ABAP Select data from SAP table PKPS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKPS
*  INTO TABLE @DATA(IT_PKPS2).
*--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_PKPS INDEX 1 INTO DATA(WA_PKPS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKPS>-MANDT = 1.
<PKPS>-PKKEY = 1.
<PKPS>-PKNUM = 1.
<PKPS>-PKPOS = 1.
<PKPS>-PKBST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKPS-PKIMG, sy-vline,
  WA_PKPS-SAEDT, sy-vline,
  WA_PKPS-SAEUZ, sy-vline,
  WA_PKPS-SADT2, sy-vline,
  WA_PKPS-SAUZ2, sy-vline,
  WA_PKPS-LASTCHANGE_DATETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKPS 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_PKPS 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_PKPS INTO WA_PKPS.


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

*Conversion exit ALPHA, internal->external for field PLNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKPS-PLNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPS-PLNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKPS-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPS-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKPS-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPS-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKPS-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPS-MBLNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PABNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKPS-PABNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPS-PABNUM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKPS-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPS-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field EWM_TANUM
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_PKPS-EWM_TANUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPS-EWM_TANUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field EWM_GM_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_PKPS-EWM_GM_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPS-EWM_GM_DOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field EWM_GM_DOC_ITEM
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_PKPS-EWM_GM_DOC_ITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPS-EWM_GM_DOC_ITEM.
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_PKPS_STR, 
MANDT TYPE STRING,
PKKEY TYPE STRING,
PKNUM TYPE STRING,
PKPOS TYPE STRING,
PKBST TYPE STRING,
PKIMG TYPE STRING,
SAEDT TYPE STRING,
SAEUZ TYPE STRING,
SADT2 TYPE STRING,
SAUZ2 TYPE STRING,
LASTCHANGE_DATETIME TYPE STRING,
PLNUM TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
BSTYP TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ETENR TYPE STRING,
DUMMY_KANBAN_CTN_INCL_EEW_PS TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
TBNUM TYPE STRING,
TBPOS TYPE STRING,
SPKKZ TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
MBLPO TYPE STRING,
PKLKZ TYPE STRING,
PKBMG TYPE STRING,
PKBSA TYPE STRING,
PABNUM TYPE STRING,
PABPOS TYPE STRING,
PKGPZG TYPE STRING,
HDFLG TYPE STRING,
ETENS TYPE STRING,
ZPUNKT TYPE STRING,
PRTNR TYPE STRING,
VBELN TYPE STRING,
VBELP TYPE STRING,
EWM_LGNUM TYPE STRING,
EWM_TANUM TYPE STRING,
EWM_GM_DOC TYPE STRING,
EWM_GM_DOC_ITEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKPS_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_PKPS_STR-MANDT sy-vline 
WA_PKPS_STR-PKKEY sy-vline 
WA_PKPS_STR-PKNUM sy-vline 
WA_PKPS_STR-PKPOS sy-vline 
WA_PKPS_STR-PKBST sy-vline 
WA_PKPS_STR-PKIMG sy-vline 
WA_PKPS_STR-SAEDT sy-vline 
WA_PKPS_STR-SAEUZ sy-vline 
WA_PKPS_STR-SADT2 sy-vline 
WA_PKPS_STR-SAUZ2 sy-vline 
WA_PKPS_STR-LASTCHANGE_DATETIME sy-vline 
WA_PKPS_STR-PLNUM sy-vline 
WA_PKPS_STR-AUFNR sy-vline 
WA_PKPS_STR-POSNR sy-vline 
WA_PKPS_STR-BSTYP sy-vline 
WA_PKPS_STR-EBELN sy-vline 
WA_PKPS_STR-EBELP sy-vline 
WA_PKPS_STR-ETENR sy-vline 
WA_PKPS_STR-DUMMY_KANBAN_CTN_INCL_EEW_PS sy-vline 
WA_PKPS_STR-RSNUM sy-vline 
WA_PKPS_STR-RSPOS sy-vline 
WA_PKPS_STR-TBNUM sy-vline 
WA_PKPS_STR-TBPOS sy-vline 
WA_PKPS_STR-SPKKZ sy-vline 
WA_PKPS_STR-MBLNR sy-vline 
WA_PKPS_STR-MJAHR sy-vline 
WA_PKPS_STR-MBLPO sy-vline 
WA_PKPS_STR-PKLKZ sy-vline 
WA_PKPS_STR-PKBMG sy-vline 
WA_PKPS_STR-PKBSA sy-vline 
WA_PKPS_STR-PABNUM sy-vline 
WA_PKPS_STR-PABPOS sy-vline 
WA_PKPS_STR-PKGPZG sy-vline 
WA_PKPS_STR-HDFLG sy-vline 
WA_PKPS_STR-ETENS sy-vline 
WA_PKPS_STR-ZPUNKT sy-vline 
WA_PKPS_STR-PRTNR sy-vline 
WA_PKPS_STR-VBELN sy-vline 
WA_PKPS_STR-VBELP sy-vline 
WA_PKPS_STR-EWM_LGNUM sy-vline 
WA_PKPS_STR-EWM_TANUM sy-vline 
WA_PKPS_STR-EWM_GM_DOC sy-vline 
WA_PKPS_STR-EWM_GM_DOC_ITEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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