ABAP Select data from SAP table USR01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP USR01 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 USR01. 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 USR01 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_USR01 TYPE STANDARD TABLE OF USR01,
      WA_USR01 TYPE USR01,
      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: <USR01> TYPE USR01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_USR01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM USR01
  INTO TABLE IT_USR01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USR01
*  INTO TABLE @DATA(IT_USR012).
*--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_USR01 INDEX 1 INTO DATA(WA_USR012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_USR01 ASSIGNING <USR01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USR01>-MANDT = 1.
<USR01>-BNAME = 1.
<USR01>-STCOD = 1.
<USR01>-SPLD = 1.
<USR01>-SPLG = 1.

ENDLOOP.

LOOP AT IT_USR01 INTO WA_USR01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USR01-SPDB, sy-vline,
  WA_USR01-SPDA, sy-vline,
  WA_USR01-DATFM, sy-vline,
  WA_USR01-DCPFM, sy-vline,
  WA_USR01-HDEST, sy-vline,
  WA_USR01-HMAND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USR01 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_USR01 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_USR01 INTO WA_USR01.


*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 SPDEV, internal->external for field SPLD
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_USR01-SPLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USR01-SPLD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_USR01-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USR01-LANGU.
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_USR01_STR, 
MANDT TYPE STRING,
BNAME TYPE STRING,
STCOD TYPE STRING,
SPLD TYPE STRING,
SPLG TYPE STRING,
SPDB TYPE STRING,
SPDA TYPE STRING,
DATFM TYPE STRING,
DCPFM TYPE STRING,
HDEST TYPE STRING,
HMAND TYPE STRING,
HNAME TYPE STRING,
MENON TYPE STRING,
MENUE TYPE STRING,
STRTT TYPE STRING,
LANGU TYPE STRING,
CATTKENNZ TYPE STRING,
TIMEFM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USR01_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_USR01_STR-MANDT sy-vline 
WA_USR01_STR-BNAME sy-vline 
WA_USR01_STR-STCOD sy-vline 
WA_USR01_STR-SPLD sy-vline 
WA_USR01_STR-SPLG sy-vline 
WA_USR01_STR-SPDB sy-vline 
WA_USR01_STR-SPDA sy-vline 
WA_USR01_STR-DATFM sy-vline 
WA_USR01_STR-DCPFM sy-vline 
WA_USR01_STR-HDEST sy-vline 
WA_USR01_STR-HMAND sy-vline 
WA_USR01_STR-HNAME sy-vline 
WA_USR01_STR-MENON sy-vline 
WA_USR01_STR-MENUE sy-vline 
WA_USR01_STR-STRTT sy-vline 
WA_USR01_STR-LANGU sy-vline 
WA_USR01_STR-CATTKENNZ sy-vline 
WA_USR01_STR-TIMEFM sy-vline      INTO ld_text SEPARATED BY SPACE.

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