ABAP Select data from SAP table BIW_TINV_INV_LINE_A into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BIW_TINV_INV_LINE_A
*  INTO TABLE @DATA(IT_BIW_TINV_INV_LINE_A2).
*--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_BIW_TINV_INV_LINE_A INDEX 1 INTO DATA(WA_BIW_TINV_INV_LINE_A2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BIW_TINV_INV_LINE_A>-MANDT = 1.
<BIW_TINV_INV_LINE_A>-INT_INV_DOC_NO = 1.
<BIW_TINV_INV_LINE_A>-INT_INV_LINE_NO = 1.
<BIW_TINV_INV_LINE_A>-BETRW = 1.
<BIW_TINV_INV_LINE_A>-BETRW_NET = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BIW_TINV_INV_LINE_A-BETRW_REQ, sy-vline,
  WA_BIW_TINV_INV_LINE_A-BETRW_SKONTO, sy-vline,
  WA_BIW_TINV_INV_LINE_A-CURRENCY, sy-vline,
  WA_BIW_TINV_INV_LINE_A-TAXBW, sy-vline,
  WA_BIW_TINV_INV_LINE_A-STPRZ, sy-vline,
  WA_BIW_TINV_INV_LINE_A-MWSKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BIW_TINV_INV_LINE_A 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_BIW_TINV_INV_LINE_A 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_BIW_TINV_INV_LINE_A INTO WA_BIW_TINV_INV_LINE_A.


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

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

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

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

*Conversion exit ALPHA, internal->external for field BVRKO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BIW_TINV_INV_LINE_A-BVRKO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_TINV_INV_LINE_A-BVRKO.
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_BIW_TINV_INV_LINE_A_STR, 
MANDT TYPE STRING,
INT_INV_DOC_NO TYPE STRING,
INT_INV_LINE_NO TYPE STRING,
BETRW TYPE STRING,
BETRW_NET TYPE STRING,
BETRW_REQ TYPE STRING,
BETRW_SKONTO TYPE STRING,
CURRENCY TYPE STRING,
TAXBW TYPE STRING,
STPRZ 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,
LINE_TYPE TYPE STRING,
TRANSF_RELEVANT TYPE STRING,
TRANSF_DONE TYPE STRING,
RSTGR TYPE STRING,
INT_IDENT_TYPE TYPE STRING,
INT_IDENT TYPE STRING,
EXT_PARTNER TYPE STRING,
INT_PARTNER TYPE STRING,
EXT_INVOICE_NO TYPE STRING,
OWN_INVOICE_NO TYPE STRING,
VTREF TYPE STRING,
CONTRACT TYPE STRING,
VKONT_PAY TYPE STRING,
BVRKO TYPE STRING,
RODMUPDMOD TYPE STRING,
LOEVM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BIW_TINV_INV_LINE_A_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_BIW_TINV_INV_LINE_A_STR-MANDT sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-INT_INV_DOC_NO sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-INT_INV_LINE_NO sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-BETRW sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-BETRW_NET sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-BETRW_REQ sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-BETRW_SKONTO sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-CURRENCY sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-TAXBW sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-STPRZ sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-MWSKZ sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-DATE_OF_PAYMENT sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-PAYMENTDATE sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-EXT_LINE_NO sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-DATE_FROM sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-DATE_TO sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-LINE_TYPE sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-TRANSF_RELEVANT sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-TRANSF_DONE sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-RSTGR sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-INT_IDENT_TYPE sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-INT_IDENT sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-EXT_PARTNER sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-INT_PARTNER sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-EXT_INVOICE_NO sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-OWN_INVOICE_NO sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-VTREF sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-CONTRACT sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-VKONT_PAY sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-BVRKO sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-RODMUPDMOD sy-vline 
WA_BIW_TINV_INV_LINE_A_STR-LOEVM sy-vline      INTO ld_text SEPARATED BY SPACE.

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