ABAP Select data from SAP table INVOICING into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INVOICING
*  INTO TABLE @DATA(IT_INVOICING2).
*--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_INVOICING INDEX 1 INTO DATA(WA_INVOICING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INVOICING>-MANDT = 1.
<INVOICING>-EBELN = 1.
<INVOICING>-EBELP = 1.
<INVOICING>-BUKRS = 1.
<INVOICING>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INVOICING-FPLNR, sy-vline,
  WA_INVOICING-REPOS, sy-vline,
  WA_INVOICING-LOEKZ, sy-vline,
  WA_INVOICING-EREKZ, sy-vline,
  WA_INVOICING-XERSY, sy-vline,
  WA_INVOICING-MEMORY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INVOICING 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_INVOICING 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_INVOICING INTO WA_INVOICING.


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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_INVOICING-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INVOICING-MEINS.
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_INVOICING_STR, 
MANDT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
FPLNR TYPE STRING,
REPOS TYPE STRING,
LOEKZ TYPE STRING,
EREKZ TYPE STRING,
XERSY TYPE STRING,
MEMORY TYPE STRING,
LIFNR TYPE STRING,
TXZ01 TYPE STRING,
MENGE TYPE STRING,
MWSKZ TYPE STRING,
PSTYP TYPE STRING,
WEPOS TYPE STRING,
WEUNB TYPE STRING,
WEBRE TYPE STRING,
TXJCD TYPE STRING,
RETPO TYPE STRING,
FPLTR TYPE STRING,
FKDAT TYPE STRING,
FAREG TYPE STRING,
FAKWR TYPE STRING,
FAKSP TYPE STRING,
WAERS2 TYPE STRING,
WAERS TYPE STRING,
KUFIX TYPE STRING,
WKURS TYPE STRING,
ZTERM TYPE STRING,
LIFRE TYPE STRING,
MEINS TYPE STRING,
FRGRL TYPE STRING,
AFDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INVOICING_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_INVOICING_STR-MANDT sy-vline 
WA_INVOICING_STR-EBELN sy-vline 
WA_INVOICING_STR-EBELP sy-vline 
WA_INVOICING_STR-BUKRS sy-vline 
WA_INVOICING_STR-WERKS sy-vline 
WA_INVOICING_STR-FPLNR sy-vline 
WA_INVOICING_STR-REPOS sy-vline 
WA_INVOICING_STR-LOEKZ sy-vline 
WA_INVOICING_STR-EREKZ sy-vline 
WA_INVOICING_STR-XERSY sy-vline 
WA_INVOICING_STR-MEMORY sy-vline 
WA_INVOICING_STR-LIFNR sy-vline 
WA_INVOICING_STR-TXZ01 sy-vline 
WA_INVOICING_STR-MENGE sy-vline 
WA_INVOICING_STR-MWSKZ sy-vline 
WA_INVOICING_STR-PSTYP sy-vline 
WA_INVOICING_STR-WEPOS sy-vline 
WA_INVOICING_STR-WEUNB sy-vline 
WA_INVOICING_STR-WEBRE sy-vline 
WA_INVOICING_STR-TXJCD sy-vline 
WA_INVOICING_STR-RETPO sy-vline 
WA_INVOICING_STR-FPLTR sy-vline 
WA_INVOICING_STR-FKDAT sy-vline 
WA_INVOICING_STR-FAREG sy-vline 
WA_INVOICING_STR-FAKWR sy-vline 
WA_INVOICING_STR-FAKSP sy-vline 
WA_INVOICING_STR-WAERS2 sy-vline 
WA_INVOICING_STR-WAERS sy-vline 
WA_INVOICING_STR-KUFIX sy-vline 
WA_INVOICING_STR-WKURS sy-vline 
WA_INVOICING_STR-ZTERM sy-vline 
WA_INVOICING_STR-LIFRE sy-vline 
WA_INVOICING_STR-MEINS sy-vline 
WA_INVOICING_STR-FRGRL sy-vline 
WA_INVOICING_STR-AFDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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