ABAP Select data from SAP table RFKDOCCHK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKDOCCHK
*  INTO TABLE @DATA(IT_RFKDOCCHK2).
*--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_RFKDOCCHK INDEX 1 INTO DATA(WA_RFKDOCCHK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKDOCCHK>-OPBEL = 1.
<RFKDOCCHK>-FIKEY = 1.
<RFKDOCCHK>-CHKGR = 1.
<RFKDOCCHK>-STORE = 1.
<RFKDOCCHK>-DBUG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKDOCCHK-LSTDPLY, sy-vline,
  WA_RFKDOCCHK-ERRID, sy-vline,
  WA_RFKDOCCHK-ERSTA, sy-vline,
  WA_RFKDOCCHK-GPART, sy-vline,
  WA_RFKDOCCHK-VKONT, sy-vline,
  WA_RFKDOCCHK-HERKF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKDOCCHK 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_RFKDOCCHK 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_RFKDOCCHK INTO WA_RFKDOCCHK.


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

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

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKDOCCHK-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKDOCCHK-VKONT.
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_RFKDOCCHK_STR, 
OPBEL TYPE STRING,
FIKEY TYPE STRING,
CHKGR TYPE STRING,
STORE TYPE STRING,
DBUG TYPE STRING,
LSTDPLY TYPE STRING,
ERRID TYPE STRING,
ERSTA TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
HERKF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKDOCCHK_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_RFKDOCCHK_STR-OPBEL sy-vline 
WA_RFKDOCCHK_STR-FIKEY sy-vline 
WA_RFKDOCCHK_STR-CHKGR sy-vline 
WA_RFKDOCCHK_STR-STORE sy-vline 
WA_RFKDOCCHK_STR-DBUG sy-vline 
WA_RFKDOCCHK_STR-LSTDPLY sy-vline 
WA_RFKDOCCHK_STR-ERRID sy-vline 
WA_RFKDOCCHK_STR-ERSTA sy-vline 
WA_RFKDOCCHK_STR-GPART sy-vline 
WA_RFKDOCCHK_STR-VKONT sy-vline 
WA_RFKDOCCHK_STR-HERKF sy-vline      INTO ld_text SEPARATED BY SPACE.

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