ABAP Select data from SAP table RFKI1 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 RFKI1 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 RFKI1. 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 RFKI1 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_RFKI1 TYPE STANDARD TABLE OF RFKI1,
      WA_RFKI1 TYPE RFKI1,
      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: <RFKI1> TYPE RFKI1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFKI1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFKI1
  INTO TABLE IT_RFKI1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKI1
*  INTO TABLE @DATA(IT_RFKI12).
*--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_RFKI1 INDEX 1 INTO DATA(WA_RFKI12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFKI1 ASSIGNING <RFKI1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKI1>-APPLK = 1.
<RFKI1>-HERKF = 1.
<RFKI1>-BUDAT = 1.
<RFKI1>-BLDAT = 1.
<RFKI1>-AUSDT = 1.

ENDLOOP.

LOOP AT IT_RFKI1 INTO WA_RFKI1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKI1-BLART, sy-vline,
  WA_RFKI1-WAERS, sy-vline,
  WA_RFKI1-STAKZ, sy-vline,
  WA_RFKI1-AUGRS, sy-vline,
  WA_RFKI1-FIKEY, sy-vline,
  WA_RFKI1-XEIBH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKI1 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_RFKI1 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_RFKI1 INTO WA_RFKI1.


*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 GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1-VTREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RPNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1-RPNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1-RPNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IOPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKI1-IOPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKI1-IOPBEL.
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_RFKI1_STR, 
APPLK TYPE STRING,
HERKF TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
AUSDT TYPE STRING,
BLART TYPE STRING,
WAERS TYPE STRING,
STAKZ TYPE STRING,
AUGRS TYPE STRING,
FIKEY TYPE STRING,
XEIBH TYPE STRING,
GPART TYPE STRING,
BUKRS TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
IKEY TYPE STRING,
FAEDN TYPE STRING,
OPTXT TYPE STRING,
RPNUM TYPE STRING,
XODUEIP TYPE STRING,
IOPBEL TYPE STRING,
VZBIS TYPE STRING,
ENDDT TYPE STRING,
STTDT TYPE STRING,
XOPEN TYPE STRING,
XALLITEMS TYPE STRING,
XCLOSED TYPE STRING,
CREDIT TYPE STRING,
DEBIT TYPE STRING,
DEBCRED TYPE STRING,
CASHDEP TYPE STRING,
LOAN TYPE STRING,
DISPLAY TYPE STRING,
XEXTERN TYPE STRING,
XDIALOG TYPE STRING,
XDIRECT TYPE STRING,
XNOREAD TYPE STRING,
XNOROUND TYPE STRING,
XNOBOLLO TYPE STRING,
XDZINS TYPE STRING,
TCHEADER TYPE STRING,
XZIRP TYPE STRING,
XZINE TYPE STRING,
AUGRSB TYPE STRING,
XFAEDIP TYPE STRING,
XVKINTDOC TYPE STRING,
XMBEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKI1_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_RFKI1_STR-APPLK sy-vline 
WA_RFKI1_STR-HERKF sy-vline 
WA_RFKI1_STR-BUDAT sy-vline 
WA_RFKI1_STR-BLDAT sy-vline 
WA_RFKI1_STR-AUSDT sy-vline 
WA_RFKI1_STR-BLART sy-vline 
WA_RFKI1_STR-WAERS sy-vline 
WA_RFKI1_STR-STAKZ sy-vline 
WA_RFKI1_STR-AUGRS sy-vline 
WA_RFKI1_STR-FIKEY sy-vline 
WA_RFKI1_STR-XEIBH sy-vline 
WA_RFKI1_STR-GPART sy-vline 
WA_RFKI1_STR-BUKRS sy-vline 
WA_RFKI1_STR-VKONT sy-vline 
WA_RFKI1_STR-VTREF sy-vline 
WA_RFKI1_STR-SUBAP sy-vline 
WA_RFKI1_STR-IKEY sy-vline 
WA_RFKI1_STR-FAEDN sy-vline 
WA_RFKI1_STR-OPTXT sy-vline 
WA_RFKI1_STR-RPNUM sy-vline 
WA_RFKI1_STR-XODUEIP sy-vline 
WA_RFKI1_STR-IOPBEL sy-vline 
WA_RFKI1_STR-VZBIS sy-vline 
WA_RFKI1_STR-ENDDT sy-vline 
WA_RFKI1_STR-STTDT sy-vline 
WA_RFKI1_STR-XOPEN sy-vline 
WA_RFKI1_STR-XALLITEMS sy-vline 
WA_RFKI1_STR-XCLOSED sy-vline 
WA_RFKI1_STR-CREDIT sy-vline 
WA_RFKI1_STR-DEBIT sy-vline 
WA_RFKI1_STR-DEBCRED sy-vline 
WA_RFKI1_STR-CASHDEP sy-vline 
WA_RFKI1_STR-LOAN sy-vline 
WA_RFKI1_STR-DISPLAY sy-vline 
WA_RFKI1_STR-XEXTERN sy-vline 
WA_RFKI1_STR-XDIALOG sy-vline 
WA_RFKI1_STR-XDIRECT sy-vline 
WA_RFKI1_STR-XNOREAD sy-vline 
WA_RFKI1_STR-XNOROUND sy-vline 
WA_RFKI1_STR-XNOBOLLO sy-vline 
WA_RFKI1_STR-XDZINS sy-vline 
WA_RFKI1_STR-TCHEADER sy-vline 
WA_RFKI1_STR-XZIRP sy-vline 
WA_RFKI1_STR-XZINE sy-vline 
WA_RFKI1_STR-AUGRSB sy-vline 
WA_RFKI1_STR-XFAEDIP sy-vline 
WA_RFKI1_STR-XVKINTDOC sy-vline 
WA_RFKI1_STR-XMBEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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