ABAP Select data from SAP table RNF71 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNF71 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 RNF71. 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 RNF71 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_RNF71 TYPE STANDARD TABLE OF RNF71,
      WA_RNF71 TYPE RNF71,
      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: <RNF71> TYPE RNF71.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNF71.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNF71
  INTO TABLE IT_RNF71.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNF71
*  INTO TABLE @DATA(IT_RNF712).
*--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_RNF71 INDEX 1 INTO DATA(WA_RNF712).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNF71 ASSIGNING <RNF71>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNF71>-STORID = 1.
<RNF71>-STORTX = 1.
<RNF71>-STORNR = 1.
<RNF71>-STORREM = 1.
<RNF71>-ORGID = 1.

ENDLOOP.

LOOP AT IT_RNF71 INTO WA_RNF71.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNF71-SHELF, sy-vline,
  WA_RNF71-BIN, sy-vline,
  WA_RNF71-MATNR, sy-vline,
  WA_RNF71-MAKTX, sy-vline,
  WA_RNF71-MATKL, sy-vline,
  WA_RNF71-MTART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNF71 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_RNF71 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_RNF71 INTO WA_RNF71.


*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 STORID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF71-STORID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF71-STORID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STORNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF71-STORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF71-STORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF71-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF71-ORGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SHELF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF71-SHELF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF71-SHELF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BIN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNF71-BIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF71-BIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RNF71-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF71-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RNF71-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNF71-MEINS.
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_RNF71_STR, 
STORID TYPE STRING,
STORTX TYPE STRING,
STORNR TYPE STRING,
STORREM TYPE STRING,
ORGID TYPE STRING,
SHELF TYPE STRING,
BIN TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
MATKL TYPE STRING,
MTART TYPE STRING,
WERKS TYPE STRING,
WERKS_NAME1 TYPE STRING,
MENGE TYPE STRING,
MINBE TYPE STRING,
MABST TYPE STRING,
MEINS TYPE STRING,
REPLKZ TYPE STRING,
REMARK TYPE STRING,
MARK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNF71_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_RNF71_STR-STORID sy-vline 
WA_RNF71_STR-STORTX sy-vline 
WA_RNF71_STR-STORNR sy-vline 
WA_RNF71_STR-STORREM sy-vline 
WA_RNF71_STR-ORGID sy-vline 
WA_RNF71_STR-SHELF sy-vline 
WA_RNF71_STR-BIN sy-vline 
WA_RNF71_STR-MATNR sy-vline 
WA_RNF71_STR-MAKTX sy-vline 
WA_RNF71_STR-MATKL sy-vline 
WA_RNF71_STR-MTART sy-vline 
WA_RNF71_STR-WERKS sy-vline 
WA_RNF71_STR-WERKS_NAME1 sy-vline 
WA_RNF71_STR-MENGE sy-vline 
WA_RNF71_STR-MINBE sy-vline 
WA_RNF71_STR-MABST sy-vline 
WA_RNF71_STR-MEINS sy-vline 
WA_RNF71_STR-REPLKZ sy-vline 
WA_RNF71_STR-REMARK sy-vline 
WA_RNF71_STR-MARK sy-vline      INTO ld_text SEPARATED BY SPACE.

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