ABAP Select data from SAP table RFC_FRC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFC_FRC 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_FRC. 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_FRC 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_FRC TYPE STANDARD TABLE OF RFC_FRC,
      WA_RFC_FRC TYPE RFC_FRC,
      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_FRC> TYPE RFC_FRC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFC_FRC
*  INTO TABLE @DATA(IT_RFC_FRC2).
*--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_FRC INDEX 1 INTO DATA(WA_RFC_FRC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFC_FRC>-BLPOS = 1.
<RFC_FRC>-ERLKZ = 1.
<RFC_FRC>-BLPKZ = 1.
<RFC_FRC>-WTGES = 1.
<RFC_FRC>-FDATK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFC_FRC-FIPEX, sy-vline,
  WA_RFC_FRC-FISTL, sy-vline,
  WA_RFC_FRC-GEBER, sy-vline,
  WA_RFC_FRC-PTEXT, sy-vline,
  WA_RFC_FRC-CONSUMEKZ, sy-vline,
  WA_RFC_FRC-CARRYOV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFC_FRC 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_FRC 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_FRC INTO WA_RFC_FRC.


*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_FRC_STR, 
BLPOS TYPE STRING,
ERLKZ TYPE STRING,
BLPKZ TYPE STRING,
WTGES TYPE STRING,
FDATK TYPE STRING,
FIPEX TYPE STRING,
FISTL TYPE STRING,
GEBER TYPE STRING,
PTEXT TYPE STRING,
CONSUMEKZ TYPE STRING,
CARRYOV TYPE STRING,
SAKNR TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
LNRZA 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_FRC_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_FRC_STR-BLPOS sy-vline 
WA_RFC_FRC_STR-ERLKZ sy-vline 
WA_RFC_FRC_STR-BLPKZ sy-vline 
WA_RFC_FRC_STR-WTGES sy-vline 
WA_RFC_FRC_STR-FDATK sy-vline 
WA_RFC_FRC_STR-FIPEX sy-vline 
WA_RFC_FRC_STR-FISTL sy-vline 
WA_RFC_FRC_STR-GEBER sy-vline 
WA_RFC_FRC_STR-PTEXT sy-vline 
WA_RFC_FRC_STR-CONSUMEKZ sy-vline 
WA_RFC_FRC_STR-CARRYOV sy-vline 
WA_RFC_FRC_STR-SAKNR sy-vline 
WA_RFC_FRC_STR-LIFNR sy-vline 
WA_RFC_FRC_STR-KUNNR sy-vline 
WA_RFC_FRC_STR-LNRZA sy-vline 
WA_RFC_FRC_STR-OLDFIPEX sy-vline 
WA_RFC_FRC_STR-OLDFICTR sy-vline 
WA_RFC_FRC_STR-OLDFONDS sy-vline 
WA_RFC_FRC_STR-COMBLNR sy-vline 
WA_RFC_FRC_STR-COMBLPO sy-vline 
WA_RFC_FRC_STR-ERNPROZ sy-vline 
WA_RFC_FRC_STR-COMFIPEX sy-vline 
WA_RFC_FRC_STR-COMFICTR sy-vline 
WA_RFC_FRC_STR-PAYFIPEX sy-vline 
WA_RFC_FRC_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.