ABAP Select data from SAP table RCTAV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCTAV
*  INTO TABLE @DATA(IT_RCTAV2).
*--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_RCTAV INDEX 1 INTO DATA(WA_RCTAV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCTAV>-MANDT = 1.
<RCTAV>-BASIS = 1.
<RCTAV>-OBERF = 1.
<RCTAV>-ZUSTZ = 1.
<RCTAV>-WERTE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCTAV-ATNAM, sy-vline,
  WA_RCTAV-BLUB1, sy-vline,
  WA_RCTAV-SPRBE, sy-vline,
  WA_RCTAV-ATVWE, sy-vline,
  WA_RCTAV-ATKLS, sy-vline,
  WA_RCTAV-ATVWK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCTAV 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_RCTAV 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_RCTAV INTO WA_RCTAV.


*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 AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCTAV-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCTAV-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REF_AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCTAV-REF_AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCTAV-REF_AENNR.
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_RCTAV_STR, 
MANDT TYPE STRING,
BASIS TYPE STRING,
OBERF TYPE STRING,
ZUSTZ TYPE STRING,
WERTE TYPE STRING,
ATNAM TYPE STRING,
BLUB1 TYPE STRING,
SPRBE TYPE STRING,
ATVWE TYPE STRING,
ATKLS TYPE STRING,
ATVWK TYPE STRING,
ATVWV TYPE STRING,
ATVWP TYPE STRING,
DATUV TYPE STRING,
ATRDA TYPE STRING,
ATVWB TYPE STRING,
ATVWC TYPE STRING,
ATVWO TYPE STRING,
ATSUBVAL TYPE STRING,
AENNR TYPE STRING,
REF_ATNAM TYPE STRING,
REF_AENNR TYPE STRING,
REF_DATUV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCTAV_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_RCTAV_STR-MANDT sy-vline 
WA_RCTAV_STR-BASIS sy-vline 
WA_RCTAV_STR-OBERF sy-vline 
WA_RCTAV_STR-ZUSTZ sy-vline 
WA_RCTAV_STR-WERTE sy-vline 
WA_RCTAV_STR-ATNAM sy-vline 
WA_RCTAV_STR-BLUB1 sy-vline 
WA_RCTAV_STR-SPRBE sy-vline 
WA_RCTAV_STR-ATVWE sy-vline 
WA_RCTAV_STR-ATKLS sy-vline 
WA_RCTAV_STR-ATVWK sy-vline 
WA_RCTAV_STR-ATVWV sy-vline 
WA_RCTAV_STR-ATVWP sy-vline 
WA_RCTAV_STR-DATUV sy-vline 
WA_RCTAV_STR-ATRDA sy-vline 
WA_RCTAV_STR-ATVWB sy-vline 
WA_RCTAV_STR-ATVWC sy-vline 
WA_RCTAV_STR-ATVWO sy-vline 
WA_RCTAV_STR-ATSUBVAL sy-vline 
WA_RCTAV_STR-AENNR sy-vline 
WA_RCTAV_STR-REF_ATNAM sy-vline 
WA_RCTAV_STR-REF_AENNR sy-vline 
WA_RCTAV_STR-REF_DATUV sy-vline      INTO ld_text SEPARATED BY SPACE.

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