ABAP Select data from SAP table DIWPS_WP_NAV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DIWPS_WP_NAV
*  INTO TABLE @DATA(IT_DIWPS_WP_NAV2).
*--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_DIWPS_WP_NAV INDEX 1 INTO DATA(WA_DIWPS_WP_NAV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DIWPS_WP_NAV>-FLEET = 1.
<DIWPS_WP_NAV>-ICON_WP = 1.
<DIWPS_WP_NAV>-MANDT = 1.
<DIWPS_WP_NAV>-WPID = 1.
<DIWPS_WP_NAV>-KTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DIWPS_WP_NAV-TAIL_NO, sy-vline,
  WA_DIWPS_WP_NAV-NETWORK_NO, sy-vline,
  WA_DIWPS_WP_NAV-DEL_FLG, sy-vline,
  WA_DIWPS_WP_NAV-EXPLODED_FLG, sy-vline,
  WA_DIWPS_WP_NAV-ERNAM, sy-vline,
  WA_DIWPS_WP_NAV-ERDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DIWPS_WP_NAV 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_DIWPS_WP_NAV 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_DIWPS_WP_NAV INTO WA_DIWPS_WP_NAV.


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

*Conversion exit TPLNR, internal->external for field TAIL_NO
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_WP_NAV-TAIL_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_WP_NAV-TAIL_NO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_WP_NAV-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_WP_NAV-ATINN.
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_DIWPS_WP_NAV_STR, 
FLEET TYPE STRING,
ICON_WP TYPE STRING,
MANDT TYPE STRING,
WPID TYPE STRING,
KTEXT TYPE STRING,
TAIL_NO TYPE STRING,
NETWORK_NO TYPE STRING,
DEL_FLG TYPE STRING,
EXPLODED_FLG TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
STTXT TYPE STRING,
WPCTYP TYPE STRING,
IWERK TYPE STRING,
VAPLZ TYPE STRING,
VAWRK TYPE STRING,
ATINN TYPE STRING,
ATNAM TYPE STRING,
ATWRT TYPE STRING,
TABNAM TYPE STRING,
FIELDNAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DIWPS_WP_NAV_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_DIWPS_WP_NAV_STR-FLEET sy-vline 
WA_DIWPS_WP_NAV_STR-ICON_WP sy-vline 
WA_DIWPS_WP_NAV_STR-MANDT sy-vline 
WA_DIWPS_WP_NAV_STR-WPID sy-vline 
WA_DIWPS_WP_NAV_STR-KTEXT sy-vline 
WA_DIWPS_WP_NAV_STR-TAIL_NO sy-vline 
WA_DIWPS_WP_NAV_STR-NETWORK_NO sy-vline 
WA_DIWPS_WP_NAV_STR-DEL_FLG sy-vline 
WA_DIWPS_WP_NAV_STR-EXPLODED_FLG sy-vline 
WA_DIWPS_WP_NAV_STR-ERNAM sy-vline 
WA_DIWPS_WP_NAV_STR-ERDAT sy-vline 
WA_DIWPS_WP_NAV_STR-STTXT sy-vline 
WA_DIWPS_WP_NAV_STR-WPCTYP sy-vline 
WA_DIWPS_WP_NAV_STR-IWERK sy-vline 
WA_DIWPS_WP_NAV_STR-VAPLZ sy-vline 
WA_DIWPS_WP_NAV_STR-VAWRK sy-vline 
WA_DIWPS_WP_NAV_STR-ATINN sy-vline 
WA_DIWPS_WP_NAV_STR-ATNAM sy-vline 
WA_DIWPS_WP_NAV_STR-ATWRT sy-vline 
WA_DIWPS_WP_NAV_STR-TABNAM sy-vline 
WA_DIWPS_WP_NAV_STR-FIELDNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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