ABAP Select data from SAP table IACMUSR02 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP IACMUSR02 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 IACMUSR02. 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 IACMUSR02 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_IACMUSR02 TYPE STANDARD TABLE OF IACMUSR02,
      WA_IACMUSR02 TYPE IACMUSR02,
      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: <IACMUSR02> TYPE IACMUSR02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IACMUSR02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IACMUSR02
  INTO TABLE IT_IACMUSR02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IACMUSR02
*  INTO TABLE @DATA(IT_IACMUSR022).
*--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_IACMUSR02 INDEX 1 INTO DATA(WA_IACMUSR022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IACMUSR02 ASSIGNING <IACMUSR02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IACMUSR02>-MANDT = 1.
<IACMUSR02>-BNAME = 1.
<IACMUSR02>-GLTGV = 1.
<IACMUSR02>-GLTGB = 1.
<IACMUSR02>-USTYP = 1.

ENDLOOP.

LOOP AT IT_IACMUSR02 INTO WA_IACMUSR02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IACMUSR02-CLASS, sy-vline,
  WA_IACMUSR02-UFLAG, sy-vline,
  WA_IACMUSR02-ACCNT, sy-vline,
  WA_IACMUSR02-ANAME, sy-vline,
  WA_IACMUSR02-ERDAT, sy-vline,
  WA_IACMUSR02-TRDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IACMUSR02 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_IACMUSR02 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_IACMUSR02 INTO WA_IACMUSR02.


*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_IACMUSR02-USTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IACMUSR02-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_IACMUSR02_STR, 
MANDT TYPE STRING,
BNAME TYPE STRING,
GLTGV TYPE STRING,
GLTGB TYPE STRING,
USTYP TYPE STRING,
CLASS TYPE STRING,
UFLAG TYPE STRING,
ACCNT TYPE STRING,
ANAME TYPE STRING,
ERDAT TYPE STRING,
TRDAT TYPE STRING,
LTIME TYPE STRING,
VERSN TYPE STRING,
CODVN TYPE STRING,
TZONE TYPE STRING,
ZBVMASTER TYPE STRING,
RESERVED TYPE STRING,
SECURITY_POLICY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IACMUSR02_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_IACMUSR02_STR-MANDT sy-vline 
WA_IACMUSR02_STR-BNAME sy-vline 
WA_IACMUSR02_STR-GLTGV sy-vline 
WA_IACMUSR02_STR-GLTGB sy-vline 
WA_IACMUSR02_STR-USTYP sy-vline 
WA_IACMUSR02_STR-CLASS sy-vline 
WA_IACMUSR02_STR-UFLAG sy-vline 
WA_IACMUSR02_STR-ACCNT sy-vline 
WA_IACMUSR02_STR-ANAME sy-vline 
WA_IACMUSR02_STR-ERDAT sy-vline 
WA_IACMUSR02_STR-TRDAT sy-vline 
WA_IACMUSR02_STR-LTIME sy-vline 
WA_IACMUSR02_STR-VERSN sy-vline 
WA_IACMUSR02_STR-CODVN sy-vline 
WA_IACMUSR02_STR-TZONE sy-vline 
WA_IACMUSR02_STR-ZBVMASTER sy-vline 
WA_IACMUSR02_STR-RESERVED sy-vline 
WA_IACMUSR02_STR-SECURITY_POLICY sy-vline      INTO ld_text SEPARATED BY SPACE.

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