ABAP Select data from SAP table RFKKEXC_PS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKKEXC_PS
*  INTO TABLE @DATA(IT_RFKKEXC_PS2).
*--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_RFKKEXC_PS INDEX 1 INTO DATA(WA_RFKKEXC_PS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKKEXC_PS>-MANDT = 1.
<RFKKEXC_PS>-OFFIC = 1.
<RFKKEXC_PS>-CHDSK = 1.
<RFKKEXC_PS>-PAYID = 1.
<RFKKEXC_PS>-PAYTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKKEXC_PS-PAYKY, sy-vline,
  WA_RFKKEXC_PS-PRZTP, sy-vline,
  WA_RFKKEXC_PS-GPART, sy-vline,
  WA_RFKKEXC_PS-BPEXT, sy-vline,
  WA_RFKKEXC_PS-VKONT, sy-vline,
  WA_RFKKEXC_PS-VKONA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKKEXC_PS 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_RFKKEXC_PS 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_RFKKEXC_PS INTO WA_RFKKEXC_PS.


*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_RFKKEXC_PS-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKKEXC_PS-GPART.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field STORB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKKEXC_PS-STORB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKKEXC_PS-STORB.
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_RFKKEXC_PS_STR, 
MANDT TYPE STRING,
OFFIC TYPE STRING,
CHDSK TYPE STRING,
PAYID TYPE STRING,
PAYTP TYPE STRING,
PAYKY TYPE STRING,
PRZTP TYPE STRING,
GPART TYPE STRING,
BPEXT TYPE STRING,
VKONT TYPE STRING,
VKONA TYPE STRING,
BETRZ TYPE STRING,
WAERS TYPE STRING,
VALUT TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
UZEIT TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
SEGMENT TYPE STRING,
CDVKO TYPE STRING,
XAKON TYPE STRING,
STEXC TYPE STRING,
OPBEL TYPE STRING,
KEYZ1 TYPE STRING,
POSZA TYPE STRING,
STAAG TYPE STRING,
ERNAM TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
STORB TYPE STRING,
STDAT TYPE STRING,
STLOT TYPE STRING,
XIGUID TYPE STRING,
STGUID TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
HOST TYPE STRING,
UPDSC TYPE STRING,
ERRTX TYPE STRING,
ICON_ID TYPE STRING,
OFTXT TYPE STRING,
CHTXT TYPE STRING,
OFFIC_EX TYPE STRING,
CHDSK_EX TYPE STRING,
OFTXT_EX TYPE STRING,
CHTXT_EX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKKEXC_PS_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_RFKKEXC_PS_STR-MANDT sy-vline 
WA_RFKKEXC_PS_STR-OFFIC sy-vline 
WA_RFKKEXC_PS_STR-CHDSK sy-vline 
WA_RFKKEXC_PS_STR-PAYID sy-vline 
WA_RFKKEXC_PS_STR-PAYTP sy-vline 
WA_RFKKEXC_PS_STR-PAYKY sy-vline 
WA_RFKKEXC_PS_STR-PRZTP sy-vline 
WA_RFKKEXC_PS_STR-GPART sy-vline 
WA_RFKKEXC_PS_STR-BPEXT sy-vline 
WA_RFKKEXC_PS_STR-VKONT sy-vline 
WA_RFKKEXC_PS_STR-VKONA sy-vline 
WA_RFKKEXC_PS_STR-BETRZ sy-vline 
WA_RFKKEXC_PS_STR-WAERS sy-vline 
WA_RFKKEXC_PS_STR-VALUT sy-vline 
WA_RFKKEXC_PS_STR-BLDAT sy-vline 
WA_RFKKEXC_PS_STR-BUDAT sy-vline 
WA_RFKKEXC_PS_STR-UZEIT sy-vline 
WA_RFKKEXC_PS_STR-BUKRS sy-vline 
WA_RFKKEXC_PS_STR-GSBER sy-vline 
WA_RFKKEXC_PS_STR-SEGMENT sy-vline 
WA_RFKKEXC_PS_STR-CDVKO sy-vline 
WA_RFKKEXC_PS_STR-XAKON sy-vline 
WA_RFKKEXC_PS_STR-STEXC sy-vline 
WA_RFKKEXC_PS_STR-OPBEL sy-vline 
WA_RFKKEXC_PS_STR-KEYZ1 sy-vline 
WA_RFKKEXC_PS_STR-POSZA sy-vline 
WA_RFKKEXC_PS_STR-STAAG sy-vline 
WA_RFKKEXC_PS_STR-ERNAM sy-vline 
WA_RFKKEXC_PS_STR-CPUDT sy-vline 
WA_RFKKEXC_PS_STR-CPUTM sy-vline 
WA_RFKKEXC_PS_STR-STORB sy-vline 
WA_RFKKEXC_PS_STR-STDAT sy-vline 
WA_RFKKEXC_PS_STR-STLOT sy-vline 
WA_RFKKEXC_PS_STR-XIGUID sy-vline 
WA_RFKKEXC_PS_STR-STGUID sy-vline 
WA_RFKKEXC_PS_STR-MSGID sy-vline 
WA_RFKKEXC_PS_STR-MSGNO sy-vline 
WA_RFKKEXC_PS_STR-MSGV1 sy-vline 
WA_RFKKEXC_PS_STR-MSGV2 sy-vline 
WA_RFKKEXC_PS_STR-MSGV3 sy-vline 
WA_RFKKEXC_PS_STR-MSGV4 sy-vline 
WA_RFKKEXC_PS_STR-HOST sy-vline 
WA_RFKKEXC_PS_STR-UPDSC sy-vline 
WA_RFKKEXC_PS_STR-ERRTX sy-vline 
WA_RFKKEXC_PS_STR-ICON_ID sy-vline 
WA_RFKKEXC_PS_STR-OFTXT sy-vline 
WA_RFKKEXC_PS_STR-CHTXT sy-vline 
WA_RFKKEXC_PS_STR-OFFIC_EX sy-vline 
WA_RFKKEXC_PS_STR-CHDSK_EX sy-vline 
WA_RFKKEXC_PS_STR-OFTXT_EX sy-vline 
WA_RFKKEXC_PS_STR-CHTXT_EX sy-vline      INTO ld_text SEPARATED BY SPACE.

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