ABAP Select data from SAP table KPP1B into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KPP1B 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 KPP1B. 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 KPP1B 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_KPP1B TYPE STANDARD TABLE OF KPP1B,
      WA_KPP1B TYPE KPP1B,
      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: <KPP1B> TYPE KPP1B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KPP1B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KPP1B
  INTO TABLE IT_KPP1B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KPP1B
*  INTO TABLE @DATA(IT_KPP1B2).
*--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_KPP1B INDEX 1 INTO DATA(WA_KPP1B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KPP1B ASSIGNING <KPP1B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KPP1B>-TOTAL = 1.
<KPP1B>-WAERS = 1.
<KPP1B>-SPRED = 1.
<KPP1B>-UNIT = 1.
<KPP1B>-ACTION = 1.

ENDLOOP.

LOOP AT IT_KPP1B INTO WA_KPP1B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KPP1B-VALUE, sy-vline,
  WA_KPP1B-SFELD, sy-vline,
  WA_KPP1B-XFELD, sy-vline,
  WA_KPP1B-TEXT, sy-vline,
  WA_KPP1B-FRAME, sy-vline,
  WA_KPP1B-POSCNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KPP1B 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_KPP1B 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_KPP1B INTO WA_KPP1B.


*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 AC172, internal->external for field TOTAL
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_KPP1B-TOTAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPP1B-TOTAL.
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_KPP1B_STR, 
TOTAL TYPE STRING,
WAERS TYPE STRING,
SPRED TYPE STRING,
UNIT TYPE STRING,
ACTION TYPE STRING,
VALUE TYPE STRING,
SFELD TYPE STRING,
XFELD TYPE STRING,
TEXT TYPE STRING,
FRAME TYPE STRING,
POSCNT TYPE STRING,
LINCNT TYPE STRING,
FORPL TYPE STRING,
ONLY TYPE STRING,
SUM TYPE STRING,
POPUP_VAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KPP1B_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_KPP1B_STR-TOTAL sy-vline 
WA_KPP1B_STR-WAERS sy-vline 
WA_KPP1B_STR-SPRED sy-vline 
WA_KPP1B_STR-UNIT sy-vline 
WA_KPP1B_STR-ACTION sy-vline 
WA_KPP1B_STR-VALUE sy-vline 
WA_KPP1B_STR-SFELD sy-vline 
WA_KPP1B_STR-XFELD sy-vline 
WA_KPP1B_STR-TEXT sy-vline 
WA_KPP1B_STR-FRAME sy-vline 
WA_KPP1B_STR-POSCNT sy-vline 
WA_KPP1B_STR-LINCNT sy-vline 
WA_KPP1B_STR-FORPL sy-vline 
WA_KPP1B_STR-ONLY sy-vline 
WA_KPP1B_STR-SUM sy-vline 
WA_KPP1B_STR-POPUP_VAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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