ABAP Select data from SAP table RF82T into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RF82T 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 RF82T. 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 RF82T 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_RF82T TYPE STANDARD TABLE OF RF82T,
      WA_RF82T TYPE RF82T,
      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: <RF82T> TYPE RF82T.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RF82T.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RF82T
  INTO TABLE IT_RF82T.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RF82T
*  INTO TABLE @DATA(IT_RF82T2).
*--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_RF82T INDEX 1 INTO DATA(WA_RF82T2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RF82T ASSIGNING <RF82T>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RF82T>-MANDT = 1.
<RF82T>-AKTIV = 1.
<RF82T>-LAND1 = 1.
<RF82T>-TEXT1 = 1.
<RF82T>-TXJCD = 1.

ENDLOOP.

LOOP AT IT_RF82T INTO WA_RF82T.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RF82T-DATAB, sy-vline,
  WA_RF82T-DATBI, sy-vline,
  WA_RF82T-KBETR, sy-vline,
  WA_RF82T-DATAM, sy-vline,
  WA_RF82T-VTEXT, sy-vline,
  WA_RF82T-MWSKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RF82T 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_RF82T 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_RF82T INTO WA_RF82T.


*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_RF82T_STR, 
MANDT TYPE STRING,
AKTIV TYPE STRING,
LAND1 TYPE STRING,
TEXT1 TYPE STRING,
TXJCD TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
KBETR TYPE STRING,
DATAM TYPE STRING,
VTEXT TYPE STRING,
MWSKZ TYPE STRING,
KSCHL TYPE STRING,
OSS_CLASSIFICATION_DDTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RF82T_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_RF82T_STR-MANDT sy-vline 
WA_RF82T_STR-AKTIV sy-vline 
WA_RF82T_STR-LAND1 sy-vline 
WA_RF82T_STR-TEXT1 sy-vline 
WA_RF82T_STR-TXJCD sy-vline 
WA_RF82T_STR-DATAB sy-vline 
WA_RF82T_STR-DATBI sy-vline 
WA_RF82T_STR-KBETR sy-vline 
WA_RF82T_STR-DATAM sy-vline 
WA_RF82T_STR-VTEXT sy-vline 
WA_RF82T_STR-MWSKZ sy-vline 
WA_RF82T_STR-KSCHL sy-vline 
WA_RF82T_STR-OSS_CLASSIFICATION_DDTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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