ABAP Select data from SAP table KPP1L into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP KPP1L 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 KPP1L. 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 KPP1L 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_KPP1L TYPE STANDARD TABLE OF KPP1L,
      WA_KPP1L TYPE KPP1L,
      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: <KPP1L> TYPE KPP1L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KPP1L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KPP1L
  INTO TABLE IT_KPP1L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KPP1L
*  INTO TABLE @DATA(IT_KPP1L2).
*--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_KPP1L INDEX 1 INTO DATA(WA_KPP1L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KPP1L ASSIGNING <KPP1L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KPP1L>-RATIO = 1.
<KPP1L>-CONT = 1.
<KPP1L>-ROW = 1.
<KPP1L>-COL = 1.
<KPP1L>-VALUE = 1.

ENDLOOP.

LOOP AT IT_KPP1L INTO WA_KPP1L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KPP1L-LRIGHT, sy-vline,
  WA_KPP1L-REQUEST, sy-vline,
  WA_KPP1L-MARK_ROW, sy-vline,
  WA_KPP1L-MARK_COL, sy-vline,
  WA_KPP1L-MARK_CELL, sy-vline,
  WA_KPP1L-DB_DECIM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KPP1L 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_KPP1L 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_KPP1L INTO WA_KPP1L.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_KPP1L-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPP1L-DATATYPE.
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_KPP1L_STR, 
RATIO TYPE STRING,
CONT TYPE STRING,
ROW TYPE STRING,
COL TYPE STRING,
VALUE TYPE STRING,
LRIGHT TYPE STRING,
REQUEST TYPE STRING,
MARK_ROW TYPE STRING,
MARK_COL TYPE STRING,
MARK_CELL TYPE STRING,
DB_DECIM TYPE STRING,
SCR_DECIM TYPE STRING,
DECAN_QUAN TYPE STRING,
SCALE TYPE STRING,
INPUT TYPE STRING,
MODIFY TYPE STRING,
ACTIVE TYPE STRING,
LENG TYPE STRING,
INTLEN TYPE STRING,
OUTPUTLEN TYPE STRING,
INTTYPE TYPE STRING,
DATATYPE TYPE STRING,
CONVEXIT TYPE STRING,
LEAF TYPE STRING,
DISP_LEVEL TYPE STRING,
SUM_TYPE TYPE STRING,
XFELD TYPE STRING,
INIVAL TYPE STRING,
FTYPE TYPE STRING,
ROW_1LG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KPP1L_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_KPP1L_STR-RATIO sy-vline 
WA_KPP1L_STR-CONT sy-vline 
WA_KPP1L_STR-ROW sy-vline 
WA_KPP1L_STR-COL sy-vline 
WA_KPP1L_STR-VALUE sy-vline 
WA_KPP1L_STR-LRIGHT sy-vline 
WA_KPP1L_STR-REQUEST sy-vline 
WA_KPP1L_STR-MARK_ROW sy-vline 
WA_KPP1L_STR-MARK_COL sy-vline 
WA_KPP1L_STR-MARK_CELL sy-vline 
WA_KPP1L_STR-DB_DECIM sy-vline 
WA_KPP1L_STR-SCR_DECIM sy-vline 
WA_KPP1L_STR-DECAN_QUAN sy-vline 
WA_KPP1L_STR-SCALE sy-vline 
WA_KPP1L_STR-INPUT sy-vline 
WA_KPP1L_STR-MODIFY sy-vline 
WA_KPP1L_STR-ACTIVE sy-vline 
WA_KPP1L_STR-LENG sy-vline 
WA_KPP1L_STR-INTLEN sy-vline 
WA_KPP1L_STR-OUTPUTLEN sy-vline 
WA_KPP1L_STR-INTTYPE sy-vline 
WA_KPP1L_STR-DATATYPE sy-vline 
WA_KPP1L_STR-CONVEXIT sy-vline 
WA_KPP1L_STR-LEAF sy-vline 
WA_KPP1L_STR-DISP_LEVEL sy-vline 
WA_KPP1L_STR-SUM_TYPE sy-vline 
WA_KPP1L_STR-XFELD sy-vline 
WA_KPP1L_STR-INIVAL sy-vline 
WA_KPP1L_STR-FTYPE sy-vline 
WA_KPP1L_STR-ROW_1LG sy-vline      INTO ld_text SEPARATED BY SPACE.

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