ABAP Select data from SAP table KNVV_ADDR_SRC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KNVV_ADDR_SRC
*  INTO TABLE @DATA(IT_KNVV_ADDR_SRC2).
*--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_KNVV_ADDR_SRC INDEX 1 INTO DATA(WA_KNVV_ADDR_SRC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KNVV_ADDR_SRC>-CLIENT = 1.
<KNVV_ADDR_SRC>-SOURCE_SYSTEM = 1.
<KNVV_ADDR_SRC>-SOURCE_ID = 1.
<KNVV_ADDR_SRC>-SOURCE_ADDRNUMBER = 1.
<KNVV_ADDR_SRC>-VKORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KNVV_ADDR_SRC-VTWEG, sy-vline,
  WA_KNVV_ADDR_SRC-SPART, sy-vline,
  WA_KNVV_ADDR_SRC-KUNNR, sy-vline,
  WA_KNVV_ADDR_SRC-ADRNR, sy-vline,
  WA_KNVV_ADDR_SRC-INCO1, sy-vline,
  WA_KNVV_ADDR_SRC-LIFSD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KNVV_ADDR_SRC 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_KNVV_ADDR_SRC 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_KNVV_ADDR_SRC INTO WA_KNVV_ADDR_SRC.


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

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

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KNVV_ADDR_SRC-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KNVV_ADDR_SRC-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_KNVV_ADDR_SRC_STR, 
CLIENT TYPE STRING,
SOURCE_SYSTEM TYPE STRING,
SOURCE_ID TYPE STRING,
SOURCE_ADDRNUMBER TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
KUNNR TYPE STRING,
ADRNR TYPE STRING,
INCO1 TYPE STRING,
LIFSD TYPE STRING,
VKBUR TYPE STRING,
VKGRP TYPE STRING,
VSBED TYPE STRING,
VWERK TYPE STRING,
INCOV TYPE STRING,
INCO2_L TYPE STRING,
INCO3_L TYPE STRING,
KNVV_ADDR_EEW_CUST TYPE STRING,
SOURCE_RECENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KNVV_ADDR_SRC_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_KNVV_ADDR_SRC_STR-CLIENT sy-vline 
WA_KNVV_ADDR_SRC_STR-SOURCE_SYSTEM sy-vline 
WA_KNVV_ADDR_SRC_STR-SOURCE_ID sy-vline 
WA_KNVV_ADDR_SRC_STR-SOURCE_ADDRNUMBER sy-vline 
WA_KNVV_ADDR_SRC_STR-VKORG sy-vline 
WA_KNVV_ADDR_SRC_STR-VTWEG sy-vline 
WA_KNVV_ADDR_SRC_STR-SPART sy-vline 
WA_KNVV_ADDR_SRC_STR-KUNNR sy-vline 
WA_KNVV_ADDR_SRC_STR-ADRNR sy-vline 
WA_KNVV_ADDR_SRC_STR-INCO1 sy-vline 
WA_KNVV_ADDR_SRC_STR-LIFSD sy-vline 
WA_KNVV_ADDR_SRC_STR-VKBUR sy-vline 
WA_KNVV_ADDR_SRC_STR-VKGRP sy-vline 
WA_KNVV_ADDR_SRC_STR-VSBED sy-vline 
WA_KNVV_ADDR_SRC_STR-VWERK sy-vline 
WA_KNVV_ADDR_SRC_STR-INCOV sy-vline 
WA_KNVV_ADDR_SRC_STR-INCO2_L sy-vline 
WA_KNVV_ADDR_SRC_STR-INCO3_L sy-vline 
WA_KNVV_ADDR_SRC_STR-KNVV_ADDR_EEW_CUST sy-vline 
WA_KNVV_ADDR_SRC_STR-SOURCE_RECENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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