ABAP Select data from SAP table RF01A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RF01A 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 RF01A. 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 RF01A 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_RF01A TYPE STANDARD TABLE OF RF01A,
      WA_RF01A TYPE RF01A,
      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: <RF01A> TYPE RF01A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RF01A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RF01A
  INTO TABLE IT_RF01A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RF01A
*  INTO TABLE @DATA(IT_RF01A2).
*--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_RF01A INDEX 1 INTO DATA(WA_RF01A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RF01A ASSIGNING <RF01A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RF01A>-BANKL = 1.
<RF01A>-BANKS = 1.
<RF01A>-BELNR = 1.
<RF01A>-BUKRS = 1.
<RF01A>-DATUM = 1.

ENDLOOP.

LOOP AT IT_RF01A INTO WA_RF01A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RF01A-EKORG, sy-vline,
  WA_RF01A-GJAHR, sy-vline,
  WA_RF01A-KKBER, sy-vline,
  WA_RF01A-KTOPL, sy-vline,
  WA_RF01A-KUNNR, sy-vline,
  WA_RF01A-LIFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RF01A 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_RF01A 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_RF01A INTO WA_RF01A.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF01A-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF01A-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RF01A-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF01A-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF01A-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF01A-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF01A-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF01A-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF01A-SAKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF01A-SAKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF01A-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF01A-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_RF01A-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF01A-PARVW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RF01A-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF01A-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RF01A-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RF01A-ADRNR.
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_RF01A_STR, 
BANKL TYPE STRING,
BANKS TYPE STRING,
BELNR TYPE STRING,
BUKRS TYPE STRING,
DATUM TYPE STRING,
EKORG TYPE STRING,
GJAHR TYPE STRING,
KKBER TYPE STRING,
KTOPL TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
MABER TYPE STRING,
SAKNR TYPE STRING,
SPART TYPE STRING,
USNAM TYPE STRING,
UTIME TYPE STRING,
VKONT TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SDBKR TYPE STRING,
ESBKR TYPE STRING,
LTSNR TYPE STRING,
WERKS TYPE STRING,
PARVW TYPE STRING,
PARZA TYPE STRING,
SPRAS TYPE STRING,
LAND1 TYPE STRING,
LFREG TYPE STRING,
BANKN TYPE STRING,
XKRIT TYPE STRING,
XNURB TYPE STRING,
ADRNR TYPE STRING,
XALMB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RF01A_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_RF01A_STR-BANKL sy-vline 
WA_RF01A_STR-BANKS sy-vline 
WA_RF01A_STR-BELNR sy-vline 
WA_RF01A_STR-BUKRS sy-vline 
WA_RF01A_STR-DATUM sy-vline 
WA_RF01A_STR-EKORG sy-vline 
WA_RF01A_STR-GJAHR sy-vline 
WA_RF01A_STR-KKBER sy-vline 
WA_RF01A_STR-KTOPL sy-vline 
WA_RF01A_STR-KUNNR sy-vline 
WA_RF01A_STR-LIFNR sy-vline 
WA_RF01A_STR-MABER sy-vline 
WA_RF01A_STR-SAKNR sy-vline 
WA_RF01A_STR-SPART sy-vline 
WA_RF01A_STR-USNAM sy-vline 
WA_RF01A_STR-UTIME sy-vline 
WA_RF01A_STR-VKONT sy-vline 
WA_RF01A_STR-VKORG sy-vline 
WA_RF01A_STR-VTWEG sy-vline 
WA_RF01A_STR-SDBKR sy-vline 
WA_RF01A_STR-ESBKR sy-vline 
WA_RF01A_STR-LTSNR sy-vline 
WA_RF01A_STR-WERKS sy-vline 
WA_RF01A_STR-PARVW sy-vline 
WA_RF01A_STR-PARZA sy-vline 
WA_RF01A_STR-SPRAS sy-vline 
WA_RF01A_STR-LAND1 sy-vline 
WA_RF01A_STR-LFREG sy-vline 
WA_RF01A_STR-BANKN sy-vline 
WA_RF01A_STR-XKRIT sy-vline 
WA_RF01A_STR-XNURB sy-vline 
WA_RF01A_STR-ADRNR sy-vline 
WA_RF01A_STR-XALMB sy-vline      INTO ld_text SEPARATED BY SPACE.

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