
<RFKCR500>-HBKID = 1.

ENDLOOP.

LOOP AT IT_RFKCR500 INTO WA_RFKCR500.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKCR500-HKTID, sy-vline,
  WA_RFKCR500-ZTART, sy-vline,
  WA_RFKCR500-ZTNUM, sy-vline,
  WA_RFKCR500-LAUFD, sy-vline,
  WA_RFKCR500-LAUFI, sy-vline,
  WA_RFKCR500-ZAWET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKCR500 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_RFKCR500 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_RFKCR500 INTO WA_RFKCR500.


*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 ZTNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKCR500-ZTNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKCR500-ZTNUM.
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_RFKCR500_STR, 
MANDT TYPE STRING,
HERKF TYPE STRING,
ORG1T TYPE STRING,
ORG1R TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
ZTART TYPE STRING,
ZTNUM TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
ZAWET TYPE STRING,
ZAWER TYPE STRING,
GPA1T TYPE STRING,
GPA1R TYPE STRING,
GPA2P TYPE STRING,
ACC1T TYPE STRING,
ACC1R TYPE STRING,
DOC1T TYPE STRING,
DOC1R TYPE STRING,
BBUKR TYPE STRING,
BGSBR TYPE STRING,
WAERS TYPE STRING,
EWAER TYPE STRING,
RBETR TYPE STRING,
RWBTR TYPE STRING,
BUDAT TYPE STRING,
VALUT TYPE STRING,
FAEDN TYPE STRING,
STATE TYPE STRING,
VALID TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,
BNKDT TYPE STRING,
DOC2T TYPE STRING,
DOC2R TYPE STRING,
CASHR TYPE STRING,
CASHRD TYPE STRING,
CASHRT TYPE STRING,
CRADD TYPE STRING,
BLGRP TYPE STRING,
LINK TYPE STRING,
ESCHDT TYPE STRING,
ESCHRC_ORI TYPE STRING,
ESCHTYPE TYPE STRING,
ESCHSTAT TYPE STRING,
REFLEN TYPE STRING,
REFERENCE TYPE STRING,
VOIDRS TYPE STRING,
VOIDR TYPE STRING,
VOIDRD TYPE STRING,
VOIDRT TYPE STRING,
VOIDK TYPE STRING,
VDDAT TYPE STRING,
VDNAM TYPE STRING,
AUNAM TYPE STRING,
AUORT TYPE STRING,
NEWSTATE TYPE STRING,
STATE_TXT TYPE STRING,
ZTART_TXT TYPE STRING,
NUMTYP TYPE STRING,
GPART_TXT TYPE STRING,
PAYRUN_TXT TYPE STRING,
LINK_TXT TYPE STRING,
VTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKCR500_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_RFKCR500_STR-MANDT sy-vline 
WA_RFKCR500_STR-HERKF sy-vline 
WA_RFKCR500_STR-ORG1T sy-vline 
WA_RFKCR500_STR-ORG1R sy-vline 
WA_RFKCR500_STR-HBKID sy-vline 
WA_RFKCR500_STR-HKTID sy-vline 
WA_RFKCR500_STR-ZTART sy-vline 
WA_RFKCR500_STR-ZTNUM sy-vline 
WA_RFKCR500_STR-LAUFD sy-vline 
WA_RFKCR500_STR-LAUFI sy-vline 
WA_RFKCR500_STR-ZAWET sy-vline 
WA_RFKCR500_STR-ZAWER sy-vline 
WA_RFKCR500_STR-GPA1T sy-vline 
WA_RFKCR500_STR-GPA1R sy-vline 
WA_RFKCR500_STR-GPA2P sy-vline 
WA_RFKCR500_STR-ACC1T sy-vline 
WA_RFKCR500_STR-ACC1R sy-vline 
WA_RFKCR500_STR-DOC1T sy-vline 
WA_RFKCR500_STR-DOC1R sy-vline 
WA_RFKCR500_STR-BBUKR sy-vline 
WA_RFKCR500_STR-BGSBR sy-vline 
WA_RFKCR500_STR-WAERS sy-vline 
WA_RFKCR500_STR-EWAER sy-vline 
WA_RFKCR500_STR-RBETR sy-vline 
WA_RFKCR500_STR-RWBTR sy-vline 
WA_RFKCR500_STR-BUDAT sy-vline 
WA_RFKCR500_STR-VALUT sy-vline 
WA_RFKCR500_STR-FAEDN sy-vline 
WA_RFKCR500_STR-STATE sy-vline 
WA_RFKCR500_STR-VALID sy-vline 
WA_RFKCR500_STR-ERDAT sy-vline 
WA_RFKCR500_STR-ERTIM sy-vline 
WA_RFKCR500_STR-ERNAM sy-vline 
WA_RFKCR500_STR-AEDAT sy-vline 
WA_RFKCR500_STR-AETIM sy-vline 
WA_RFKCR500_STR-AENAM sy-vline 
WA_RFKCR500_STR-BNKDT sy-vline 
WA_RFKCR500_STR-DOC2T sy-vline 
WA_RFKCR500_STR-DOC2R sy-vline 
WA_RFKCR500_STR-CASHR sy-vline 
WA_RFKCR500_STR-CASHRD sy-vline 
WA_RFKCR500_STR-CASHRT sy-vline 
WA_RFKCR500_STR-CRADD sy-vline 
WA_RFKCR500_STR-BLGRP sy-vline 
WA_RFKCR500_STR-LINK sy-vline 
WA_RFKCR500_STR-ESCHDT sy-vline 
WA_RFKCR500_STR-ESCHRC_ORI sy-vline 
WA_RFKCR500_STR-ESCHTYPE sy-vline 
WA_RFKCR500_STR-ESCHSTAT sy-vline 
WA_RFKCR500_STR-REFLEN sy-vline 
WA_RFKCR500_STR-REFERENCE sy-vline 
WA_RFKCR500_STR-VOIDRS sy-vline 
WA_RFKCR500_STR-VOIDR sy-vline 
WA_RFKCR500_STR-VOIDRD sy-vline 
WA_RFKCR500_STR-VOIDRT sy-vline 
WA_RFKCR500_STR-VOIDK sy-vline 
WA_RFKCR500_STR-VDDAT sy-vline 
WA_RFKCR500_STR-VDNAM sy-vline 
WA_RFKCR500_STR-AUNAM sy-vline 
WA_RFKCR500_STR-AUORT sy-vline 
WA_RFKCR500_STR-NEWSTATE sy-vline 
WA_RFKCR500_STR-STATE_TXT sy-vline 
WA_RFKCR500_STR-ZTART_TXT sy-vline 
WA_RFKCR500_STR-NUMTYP sy-vline 
WA_RFKCR500_STR-GPART_TXT sy-vline 
WA_RFKCR500_STR-PAYRUN_TXT sy-vline 
WA_RFKCR500_STR-LINK_TXT sy-vline 
WA_RFKCR500_STR-VTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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