ABAP Select data from SAP table PKTMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKTMP
*  INTO TABLE @DATA(IT_PKTMP2).
*--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_PKTMP INDEX 1 INTO DATA(WA_PKTMP2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKTMP-SAEDT, sy-vline,
  WA_PKTMP-SAEUZ, sy-vline,
  WA_PKTMP-SADT2, sy-vline,
  WA_PKTMP-SAUZ2, sy-vline,
  WA_PKTMP-PLNUM, sy-vline,
  WA_PKTMP-AUFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKTMP 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_PKTMP 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_PKTMP INTO WA_PKTMP.


*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_PKTMP-PKNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKTMP-PKNUM.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKTMP-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKTMP-EBELN.
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_PKTMP_STR, 
MANDT 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,
PLNUM TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ETENR TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
TBNUM TYPE STRING,
TBPOS TYPE STRING,
SPKKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKTMP_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_PKTMP_STR-MANDT sy-vline 
WA_PKTMP_STR-PKNUM sy-vline 
WA_PKTMP_STR-PKPOS sy-vline 
WA_PKTMP_STR-PKBST sy-vline 
WA_PKTMP_STR-PKIMG sy-vline 
WA_PKTMP_STR-SAEDT sy-vline 
WA_PKTMP_STR-SAEUZ sy-vline 
WA_PKTMP_STR-SADT2 sy-vline 
WA_PKTMP_STR-SAUZ2 sy-vline 
WA_PKTMP_STR-PLNUM sy-vline 
WA_PKTMP_STR-AUFNR sy-vline 
WA_PKTMP_STR-POSNR sy-vline 
WA_PKTMP_STR-EBELN sy-vline 
WA_PKTMP_STR-EBELP sy-vline 
WA_PKTMP_STR-ETENR sy-vline 
WA_PKTMP_STR-RSNUM sy-vline 
WA_PKTMP_STR-RSPOS sy-vline 
WA_PKTMP_STR-TBNUM sy-vline 
WA_PKTMP_STR-TBPOS sy-vline 
WA_PKTMP_STR-SPKKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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