ABAP Select data from SAP table KV20A_IND into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KV20A_IND 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 KV20A_IND. 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 KV20A_IND 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_KV20A_IND TYPE STANDARD TABLE OF KV20A_IND,
      WA_KV20A_IND TYPE KV20A_IND,
      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: <KV20A_IND> TYPE KV20A_IND.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KV20A_IND.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KV20A_IND
  INTO TABLE IT_KV20A_IND.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KV20A_IND
*  INTO TABLE @DATA(IT_KV20A_IND2).
*--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_KV20A_IND INDEX 1 INTO DATA(WA_KV20A_IND2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KV20A_IND ASSIGNING <KV20A_IND>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KV20A_IND>-AFWIP = 1.
<KV20A_IND>-AFSCP = 1.
<KV20A_IND>-AFCTL = 1.
<KV20A_IND>-AFOUT = 1.
<KV20A_IND>-AFSTL = 1.

ENDLOOP.

LOOP AT IT_KV20A_IND INTO WA_KV20A_IND.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KV20A_IND-VALTY, sy-vline,
  WA_KV20A_IND-REFVS, sy-vline,
  WA_KV20A_IND-WIPDF, sy-vline,
  WA_KV20A_IND-ABWDF, sy-vline,
  WA_KV20A_IND-ACTDF, sy-vline,
  WA_KV20A_IND-PLNDF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KV20A_IND 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_KV20A_IND 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_KV20A_IND INTO WA_KV20A_IND.


*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 REFVS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV20A_IND-REFVS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV20A_IND-REFVS.
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_KV20A_IND_STR, 
AFWIP TYPE STRING,
AFSCP TYPE STRING,
AFCTL TYPE STRING,
AFOUT TYPE STRING,
AFSTL TYPE STRING,
VALTY TYPE STRING,
REFVS TYPE STRING,
WIPDF TYPE STRING,
ABWDF TYPE STRING,
ACTDF TYPE STRING,
PLNDF TYPE STRING,
DELTA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KV20A_IND_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_KV20A_IND_STR-AFWIP sy-vline 
WA_KV20A_IND_STR-AFSCP sy-vline 
WA_KV20A_IND_STR-AFCTL sy-vline 
WA_KV20A_IND_STR-AFOUT sy-vline 
WA_KV20A_IND_STR-AFSTL sy-vline 
WA_KV20A_IND_STR-VALTY sy-vline 
WA_KV20A_IND_STR-REFVS sy-vline 
WA_KV20A_IND_STR-WIPDF sy-vline 
WA_KV20A_IND_STR-ABWDF sy-vline 
WA_KV20A_IND_STR-ACTDF sy-vline 
WA_KV20A_IND_STR-PLNDF sy-vline 
WA_KV20A_IND_STR-DELTA sy-vline      INTO ld_text SEPARATED BY SPACE.

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