ABAP Select data from SAP table RPCXXXNZ into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCXXXNZ 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 RPCXXXNZ. 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 RPCXXXNZ 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_RPCXXXNZ TYPE STANDARD TABLE OF RPCXXXNZ,
      WA_RPCXXXNZ TYPE RPCXXXNZ,
      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: <RPCXXXNZ> TYPE RPCXXXNZ.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCXXXNZ
*  INTO TABLE @DATA(IT_RPCXXXNZ2).
*--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_RPCXXXNZ INDEX 1 INTO DATA(WA_RPCXXXNZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCXXXNZ>-FINYR = 1.
<RPCXXXNZ>-DOSFI = 1.
<RPCXXXNZ>-UNXFI = 1.
<RPCXXXNZ>-UNXFN = 1.
<RPCXXXNZ>-RUNTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCXXXNZ-TESTC, sy-vline,
  WA_RPCXXXNZ-DPPRN, sy-vline,
  WA_RPCXXXNZ-LPPRN, sy-vline,
  WA_RPCXXXNZ-VIEWC, sy-vline,
  WA_RPCXXXNZ-PRNCR, sy-vline,
  WA_RPCXXXNZ-CRPRN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCXXXNZ 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_RPCXXXNZ 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_RPCXXXNZ INTO WA_RPCXXXNZ.


*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 FINYR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RPCXXXNZ-FINYR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RPCXXXNZ-FINYR.
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_RPCXXXNZ_STR, 
FINYR TYPE STRING,
DOSFI TYPE STRING,
UNXFI TYPE STRING,
UNXFN TYPE STRING,
RUNTY TYPE STRING,
TESTC TYPE STRING,
DPPRN TYPE STRING,
LPPRN TYPE STRING,
VIEWC TYPE STRING,
PRNCR TYPE STRING,
CRPRN TYPE STRING,
ALPRN TYPE STRING,
PMTHD TYPE STRING,
TMODE TYPE STRING,
PRNIR TYPE STRING,
LVENT TYPE STRING,
LVACC TYPE STRING,
COMIT TYPE STRING,
SUPRS TYPE STRING,
ACCRU TYPE STRING,
TOTAL TYPE STRING,
DEACR TYPE STRING,
PROJD TYPE STRING,
AVRHR TYPE STRING,
DONA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCXXXNZ_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_RPCXXXNZ_STR-FINYR sy-vline 
WA_RPCXXXNZ_STR-DOSFI sy-vline 
WA_RPCXXXNZ_STR-UNXFI sy-vline 
WA_RPCXXXNZ_STR-UNXFN sy-vline 
WA_RPCXXXNZ_STR-RUNTY sy-vline 
WA_RPCXXXNZ_STR-TESTC sy-vline 
WA_RPCXXXNZ_STR-DPPRN sy-vline 
WA_RPCXXXNZ_STR-LPPRN sy-vline 
WA_RPCXXXNZ_STR-VIEWC sy-vline 
WA_RPCXXXNZ_STR-PRNCR sy-vline 
WA_RPCXXXNZ_STR-CRPRN sy-vline 
WA_RPCXXXNZ_STR-ALPRN sy-vline 
WA_RPCXXXNZ_STR-PMTHD sy-vline 
WA_RPCXXXNZ_STR-TMODE sy-vline 
WA_RPCXXXNZ_STR-PRNIR sy-vline 
WA_RPCXXXNZ_STR-LVENT sy-vline 
WA_RPCXXXNZ_STR-LVACC sy-vline 
WA_RPCXXXNZ_STR-COMIT sy-vline 
WA_RPCXXXNZ_STR-SUPRS sy-vline 
WA_RPCXXXNZ_STR-ACCRU sy-vline 
WA_RPCXXXNZ_STR-TOTAL sy-vline 
WA_RPCXXXNZ_STR-DEACR sy-vline 
WA_RPCXXXNZ_STR-PROJD sy-vline 
WA_RPCXXXNZ_STR-AVRHR sy-vline 
WA_RPCXXXNZ_STR-DONA sy-vline      INTO ld_text SEPARATED BY SPACE.

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