ABAP Select data from SAP table V_KLEXT1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_KLEXT1 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 V_KLEXT1. 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 V_KLEXT1 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_V_KLEXT1 TYPE STANDARD TABLE OF V_KLEXT1,
      WA_V_KLEXT1 TYPE V_KLEXT1,
      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: <V_KLEXT1> TYPE V_KLEXT1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_KLEXT1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_KLEXT1
  INTO TABLE IT_V_KLEXT1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_KLEXT1
*  INTO TABLE @DATA(IT_V_KLEXT12).
*--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_V_KLEXT1 INDEX 1 INTO DATA(WA_V_KLEXT12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_KLEXT1 ASSIGNING <V_KLEXT1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_KLEXT1>-MANDT_ZUEXT = 1.
<V_KLEXT1>-OBJTYP = 1.
<V_KLEXT1>-KREIS = 1.
<V_KLEXT1>-EXTNR = 1.
<V_KLEXT1>-ARNR_ZUEXT = 1.

ENDLOOP.

LOOP AT IT_V_KLEXT1 INTO WA_V_KLEXT1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_KLEXT1-ARTYP_ZUEXT, sy-vline,
  WA_V_KLEXT1-XAKT, sy-vline,
  WA_V_KLEXT1-LRL_POL, sy-vline,
  WA_V_KLEXT1-BUKRS, sy-vline,
  WA_V_KLEXT1-PARTNR, sy-vline,
  WA_V_KLEXT1-SLPG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_KLEXT1 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_V_KLEXT1 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_V_KLEXT1 INTO WA_V_KLEXT1.


*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 PARTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_KLEXT1-PARTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_KLEXT1-PARTNR.
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_V_KLEXT1_STR, 
MANDT_ZUEXT TYPE STRING,
OBJTYP TYPE STRING,
KREIS TYPE STRING,
EXTNR TYPE STRING,
ARNR_ZUEXT TYPE STRING,
ARTYP_ZUEXT TYPE STRING,
XAKT TYPE STRING,
LRL_POL TYPE STRING,
BUKRS TYPE STRING,
PARTNR TYPE STRING,
SLPG TYPE STRING,
RPORTB TYPE STRING,
RDEALER TYPE STRING,
WAERS TYPE STRING,
CONTROL01 TYPE STRING,
INTORG TYPE STRING,
RCOUNTRY TYPE STRING,
COUNTRY TYPE STRING,
SECTOR TYPE STRING,
RATING TYPE STRING,
CRATING TYPE STRING,
RRFIND TYPE STRING,
CEQCLASS TYPE STRING,
LEQCLASS TYPE STRING,
SKE TYPE STRING,
SPS TYPE STRING,
LRB TYPE STRING,
SRE TYPE STRING,
SARAKT TYPE STRING,
SLRAKT TYPE STRING,
ARR TYPE STRING,
DFIKT TYPE STRING,
SKALID TYPE STRING,
DMWAE TYPE STRING,
DRBD TYPE STRING,
DBLFZ TYPE STRING,
DELFZ TYPE STRING,
UPUSERT TYPE STRING,
DUPDATT TYPE STRING,
TUPTIMT TYPE STRING,
CRUSER TYPE STRING,
DCRDAT TYPE STRING,
TCRTIM TYPE STRING,
MANDT TYPE STRING,
ARNR TYPE STRING,
ARTYP TYPE STRING,
MANDT_PARAM TYPE STRING,
ARNR_PARAM TYPE STRING,
ARTYP_PARAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_KLEXT1_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_V_KLEXT1_STR-MANDT_ZUEXT sy-vline 
WA_V_KLEXT1_STR-OBJTYP sy-vline 
WA_V_KLEXT1_STR-KREIS sy-vline 
WA_V_KLEXT1_STR-EXTNR sy-vline 
WA_V_KLEXT1_STR-ARNR_ZUEXT sy-vline 
WA_V_KLEXT1_STR-ARTYP_ZUEXT sy-vline 
WA_V_KLEXT1_STR-XAKT sy-vline 
WA_V_KLEXT1_STR-LRL_POL sy-vline 
WA_V_KLEXT1_STR-BUKRS sy-vline 
WA_V_KLEXT1_STR-PARTNR sy-vline 
WA_V_KLEXT1_STR-SLPG sy-vline 
WA_V_KLEXT1_STR-RPORTB sy-vline 
WA_V_KLEXT1_STR-RDEALER sy-vline 
WA_V_KLEXT1_STR-WAERS sy-vline 
WA_V_KLEXT1_STR-CONTROL01 sy-vline 
WA_V_KLEXT1_STR-INTORG sy-vline 
WA_V_KLEXT1_STR-RCOUNTRY sy-vline 
WA_V_KLEXT1_STR-COUNTRY sy-vline 
WA_V_KLEXT1_STR-SECTOR sy-vline 
WA_V_KLEXT1_STR-RATING sy-vline 
WA_V_KLEXT1_STR-CRATING sy-vline 
WA_V_KLEXT1_STR-RRFIND sy-vline 
WA_V_KLEXT1_STR-CEQCLASS sy-vline 
WA_V_KLEXT1_STR-LEQCLASS sy-vline 
WA_V_KLEXT1_STR-SKE sy-vline 
WA_V_KLEXT1_STR-SPS sy-vline 
WA_V_KLEXT1_STR-LRB sy-vline 
WA_V_KLEXT1_STR-SRE sy-vline 
WA_V_KLEXT1_STR-SARAKT sy-vline 
WA_V_KLEXT1_STR-SLRAKT sy-vline 
WA_V_KLEXT1_STR-ARR sy-vline 
WA_V_KLEXT1_STR-DFIKT sy-vline 
WA_V_KLEXT1_STR-SKALID sy-vline 
WA_V_KLEXT1_STR-DMWAE sy-vline 
WA_V_KLEXT1_STR-DRBD sy-vline 
WA_V_KLEXT1_STR-DBLFZ sy-vline 
WA_V_KLEXT1_STR-DELFZ sy-vline 
WA_V_KLEXT1_STR-UPUSERT sy-vline 
WA_V_KLEXT1_STR-DUPDATT sy-vline 
WA_V_KLEXT1_STR-TUPTIMT sy-vline 
WA_V_KLEXT1_STR-CRUSER sy-vline 
WA_V_KLEXT1_STR-DCRDAT sy-vline 
WA_V_KLEXT1_STR-TCRTIM sy-vline 
WA_V_KLEXT1_STR-MANDT sy-vline 
WA_V_KLEXT1_STR-ARNR sy-vline 
WA_V_KLEXT1_STR-ARTYP sy-vline 
WA_V_KLEXT1_STR-MANDT_PARAM sy-vline 
WA_V_KLEXT1_STR-ARNR_PARAM sy-vline 
WA_V_KLEXT1_STR-ARTYP_PARAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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