ABAP Select data from SAP table RLFF02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RLFF02 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 RLFF02. 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 RLFF02 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_RLFF02 TYPE STANDARD TABLE OF RLFF02,
      WA_RLFF02 TYPE RLFF02,
      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: <RLFF02> TYPE RLFF02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RLFF02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RLFF02
  INTO TABLE IT_RLFF02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLFF02
*  INTO TABLE @DATA(IT_RLFF022).
*--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_RLFF02 INDEX 1 INTO DATA(WA_RLFF022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RLFF02 ASSIGNING <RLFF02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLFF02>-JAUSWT1 = 1.
<RLFF02>-JAUSWT2 = 1.
<RLFF02>-JAUSWT3 = 1.
<RLFF02>-JAUSWB1 = 1.
<RLFF02>-JAUSWB2 = 1.

ENDLOOP.

LOOP AT IT_RLFF02 INTO WA_RLFF02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLFF02-JAUSWB3, sy-vline,
  WA_RLFF02-SINCLVON, sy-vline,
  WA_RLFF02-SINCLBIS, sy-vline,
  WA_RLFF02-SULTVON, sy-vline,
  WA_RLFF02-SULTBIS, sy-vline,
  WA_RLFF02-YPKOND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLFF02 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_RLFF02 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_RLFF02 INTO WA_RLFF02.


*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_RLFF02_STR, 
JAUSWT1 TYPE STRING,
JAUSWT2 TYPE STRING,
JAUSWT3 TYPE STRING,
JAUSWB1 TYPE STRING,
JAUSWB2 TYPE STRING,
JAUSWB3 TYPE STRING,
SINCLVON TYPE STRING,
SINCLBIS TYPE STRING,
SULTVON TYPE STRING,
SULTBIS TYPE STRING,
YPKOND TYPE STRING,
YZBMETH TYPE STRING,
YTGMETH TYPE STRING,
XKALIDWT TYPE STRING,
JPROZR TYPE STRING,
JZINSRL TYPE STRING,
JZINSRE TYPE STRING,
XBASIS TYPE STRING,
ENTRACT TYPE STRING,
ENTRSUM TYPE STRING,
XEXCLVON TYPE STRING,
XULTVON TYPE STRING,
XINCLBIS TYPE STRING,
XULTBIS TYPE STRING,
XCUR1 TYPE STRING,
XCUR2 TYPE STRING,
XCUR3 TYPE STRING,
XEXPOZINS TYPE STRING,
XROUND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLFF02_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_RLFF02_STR-JAUSWT1 sy-vline 
WA_RLFF02_STR-JAUSWT2 sy-vline 
WA_RLFF02_STR-JAUSWT3 sy-vline 
WA_RLFF02_STR-JAUSWB1 sy-vline 
WA_RLFF02_STR-JAUSWB2 sy-vline 
WA_RLFF02_STR-JAUSWB3 sy-vline 
WA_RLFF02_STR-SINCLVON sy-vline 
WA_RLFF02_STR-SINCLBIS sy-vline 
WA_RLFF02_STR-SULTVON sy-vline 
WA_RLFF02_STR-SULTBIS sy-vline 
WA_RLFF02_STR-YPKOND sy-vline 
WA_RLFF02_STR-YZBMETH sy-vline 
WA_RLFF02_STR-YTGMETH sy-vline 
WA_RLFF02_STR-XKALIDWT sy-vline 
WA_RLFF02_STR-JPROZR sy-vline 
WA_RLFF02_STR-JZINSRL sy-vline 
WA_RLFF02_STR-JZINSRE sy-vline 
WA_RLFF02_STR-XBASIS sy-vline 
WA_RLFF02_STR-ENTRACT sy-vline 
WA_RLFF02_STR-ENTRSUM sy-vline 
WA_RLFF02_STR-XEXCLVON sy-vline 
WA_RLFF02_STR-XULTVON sy-vline 
WA_RLFF02_STR-XINCLBIS sy-vline 
WA_RLFF02_STR-XULTBIS sy-vline 
WA_RLFF02_STR-XCUR1 sy-vline 
WA_RLFF02_STR-XCUR2 sy-vline 
WA_RLFF02_STR-XCUR3 sy-vline 
WA_RLFF02_STR-XEXPOZINS sy-vline 
WA_RLFF02_STR-XROUND sy-vline      INTO ld_text SEPARATED BY SPACE.

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