ABAP Select data from SAP table FKKINV_INVITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKINV_INVITEM
*  INTO TABLE @DATA(IT_FKKINV_INVITEM2).
*--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_FKKINV_INVITEM INDEX 1 INTO DATA(WA_FKKINV_INVITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKINV_INVITEM>-MANDT = 1.
<FKKINV_INVITEM>-INVDOCNO = 1.
<FKKINV_INVITEM>-INVDOCITEM = 1.
<FKKINV_INVITEM>-ITEMTYPE = 1.
<FKKINV_INVITEM>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKINV_INVITEM-SPART, sy-vline,
  WA_FKKINV_INVITEM-VTREF, sy-vline,
  WA_FKKINV_INVITEM-VTPOS, sy-vline,
  WA_FKKINV_INVITEM-SUBAP, sy-vline,
  WA_FKKINV_INVITEM-GPART_A, sy-vline,
  WA_FKKINV_INVITEM-VKONT_A, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKINV_INVITEM 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_FKKINV_INVITEM 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_FKKINV_INVITEM INTO WA_FKKINV_INVITEM.


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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field QTY_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FKKINV_INVITEM-QTY_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKINV_INVITEM-QTY_UNIT.
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_FKKINV_INVITEM_STR, 
MANDT TYPE STRING,
INVDOCNO TYPE STRING,
INVDOCITEM TYPE STRING,
ITEMTYPE TYPE STRING,
BUKRS TYPE STRING,
SPART TYPE STRING,
VTREF TYPE STRING,
VTPOS TYPE STRING,
SUBAP TYPE STRING,
GPART_A TYPE STRING,
VKONT_A TYPE STRING,
GPVKT_A_CAT TYPE STRING,
HVORG TYPE STRING,
TVORG TYPE STRING,
ITEM_SIMULATED TYPE STRING,
REVERSALITEM TYPE STRING,
CORRCAT TYPE STRING,
TOTALREL TYPE STRING,
POSTREL TYPE STRING,
NOT_BPREL TYPE STRING,
PRINTREL TYPE STRING,
PRINT_SUBSTITUTE TYPE STRING,
WAERS TYPE STRING,
BETRW TYPE STRING,
SRCDOC_CURR TYPE STRING,
SRCDOC_AMT TYPE STRING,
CURRC_GROUP TYPE STRING,
KOFIZ TYPE STRING,
BUPLA TYPE STRING,
GSBER TYPE STRING,
TAX_INCLUDED TYPE STRING,
TAX_DET_TYPE TYPE STRING,
TAXGR TYPE STRING,
STRKZ TYPE STRING,
MWSKZ TYPE STRING,
ERMWSKZ TYPE STRING,
TXJCD TYPE STRING,
KTOSL TYPE STRING,
KSCHL TYPE STRING,
TAX_PERC TYPE STRING,
TAX_COUNTRY TYPE STRING,
TXDAT TYPE STRING,
SBASW TYPE STRING,
SBETW TYPE STRING,
STTAX TYPE STRING,
QSSKZ TYPE STRING,
XANZA TYPE STRING,
STAKZ TYPE STRING,
OFFSET_CAT TYPE STRING,
OFFSET_PROC TYPE STRING,
OFFSET_ACTION TYPE STRING,
OFFSET_INVGR TYPE STRING,
DEFREV_STAT TYPE STRING,
RAREL TYPE STRING,
RA_INVGR TYPE STRING,
SERVICE_TYPE TYPE STRING,
BILLAC_TYPE TYPE STRING,
PREPAID TYPE STRING,
MEINS TYPE STRING,
MENGE TYPE STRING,
FAEDN TYPE STRING,
FAEDS TYPE STRING,
SKTPZ TYPE STRING,
XSTUND TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
CADOCTYPE TYPE STRING,
OPBEL TYPE STRING,
PSGRP TYPE STRING,
INVGR TYPE STRING,
AUGBL TYPE STRING,
AUGBW TYPE STRING,
ITEM_CRMET TYPE STRING,
INV_FUNCTION TYPE STRING,
SRCDOCCAT TYPE STRING,
SRCDOCNO TYPE STRING,
SRCITEMCAT TYPE STRING,
SRCDOCITEM TYPE STRING,
DISCKEY TYPE STRING,
DISCKEY_VERSNO TYPE STRING,
DUMMY_INVDOC_I_INCL_EEW_PS TYPE STRING,
TOTALREL_POSTITEM TYPE STRING,
TAX_INCL_PRINTITEM TYPE STRING,
TAX_GROUP TYPE STRING,
TXEXK TYPE STRING,
STCEG TYPE STRING,
PY_GROUP TYPE STRING,
SRC_GROUP TYPE STRING,
OFFSET_REFID TYPE STRING,
DEFREV_CAT TYPE STRING,
DEFREV_PDATE TYPE STRING,
DEFREV_ACTION TYPE STRING,
DEFREV_CTYPE TYPE STRING,
DEFREV_ASSKY TYPE STRING,
DEFREV_REF03 TYPE STRING,
XPRIMARY TYPE STRING,
PSCAT TYPE STRING,
DITTYPE TYPE STRING,
QTY_UNIT TYPE STRING,
QUANTITY TYPE STRING,
INVDOCI_TMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKINV_INVITEM_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_FKKINV_INVITEM_STR-MANDT sy-vline 
WA_FKKINV_INVITEM_STR-INVDOCNO sy-vline 
WA_FKKINV_INVITEM_STR-INVDOCITEM sy-vline 
WA_FKKINV_INVITEM_STR-ITEMTYPE sy-vline 
WA_FKKINV_INVITEM_STR-BUKRS sy-vline 
WA_FKKINV_INVITEM_STR-SPART sy-vline 
WA_FKKINV_INVITEM_STR-VTREF sy-vline 
WA_FKKINV_INVITEM_STR-VTPOS sy-vline 
WA_FKKINV_INVITEM_STR-SUBAP sy-vline 
WA_FKKINV_INVITEM_STR-GPART_A sy-vline 
WA_FKKINV_INVITEM_STR-VKONT_A sy-vline 
WA_FKKINV_INVITEM_STR-GPVKT_A_CAT sy-vline 
WA_FKKINV_INVITEM_STR-HVORG sy-vline 
WA_FKKINV_INVITEM_STR-TVORG sy-vline 
WA_FKKINV_INVITEM_STR-ITEM_SIMULATED sy-vline 
WA_FKKINV_INVITEM_STR-REVERSALITEM sy-vline 
WA_FKKINV_INVITEM_STR-CORRCAT sy-vline 
WA_FKKINV_INVITEM_STR-TOTALREL sy-vline 
WA_FKKINV_INVITEM_STR-POSTREL sy-vline 
WA_FKKINV_INVITEM_STR-NOT_BPREL sy-vline 
WA_FKKINV_INVITEM_STR-PRINTREL sy-vline 
WA_FKKINV_INVITEM_STR-PRINT_SUBSTITUTE sy-vline 
WA_FKKINV_INVITEM_STR-WAERS sy-vline 
WA_FKKINV_INVITEM_STR-BETRW sy-vline 
WA_FKKINV_INVITEM_STR-SRCDOC_CURR sy-vline 
WA_FKKINV_INVITEM_STR-SRCDOC_AMT sy-vline 
WA_FKKINV_INVITEM_STR-CURRC_GROUP sy-vline 
WA_FKKINV_INVITEM_STR-KOFIZ sy-vline 
WA_FKKINV_INVITEM_STR-BUPLA sy-vline 
WA_FKKINV_INVITEM_STR-GSBER sy-vline 
WA_FKKINV_INVITEM_STR-TAX_INCLUDED sy-vline 
WA_FKKINV_INVITEM_STR-TAX_DET_TYPE sy-vline 
WA_FKKINV_INVITEM_STR-TAXGR sy-vline 
WA_FKKINV_INVITEM_STR-STRKZ sy-vline 
WA_FKKINV_INVITEM_STR-MWSKZ sy-vline 
WA_FKKINV_INVITEM_STR-ERMWSKZ sy-vline 
WA_FKKINV_INVITEM_STR-TXJCD sy-vline 
WA_FKKINV_INVITEM_STR-KTOSL sy-vline 
WA_FKKINV_INVITEM_STR-KSCHL sy-vline 
WA_FKKINV_INVITEM_STR-TAX_PERC sy-vline 
WA_FKKINV_INVITEM_STR-TAX_COUNTRY sy-vline 
WA_FKKINV_INVITEM_STR-TXDAT sy-vline 
WA_FKKINV_INVITEM_STR-SBASW sy-vline 
WA_FKKINV_INVITEM_STR-SBETW sy-vline 
WA_FKKINV_INVITEM_STR-STTAX sy-vline 
WA_FKKINV_INVITEM_STR-QSSKZ sy-vline 
WA_FKKINV_INVITEM_STR-XANZA sy-vline 
WA_FKKINV_INVITEM_STR-STAKZ sy-vline 
WA_FKKINV_INVITEM_STR-OFFSET_CAT sy-vline 
WA_FKKINV_INVITEM_STR-OFFSET_PROC sy-vline 
WA_FKKINV_INVITEM_STR-OFFSET_ACTION sy-vline 
WA_FKKINV_INVITEM_STR-OFFSET_INVGR sy-vline 
WA_FKKINV_INVITEM_STR-DEFREV_STAT sy-vline 
WA_FKKINV_INVITEM_STR-RAREL sy-vline 
WA_FKKINV_INVITEM_STR-RA_INVGR sy-vline 
WA_FKKINV_INVITEM_STR-SERVICE_TYPE sy-vline 
WA_FKKINV_INVITEM_STR-BILLAC_TYPE sy-vline 
WA_FKKINV_INVITEM_STR-PREPAID sy-vline 
WA_FKKINV_INVITEM_STR-MEINS sy-vline 
WA_FKKINV_INVITEM_STR-MENGE sy-vline 
WA_FKKINV_INVITEM_STR-FAEDN sy-vline 
WA_FKKINV_INVITEM_STR-FAEDS sy-vline 
WA_FKKINV_INVITEM_STR-SKTPZ sy-vline 
WA_FKKINV_INVITEM_STR-XSTUND sy-vline 
WA_FKKINV_INVITEM_STR-DATE_FROM sy-vline 
WA_FKKINV_INVITEM_STR-DATE_TO sy-vline 
WA_FKKINV_INVITEM_STR-CADOCTYPE sy-vline 
WA_FKKINV_INVITEM_STR-OPBEL sy-vline 
WA_FKKINV_INVITEM_STR-PSGRP sy-vline 
WA_FKKINV_INVITEM_STR-INVGR sy-vline 
WA_FKKINV_INVITEM_STR-AUGBL sy-vline 
WA_FKKINV_INVITEM_STR-AUGBW sy-vline 
WA_FKKINV_INVITEM_STR-ITEM_CRMET sy-vline 
WA_FKKINV_INVITEM_STR-INV_FUNCTION sy-vline 
WA_FKKINV_INVITEM_STR-SRCDOCCAT sy-vline 
WA_FKKINV_INVITEM_STR-SRCDOCNO sy-vline 
WA_FKKINV_INVITEM_STR-SRCITEMCAT sy-vline 
WA_FKKINV_INVITEM_STR-SRCDOCITEM sy-vline 
WA_FKKINV_INVITEM_STR-DISCKEY sy-vline 
WA_FKKINV_INVITEM_STR-DISCKEY_VERSNO sy-vline 
WA_FKKINV_INVITEM_STR-DUMMY_INVDOC_I_INCL_EEW_PS sy-vline 
WA_FKKINV_INVITEM_STR-TOTALREL_POSTITEM sy-vline 
WA_FKKINV_INVITEM_STR-TAX_INCL_PRINTITEM sy-vline 
WA_FKKINV_INVITEM_STR-TAX_GROUP sy-vline 
WA_FKKINV_INVITEM_STR-TXEXK sy-vline 
WA_FKKINV_INVITEM_STR-STCEG sy-vline 
WA_FKKINV_INVITEM_STR-PY_GROUP sy-vline 
WA_FKKINV_INVITEM_STR-SRC_GROUP sy-vline 
WA_FKKINV_INVITEM_STR-OFFSET_REFID sy-vline 
WA_FKKINV_INVITEM_STR-DEFREV_CAT sy-vline 
WA_FKKINV_INVITEM_STR-DEFREV_PDATE sy-vline 
WA_FKKINV_INVITEM_STR-DEFREV_ACTION sy-vline 
WA_FKKINV_INVITEM_STR-DEFREV_CTYPE sy-vline 
WA_FKKINV_INVITEM_STR-DEFREV_ASSKY sy-vline 
WA_FKKINV_INVITEM_STR-DEFREV_REF03 sy-vline 
WA_FKKINV_INVITEM_STR-XPRIMARY sy-vline 
WA_FKKINV_INVITEM_STR-PSCAT sy-vline 
WA_FKKINV_INVITEM_STR-DITTYPE sy-vline 
WA_FKKINV_INVITEM_STR-QTY_UNIT sy-vline 
WA_FKKINV_INVITEM_STR-QUANTITY sy-vline 
WA_FKKINV_INVITEM_STR-INVDOCI_TMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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