ABAP Select data from SAP table XUSR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM XUSR
*  INTO TABLE @DATA(IT_XUSR2).
*--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_XUSR INDEX 1 INTO DATA(WA_XUSR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<XUSR>-MANDT = 1.
<XUSR>-BNAME = 1.
<XUSR>-BCODE = 1.
<XUSR>-CDATE = 1.
<XUSR>-USCNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_XUSR-SECNT, sy-vline,
  WA_XUSR-UFLAG, sy-vline,
  WA_XUSR-HTERM, sy-vline,
  WA_XUSR-HMAND, sy-vline,
  WA_XUSR-HNAME, sy-vline,
  WA_XUSR-HCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_XUSR 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_XUSR 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_XUSR INTO WA_XUSR.


*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_XUSR_STR, 
MANDT TYPE STRING,
BNAME TYPE STRING,
BCODE TYPE STRING,
CDATE TYPE STRING,
USCNT TYPE STRING,
SECNT TYPE STRING,
UFLAG TYPE STRING,
HTERM TYPE STRING,
HMAND TYPE STRING,
HNAME TYPE STRING,
HCODE TYPE STRING,
STTRA TYPE STRING,
TRMEN TYPE STRING,
TELNR TYPE STRING,
MENAM TYPE STRING,
DRUCK TYPE STRING,
DRUK1 TYPE STRING,
DRUK2 TYPE STRING,
DRUK3 TYPE STRING,
CMDSY TYPE STRING,
CMDFP TYPE STRING,
CMDMC TYPE STRING,
CMDRS TYPE STRING,
DATFM TYPE STRING,
DCPFM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_XUSR_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_XUSR_STR-MANDT sy-vline 
WA_XUSR_STR-BNAME sy-vline 
WA_XUSR_STR-BCODE sy-vline 
WA_XUSR_STR-CDATE sy-vline 
WA_XUSR_STR-USCNT sy-vline 
WA_XUSR_STR-SECNT sy-vline 
WA_XUSR_STR-UFLAG sy-vline 
WA_XUSR_STR-HTERM sy-vline 
WA_XUSR_STR-HMAND sy-vline 
WA_XUSR_STR-HNAME sy-vline 
WA_XUSR_STR-HCODE sy-vline 
WA_XUSR_STR-STTRA sy-vline 
WA_XUSR_STR-TRMEN sy-vline 
WA_XUSR_STR-TELNR sy-vline 
WA_XUSR_STR-MENAM sy-vline 
WA_XUSR_STR-DRUCK sy-vline 
WA_XUSR_STR-DRUK1 sy-vline 
WA_XUSR_STR-DRUK2 sy-vline 
WA_XUSR_STR-DRUK3 sy-vline 
WA_XUSR_STR-CMDSY sy-vline 
WA_XUSR_STR-CMDFP sy-vline 
WA_XUSR_STR-CMDMC sy-vline 
WA_XUSR_STR-CMDRS sy-vline 
WA_XUSR_STR-DATFM sy-vline 
WA_XUSR_STR-DCPFM sy-vline      INTO ld_text SEPARATED BY SPACE.

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