ABAP Select data from SAP table BIW_NTW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BIW_NTW 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_NTW. 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_NTW 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_NTW TYPE STANDARD TABLE OF BIW_NTW,
      WA_BIW_NTW TYPE BIW_NTW,
      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_NTW> TYPE BIW_NTW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BIW_NTW
*  INTO TABLE @DATA(IT_BIW_NTW2).
*--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_NTW INDEX 1 INTO DATA(WA_BIW_NTW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BIW_NTW>-MANDT = 1.
<BIW_NTW>-AUFNR = 1.
<BIW_NTW>-POSID_INT = 1.
<BIW_NTW>-PSPID_INT = 1.
<BIW_NTW>-AUART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BIW_NTW-AUTYP, sy-vline,
  WA_BIW_NTW-ERDAT, sy-vline,
  WA_BIW_NTW-AEDAT, sy-vline,
  WA_BIW_NTW-KTEXT, sy-vline,
  WA_BIW_NTW-BUKRS, sy-vline,
  WA_BIW_NTW-WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BIW_NTW 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_NTW 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_NTW INTO WA_BIW_NTW.


*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_NTW-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_NTW-AUFNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit KONPD, internal->external for field PSPID_INT
CALL FUNCTION 'CONVERSION_EXIT_KONPD_OUTPUT'
  EXPORTING
    input =                      WA_BIW_NTW-PSPID_INT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_NTW-PSPID_INT.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit SCOPE, internal->external for field SCOPE
CALL FUNCTION 'CONVERSION_EXIT_SCOPE_OUTPUT'
  EXPORTING
    input =                      WA_BIW_NTW-SCOPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_NTW-SCOPE.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field SUBNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BIW_NTW-SUBNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_NTW-SUBNT.
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_NTW_STR, 
MANDT TYPE STRING,
AUFNR TYPE STRING,
POSID_INT TYPE STRING,
PSPID_INT TYPE STRING,
AUART TYPE STRING,
AUTYP TYPE STRING,
ERDAT TYPE STRING,
AEDAT TYPE STRING,
KTEXT TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
GSBER TYPE STRING,
KOKRS TYPE STRING,
KOSTV TYPE STRING,
STORT TYPE STRING,
SOWRK TYPE STRING,
WAERS TYPE STRING,
OBJNR TYPE STRING,
PRCTR TYPE STRING,
VNAME TYPE STRING,
TXJCD TYPE STRING,
JV_JIBSA TYPE STRING,
SCOPE TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
IVPRO TYPE STRING,
LOGSYSTEM TYPE STRING,
AKSTL TYPE STRING,
APLZT TYPE STRING,
AUFPT TYPE STRING,
DISPO TYPE STRING,
APRIO TYPE STRING,
SUBNT TYPE STRING,
GLTRP TYPE STRING,
GSTRP TYPE STRING,
FTRMS TYPE STRING,
GLTRS TYPE STRING,
GSTRS TYPE STRING,
GSTRI TYPE STRING,
GETRI TYPE STRING,
GLTRI TYPE STRING,
FTRMI TYPE STRING,
FTRMP TYPE STRING,
GLTPP TYPE STRING,
GSTPP TYPE STRING,
GLTPS TYPE STRING,
GSTPS TYPE STRING,
FTRPS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BIW_NTW_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_NTW_STR-MANDT sy-vline 
WA_BIW_NTW_STR-AUFNR sy-vline 
WA_BIW_NTW_STR-POSID_INT sy-vline 
WA_BIW_NTW_STR-PSPID_INT sy-vline 
WA_BIW_NTW_STR-AUART sy-vline 
WA_BIW_NTW_STR-AUTYP sy-vline 
WA_BIW_NTW_STR-ERDAT sy-vline 
WA_BIW_NTW_STR-AEDAT sy-vline 
WA_BIW_NTW_STR-KTEXT sy-vline 
WA_BIW_NTW_STR-BUKRS sy-vline 
WA_BIW_NTW_STR-WERKS sy-vline 
WA_BIW_NTW_STR-GSBER sy-vline 
WA_BIW_NTW_STR-KOKRS sy-vline 
WA_BIW_NTW_STR-KOSTV sy-vline 
WA_BIW_NTW_STR-STORT sy-vline 
WA_BIW_NTW_STR-SOWRK sy-vline 
WA_BIW_NTW_STR-WAERS sy-vline 
WA_BIW_NTW_STR-OBJNR sy-vline 
WA_BIW_NTW_STR-PRCTR sy-vline 
WA_BIW_NTW_STR-VNAME sy-vline 
WA_BIW_NTW_STR-TXJCD sy-vline 
WA_BIW_NTW_STR-JV_JIBSA sy-vline 
WA_BIW_NTW_STR-SCOPE sy-vline 
WA_BIW_NTW_STR-KDAUF sy-vline 
WA_BIW_NTW_STR-KDPOS sy-vline 
WA_BIW_NTW_STR-IVPRO sy-vline 
WA_BIW_NTW_STR-LOGSYSTEM sy-vline 
WA_BIW_NTW_STR-AKSTL sy-vline 
WA_BIW_NTW_STR-APLZT sy-vline 
WA_BIW_NTW_STR-AUFPT sy-vline 
WA_BIW_NTW_STR-DISPO sy-vline 
WA_BIW_NTW_STR-APRIO sy-vline 
WA_BIW_NTW_STR-SUBNT sy-vline 
WA_BIW_NTW_STR-GLTRP sy-vline 
WA_BIW_NTW_STR-GSTRP sy-vline 
WA_BIW_NTW_STR-FTRMS sy-vline 
WA_BIW_NTW_STR-GLTRS sy-vline 
WA_BIW_NTW_STR-GSTRS sy-vline 
WA_BIW_NTW_STR-GSTRI sy-vline 
WA_BIW_NTW_STR-GETRI sy-vline 
WA_BIW_NTW_STR-GLTRI sy-vline 
WA_BIW_NTW_STR-FTRMI sy-vline 
WA_BIW_NTW_STR-FTRMP sy-vline 
WA_BIW_NTW_STR-GLTPP sy-vline 
WA_BIW_NTW_STR-GSTPP sy-vline 
WA_BIW_NTW_STR-GLTPS sy-vline 
WA_BIW_NTW_STR-GSTPS sy-vline 
WA_BIW_NTW_STR-FTRPS sy-vline      INTO ld_text SEPARATED BY SPACE.

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