ABAP Select data from SAP table FMFG_EXCLUDE_INVOICE_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMFG_EXCLUDE_INVOICE_FIELDS
*  INTO TABLE @DATA(IT_FMFG_EXCLUDE_INVOICE_FIELDS2).
*--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_FMFG_EXCLUDE_INVOICE_FIELDS INDEX 1 INTO DATA(WA_FMFG_EXCLUDE_INVOICE_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMFG_EXCLUDE_INVOICE_FIELDS>-BUKRS = 1.
<FMFG_EXCLUDE_INVOICE_FIELDS>-GJAHR = 1.
<FMFG_EXCLUDE_INVOICE_FIELDS>-BELNR = 1.
<FMFG_EXCLUDE_INVOICE_FIELDS>-BUDAT = 1.
<FMFG_EXCLUDE_INVOICE_FIELDS>-BLDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMFG_EXCLUDE_INVOICE_FIELDS-CPUDT, sy-vline,
  WA_FMFG_EXCLUDE_INVOICE_FIELDS-XBLNR, sy-vline,
  WA_FMFG_EXCLUDE_INVOICE_FIELDS-BLART, sy-vline,
  WA_FMFG_EXCLUDE_INVOICE_FIELDS-EXCLUDE_FLAG, sy-vline,
  WA_FMFG_EXCLUDE_INVOICE_FIELDS-AWTYP, sy-vline,
  WA_FMFG_EXCLUDE_INVOICE_FIELDS-AWKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMFG_EXCLUDE_INVOICE_FIELDS 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_FMFG_EXCLUDE_INVOICE_FIELDS 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_FMFG_EXCLUDE_INVOICE_FIELDS INTO WA_FMFG_EXCLUDE_INVOICE_FIELDS.


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

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

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

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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_FMFG_EXCLUDE_INVOICE_FIELDS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMFG_EXCLUDE_INVOICE_FIELDS-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit FIPEX, internal->external for field FIPEX
CALL FUNCTION 'CONVERSION_EXIT_FIPEX_OUTPUT'
  EXPORTING
    input =                      WA_FMFG_EXCLUDE_INVOICE_FIELDS-FIPEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMFG_EXCLUDE_INVOICE_FIELDS-FIPEX.
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_FMFG_EXCLUDE_INVOICE_FIELDS_STR, 
BUKRS TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
CPUDT TYPE STRING,
XBLNR TYPE STRING,
BLART TYPE STRING,
EXCLUDE_FLAG TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
AWSYS TYPE STRING,
WAERS TYPE STRING,
KOART TYPE STRING,
LIFNR TYPE STRING,
BUZEI TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
MATNR TYPE STRING,
FIPOS TYPE STRING,
HKONT TYPE STRING,
FIPEX TYPE STRING,
WRBTR TYPE STRING,
SHKZG TYPE STRING,
VENDOR_BUZEI TYPE STRING,
NEW_EXCLUDE_LINE_IND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMFG_EXCLUDE_INVOICE_FIELDS_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_FMFG_EXCLUDE_INVOICE_FIELDS_STR-BUKRS sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-GJAHR sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-BELNR sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-BUDAT sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-BLDAT sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-CPUDT sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-XBLNR sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-BLART sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-EXCLUDE_FLAG sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-AWTYP sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-AWKEY sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-AWSYS sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-WAERS sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-KOART sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-LIFNR sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-BUZEI sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-EBELN sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-EBELP sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-MATNR sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-FIPOS sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-HKONT sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-FIPEX sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-WRBTR sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-SHKZG sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-VENDOR_BUZEI sy-vline 
WA_FMFG_EXCLUDE_INVOICE_FIELDS_STR-NEW_EXCLUDE_LINE_IND sy-vline      INTO ld_text SEPARATED BY SPACE.

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