ABAP Select data from SAP table RFKH7 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFKH7 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 RFKH7. 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 RFKH7 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_RFKH7 TYPE STANDARD TABLE OF RFKH7,
      WA_RFKH7 TYPE RFKH7,
      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: <RFKH7> TYPE RFKH7.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFKH7.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFKH7
  INTO TABLE IT_RFKH7.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKH7
*  INTO TABLE @DATA(IT_RFKH72).
*--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_RFKH7 INDEX 1 INTO DATA(WA_RFKH72).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFKH7 ASSIGNING <RFKH7>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKH7>-XMARK = 1.
<RFKH7>-KUKON = 1.
<RFKH7>-BETRW = 1.
<RFKH7>-WAERS = 1.
<RFKH7>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_RFKH7 INTO WA_RFKH7.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKH7-TXTRZ, sy-vline,
  WA_RFKH7-HZUON, sy-vline,
  WA_RFKH7-HKONT, sy-vline,
  WA_RFKH7-GSBER, sy-vline,
  WA_RFKH7-SEGMENT, sy-vline,
  WA_RFKH7-BUPLA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKH7 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_RFKH7 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_RFKH7 INTO WA_RFKH7.


*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 HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKH7-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKH7-HKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKH7-SEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKH7-SEGMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKH7-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKH7-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKH7-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKH7-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RFKH7-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKH7-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKH7-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKH7-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIL, internal->external for field FIPEX
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_RFKH7-FIPEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKH7-FIPEX.
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_RFKH7_STR, 
XMARK TYPE STRING,
KUKON TYPE STRING,
BETRW TYPE STRING,
WAERS TYPE STRING,
BUKRS TYPE STRING,
TXTRZ TYPE STRING,
HZUON TYPE STRING,
HKONT TYPE STRING,
GSBER TYPE STRING,
SEGMENT TYPE STRING,
BUPLA TYPE STRING,
PRCTR TYPE STRING,
KOSTL TYPE STRING,
PS_PSP_PNR TYPE STRING,
PAOBJNR TYPE STRING,
MWSKZ TYPE STRING,
AUFNR TYPE STRING,
XEIPH TYPE STRING,
KONTT TYPE STRING,
KONTL TYPE STRING,
FIPEX TYPE STRING,
FISTL TYPE STRING,
FONDS TYPE STRING,
FKBER TYPE STRING,
MEASURE TYPE STRING,
XAKTP TYPE STRING,
XGLOV TYPE STRING,
COKEY TYPE STRING,
PAYTP TYPE STRING,
TXJCD TYPE STRING,
BUDGET_PD TYPE STRING,
TXDAT TYPE STRING,
TAX_COUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKH7_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_RFKH7_STR-XMARK sy-vline 
WA_RFKH7_STR-KUKON sy-vline 
WA_RFKH7_STR-BETRW sy-vline 
WA_RFKH7_STR-WAERS sy-vline 
WA_RFKH7_STR-BUKRS sy-vline 
WA_RFKH7_STR-TXTRZ sy-vline 
WA_RFKH7_STR-HZUON sy-vline 
WA_RFKH7_STR-HKONT sy-vline 
WA_RFKH7_STR-GSBER sy-vline 
WA_RFKH7_STR-SEGMENT sy-vline 
WA_RFKH7_STR-BUPLA sy-vline 
WA_RFKH7_STR-PRCTR sy-vline 
WA_RFKH7_STR-KOSTL sy-vline 
WA_RFKH7_STR-PS_PSP_PNR sy-vline 
WA_RFKH7_STR-PAOBJNR sy-vline 
WA_RFKH7_STR-MWSKZ sy-vline 
WA_RFKH7_STR-AUFNR sy-vline 
WA_RFKH7_STR-XEIPH sy-vline 
WA_RFKH7_STR-KONTT sy-vline 
WA_RFKH7_STR-KONTL sy-vline 
WA_RFKH7_STR-FIPEX sy-vline 
WA_RFKH7_STR-FISTL sy-vline 
WA_RFKH7_STR-FONDS sy-vline 
WA_RFKH7_STR-FKBER sy-vline 
WA_RFKH7_STR-MEASURE sy-vline 
WA_RFKH7_STR-XAKTP sy-vline 
WA_RFKH7_STR-XGLOV sy-vline 
WA_RFKH7_STR-COKEY sy-vline 
WA_RFKH7_STR-PAYTP sy-vline 
WA_RFKH7_STR-TXJCD sy-vline 
WA_RFKH7_STR-BUDGET_PD sy-vline 
WA_RFKH7_STR-TXDAT sy-vline 
WA_RFKH7_STR-TAX_COUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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