ABAP Select data from SAP table BAPI_INV_LINE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_INV_LINE
*  INTO TABLE @DATA(IT_BAPI_INV_LINE2).
*--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_BAPI_INV_LINE INDEX 1 INTO DATA(WA_BAPI_INV_LINE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_INV_LINE>-DOC_NO = 1.
<BAPI_INV_LINE>-LINE_TYPE = 1.
<BAPI_INV_LINE>-BETRW = 1.
<BAPI_INV_LINE>-BETRW_NET = 1.
<BAPI_INV_LINE>-CURRENCY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_INV_LINE-QUANTITY, sy-vline,
  WA_BAPI_INV_LINE-UNIT, sy-vline,
  WA_BAPI_INV_LINE-PRICE, sy-vline,
  WA_BAPI_INV_LINE-PRODUCT_ID, sy-vline,
  WA_BAPI_INV_LINE-TAXBW, sy-vline,
  WA_BAPI_INV_LINE-STRPZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_INV_LINE 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_BAPI_INV_LINE 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_BAPI_INV_LINE INTO WA_BAPI_INV_LINE.


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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field PRICE_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_INV_LINE-PRICE_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_INV_LINE-PRICE_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_BAPI_INV_LINE_STR, 
DOC_NO TYPE STRING,
LINE_TYPE TYPE STRING,
BETRW TYPE STRING,
BETRW_NET TYPE STRING,
CURRENCY TYPE STRING,
QUANTITY TYPE STRING,
UNIT TYPE STRING,
PRICE TYPE STRING,
PRODUCT_ID TYPE STRING,
TAXBW TYPE STRING,
STRPZ TYPE STRING,
MWSKZ TYPE STRING,
DATE_OF_PAYMENT TYPE STRING,
PAYMENTDATE TYPE STRING,
EXT_LINE_NO TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
PRCTR TYPE STRING,
PS_PSP_PNR TYPE STRING,
INV_BVT TYPE STRING,
BETRW_REQ TYPE STRING,
BETRW_SKONTO TYPE STRING,
RSTGR TYPE STRING,
DIFF_QUANT TYPE STRING,
FACTOR TYPE STRING,
READING_OLD TYPE STRING,
READING_NEW TYPE STRING,
MC_NAME1 TYPE STRING,
MC_NAME2 TYPE STRING,
MC_STREET TYPE STRING,
MC_HOUSE_NUM1 TYPE STRING,
MC_CITY1 TYPE STRING,
MC_POSTCODE TYPE STRING,
EXT_IDENT_TYPE TYPE STRING,
EXT_IDENT TYPE STRING,
EXT_INVOICE_NO TYPE STRING,
OWN_INVOICE_NO TYPE STRING,
VTREF TYPE STRING,
EXT_PARTNER TYPE STRING,
SBASW TYPE STRING,
SBASW_GROSS TYPE STRING,
EXT_LINE_REF_NO TYPE STRING,
EXT_LINE_NO_OLD TYPE STRING,
PRICE_UNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_INV_LINE_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_BAPI_INV_LINE_STR-DOC_NO sy-vline 
WA_BAPI_INV_LINE_STR-LINE_TYPE sy-vline 
WA_BAPI_INV_LINE_STR-BETRW sy-vline 
WA_BAPI_INV_LINE_STR-BETRW_NET sy-vline 
WA_BAPI_INV_LINE_STR-CURRENCY sy-vline 
WA_BAPI_INV_LINE_STR-QUANTITY sy-vline 
WA_BAPI_INV_LINE_STR-UNIT sy-vline 
WA_BAPI_INV_LINE_STR-PRICE sy-vline 
WA_BAPI_INV_LINE_STR-PRODUCT_ID sy-vline 
WA_BAPI_INV_LINE_STR-TAXBW sy-vline 
WA_BAPI_INV_LINE_STR-STRPZ sy-vline 
WA_BAPI_INV_LINE_STR-MWSKZ sy-vline 
WA_BAPI_INV_LINE_STR-DATE_OF_PAYMENT sy-vline 
WA_BAPI_INV_LINE_STR-PAYMENTDATE sy-vline 
WA_BAPI_INV_LINE_STR-EXT_LINE_NO sy-vline 
WA_BAPI_INV_LINE_STR-DATE_FROM sy-vline 
WA_BAPI_INV_LINE_STR-DATE_TO sy-vline 
WA_BAPI_INV_LINE_STR-KOSTL sy-vline 
WA_BAPI_INV_LINE_STR-AUFNR sy-vline 
WA_BAPI_INV_LINE_STR-PRCTR sy-vline 
WA_BAPI_INV_LINE_STR-PS_PSP_PNR sy-vline 
WA_BAPI_INV_LINE_STR-INV_BVT sy-vline 
WA_BAPI_INV_LINE_STR-BETRW_REQ sy-vline 
WA_BAPI_INV_LINE_STR-BETRW_SKONTO sy-vline 
WA_BAPI_INV_LINE_STR-RSTGR sy-vline 
WA_BAPI_INV_LINE_STR-DIFF_QUANT sy-vline 
WA_BAPI_INV_LINE_STR-FACTOR sy-vline 
WA_BAPI_INV_LINE_STR-READING_OLD sy-vline 
WA_BAPI_INV_LINE_STR-READING_NEW sy-vline 
WA_BAPI_INV_LINE_STR-MC_NAME1 sy-vline 
WA_BAPI_INV_LINE_STR-MC_NAME2 sy-vline 
WA_BAPI_INV_LINE_STR-MC_STREET sy-vline 
WA_BAPI_INV_LINE_STR-MC_HOUSE_NUM1 sy-vline 
WA_BAPI_INV_LINE_STR-MC_CITY1 sy-vline 
WA_BAPI_INV_LINE_STR-MC_POSTCODE sy-vline 
WA_BAPI_INV_LINE_STR-EXT_IDENT_TYPE sy-vline 
WA_BAPI_INV_LINE_STR-EXT_IDENT sy-vline 
WA_BAPI_INV_LINE_STR-EXT_INVOICE_NO sy-vline 
WA_BAPI_INV_LINE_STR-OWN_INVOICE_NO sy-vline 
WA_BAPI_INV_LINE_STR-VTREF sy-vline 
WA_BAPI_INV_LINE_STR-EXT_PARTNER sy-vline 
WA_BAPI_INV_LINE_STR-SBASW sy-vline 
WA_BAPI_INV_LINE_STR-SBASW_GROSS sy-vline 
WA_BAPI_INV_LINE_STR-EXT_LINE_REF_NO sy-vline 
WA_BAPI_INV_LINE_STR-EXT_LINE_NO_OLD sy-vline 
WA_BAPI_INV_LINE_STR-PRICE_UNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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