ABAP Select data from SAP table RFRRS52 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFRRS52 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 RFRRS52. 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 RFRRS52 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_RFRRS52 TYPE STANDARD TABLE OF RFRRS52,
      WA_RFRRS52 TYPE RFRRS52,
      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: <RFRRS52> TYPE RFRRS52.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFRRS52.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFRRS52
  INTO TABLE IT_RFRRS52.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFRRS52
*  INTO TABLE @DATA(IT_RFRRS522).
*--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_RFRRS52 INDEX 1 INTO DATA(WA_RFRRS522).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFRRS52 ASSIGNING <RFRRS52>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFRRS52>-VERSN = 1.
<RFRRS52>-BILTP = 1.
<RFRRS52>-CURTP = 1.
<RFRRS52>-WAERS = 1.
<RFRRS52>-RRCTY = 1.

ENDLOOP.

LOOP AT IT_RFRRS52 INTO WA_RFRRS52.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFRRS52-RVERS, sy-vline,
  WA_RFRRS52-ERGSL, sy-vline,
  WA_RFRRS52-KTOPL, sy-vline,
  WA_RFRRS52-SAKNR, sy-vline,
  WA_RFRRS52-PLUMI, sy-vline,
  WA_RFRRS52-SAKN1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFRRS52 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_RFRRS52 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_RFRRS52 INTO WA_RFRRS52.


*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 RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-RVERS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-SAKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-SAKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAKN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-SAKN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-SAKN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RCOMP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-RCOMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-RCOMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field PERIO
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-PERIO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-PERIO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field WERTB
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-WERTB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-WERTB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field WERTE
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-WERTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-WERTE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MENGE_ME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RFRRS52-MENGE_ME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFRRS52-MENGE_ME.
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_RFRRS52_STR, 
VERSN TYPE STRING,
BILTP TYPE STRING,
CURTP TYPE STRING,
WAERS TYPE STRING,
RRCTY TYPE STRING,
RVERS TYPE STRING,
ERGSL TYPE STRING,
KTOPL TYPE STRING,
SAKNR TYPE STRING,
PLUMI TYPE STRING,
SAKN1 TYPE STRING,
KONST TYPE STRING,
RCOMP TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
FKBER TYPE STRING,
GJAHR TYPE STRING,
PERDE TYPE STRING,
PERIO TYPE STRING,
RLDNR TYPE STRING,
WERTB TYPE STRING,
WERTE TYPE STRING,
MENGE TYPE STRING,
MENGE_ME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFRRS52_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_RFRRS52_STR-VERSN sy-vline 
WA_RFRRS52_STR-BILTP sy-vline 
WA_RFRRS52_STR-CURTP sy-vline 
WA_RFRRS52_STR-WAERS sy-vline 
WA_RFRRS52_STR-RRCTY sy-vline 
WA_RFRRS52_STR-RVERS sy-vline 
WA_RFRRS52_STR-ERGSL sy-vline 
WA_RFRRS52_STR-KTOPL sy-vline 
WA_RFRRS52_STR-SAKNR sy-vline 
WA_RFRRS52_STR-PLUMI sy-vline 
WA_RFRRS52_STR-SAKN1 sy-vline 
WA_RFRRS52_STR-KONST sy-vline 
WA_RFRRS52_STR-RCOMP sy-vline 
WA_RFRRS52_STR-BUKRS sy-vline 
WA_RFRRS52_STR-GSBER sy-vline 
WA_RFRRS52_STR-FKBER sy-vline 
WA_RFRRS52_STR-GJAHR sy-vline 
WA_RFRRS52_STR-PERDE sy-vline 
WA_RFRRS52_STR-PERIO sy-vline 
WA_RFRRS52_STR-RLDNR sy-vline 
WA_RFRRS52_STR-WERTB sy-vline 
WA_RFRRS52_STR-WERTE sy-vline 
WA_RFRRS52_STR-MENGE sy-vline 
WA_RFRRS52_STR-MENGE_ME sy-vline      INTO ld_text SEPARATED BY SPACE.

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