ABAP Select data from SAP table RDSV_KUNNR_LAST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RDSV_KUNNR_LAST
*  INTO TABLE @DATA(IT_RDSV_KUNNR_LAST2).
*--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_RDSV_KUNNR_LAST INDEX 1 INTO DATA(WA_RDSV_KUNNR_LAST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RDSV_KUNNR_LAST>-MANDT = 1.
<RDSV_KUNNR_LAST>-INTCA = 1.
<RDSV_KUNNR_LAST>-KUNNR = 1.
<RDSV_KUNNR_LAST>-NATION = 1.
<RDSV_KUNNR_LAST>-VERSION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RDSV_KUNNR_LAST-ADRNR, sy-vline,
  WA_RDSV_KUNNR_LAST-NAME1, sy-vline,
  WA_RDSV_KUNNR_LAST-NAME2, sy-vline,
  WA_RDSV_KUNNR_LAST-NAME3, sy-vline,
  WA_RDSV_KUNNR_LAST-NAME4, sy-vline,
  WA_RDSV_KUNNR_LAST-CITY1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RDSV_KUNNR_LAST 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_RDSV_KUNNR_LAST 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_RDSV_KUNNR_LAST INTO WA_RDSV_KUNNR_LAST.


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

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RDSV_KUNNR_LAST-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RDSV_KUNNR_LAST-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_RDSV_KUNNR_LAST_STR, 
MANDT TYPE STRING,
INTCA TYPE STRING,
KUNNR TYPE STRING,
NATION TYPE STRING,
VERSION TYPE STRING,
ADRNR TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
CITY1 TYPE STRING,
STREET TYPE STRING,
STR_SUPPL1 TYPE STRING,
STR_SUPPL2 TYPE STRING,
STR_SUPPL3 TYPE STRING,
HOUSE_NUM1 TYPE STRING,
HOUSE_NUM2 TYPE STRING,
LOCATION TYPE STRING,
POST_CODE1 TYPE STRING,
POST_CODE2 TYPE STRING,
POST_CODE3 TYPE STRING,
PO_BOX TYPE STRING,
PO_BOX_LOC TYPE STRING,
PO_BOX_REG TYPE STRING,
PO_BOX_CTY TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RDSV_KUNNR_LAST_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_RDSV_KUNNR_LAST_STR-MANDT sy-vline 
WA_RDSV_KUNNR_LAST_STR-INTCA sy-vline 
WA_RDSV_KUNNR_LAST_STR-KUNNR sy-vline 
WA_RDSV_KUNNR_LAST_STR-NATION sy-vline 
WA_RDSV_KUNNR_LAST_STR-VERSION sy-vline 
WA_RDSV_KUNNR_LAST_STR-ADRNR sy-vline 
WA_RDSV_KUNNR_LAST_STR-NAME1 sy-vline 
WA_RDSV_KUNNR_LAST_STR-NAME2 sy-vline 
WA_RDSV_KUNNR_LAST_STR-NAME3 sy-vline 
WA_RDSV_KUNNR_LAST_STR-NAME4 sy-vline 
WA_RDSV_KUNNR_LAST_STR-CITY1 sy-vline 
WA_RDSV_KUNNR_LAST_STR-STREET sy-vline 
WA_RDSV_KUNNR_LAST_STR-STR_SUPPL1 sy-vline 
WA_RDSV_KUNNR_LAST_STR-STR_SUPPL2 sy-vline 
WA_RDSV_KUNNR_LAST_STR-STR_SUPPL3 sy-vline 
WA_RDSV_KUNNR_LAST_STR-HOUSE_NUM1 sy-vline 
WA_RDSV_KUNNR_LAST_STR-HOUSE_NUM2 sy-vline 
WA_RDSV_KUNNR_LAST_STR-LOCATION sy-vline 
WA_RDSV_KUNNR_LAST_STR-POST_CODE1 sy-vline 
WA_RDSV_KUNNR_LAST_STR-POST_CODE2 sy-vline 
WA_RDSV_KUNNR_LAST_STR-POST_CODE3 sy-vline 
WA_RDSV_KUNNR_LAST_STR-PO_BOX sy-vline 
WA_RDSV_KUNNR_LAST_STR-PO_BOX_LOC sy-vline 
WA_RDSV_KUNNR_LAST_STR-PO_BOX_REG sy-vline 
WA_RDSV_KUNNR_LAST_STR-PO_BOX_CTY sy-vline 
WA_RDSV_KUNNR_LAST_STR-COUNTRY sy-vline 
WA_RDSV_KUNNR_LAST_STR-REGION sy-vline      INTO ld_text SEPARATED BY SPACE.

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