ABAP Select data from SAP table KPZP0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KPZP0 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 KPZP0. 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 KPZP0 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_KPZP0 TYPE STANDARD TABLE OF KPZP0,
      WA_KPZP0 TYPE KPZP0,
      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: <KPZP0> TYPE KPZP0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KPZP0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KPZP0
  INTO TABLE IT_KPZP0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KPZP0
*  INTO TABLE @DATA(IT_KPZP02).
*--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_KPZP0 INDEX 1 INTO DATA(WA_KPZP02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KPZP0 ASSIGNING <KPZP0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KPZP0>-OBJNR = 1.
<KPZP0>-PLNFL = 1.
<KPZP0>-GJAHR = 1.
<KPZP0>-PERBL = 1.
<KPZP0>-VORNE = 1.

ENDLOOP.

LOOP AT IT_KPZP0 INTO WA_KPZP0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KPZP0-MEINH, sy-vline,
  WA_KPZP0-AUFAK, sy-vline,
  WA_KPZP0-LMVRG, sy-vline,
  WA_KPZP0-XMVRG, sy-vline,
  WA_KPZP0-UMREZ, sy-vline,
  WA_KPZP0-UMREN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KPZP0 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_KPZP0 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_KPZP0 INTO WA_KPZP0.


*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 PLNFL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KPZP0-PLNFL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP0-PLNFL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KPZP0-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP0-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNE
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_KPZP0-VORNE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP0-VORNE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KPZP0-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP0-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PLNME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KPZP0-PLNME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP0-PLNME.
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_KPZP0_STR, 
OBJNR TYPE STRING,
PLNFL TYPE STRING,
GJAHR TYPE STRING,
PERBL TYPE STRING,
VORNE TYPE STRING,
MEINH TYPE STRING,
AUFAK TYPE STRING,
LMVRG TYPE STRING,
XMVRG TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
PLNME TYPE STRING,
LMV001 TYPE STRING,
XMV001 TYPE STRING,
LMV002 TYPE STRING,
XMV002 TYPE STRING,
LMV003 TYPE STRING,
XMV003 TYPE STRING,
LMV004 TYPE STRING,
XMV004 TYPE STRING,
LMV005 TYPE STRING,
XMV005 TYPE STRING,
LMV006 TYPE STRING,
XMV006 TYPE STRING,
LMV007 TYPE STRING,
XMV007 TYPE STRING,
LMV008 TYPE STRING,
XMV008 TYPE STRING,
LMV009 TYPE STRING,
XMV009 TYPE STRING,
LMV010 TYPE STRING,
XMV010 TYPE STRING,
LMV011 TYPE STRING,
XMV011 TYPE STRING,
LMV012 TYPE STRING,
XMV012 TYPE STRING,
LMV013 TYPE STRING,
XMV013 TYPE STRING,
LMV014 TYPE STRING,
XMV014 TYPE STRING,
LMV015 TYPE STRING,
XMV015 TYPE STRING,
LMV016 TYPE STRING,
XMV016 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KPZP0_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_KPZP0_STR-OBJNR sy-vline 
WA_KPZP0_STR-PLNFL sy-vline 
WA_KPZP0_STR-GJAHR sy-vline 
WA_KPZP0_STR-PERBL sy-vline 
WA_KPZP0_STR-VORNE sy-vline 
WA_KPZP0_STR-MEINH sy-vline 
WA_KPZP0_STR-AUFAK sy-vline 
WA_KPZP0_STR-LMVRG sy-vline 
WA_KPZP0_STR-XMVRG sy-vline 
WA_KPZP0_STR-UMREZ sy-vline 
WA_KPZP0_STR-UMREN sy-vline 
WA_KPZP0_STR-PLNME sy-vline 
WA_KPZP0_STR-LMV001 sy-vline 
WA_KPZP0_STR-XMV001 sy-vline 
WA_KPZP0_STR-LMV002 sy-vline 
WA_KPZP0_STR-XMV002 sy-vline 
WA_KPZP0_STR-LMV003 sy-vline 
WA_KPZP0_STR-XMV003 sy-vline 
WA_KPZP0_STR-LMV004 sy-vline 
WA_KPZP0_STR-XMV004 sy-vline 
WA_KPZP0_STR-LMV005 sy-vline 
WA_KPZP0_STR-XMV005 sy-vline 
WA_KPZP0_STR-LMV006 sy-vline 
WA_KPZP0_STR-XMV006 sy-vline 
WA_KPZP0_STR-LMV007 sy-vline 
WA_KPZP0_STR-XMV007 sy-vline 
WA_KPZP0_STR-LMV008 sy-vline 
WA_KPZP0_STR-XMV008 sy-vline 
WA_KPZP0_STR-LMV009 sy-vline 
WA_KPZP0_STR-XMV009 sy-vline 
WA_KPZP0_STR-LMV010 sy-vline 
WA_KPZP0_STR-XMV010 sy-vline 
WA_KPZP0_STR-LMV011 sy-vline 
WA_KPZP0_STR-XMV011 sy-vline 
WA_KPZP0_STR-LMV012 sy-vline 
WA_KPZP0_STR-XMV012 sy-vline 
WA_KPZP0_STR-LMV013 sy-vline 
WA_KPZP0_STR-XMV013 sy-vline 
WA_KPZP0_STR-LMV014 sy-vline 
WA_KPZP0_STR-XMV014 sy-vline 
WA_KPZP0_STR-LMV015 sy-vline 
WA_KPZP0_STR-XMV015 sy-vline 
WA_KPZP0_STR-LMV016 sy-vline 
WA_KPZP0_STR-XMV016 sy-vline      INTO ld_text SEPARATED BY SPACE.

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