ABAP Select data from SAP table UNS_UNSCAN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UNS_UNSCAN
*  INTO TABLE @DATA(IT_UNS_UNSCAN2).
*--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_UNS_UNSCAN INDEX 1 INTO DATA(WA_UNS_UNSCAN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UNS_UNSCAN>-LED = 1.
<UNS_UNSCAN>-UC = 1.
<UNS_UNSCAN>-ORGSYS = 1.
<UNS_UNSCAN>-PROG = 1.
<UNS_UNSCAN>-INCL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UNS_UNSCAN-LINE, sy-vline,
  WA_UNS_UNSCAN-CODE, sy-vline,
  WA_UNS_UNSCAN-MESS, sy-vline,
  WA_UNS_UNSCAN-AUT, sy-vline,
  WA_UNS_UNSCAN-DEV, sy-vline,
  WA_UNS_UNSCAN-DEVAUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UNS_UNSCAN 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_UNS_UNSCAN 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_UNS_UNSCAN INTO WA_UNS_UNSCAN.


*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_UNS_UNSCAN_STR, 
LED TYPE STRING,
UC TYPE STRING,
ORGSYS TYPE STRING,
PROG TYPE STRING,
INCL TYPE STRING,
LINE TYPE STRING,
CODE TYPE STRING,
MESS TYPE STRING,
AUT TYPE STRING,
DEV TYPE STRING,
DEVAUT TYPE STRING,
COMPONENT TYPE STRING,
ERR_NUMB TYPE STRING,
ERR_KIND TYPE STRING,
TINDEX TYPE STRING,
OBJ TYPE STRING,
OBJ_N TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UNS_UNSCAN_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_UNS_UNSCAN_STR-LED sy-vline 
WA_UNS_UNSCAN_STR-UC sy-vline 
WA_UNS_UNSCAN_STR-ORGSYS sy-vline 
WA_UNS_UNSCAN_STR-PROG sy-vline 
WA_UNS_UNSCAN_STR-INCL sy-vline 
WA_UNS_UNSCAN_STR-LINE sy-vline 
WA_UNS_UNSCAN_STR-CODE sy-vline 
WA_UNS_UNSCAN_STR-MESS sy-vline 
WA_UNS_UNSCAN_STR-AUT sy-vline 
WA_UNS_UNSCAN_STR-DEV sy-vline 
WA_UNS_UNSCAN_STR-DEVAUT sy-vline 
WA_UNS_UNSCAN_STR-COMPONENT sy-vline 
WA_UNS_UNSCAN_STR-ERR_NUMB sy-vline 
WA_UNS_UNSCAN_STR-ERR_KIND sy-vline 
WA_UNS_UNSCAN_STR-TINDEX sy-vline 
WA_UNS_UNSCAN_STR-OBJ sy-vline 
WA_UNS_UNSCAN_STR-OBJ_N sy-vline      INTO ld_text SEPARATED BY SPACE.

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