ABAP Select data from SAP table KPP0L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KPP0L 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 KPP0L. 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 KPP0L 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_KPP0L TYPE STANDARD TABLE OF KPP0L,
      WA_KPP0L TYPE KPP0L,
      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: <KPP0L> TYPE KPP0L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KPP0L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KPP0L
  INTO TABLE IT_KPP0L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KPP0L
*  INTO TABLE @DATA(IT_KPP0L2).
*--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_KPP0L INDEX 1 INTO DATA(WA_KPP0L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KPP0L ASSIGNING <KPP0L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KPP0L>-RATIO = 1.
<KPP0L>-CONT = 1.
<KPP0L>-ROW = 1.
<KPP0L>-COL = 1.
<KPP0L>-DCLASS = 1.

ENDLOOP.

LOOP AT IT_KPP0L INTO WA_KPP0L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KPP0L-UATTR, sy-vline,
  WA_KPP0L-ATTRB, sy-vline,
  WA_KPP0L-INPUT, sy-vline,
  WA_KPP0L-MODIFY, sy-vline,
  WA_KPP0L-CALCM, sy-vline,
  WA_KPP0L-CALCMF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KPP0L 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_KPP0L 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_KPP0L INTO WA_KPP0L.


*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 UATTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KPP0L-UATTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPP0L-UATTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ATTRB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KPP0L-ATTRB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPP0L-ATTRB.
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_KPP0L_STR, 
RATIO TYPE STRING,
CONT TYPE STRING,
ROW TYPE STRING,
COL TYPE STRING,
DCLASS TYPE STRING,
UATTR TYPE STRING,
ATTRB TYPE STRING,
INPUT TYPE STRING,
MODIFY TYPE STRING,
CALCM TYPE STRING,
CALCMF TYPE STRING,
DB_UNIT TYPE STRING,
AZ_UNIT TYPE STRING,
DEC_DBUNIT TYPE STRING,
ANDEC_QUAN TYPE STRING,
MWKZ TYPE STRING,
NOT_SUMMABLE TYPE STRING,
SIGN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KPP0L_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_KPP0L_STR-RATIO sy-vline 
WA_KPP0L_STR-CONT sy-vline 
WA_KPP0L_STR-ROW sy-vline 
WA_KPP0L_STR-COL sy-vline 
WA_KPP0L_STR-DCLASS sy-vline 
WA_KPP0L_STR-UATTR sy-vline 
WA_KPP0L_STR-ATTRB sy-vline 
WA_KPP0L_STR-INPUT sy-vline 
WA_KPP0L_STR-MODIFY sy-vline 
WA_KPP0L_STR-CALCM sy-vline 
WA_KPP0L_STR-CALCMF sy-vline 
WA_KPP0L_STR-DB_UNIT sy-vline 
WA_KPP0L_STR-AZ_UNIT sy-vline 
WA_KPP0L_STR-DEC_DBUNIT sy-vline 
WA_KPP0L_STR-ANDEC_QUAN sy-vline 
WA_KPP0L_STR-MWKZ sy-vline 
WA_KPP0L_STR-NOT_SUMMABLE sy-vline 
WA_KPP0L_STR-SIGN sy-vline      INTO ld_text SEPARATED BY SPACE.

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