ABAP Select data from SAP table USER02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP USER02 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 USER02. 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 USER02 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_USER02 TYPE STANDARD TABLE OF USER02,
      WA_USER02 TYPE USER02,
      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: <USER02> TYPE USER02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_USER02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM USER02
  INTO TABLE IT_USER02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USER02
*  INTO TABLE @DATA(IT_USER022).
*--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_USER02 INDEX 1 INTO DATA(WA_USER022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_USER02 ASSIGNING <USER02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USER02>-BCODE = 1.
<USER02>-GLTGV = 1.
<USER02>-GLTGB = 1.
<USER02>-USTYP = 1.
<USER02>-CLASS = 1.

ENDLOOP.

LOOP AT IT_USER02 INTO WA_USER02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USER02-LOCNT, sy-vline,
  WA_USER02-UFLAG, sy-vline,
  WA_USER02-ACCNT, sy-vline,
  WA_USER02-ANAME, sy-vline,
  WA_USER02-ERDAT, sy-vline,
  WA_USER02-TRDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USER02 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_USER02 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_USER02 INTO WA_USER02.


*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 USTYP, internal->external for field USTYP
CALL FUNCTION 'CONVERSION_EXIT_USTYP_OUTPUT'
  EXPORTING
    input =                      WA_USER02-USTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USER02-USTYP.
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_USER02_STR, 
BCODE TYPE STRING,
GLTGV TYPE STRING,
GLTGB TYPE STRING,
USTYP TYPE STRING,
CLASS TYPE STRING,
LOCNT TYPE STRING,
UFLAG TYPE STRING,
ACCNT TYPE STRING,
ANAME TYPE STRING,
ERDAT TYPE STRING,
TRDAT TYPE STRING,
LTIME TYPE STRING,
OCOD1 TYPE STRING,
BCDA1 TYPE STRING,
CODV1 TYPE STRING,
OCOD2 TYPE STRING,
BCDA2 TYPE STRING,
CODV2 TYPE STRING,
OCOD3 TYPE STRING,
BCDA3 TYPE STRING,
CODV3 TYPE STRING,
OCOD4 TYPE STRING,
BCDA4 TYPE STRING,
CODV4 TYPE STRING,
OCOD5 TYPE STRING,
BCDA5 TYPE STRING,
CODV5 TYPE STRING,
VERSN TYPE STRING,
CODVN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USER02_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_USER02_STR-BCODE sy-vline 
WA_USER02_STR-GLTGV sy-vline 
WA_USER02_STR-GLTGB sy-vline 
WA_USER02_STR-USTYP sy-vline 
WA_USER02_STR-CLASS sy-vline 
WA_USER02_STR-LOCNT sy-vline 
WA_USER02_STR-UFLAG sy-vline 
WA_USER02_STR-ACCNT sy-vline 
WA_USER02_STR-ANAME sy-vline 
WA_USER02_STR-ERDAT sy-vline 
WA_USER02_STR-TRDAT sy-vline 
WA_USER02_STR-LTIME sy-vline 
WA_USER02_STR-OCOD1 sy-vline 
WA_USER02_STR-BCDA1 sy-vline 
WA_USER02_STR-CODV1 sy-vline 
WA_USER02_STR-OCOD2 sy-vline 
WA_USER02_STR-BCDA2 sy-vline 
WA_USER02_STR-CODV2 sy-vline 
WA_USER02_STR-OCOD3 sy-vline 
WA_USER02_STR-BCDA3 sy-vline 
WA_USER02_STR-CODV3 sy-vline 
WA_USER02_STR-OCOD4 sy-vline 
WA_USER02_STR-BCDA4 sy-vline 
WA_USER02_STR-CODV4 sy-vline 
WA_USER02_STR-OCOD5 sy-vline 
WA_USER02_STR-BCDA5 sy-vline 
WA_USER02_STR-CODV5 sy-vline 
WA_USER02_STR-VERSN sy-vline 
WA_USER02_STR-CODVN sy-vline      INTO ld_text SEPARATED BY SPACE.

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