ABAP Select data from SAP table KV030 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KV030 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 KV030. 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 KV030 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_KV030 TYPE STANDARD TABLE OF KV030,
      WA_KV030 TYPE KV030,
      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: <KV030> TYPE KV030.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KV030.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KV030
  INTO TABLE IT_KV030.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KV030
*  INTO TABLE @DATA(IT_KV0302).
*--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_KV030 INDEX 1 INTO DATA(WA_KV0302).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KV030 ASSIGNING <KV030>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KV030>-AWOBA = 1.
<KV030>-KOKRS = 1.
<KV030>-AWVRS = 1.
<KV030>-AWWTB = 1.
<KV030>-AWVSB = 1.

ENDLOOP.

LOOP AT IT_KV030 INTO WA_KV030.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KV030-AWSVS, sy-vline,
  WA_KV030-AWWTV, sy-vline,
  WA_KV030-AWVSV, sy-vline,
  WA_KV030-AWKVT, sy-vline,
  WA_KV030-AWKAV, sy-vline,
  WA_KV030-AWSFS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KV030 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_KV030 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_KV030 INTO WA_KV030.


*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 AWVRS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV030-AWVRS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV030-AWVRS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWWTB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV030-AWWTB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV030-AWWTB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWVSB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV030-AWVSB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV030-AWVSB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWSVS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV030-AWSVS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV030-AWSVS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWWTV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV030-AWWTV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV030-AWWTV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWVSV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV030-AWVSV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV030-AWVSV.
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_KV030_STR, 
AWOBA TYPE STRING,
KOKRS TYPE STRING,
AWVRS TYPE STRING,
AWWTB TYPE STRING,
AWVSB TYPE STRING,
AWSVS TYPE STRING,
AWWTV TYPE STRING,
AWVSV TYPE STRING,
AWKVT TYPE STRING,
AWKAV TYPE STRING,
AWSFS TYPE STRING,
AWVAR TYPE STRING,
AWRRS TYPE STRING,
AWRPR TYPE STRING,
AWRMG TYPE STRING,
AWRST TYPE STRING,
AWRFX TYPE STRING,
AWRLG TYPE STRING,
AWATX TYPE STRING,
AWVTX TYPE STRING,
AWSTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KV030_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_KV030_STR-AWOBA sy-vline 
WA_KV030_STR-KOKRS sy-vline 
WA_KV030_STR-AWVRS sy-vline 
WA_KV030_STR-AWWTB sy-vline 
WA_KV030_STR-AWVSB sy-vline 
WA_KV030_STR-AWSVS sy-vline 
WA_KV030_STR-AWWTV sy-vline 
WA_KV030_STR-AWVSV sy-vline 
WA_KV030_STR-AWKVT sy-vline 
WA_KV030_STR-AWKAV sy-vline 
WA_KV030_STR-AWSFS sy-vline 
WA_KV030_STR-AWVAR sy-vline 
WA_KV030_STR-AWRRS sy-vline 
WA_KV030_STR-AWRPR sy-vline 
WA_KV030_STR-AWRMG sy-vline 
WA_KV030_STR-AWRST sy-vline 
WA_KV030_STR-AWRFX sy-vline 
WA_KV030_STR-AWRLG sy-vline 
WA_KV030_STR-AWATX sy-vline 
WA_KV030_STR-AWVTX sy-vline 
WA_KV030_STR-AWSTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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