ABAP Select data from SAP table RPCXXXHK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCXXXHK
*  INTO TABLE @DATA(IT_RPCXXXHK2).
*--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_RPCXXXHK INDEX 1 INTO DATA(WA_RPCXXXHK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCXXXHK>-FRMPN = 1.
<RPCXXXHK>-ENDYR = 1.
<RPCXXXHK>-DESGN = 1.
<RPCXXXHK>-VIEWF = 1.
<RPCXXXHK>-TESTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCXXXHK-IMDPN, sy-vline,
  WA_RPCXXXHK-ALTRG, sy-vline,
  WA_RPCXXXHK-SPTRG, sy-vline,
  WA_RPCXXXHK-REPRN, sy-vline,
  WA_RPCXXXHK-CNTCT, sy-vline,
  WA_RPCXXXHK-FORME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCXXXHK 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_RPCXXXHK 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_RPCXXXHK INTO WA_RPCXXXHK.


*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 GJAHR, internal->external for field ENDYR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RPCXXXHK-ENDYR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCXXXHK-ENDYR.
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_RPCXXXHK_STR, 
FRMPN TYPE STRING,
ENDYR TYPE STRING,
DESGN TYPE STRING,
VIEWF TYPE STRING,
TESTP TYPE STRING,
IMDPN TYPE STRING,
ALTRG TYPE STRING,
SPTRG TYPE STRING,
REPRN TYPE STRING,
CNTCT TYPE STRING,
FORME TYPE STRING,
CKXML TYPE STRING,
LFILE TYPE STRING,
DGTSN TYPE STRING,
PRTAL TYPE STRING,
DSPDF TYPE STRING,
WTHDR TYPE STRING,
SIGNE TYPE STRING,
DIXML TYPE STRING,
PREFM TYPE STRING,
PRTSP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCXXXHK_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_RPCXXXHK_STR-FRMPN sy-vline 
WA_RPCXXXHK_STR-ENDYR sy-vline 
WA_RPCXXXHK_STR-DESGN sy-vline 
WA_RPCXXXHK_STR-VIEWF sy-vline 
WA_RPCXXXHK_STR-TESTP sy-vline 
WA_RPCXXXHK_STR-IMDPN sy-vline 
WA_RPCXXXHK_STR-ALTRG sy-vline 
WA_RPCXXXHK_STR-SPTRG sy-vline 
WA_RPCXXXHK_STR-REPRN sy-vline 
WA_RPCXXXHK_STR-CNTCT sy-vline 
WA_RPCXXXHK_STR-FORME sy-vline 
WA_RPCXXXHK_STR-CKXML sy-vline 
WA_RPCXXXHK_STR-LFILE sy-vline 
WA_RPCXXXHK_STR-DGTSN sy-vline 
WA_RPCXXXHK_STR-PRTAL sy-vline 
WA_RPCXXXHK_STR-DSPDF sy-vline 
WA_RPCXXXHK_STR-WTHDR sy-vline 
WA_RPCXXXHK_STR-SIGNE sy-vline 
WA_RPCXXXHK_STR-DIXML sy-vline 
WA_RPCXXXHK_STR-PREFM sy-vline 
WA_RPCXXXHK_STR-PRTSP sy-vline      INTO ld_text SEPARATED BY SPACE.

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