ABAP Select data from SAP table PTKOI into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PTKOI 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 PTKOI. 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 PTKOI 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_PTKOI TYPE STANDARD TABLE OF PTKOI,
      WA_PTKOI TYPE PTKOI,
      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: <PTKOI> TYPE PTKOI.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTKOI
*  INTO TABLE @DATA(IT_PTKOI2).
*--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_PTKOI INDEX 1 INTO DATA(WA_PTKOI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTKOI>-PERNR = 1.
<PTKOI>-REINR = 1.
<PTKOI>-RFKNT = 1.
<PTKOI>-KOKEY = 1.
<PTKOI>-DATV1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTKOI-DATB1, sy-vline,
  WA_PTKOI-ANTRG, sy-vline,
  WA_PTKOI-ABREC, sy-vline,
  WA_PTKOI-TWAER, sy-vline,
  WA_PTKOI-ENDARKZ, sy-vline,
  WA_PTKOI-ANHBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTKOI 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_PTKOI 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_PTKOI INTO WA_PTKOI.


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

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

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

*Conversion exit ABPSP, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_PTKOI-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTKOI-POSNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_PTKOI-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTKOI-FIPOS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit FMCIL, internal->external for field FIPEX
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_PTKOI-FIPEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTKOI-FIPEX.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field KBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PTKOI-KBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTKOI-KBLNR.
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_PTKOI_STR, 
PERNR TYPE STRING,
REINR TYPE STRING,
RFKNT TYPE STRING,
KOKEY TYPE STRING,
DATV1 TYPE STRING,
DATB1 TYPE STRING,
ANTRG TYPE STRING,
ABREC TYPE STRING,
TWAER TYPE STRING,
ENDARKZ TYPE STRING,
ANHBTR TYPE STRING,
ABHBTR TYPE STRING,
ANWBTR TYPE STRING,
ABWBTR TYPE STRING,
SAKNR TYPE STRING,
BUKRS TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
NPLNR TYPE STRING,
VORNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
FISTL TYPE STRING,
FIPOS TYPE STRING,
GEBER TYPE STRING,
SGTXT TYPE STRING,
BUDGET_PERIOD TYPE STRING,
FKBER TYPE STRING,
GRANT_NBR TYPE STRING,
FIPEX TYPE STRING,
PRZNR TYPE STRING,
KBLNR TYPE STRING,
KBLPOS TYPE STRING,
ERLKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTKOI_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_PTKOI_STR-PERNR sy-vline 
WA_PTKOI_STR-REINR sy-vline 
WA_PTKOI_STR-RFKNT sy-vline 
WA_PTKOI_STR-KOKEY sy-vline 
WA_PTKOI_STR-DATV1 sy-vline 
WA_PTKOI_STR-DATB1 sy-vline 
WA_PTKOI_STR-ANTRG sy-vline 
WA_PTKOI_STR-ABREC sy-vline 
WA_PTKOI_STR-TWAER sy-vline 
WA_PTKOI_STR-ENDARKZ sy-vline 
WA_PTKOI_STR-ANHBTR sy-vline 
WA_PTKOI_STR-ABHBTR sy-vline 
WA_PTKOI_STR-ANWBTR sy-vline 
WA_PTKOI_STR-ABWBTR sy-vline 
WA_PTKOI_STR-SAKNR sy-vline 
WA_PTKOI_STR-BUKRS sy-vline 
WA_PTKOI_STR-KOKRS sy-vline 
WA_PTKOI_STR-KOSTL sy-vline 
WA_PTKOI_STR-AUFNR sy-vline 
WA_PTKOI_STR-POSNR sy-vline 
WA_PTKOI_STR-NPLNR sy-vline 
WA_PTKOI_STR-VORNR sy-vline 
WA_PTKOI_STR-KDAUF sy-vline 
WA_PTKOI_STR-KDPOS sy-vline 
WA_PTKOI_STR-FISTL sy-vline 
WA_PTKOI_STR-FIPOS sy-vline 
WA_PTKOI_STR-GEBER sy-vline 
WA_PTKOI_STR-SGTXT sy-vline 
WA_PTKOI_STR-BUDGET_PERIOD sy-vline 
WA_PTKOI_STR-FKBER sy-vline 
WA_PTKOI_STR-GRANT_NBR sy-vline 
WA_PTKOI_STR-FIPEX sy-vline 
WA_PTKOI_STR-PRZNR sy-vline 
WA_PTKOI_STR-KBLNR sy-vline 
WA_PTKOI_STR-KBLPOS sy-vline 
WA_PTKOI_STR-ERLKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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