ABAP Select data from SAP table PKPR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKPR
*  INTO TABLE @DATA(IT_PKPR2).
*--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_PKPR INDEX 1 INTO DATA(WA_PKPR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKPR>-MANDT = 1.
<PKPR>-PKNUM = 1.
<PKPR>-KCEDT = 1.
<PKPR>-NEXDT = 1.
<PKPR>-NEXAZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKPR-NEXMG, sy-vline,
  WA_PKPR-NEXTRI, sy-vline,
  WA_PKPR-KCVDT, sy-vline,
  WA_PKPR-KCBDT, sy-vline,
  WA_PKPR-PCMAA, sy-vline,
  WA_PKPR-PCMAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKPR 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_PKPR 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_PKPR INTO WA_PKPR.


*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_PKPR-PKNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKPR-PKNUM.
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_PKPR_STR, 
MANDT TYPE STRING,
PKNUM TYPE STRING,
KCEDT TYPE STRING,
NEXDT TYPE STRING,
NEXAZ TYPE STRING,
NEXMG TYPE STRING,
NEXTRI TYPE STRING,
KCVDT TYPE STRING,
KCBDT TYPE STRING,
PCMAA TYPE STRING,
PCMAM TYPE STRING,
PCMIA TYPE STRING,
PCMIM TYPE STRING,
PCMAA_RFT TYPE STRING,
PCMAM_RFT TYPE STRING,
PCMAA_WT TYPE STRING,
PCMAM_WT TYPE STRING,
PCMAA_ITT TYPE STRING,
PCMAM_ITT TYPE STRING,
PCMAA_PIT TYPE STRING,
PCMAM_PIT TYPE STRING,
PCMAA_CALBUF TYPE STRING,
PCMAM_CALBUF TYPE STRING,
PCMAA_VOLAT TYPE STRING,
PCMAM_VOLAT TYPE STRING,
PCMAA_DMBUF TYPE STRING,
PCMAM_DMBUF TYPE STRING,
PCMAA_SUPBUF TYPE STRING,
PCMAM_SUPBUF TYPE STRING,
PCMAA_NOPARA TYPE STRING,
PCMAM_NOPARA TYPE STRING,
PCMAA_SFC TYPE STRING,
PCMAM_SFC TYPE STRING,
PCMAA_CAPABUF TYPE STRING,
PCMAM_CAPABUF TYPE STRING,
CAPA_WRKCT TYPE STRING,
TRIGGR TYPE STRING,
CAPA_UTL_T TYPE STRING,
CAPA_UTL_P TYPE STRING,
CAPA_UTL_S TYPE STRING,
KIGDAYS TYPE STRING,
PLSCN TYPE STRING,
PCMAA_EXIT TYPE STRING,
PCMAM_EXIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKPR_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_PKPR_STR-MANDT sy-vline 
WA_PKPR_STR-PKNUM sy-vline 
WA_PKPR_STR-KCEDT sy-vline 
WA_PKPR_STR-NEXDT sy-vline 
WA_PKPR_STR-NEXAZ sy-vline 
WA_PKPR_STR-NEXMG sy-vline 
WA_PKPR_STR-NEXTRI sy-vline 
WA_PKPR_STR-KCVDT sy-vline 
WA_PKPR_STR-KCBDT sy-vline 
WA_PKPR_STR-PCMAA sy-vline 
WA_PKPR_STR-PCMAM sy-vline 
WA_PKPR_STR-PCMIA sy-vline 
WA_PKPR_STR-PCMIM sy-vline 
WA_PKPR_STR-PCMAA_RFT sy-vline 
WA_PKPR_STR-PCMAM_RFT sy-vline 
WA_PKPR_STR-PCMAA_WT sy-vline 
WA_PKPR_STR-PCMAM_WT sy-vline 
WA_PKPR_STR-PCMAA_ITT sy-vline 
WA_PKPR_STR-PCMAM_ITT sy-vline 
WA_PKPR_STR-PCMAA_PIT sy-vline 
WA_PKPR_STR-PCMAM_PIT sy-vline 
WA_PKPR_STR-PCMAA_CALBUF sy-vline 
WA_PKPR_STR-PCMAM_CALBUF sy-vline 
WA_PKPR_STR-PCMAA_VOLAT sy-vline 
WA_PKPR_STR-PCMAM_VOLAT sy-vline 
WA_PKPR_STR-PCMAA_DMBUF sy-vline 
WA_PKPR_STR-PCMAM_DMBUF sy-vline 
WA_PKPR_STR-PCMAA_SUPBUF sy-vline 
WA_PKPR_STR-PCMAM_SUPBUF sy-vline 
WA_PKPR_STR-PCMAA_NOPARA sy-vline 
WA_PKPR_STR-PCMAM_NOPARA sy-vline 
WA_PKPR_STR-PCMAA_SFC sy-vline 
WA_PKPR_STR-PCMAM_SFC sy-vline 
WA_PKPR_STR-PCMAA_CAPABUF sy-vline 
WA_PKPR_STR-PCMAM_CAPABUF sy-vline 
WA_PKPR_STR-CAPA_WRKCT sy-vline 
WA_PKPR_STR-TRIGGR sy-vline 
WA_PKPR_STR-CAPA_UTL_T sy-vline 
WA_PKPR_STR-CAPA_UTL_P sy-vline 
WA_PKPR_STR-CAPA_UTL_S sy-vline 
WA_PKPR_STR-KIGDAYS sy-vline 
WA_PKPR_STR-PLSCN sy-vline 
WA_PKPR_STR-PCMAA_EXIT sy-vline 
WA_PKPR_STR-PCMAM_EXIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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