ABAP Select data from SAP table RF40T into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RF40T 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 RF40T. 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 RF40T 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_RF40T TYPE STANDARD TABLE OF RF40T,
      WA_RF40T TYPE RF40T,
      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: <RF40T> TYPE RF40T.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RF40T.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RF40T
  INTO TABLE IT_RF40T.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RF40T
*  INTO TABLE @DATA(IT_RF40T2).
*--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_RF40T INDEX 1 INTO DATA(WA_RF40T2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RF40T ASSIGNING <RF40T>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RF40T>-MANDT = 1.
<RF40T>-PERDT = 1.
<RF40T>-INTTA = 1.
<RF40T>-INTWO = 1.
<RF40T>-INTMO = 1.

ENDLOOP.

LOOP AT IT_RF40T INTO WA_RF40T.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RF40T-VARTA, sy-vline,
  WA_RF40T-VARWO, sy-vline,
  WA_RF40T-VARMO, sy-vline,
  WA_RF40T-AZART, sy-vline,
  WA_RF40T-SKALV, sy-vline,
  WA_RF40T-SKALN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RF40T 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_RF40T 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_RF40T INTO WA_RF40T.


*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.

*Conversion exit ALPHA, internal->external for field SEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF40T-SEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF40T-SEGMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF40T-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF40T-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF40T-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF40T-GRANT_NBR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_RF40T_STR, 
MANDT TYPE STRING,
PERDT TYPE STRING,
INTTA TYPE STRING,
INTWO TYPE STRING,
INTMO TYPE STRING,
VARTA TYPE STRING,
VARWO TYPE STRING,
VARMO TYPE STRING,
AZART TYPE STRING,
SKALV TYPE STRING,
SKALN TYPE STRING,
GLIED TYPE STRING,
ZEILT TYPE STRING,
SELEK TYPE STRING,
ANZKU TYPE STRING,
ANZDE TYPE STRING,
ANZAU TYPE STRING,
ANZVE TYPE STRING,
ANZES TYPE STRING,
RHYTA TYPE STRING,
RHYWO TYPE STRING,
RHYMO TYPE STRING,
KOPBK TYPE STRING,
KOPBW TYPE STRING,
ZAHLL TYPE STRING,
SPB_S TYPE STRING,
SPB_M TYPE STRING,
SPB_B TYPE STRING,
KOPZS TYPE STRING,
NO_COL TYPE STRING,
STEP_UNIT TYPE STRING,
STEP_RHYTHM TYPE STRING,
SEGMENT TYPE STRING,
PRCTR TYPE STRING,
GEBER TYPE STRING,
GRANT_NBR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RF40T_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_RF40T_STR-MANDT sy-vline 
WA_RF40T_STR-PERDT sy-vline 
WA_RF40T_STR-INTTA sy-vline 
WA_RF40T_STR-INTWO sy-vline 
WA_RF40T_STR-INTMO sy-vline 
WA_RF40T_STR-VARTA sy-vline 
WA_RF40T_STR-VARWO sy-vline 
WA_RF40T_STR-VARMO sy-vline 
WA_RF40T_STR-AZART sy-vline 
WA_RF40T_STR-SKALV sy-vline 
WA_RF40T_STR-SKALN sy-vline 
WA_RF40T_STR-GLIED sy-vline 
WA_RF40T_STR-ZEILT sy-vline 
WA_RF40T_STR-SELEK sy-vline 
WA_RF40T_STR-ANZKU sy-vline 
WA_RF40T_STR-ANZDE sy-vline 
WA_RF40T_STR-ANZAU sy-vline 
WA_RF40T_STR-ANZVE sy-vline 
WA_RF40T_STR-ANZES sy-vline 
WA_RF40T_STR-RHYTA sy-vline 
WA_RF40T_STR-RHYWO sy-vline 
WA_RF40T_STR-RHYMO sy-vline 
WA_RF40T_STR-KOPBK sy-vline 
WA_RF40T_STR-KOPBW sy-vline 
WA_RF40T_STR-ZAHLL sy-vline 
WA_RF40T_STR-SPB_S sy-vline 
WA_RF40T_STR-SPB_M sy-vline 
WA_RF40T_STR-SPB_B sy-vline 
WA_RF40T_STR-KOPZS sy-vline 
WA_RF40T_STR-NO_COL sy-vline 
WA_RF40T_STR-STEP_UNIT sy-vline 
WA_RF40T_STR-STEP_RHYTHM sy-vline 
WA_RF40T_STR-SEGMENT sy-vline 
WA_RF40T_STR-PRCTR sy-vline 
WA_RF40T_STR-GEBER sy-vline 
WA_RF40T_STR-GRANT_NBR sy-vline      INTO ld_text SEPARATED BY SPACE.

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