ABAP Select data from SAP table VVKK_CLINFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VVKK_CLINFO
*  INTO TABLE @DATA(IT_VVKK_CLINFO2).
*--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_VVKK_CLINFO INDEX 1 INTO DATA(WA_VVKK_CLINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VVKK_CLINFO>-GPART = 1.
<VVKK_CLINFO>-VKONT = 1.
<VVKK_CLINFO>-VTREF = 1.
<VVKK_CLINFO>-SUBAP = 1.
<VVKK_CLINFO>-VKPBZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VVKK_CLINFO-XKART, sy-vline,
  WA_VVKK_CLINFO-VKTYP, sy-vline,
  WA_VVKK_CLINFO-KTOSI, sy-vline,
  WA_VVKK_CLINFO-XVEIN, sy-vline,
  WA_VVKK_CLINFO-KONTF, sy-vline,
  WA_VVKK_CLINFO-UVVAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VVKK_CLINFO 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_VVKK_CLINFO 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_VVKK_CLINFO INTO WA_VVKK_CLINFO.


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

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

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VVKK_CLINFO-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VVKK_CLINFO-VTREF.
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_VVKK_CLINFO_STR, 
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
VKPBZ TYPE STRING,
XKART TYPE STRING,
VKTYP TYPE STRING,
KTOSI TYPE STRING,
XVEIN TYPE STRING,
KONTF TYPE STRING,
UVVAR TYPE STRING,
BUKRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VVKK_CLINFO_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_VVKK_CLINFO_STR-GPART sy-vline 
WA_VVKK_CLINFO_STR-VKONT sy-vline 
WA_VVKK_CLINFO_STR-VTREF sy-vline 
WA_VVKK_CLINFO_STR-SUBAP sy-vline 
WA_VVKK_CLINFO_STR-VKPBZ sy-vline 
WA_VVKK_CLINFO_STR-XKART sy-vline 
WA_VVKK_CLINFO_STR-VKTYP sy-vline 
WA_VVKK_CLINFO_STR-KTOSI sy-vline 
WA_VVKK_CLINFO_STR-XVEIN sy-vline 
WA_VVKK_CLINFO_STR-KONTF sy-vline 
WA_VVKK_CLINFO_STR-UVVAR sy-vline 
WA_VVKK_CLINFO_STR-BUKRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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