ABAP Select data from SAP table MCKONA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCKONA
*  INTO TABLE @DATA(IT_MCKONA2).
*--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_MCKONA INDEX 1 INTO DATA(WA_MCKONA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCKONA>-MANDT = 1.
<MCKONA>-KNUMA = 1.
<MCKONA>-KNUMH = 1.
<MCKONA>-KOPOS = 1.
<MCKONA>-LIFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCKONA-MWSKZ, sy-vline,
  WA_MCKONA-WERKS, sy-vline,
  WA_MCKONA-BOLIF, sy-vline,
  WA_MCKONA-MATKL, sy-vline,
  WA_MCKONA-EKORG, sy-vline,
  WA_MCKONA-EKGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCKONA 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_MCKONA 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_MCKONA INTO WA_MCKONA.


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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit EXCRT, internal->external for field AKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCKONA-AKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCKONA-AKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCKONA-KKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCKONA-KKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field STKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCKONA-STKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCKONA-STKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KKURSST
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCKONA-KKURSST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCKONA-KKURSST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KDKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCKONA-KDKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCKONA-KDKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KKURSKD
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MCKONA-KKURSKD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCKONA-KKURSKD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WKUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCKONA-WKUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCKONA-WKUNNR.
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_MCKONA_STR, 
MANDT TYPE STRING,
KNUMA TYPE STRING,
KNUMH TYPE STRING,
KOPOS TYPE STRING,
LIFNR TYPE STRING,
MWSKZ TYPE STRING,
WERKS TYPE STRING,
BOLIF TYPE STRING,
MATKL TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
DATBI TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
KUNRE TYPE STRING,
MENGEST TYPE STRING,
MENGE TYPE STRING,
KAWRTSTEK TYPE STRING,
BONBASTRE TYPE STRING,
KAWRTKDEK TYPE STRING,
BONBAKDRE TYPE STRING,
KAWRT TYPE STRING,
BONBA TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
VOLUM TYPE STRING,
ANZPU TYPE STRING,
AGWRT TYPE STRING,
AUWRT TYPE STRING,
RUWRT TYPE STRING,
RRWRT TYPE STRING,
ABSPW TYPE STRING,
KONWA TYPE STRING,
KONWS TYPE STRING,
MEINS TYPE STRING,
KONMS TYPE STRING,
GEWEI TYPE STRING,
VOLEH TYPE STRING,
PUNEI TYPE STRING,
BUDAT TYPE STRING,
BUKRS TYPE STRING,
HWAER TYPE STRING,
WAERS TYPE STRING,
WAERSST TYPE STRING,
WAERSKD TYPE STRING,
BLTYPN TYPE STRING,
BELNR TYPE STRING,
POSNR TYPE STRING,
ETENR TYPE STRING,
BLTYPF TYPE STRING,
BELNR_TO TYPE STRING,
POSNR_TO TYPE STRING,
ZEKKN TYPE STRING,
VGABE TYPE STRING,
GJAHR TYPE STRING,
BOBAS TYPE STRING,
STAFO TYPE STRING,
AKURS TYPE STRING,
KKURS TYPE STRING,
STKURS TYPE STRING,
KKURSST TYPE STRING,
KDKURS TYPE STRING,
KKURSKD TYPE STRING,
FSTORNO TYPE STRING,
FORZP TYPE STRING,
FORZPA TYPE STRING,
FOART TYPE STRING,
KRUEK TYPE STRING,
ABPAR TYPE STRING,
SEKORG TYPE STRING,
BZIRK TYPE STRING,
BTRKZ TYPE STRING,
EKSGB TYPE STRING,
ABTNR TYPE STRING,
WGRU2 TYPE STRING,
WGRU1 TYPE STRING,
LAND1 TYPE STRING,
WRKGR2 TYPE STRING,
WRKGR1 TYPE STRING,
WKUNNR TYPE STRING,
BBBNR TYPE STRING,
BBSNR TYPE STRING,
BUBKZ TYPE STRING,
ILNNR TYPE STRING,
DUMMYUSR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCKONA_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_MCKONA_STR-MANDT sy-vline 
WA_MCKONA_STR-KNUMA sy-vline 
WA_MCKONA_STR-KNUMH sy-vline 
WA_MCKONA_STR-KOPOS sy-vline 
WA_MCKONA_STR-LIFNR sy-vline 
WA_MCKONA_STR-MWSKZ sy-vline 
WA_MCKONA_STR-WERKS sy-vline 
WA_MCKONA_STR-BOLIF sy-vline 
WA_MCKONA_STR-MATKL sy-vline 
WA_MCKONA_STR-EKORG sy-vline 
WA_MCKONA_STR-EKGRP sy-vline 
WA_MCKONA_STR-DATBI sy-vline 
WA_MCKONA_STR-VKORG sy-vline 
WA_MCKONA_STR-VTWEG sy-vline 
WA_MCKONA_STR-SPART sy-vline 
WA_MCKONA_STR-KUNRE sy-vline 
WA_MCKONA_STR-MENGEST sy-vline 
WA_MCKONA_STR-MENGE sy-vline 
WA_MCKONA_STR-KAWRTSTEK sy-vline 
WA_MCKONA_STR-BONBASTRE sy-vline 
WA_MCKONA_STR-KAWRTKDEK sy-vline 
WA_MCKONA_STR-BONBAKDRE sy-vline 
WA_MCKONA_STR-KAWRT sy-vline 
WA_MCKONA_STR-BONBA sy-vline 
WA_MCKONA_STR-BRGEW sy-vline 
WA_MCKONA_STR-NTGEW sy-vline 
WA_MCKONA_STR-VOLUM sy-vline 
WA_MCKONA_STR-ANZPU sy-vline 
WA_MCKONA_STR-AGWRT sy-vline 
WA_MCKONA_STR-AUWRT sy-vline 
WA_MCKONA_STR-RUWRT sy-vline 
WA_MCKONA_STR-RRWRT sy-vline 
WA_MCKONA_STR-ABSPW sy-vline 
WA_MCKONA_STR-KONWA sy-vline 
WA_MCKONA_STR-KONWS sy-vline 
WA_MCKONA_STR-MEINS sy-vline 
WA_MCKONA_STR-KONMS sy-vline 
WA_MCKONA_STR-GEWEI sy-vline 
WA_MCKONA_STR-VOLEH sy-vline 
WA_MCKONA_STR-PUNEI sy-vline 
WA_MCKONA_STR-BUDAT sy-vline 
WA_MCKONA_STR-BUKRS sy-vline 
WA_MCKONA_STR-HWAER sy-vline 
WA_MCKONA_STR-WAERS sy-vline 
WA_MCKONA_STR-WAERSST sy-vline 
WA_MCKONA_STR-WAERSKD sy-vline 
WA_MCKONA_STR-BLTYPN sy-vline 
WA_MCKONA_STR-BELNR sy-vline 
WA_MCKONA_STR-POSNR sy-vline 
WA_MCKONA_STR-ETENR sy-vline 
WA_MCKONA_STR-BLTYPF sy-vline 
WA_MCKONA_STR-BELNR_TO sy-vline 
WA_MCKONA_STR-POSNR_TO sy-vline 
WA_MCKONA_STR-ZEKKN sy-vline 
WA_MCKONA_STR-VGABE sy-vline 
WA_MCKONA_STR-GJAHR sy-vline 
WA_MCKONA_STR-BOBAS sy-vline 
WA_MCKONA_STR-STAFO sy-vline 
WA_MCKONA_STR-AKURS sy-vline 
WA_MCKONA_STR-KKURS sy-vline 
WA_MCKONA_STR-STKURS sy-vline 
WA_MCKONA_STR-KKURSST sy-vline 
WA_MCKONA_STR-KDKURS sy-vline 
WA_MCKONA_STR-KKURSKD sy-vline 
WA_MCKONA_STR-FSTORNO sy-vline 
WA_MCKONA_STR-FORZP sy-vline 
WA_MCKONA_STR-FORZPA sy-vline 
WA_MCKONA_STR-FOART sy-vline 
WA_MCKONA_STR-KRUEK sy-vline 
WA_MCKONA_STR-ABPAR sy-vline 
WA_MCKONA_STR-SEKORG sy-vline 
WA_MCKONA_STR-BZIRK sy-vline 
WA_MCKONA_STR-BTRKZ sy-vline 
WA_MCKONA_STR-EKSGB sy-vline 
WA_MCKONA_STR-ABTNR sy-vline 
WA_MCKONA_STR-WGRU2 sy-vline 
WA_MCKONA_STR-WGRU1 sy-vline 
WA_MCKONA_STR-LAND1 sy-vline 
WA_MCKONA_STR-WRKGR2 sy-vline 
WA_MCKONA_STR-WRKGR1 sy-vline 
WA_MCKONA_STR-WKUNNR sy-vline 
WA_MCKONA_STR-BBBNR sy-vline 
WA_MCKONA_STR-BBSNR sy-vline 
WA_MCKONA_STR-BUBKZ sy-vline 
WA_MCKONA_STR-ILNNR sy-vline 
WA_MCKONA_STR-DUMMYUSR sy-vline      INTO ld_text SEPARATED BY SPACE.

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