ABAP Select data from SAP table RNSBEW into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNSBEW 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 RNSBEW. 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 RNSBEW 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_RNSBEW TYPE STANDARD TABLE OF RNSBEW,
      WA_RNSBEW TYPE RNSBEW,
      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: <RNSBEW> TYPE RNSBEW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNSBEW
*  INTO TABLE @DATA(IT_RNSBEW2).
*--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_RNSBEW INDEX 1 INTO DATA(WA_RNSBEW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNSBEW>-FALNR = 1.
<RNSBEW>-FACHR = 1.
<RNSBEW>-ORGFA = 1.
<RNSBEW>-ORGPF = 1.
<RNSBEW>-BEWTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNSBEW-BWART, sy-vline,
  WA_RNSBEW-BWIDT, sy-vline,
  WA_RNSBEW-BWIZT, sy-vline,
  WA_RNSBEW-BWEDT, sy-vline,
  WA_RNSBEW-BWEZT, sy-vline,
  WA_RNSBEW-LFDNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNSBEW 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_RNSBEW 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_RNSBEW INTO WA_RNSBEW.


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

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

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

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

*Conversion exit ALPHA, internal->external for field FALNR_OLD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNSBEW-FALNR_OLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNSBEW-FALNR_OLD.
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_RNSBEW_STR, 
FALNR TYPE STRING,
FACHR TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
BEWTY TYPE STRING,
BWART TYPE STRING,
BWIDT TYPE STRING,
BWIZT TYPE STRING,
BWEDT TYPE STRING,
BWEZT TYPE STRING,
LFDNR TYPE STRING,
INTEN TYPE STRING,
INTEN_FACH TYPE STRING,
PFTAGE_AUS TYPE STRING,
PFTAGE_VER TYPE STRING,
BETAGE_AUS TYPE STRING,
BETAGE_VER TYPE STRING,
RELEVANT TYPE STRING,
FALNR_OLD TYPE STRING,
BWART_OLD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNSBEW_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_RNSBEW_STR-FALNR sy-vline 
WA_RNSBEW_STR-FACHR sy-vline 
WA_RNSBEW_STR-ORGFA sy-vline 
WA_RNSBEW_STR-ORGPF sy-vline 
WA_RNSBEW_STR-BEWTY sy-vline 
WA_RNSBEW_STR-BWART sy-vline 
WA_RNSBEW_STR-BWIDT sy-vline 
WA_RNSBEW_STR-BWIZT sy-vline 
WA_RNSBEW_STR-BWEDT sy-vline 
WA_RNSBEW_STR-BWEZT sy-vline 
WA_RNSBEW_STR-LFDNR sy-vline 
WA_RNSBEW_STR-INTEN sy-vline 
WA_RNSBEW_STR-INTEN_FACH sy-vline 
WA_RNSBEW_STR-PFTAGE_AUS sy-vline 
WA_RNSBEW_STR-PFTAGE_VER sy-vline 
WA_RNSBEW_STR-BETAGE_AUS sy-vline 
WA_RNSBEW_STR-BETAGE_VER sy-vline 
WA_RNSBEW_STR-RELEVANT sy-vline 
WA_RNSBEW_STR-FALNR_OLD sy-vline 
WA_RNSBEW_STR-BWART_OLD sy-vline      INTO ld_text SEPARATED BY SPACE.

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