ABAP Select data from SAP table BIW_NETW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BIW_NETW 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_NETW. 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_NETW 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_NETW TYPE STANDARD TABLE OF BIW_NETW,
      WA_BIW_NETW TYPE BIW_NETW,
      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_NETW> TYPE BIW_NETW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BIW_NETW
*  INTO TABLE @DATA(IT_BIW_NETW2).
*--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_NETW INDEX 1 INTO DATA(WA_BIW_NETW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BIW_NETW>-AUFNR = 1.
<BIW_NETW>-AEDAT = 1.
<BIW_NETW>-ERDAT = 1.
<BIW_NETW>-BUKRS = 1.
<BIW_NETW>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BIW_NETW-GSBER, sy-vline,
  WA_BIW_NETW-KOKRS, sy-vline,
  WA_BIW_NETW-KOSTV, sy-vline,
  WA_BIW_NETW-WAERS, sy-vline,
  WA_BIW_NETW-PRCTR, sy-vline,
  WA_BIW_NETW-POSID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BIW_NETW 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_NETW 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_NETW INTO WA_BIW_NETW.


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

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

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

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_BIW_NETW-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_NETW-POSID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSN, internal->external for field PSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_BIW_NETW-PSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_NETW-PSPID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field TLVOR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_BIW_NETW-TLVOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_NETW-TLVOR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AKSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BIW_NETW-AKSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_NETW-AKSTL.
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_NETW_STR, 
AUFNR TYPE STRING,
AEDAT TYPE STRING,
ERDAT TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
GSBER TYPE STRING,
KOKRS TYPE STRING,
KOSTV TYPE STRING,
WAERS TYPE STRING,
PRCTR TYPE STRING,
POSID TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PSPID TYPE STRING,
DISPO TYPE STRING,
APRIO TYPE STRING,
SUBNT TYPE STRING,
TLVOR TYPE STRING,
AUART TYPE STRING,
AKSTL TYPE STRING,
BWSTSYS0 TYPE STRING,
OBJNR TYPE STRING,
GUID TYPE STRING,
CPR_GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BIW_NETW_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_NETW_STR-AUFNR sy-vline 
WA_BIW_NETW_STR-AEDAT sy-vline 
WA_BIW_NETW_STR-ERDAT sy-vline 
WA_BIW_NETW_STR-BUKRS sy-vline 
WA_BIW_NETW_STR-WERKS sy-vline 
WA_BIW_NETW_STR-GSBER sy-vline 
WA_BIW_NETW_STR-KOKRS sy-vline 
WA_BIW_NETW_STR-KOSTV sy-vline 
WA_BIW_NETW_STR-WAERS sy-vline 
WA_BIW_NETW_STR-PRCTR sy-vline 
WA_BIW_NETW_STR-POSID sy-vline 
WA_BIW_NETW_STR-KDAUF sy-vline 
WA_BIW_NETW_STR-KDPOS sy-vline 
WA_BIW_NETW_STR-PSPID sy-vline 
WA_BIW_NETW_STR-DISPO sy-vline 
WA_BIW_NETW_STR-APRIO sy-vline 
WA_BIW_NETW_STR-SUBNT sy-vline 
WA_BIW_NETW_STR-TLVOR sy-vline 
WA_BIW_NETW_STR-AUART sy-vline 
WA_BIW_NETW_STR-AKSTL sy-vline 
WA_BIW_NETW_STR-BWSTSYS0 sy-vline 
WA_BIW_NETW_STR-OBJNR sy-vline 
WA_BIW_NETW_STR-GUID sy-vline 
WA_BIW_NETW_STR-CPR_GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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