ABAP Select data from SAP table /SCF/UNAV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCF/UNAV 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 /SCF/UNAV. 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 /SCF/UNAV 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_/SCF/UNAV TYPE STANDARD TABLE OF /SCF/UNAV,
      WA_/SCF/UNAV TYPE /SCF/UNAV,
      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: </SCF/UNAV> TYPE /SCF/UNAV.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCF/UNAV
  INTO TABLE IT_/SCF/UNAV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCF/UNAV
*  INTO TABLE @DATA(IT_/SCF/UNAV2).
*--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_/SCF/UNAV INDEX 1 INTO DATA(WA_/SCF/UNAV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCF/UNAV ASSIGNING </SCF/UNAV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCF/UNAV>-MANDT = 1.
</SCF/UNAV>-APPID = 1.
</SCF/UNAV>-APPVIEW = 1.
</SCF/UNAV>-UNAME = 1.
</SCF/UNAV>-NODEID = 1.

ENDLOOP.

LOOP AT IT_/SCF/UNAV INTO WA_/SCF/UNAV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCF/UNAV-NODEPARENTID, sy-vline,
  WA_/SCF/UNAV-NODESEQU, sy-vline,
  WA_/SCF/UNAV-ISOPEN, sy-vline,
  WA_/SCF/UNAV-ISBSP, sy-vline,
  WA_/SCF/UNAV-SCRID, sy-vline,
  WA_/SCF/UNAV-ISURL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCF/UNAV 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_/SCF/UNAV 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_/SCF/UNAV INTO WA_/SCF/UNAV.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/SCF/UNAV_STR, 
MANDT TYPE STRING,
APPID TYPE STRING,
APPVIEW TYPE STRING,
UNAME TYPE STRING,
NODEID TYPE STRING,
NODEPARENTID TYPE STRING,
NODESEQU TYPE STRING,
ISOPEN TYPE STRING,
ISBSP TYPE STRING,
SCRID TYPE STRING,
ISURL TYPE STRING,
TCODE TYPE STRING,
NODETEXT TYPE STRING,
NODETTIP TYPE STRING,
CUSER TYPE STRING,
CDATE TYPE STRING,
CTIME TYPE STRING,
UUSER TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
ISWD TYPE STRING,
WD_COMPONENT TYPE STRING,
WD_ITERFACE_VIEW TYPE STRING,
WD_PLUG_NAME TYPE STRING,
WD_PLUG_ADMIN TYPE STRING,
WD_VIRTUAL_NODE TYPE STRING,
WD_MESSAGE_AREA TYPE STRING,
WD_CONFIG_ID TYPE STRING,
WD_CONFIG_TYPE TYPE STRING,
WD_CONFIG_VAR TYPE STRING,
SWITCHID TYPE STRING,
SHOWHIDE TYPE STRING,
WD_APPLICATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCF/UNAV_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_/SCF/UNAV_STR-MANDT sy-vline 
WA_/SCF/UNAV_STR-APPID sy-vline 
WA_/SCF/UNAV_STR-APPVIEW sy-vline 
WA_/SCF/UNAV_STR-UNAME sy-vline 
WA_/SCF/UNAV_STR-NODEID sy-vline 
WA_/SCF/UNAV_STR-NODEPARENTID sy-vline 
WA_/SCF/UNAV_STR-NODESEQU sy-vline 
WA_/SCF/UNAV_STR-ISOPEN sy-vline 
WA_/SCF/UNAV_STR-ISBSP sy-vline 
WA_/SCF/UNAV_STR-SCRID sy-vline 
WA_/SCF/UNAV_STR-ISURL sy-vline 
WA_/SCF/UNAV_STR-TCODE sy-vline 
WA_/SCF/UNAV_STR-NODETEXT sy-vline 
WA_/SCF/UNAV_STR-NODETTIP sy-vline 
WA_/SCF/UNAV_STR-CUSER sy-vline 
WA_/SCF/UNAV_STR-CDATE sy-vline 
WA_/SCF/UNAV_STR-CTIME sy-vline 
WA_/SCF/UNAV_STR-UUSER sy-vline 
WA_/SCF/UNAV_STR-UDATE sy-vline 
WA_/SCF/UNAV_STR-UTIME sy-vline 
WA_/SCF/UNAV_STR-ISWD sy-vline 
WA_/SCF/UNAV_STR-WD_COMPONENT sy-vline 
WA_/SCF/UNAV_STR-WD_ITERFACE_VIEW sy-vline 
WA_/SCF/UNAV_STR-WD_PLUG_NAME sy-vline 
WA_/SCF/UNAV_STR-WD_PLUG_ADMIN sy-vline 
WA_/SCF/UNAV_STR-WD_VIRTUAL_NODE sy-vline 
WA_/SCF/UNAV_STR-WD_MESSAGE_AREA sy-vline 
WA_/SCF/UNAV_STR-WD_CONFIG_ID sy-vline 
WA_/SCF/UNAV_STR-WD_CONFIG_TYPE sy-vline 
WA_/SCF/UNAV_STR-WD_CONFIG_VAR sy-vline 
WA_/SCF/UNAV_STR-SWITCHID sy-vline 
WA_/SCF/UNAV_STR-SHOWHIDE sy-vline 
WA_/SCF/UNAV_STR-WD_APPLICATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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