ABAP Select data from SAP table RFC_REA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFC_REA 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_REA. 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_REA 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_REA TYPE STANDARD TABLE OF RFC_REA,
      WA_RFC_REA TYPE RFC_REA,
      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_REA> TYPE RFC_REA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFC_REA
*  INTO TABLE @DATA(IT_RFC_REA2).
*--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_REA INDEX 1 INTO DATA(WA_RFC_REA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFC_REA>-BLART = 1.
<RFC_REA>-BUDAT = 1.
<RFC_REA>-BLDAT = 1.
<RFC_REA>-BUKRS = 1.
<RFC_REA>-WAERS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFC_REA-WWERT, sy-vline,
  WA_RFC_REA-KURSF, sy-vline,
  WA_RFC_REA-KTEXT, sy-vline,
  WA_RFC_REA-LOTKZ, sy-vline,
  WA_RFC_REA-ATEXT1, sy-vline,
  WA_RFC_REA-LOCSYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFC_REA 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_REA 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_REA INTO WA_RFC_REA.


*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_REA_STR, 
BLART TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
BUKRS TYPE STRING,
WAERS TYPE STRING,
WWERT TYPE STRING,
KURSF TYPE STRING,
KTEXT TYPE STRING,
LOTKZ TYPE STRING,
ATEXT1 TYPE STRING,
LOCSYS TYPE STRING,
PERSCH TYPE STRING,
SPECLOC TYPE STRING,
PERSARC TYPE STRING,
REFAO TYPE STRING,
GROUPNR TYPE STRING,
SI2WFID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFC_REA_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_REA_STR-BLART sy-vline 
WA_RFC_REA_STR-BUDAT sy-vline 
WA_RFC_REA_STR-BLDAT sy-vline 
WA_RFC_REA_STR-BUKRS sy-vline 
WA_RFC_REA_STR-WAERS sy-vline 
WA_RFC_REA_STR-WWERT sy-vline 
WA_RFC_REA_STR-KURSF sy-vline 
WA_RFC_REA_STR-KTEXT sy-vline 
WA_RFC_REA_STR-LOTKZ sy-vline 
WA_RFC_REA_STR-ATEXT1 sy-vline 
WA_RFC_REA_STR-LOCSYS sy-vline 
WA_RFC_REA_STR-PERSCH sy-vline 
WA_RFC_REA_STR-SPECLOC sy-vline 
WA_RFC_REA_STR-PERSARC sy-vline 
WA_RFC_REA_STR-REFAO sy-vline 
WA_RFC_REA_STR-GROUPNR sy-vline 
WA_RFC_REA_STR-SI2WFID sy-vline      INTO ld_text SEPARATED BY SPACE.

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