ABAP Select data from SAP table GTR_FI_INVDOC_I into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GTR_FI_INVDOC_I
*  INTO TABLE @DATA(IT_GTR_FI_INVDOC_I2).
*--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_GTR_FI_INVDOC_I INDEX 1 INTO DATA(WA_GTR_FI_INVDOC_I2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GTR_FI_INVDOC_I>-BILLDOCNO = 1.
<GTR_FI_INVDOC_I>-BILLDOCITEM = 1.
<GTR_FI_INVDOC_I>-BILLDOCITEM_REF = 1.
<GTR_FI_INVDOC_I>-ITEM_GUID = 1.
<GTR_FI_INVDOC_I>-FLG_REVERS_ITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GTR_FI_INVDOC_I-DUE_DATE, sy-vline,
  WA_GTR_FI_INVDOC_I-WAERS, sy-vline,
  WA_GTR_FI_INVDOC_I-BETRW, sy-vline,
  WA_GTR_FI_INVDOC_I-PAYMENT_TYPE, sy-vline,
  WA_GTR_FI_INVDOC_I-CLASSIFICATION, sy-vline,
  WA_GTR_FI_INVDOC_I-BUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GTR_FI_INVDOC_I 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_GTR_FI_INVDOC_I 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_GTR_FI_INVDOC_I INTO WA_GTR_FI_INVDOC_I.


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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field REFDOC_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GTR_FI_INVDOC_I-REFDOC_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GTR_FI_INVDOC_I-REFDOC_ID.
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_GTR_FI_INVDOC_I_STR, 
BILLDOCNO TYPE STRING,
BILLDOCITEM TYPE STRING,
BILLDOCITEM_REF TYPE STRING,
ITEM_GUID TYPE STRING,
FLG_REVERS_ITEM TYPE STRING,
DUE_DATE TYPE STRING,
WAERS TYPE STRING,
BETRW TYPE STRING,
PAYMENT_TYPE TYPE STRING,
CLASSIFICATION TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
HKONT TYPE STRING,
SEGMENT TYPE STRING,
PRCTR TYPE STRING,
PAOBJNR TYPE STRING,
AUFNR TYPE STRING,
PS_PSP_PNR TYPE STRING,
NPLNR TYPE STRING,
KOSTL TYPE STRING,
BUPLA TYPE STRING,
VBUND TYPE STRING,
FIKRS TYPE STRING,
FIPEX TYPE STRING,
FISTL TYPE STRING,
FONDS TYPE STRING,
FKBER TYPE STRING,
MEASURE TYPE STRING,
GRANT_NBR TYPE STRING,
KBLNR TYPE STRING,
KBLPOS TYPE STRING,
REFDOC_ID TYPE STRING,
REFDOC_OBJTYPE TYPE STRING,
CRMOBJ TYPE STRING,
BRI_GUID TYPE STRING,
BUDGET_PD TYPE STRING,
EXPENSE_TYPE TYPE STRING,
EMGPA_GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GTR_FI_INVDOC_I_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_GTR_FI_INVDOC_I_STR-BILLDOCNO sy-vline 
WA_GTR_FI_INVDOC_I_STR-BILLDOCITEM sy-vline 
WA_GTR_FI_INVDOC_I_STR-BILLDOCITEM_REF sy-vline 
WA_GTR_FI_INVDOC_I_STR-ITEM_GUID sy-vline 
WA_GTR_FI_INVDOC_I_STR-FLG_REVERS_ITEM sy-vline 
WA_GTR_FI_INVDOC_I_STR-DUE_DATE sy-vline 
WA_GTR_FI_INVDOC_I_STR-WAERS sy-vline 
WA_GTR_FI_INVDOC_I_STR-BETRW sy-vline 
WA_GTR_FI_INVDOC_I_STR-PAYMENT_TYPE sy-vline 
WA_GTR_FI_INVDOC_I_STR-CLASSIFICATION sy-vline 
WA_GTR_FI_INVDOC_I_STR-BUKRS sy-vline 
WA_GTR_FI_INVDOC_I_STR-GSBER sy-vline 
WA_GTR_FI_INVDOC_I_STR-HKONT sy-vline 
WA_GTR_FI_INVDOC_I_STR-SEGMENT sy-vline 
WA_GTR_FI_INVDOC_I_STR-PRCTR sy-vline 
WA_GTR_FI_INVDOC_I_STR-PAOBJNR sy-vline 
WA_GTR_FI_INVDOC_I_STR-AUFNR sy-vline 
WA_GTR_FI_INVDOC_I_STR-PS_PSP_PNR sy-vline 
WA_GTR_FI_INVDOC_I_STR-NPLNR sy-vline 
WA_GTR_FI_INVDOC_I_STR-KOSTL sy-vline 
WA_GTR_FI_INVDOC_I_STR-BUPLA sy-vline 
WA_GTR_FI_INVDOC_I_STR-VBUND sy-vline 
WA_GTR_FI_INVDOC_I_STR-FIKRS sy-vline 
WA_GTR_FI_INVDOC_I_STR-FIPEX sy-vline 
WA_GTR_FI_INVDOC_I_STR-FISTL sy-vline 
WA_GTR_FI_INVDOC_I_STR-FONDS sy-vline 
WA_GTR_FI_INVDOC_I_STR-FKBER sy-vline 
WA_GTR_FI_INVDOC_I_STR-MEASURE sy-vline 
WA_GTR_FI_INVDOC_I_STR-GRANT_NBR sy-vline 
WA_GTR_FI_INVDOC_I_STR-KBLNR sy-vline 
WA_GTR_FI_INVDOC_I_STR-KBLPOS sy-vline 
WA_GTR_FI_INVDOC_I_STR-REFDOC_ID sy-vline 
WA_GTR_FI_INVDOC_I_STR-REFDOC_OBJTYPE sy-vline 
WA_GTR_FI_INVDOC_I_STR-CRMOBJ sy-vline 
WA_GTR_FI_INVDOC_I_STR-BRI_GUID sy-vline 
WA_GTR_FI_INVDOC_I_STR-BUDGET_PD sy-vline 
WA_GTR_FI_INVDOC_I_STR-EXPENSE_TYPE sy-vline 
WA_GTR_FI_INVDOC_I_STR-EMGPA_GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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