ABAP Select data from SAP table RFC_ROC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFC_ROC
*  INTO TABLE @DATA(IT_RFC_ROC2).
*--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_RFC_ROC INDEX 1 INTO DATA(WA_RFC_ROC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFC_ROC>-XSKZG = 1.
<RFC_ROC>-XHKZG = 1.
<RFC_ROC>-KBLNR_COM = 1.
<RFC_ROC>-KBLPOS_COM = 1.
<RFC_ROC>-ACIND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFC_ROC-FIPEX, sy-vline,
  WA_RFC_ROC-FISTL, sy-vline,
  WA_RFC_ROC-GEBER, sy-vline,
  WA_RFC_ROC-WRBTR, sy-vline,
  WA_RFC_ROC-ERLKZ_COM, sy-vline,
  WA_RFC_ROC-GSBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFC_ROC 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_RFC_ROC 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_RFC_ROC INTO WA_RFC_ROC.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RFC_ROC_STR, 
XSKZG TYPE STRING,
XHKZG TYPE STRING,
KBLNR_COM TYPE STRING,
KBLPOS_COM TYPE STRING,
ACIND TYPE STRING,
FIPEX TYPE STRING,
FISTL TYPE STRING,
GEBER TYPE STRING,
WRBTR TYPE STRING,
ERLKZ_COM TYPE STRING,
GSBER TYPE STRING,
ZUONR TYPE STRING,
SGTXT TYPE STRING,
SAKNR TYPE STRING,
MWSKZ TYPE STRING,
OLDFIPEX TYPE STRING,
OLDFICTR TYPE STRING,
OLDFONDS TYPE STRING,
COMBLNR TYPE STRING,
COMBLPO TYPE STRING,
ERNPROZ TYPE STRING,
COMFIPEX TYPE STRING,
COMFICTR TYPE STRING,
PAYFIPEX TYPE STRING,
PAYFICTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFC_ROC_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_RFC_ROC_STR-XSKZG sy-vline 
WA_RFC_ROC_STR-XHKZG sy-vline 
WA_RFC_ROC_STR-KBLNR_COM sy-vline 
WA_RFC_ROC_STR-KBLPOS_COM sy-vline 
WA_RFC_ROC_STR-ACIND sy-vline 
WA_RFC_ROC_STR-FIPEX sy-vline 
WA_RFC_ROC_STR-FISTL sy-vline 
WA_RFC_ROC_STR-GEBER sy-vline 
WA_RFC_ROC_STR-WRBTR sy-vline 
WA_RFC_ROC_STR-ERLKZ_COM sy-vline 
WA_RFC_ROC_STR-GSBER sy-vline 
WA_RFC_ROC_STR-ZUONR sy-vline 
WA_RFC_ROC_STR-SGTXT sy-vline 
WA_RFC_ROC_STR-SAKNR sy-vline 
WA_RFC_ROC_STR-MWSKZ sy-vline 
WA_RFC_ROC_STR-OLDFIPEX sy-vline 
WA_RFC_ROC_STR-OLDFICTR sy-vline 
WA_RFC_ROC_STR-OLDFONDS sy-vline 
WA_RFC_ROC_STR-COMBLNR sy-vline 
WA_RFC_ROC_STR-COMBLPO sy-vline 
WA_RFC_ROC_STR-ERNPROZ sy-vline 
WA_RFC_ROC_STR-COMFIPEX sy-vline 
WA_RFC_ROC_STR-COMFICTR sy-vline 
WA_RFC_ROC_STR-PAYFIPEX sy-vline 
WA_RFC_ROC_STR-PAYFICTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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