ABAP Select data from SAP table KPZP1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KPZP1 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 KPZP1. 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 KPZP1 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_KPZP1 TYPE STANDARD TABLE OF KPZP1,
      WA_KPZP1 TYPE KPZP1,
      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: <KPZP1> TYPE KPZP1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KPZP1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KPZP1
  INTO TABLE IT_KPZP1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KPZP1
*  INTO TABLE @DATA(IT_KPZP12).
*--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_KPZP1 INDEX 1 INTO DATA(WA_KPZP12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KPZP1 ASSIGNING <KPZP1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KPZP1>-OBJNR = 1.
<KPZP1>-PLNFL = 1.
<KPZP1>-INTAVO = 1.
<KPZP1>-EXTAVO = 1.
<KPZP1>-PLNKN = 1.

ENDLOOP.

LOOP AT IT_KPZP1 INTO WA_KPZP1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KPZP1-VORNE, sy-vline,
  WA_KPZP1-NXTZPI, sy-vline,
  WA_KPZP1-NXTZPE, sy-vline,
  WA_KPZP1-SCOBJ, sy-vline,
  WA_KPZP1-GJAHR, sy-vline,
  WA_KPZP1-PERIO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KPZP1 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_KPZP1 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_KPZP1 INTO WA_KPZP1.


*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_KPZP1-PLNFL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP1-PLNFL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field EXTAVO
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_KPZP1-EXTAVO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP1-EXTAVO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNE
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_KPZP1-VORNE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP1-VORNE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field NXTZPE
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_KPZP1-NXTZPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP1-NXTZPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KPZP1-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP1-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KPZP1-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP1-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PLNME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KPZP1-PLNME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPZP1-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_KPZP1_STR, 
OBJNR TYPE STRING,
PLNFL TYPE STRING,
INTAVO TYPE STRING,
EXTAVO TYPE STRING,
PLNKN TYPE STRING,
VORNE TYPE STRING,
NXTZPI TYPE STRING,
NXTZPE TYPE STRING,
SCOBJ TYPE STRING,
GJAHR TYPE STRING,
PERIO TYPE STRING,
MEINH TYPE STRING,
AUFAK TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
PLNME TYPE STRING,
LMGLFP TYPE STRING,
XMGLFP TYPE STRING,
XKUMLP TYPE STRING,
XPLALP TYPE STRING,
SMGLFP TYPE STRING,
SKUMLP TYPE STRING,
LMGVOP TYPE STRING,
XMGVOP TYPE STRING,
XKUMVP TYPE STRING,
XPLAVP TYPE STRING,
SMGVOP TYPE STRING,
SKUMVP TYPE STRING,
KZZPK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KPZP1_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_KPZP1_STR-OBJNR sy-vline 
WA_KPZP1_STR-PLNFL sy-vline 
WA_KPZP1_STR-INTAVO sy-vline 
WA_KPZP1_STR-EXTAVO sy-vline 
WA_KPZP1_STR-PLNKN sy-vline 
WA_KPZP1_STR-VORNE sy-vline 
WA_KPZP1_STR-NXTZPI sy-vline 
WA_KPZP1_STR-NXTZPE sy-vline 
WA_KPZP1_STR-SCOBJ sy-vline 
WA_KPZP1_STR-GJAHR sy-vline 
WA_KPZP1_STR-PERIO sy-vline 
WA_KPZP1_STR-MEINH sy-vline 
WA_KPZP1_STR-AUFAK sy-vline 
WA_KPZP1_STR-UMREZ sy-vline 
WA_KPZP1_STR-UMREN sy-vline 
WA_KPZP1_STR-PLNME sy-vline 
WA_KPZP1_STR-LMGLFP sy-vline 
WA_KPZP1_STR-XMGLFP sy-vline 
WA_KPZP1_STR-XKUMLP sy-vline 
WA_KPZP1_STR-XPLALP sy-vline 
WA_KPZP1_STR-SMGLFP sy-vline 
WA_KPZP1_STR-SKUMLP sy-vline 
WA_KPZP1_STR-LMGVOP sy-vline 
WA_KPZP1_STR-XMGVOP sy-vline 
WA_KPZP1_STR-XKUMVP sy-vline 
WA_KPZP1_STR-XPLAVP sy-vline 
WA_KPZP1_STR-SMGVOP sy-vline 
WA_KPZP1_STR-SKUMVP sy-vline 
WA_KPZP1_STR-KZZPK sy-vline      INTO ld_text SEPARATED BY SPACE.

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